# CUPTI Activity API

## Data Structures

struct | CUpti_Activity
| The base activity record. More...
struct | CUpti_ActivityAPI
| The activity record for a driver or runtime API invocation. More...
struct | CUpti_ActivityAutoBoostState
| Device auto boost state structure. More...
struct | CUpti_ActivityBranch
| The activity record for source level result branch. (deprecated). More...
struct | CUpti_ActivityBranch2
| The activity record for source level result branch. More...
struct | CUpti_ActivityCdpKernel
| The activity record for CDP (CUDA Dynamic Parallelism) kernel. More...
struct | CUpti_ActivityContext
| The activity record for a context. More...
struct | CUpti_ActivityCudaEvent
| The activity record for CUDA event. More...
struct | CUpti_ActivityDevice
| The activity record for a device. (deprecated). More...
struct | CUpti_ActivityDevice2
| The activity record for a device. (deprecated). More...
struct | CUpti_ActivityDevice3
| The activity record for a device. (CUDA 7.0 onwards). More...
struct | CUpti_ActivityDevice4
| The activity record for a device. (CUDA 11.6 onwards). More...
struct | CUpti_ActivityDeviceAttribute
| The activity record for a device attribute. More...
struct | CUpti_ActivityEnvironment
| The activity record for CUPTI environmental data. More...
struct | CUpti_ActivityEvent
| The activity record for a CUPTI event. More...
struct | CUpti_ActivityEventInstance
| The activity record for a CUPTI event with instance information. More...
struct | CUpti_ActivityExternalCorrelation
| The activity record for correlation with external records. More...
struct | CUpti_ActivityFunction
| The activity record for global/device functions. More...
struct | CUpti_ActivityGlobalAccess
| The activity record for source-level global access. (deprecated). More...
struct | CUpti_ActivityGlobalAccess2
| The activity record for source-level global access. (deprecated in CUDA 9.0). More...
struct | CUpti_ActivityGlobalAccess3
| The activity record for source-level global access. More...
struct | CUpti_ActivityInstantaneousEvent
| The activity record for an instantaneous CUPTI event. More...
struct | CUpti_ActivityInstantaneousEventInstance
| The activity record for an instantaneous CUPTI event with event domain instance information. More...
struct | CUpti_ActivityInstantaneousMetric
| The activity record for an instantaneous CUPTI metric. More...
struct | CUpti_ActivityInstantaneousMetricInstance
| The instantaneous activity record for a CUPTI metric with instance information. More...
struct | CUpti_ActivityInstructionCorrelation
| The activity record for source-level sass/source line-by-line correlation. More...
struct | CUpti_ActivityInstructionExecution
| The activity record for source-level instruction execution. More...
struct | CUpti_ActivityKernel
| The activity record for kernel. (deprecated). More...
struct | CUpti_ActivityKernel2
| The activity record for kernel. (deprecated). More...
struct | CUpti_ActivityKernel3
| The activity record for a kernel (CUDA 6.5(with sm_52 support) onwards). (deprecated in CUDA 9.0). More...
struct | CUpti_ActivityKernel4
| The activity record for a kernel (CUDA 9.0(with sm_70 support) onwards). (deprecated in CUDA 11.0). More...
struct | CUpti_ActivityKernel5
| The activity record for a kernel (CUDA 11.0(with sm_80 support) onwards). (deprecated in CUDA 11.2) This activity record represents a kernel execution (CUPTI_ACTIVITY_KIND_KERNEL and CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL) but is no longer generated by CUPTI. Kernel activities are now reported using the CUpti_ActivityKernel7 activity record. More...
struct | CUpti_ActivityKernel6
| The activity record for kernel. (deprecated in CUDA 11.6). More...
struct | CUpti_ActivityMarker
| The activity record providing a marker which is an instantaneous point in time. (deprecated in CUDA 8.0). More...
struct | CUpti_ActivityMarker2
| The activity record providing a marker which is an instantaneous point in time. More...
struct | CUpti_ActivityMarkerData
| The activity record providing detailed information for a marker. More...
struct | CUpti_ActivityMemcpy
| The activity record for memory copies. (deprecated). More...
struct | CUpti_ActivityMemcpy3
| The activity record for memory copies. (deprecated in CUDA 11.1). More...
struct | CUpti_ActivityMemcpy4
| The activity record for memory copies. (deprecated in CUDA 11.6). More...
struct | CUpti_ActivityMemcpy5
| The activity record for memory copies. More...
struct | CUpti_ActivityMemcpyPtoP
| The activity record for peer-to-peer memory copies. More...
struct | CUpti_ActivityMemcpyPtoP2
| The activity record for peer-to-peer memory copies. (deprecated in CUDA 11.1). More...
struct | CUpti_ActivityMemcpyPtoP3
| The activity record for peer-to-peer memory copies. (deprecated in CUDA 11.6). More...
struct | CUpti_ActivityMemcpyPtoP4
| The activity record for peer-to-peer memory copies. More...
struct | CUpti_ActivityMemory
| The activity record for memory. More...
struct | CUpti_ActivityMemory2
| The activity record for memory. More...
struct | CUpti_ActivityMemory3
| The activity record for memory. More...
struct | CUpti_ActivityMemoryPool
| The activity record for memory pool. More...
struct | CUpti_ActivityMemoryPool2
| The activity record for memory pool. More...
struct | CUpti_ActivityMemset
| The activity record for memset. (deprecated). More...
struct | CUpti_ActivityMemset2
| The activity record for memset. (deprecated in CUDA 11.1). More...
struct | CUpti_ActivityMemset3
| The activity record for memset. (deprecated in CUDA 11.6). More...
struct | CUpti_ActivityMemset4
| The activity record for memset. More...
struct | CUpti_ActivityMetric
| The activity record for a CUPTI metric. More...
struct | CUpti_ActivityMetricInstance
| The activity record for a CUPTI metric with instance information. More...
struct | CUpti_ActivityModule
| The activity record for a CUDA module. More...
struct | CUpti_ActivityName
| The activity record providing a name. More...
struct | CUpti_ActivityNvLink
| NVLink information. (deprecated in CUDA 9.0). More...
struct | CUpti_ActivityNvLink2
| NVLink information. (deprecated in CUDA 10.0). More...
struct | CUpti_ActivityNvLink3
| NVLink information. More...
struct | CUpti_ActivityNvLink4
| NVLink information. More...
union | CUpti_ActivityObjectKindId
| Identifiers for object kinds as specified by CUpti_ActivityObjectKind. More...
struct | CUpti_ActivityOpenAcc
| The base activity record for OpenAcc records. More...
struct | CUpti_ActivityOpenAccData
| The activity record for OpenACC data. More...
struct | CUpti_ActivityOpenAccLaunch
| The activity record for OpenACC launch. More...
struct | CUpti_ActivityOpenAccOther
| The activity record for OpenACC other. More...
struct | CUpti_ActivityOpenMp
| The base activity record for OpenMp records. More...
struct | CUpti_ActivityOverhead
| The activity record for CUPTI and driver overheads. More...
struct | CUpti_ActivityPcie
| PCI devices information required to construct topology. More...
struct | CUpti_ActivityPCSampling
| The activity record for PC sampling. (deprecated in CUDA 8.0). More...
struct | CUpti_ActivityPCSampling2
| The activity record for PC sampling. (deprecated in CUDA 9.0). More...
struct | CUpti_ActivityPCSampling3
| The activity record for PC sampling. More...
struct | CUpti_ActivityPCSamplingConfig
| PC sampling configuration structure. More...
struct | CUpti_ActivityPCSamplingRecordInfo
| The activity record for record status for PC sampling. More...
struct | CUpti_ActivityPreemption
| The activity record for a preemption of a CDP kernel. More...
struct | CUpti_ActivitySharedAccess
| The activity record for source-level shared access. More...
struct | CUpti_ActivitySourceLocator
| The activity record for source locator. More...
struct | CUpti_ActivityStream
| The activity record for CUDA stream. More...
struct | CUpti_ActivitySynchronization
| The activity record for synchronization management. More...
struct | CUpti_ActivityUnifiedMemoryCounter
| The activity record for Unified Memory counters (deprecated in CUDA 7.0). More...
struct | CUpti_ActivityUnifiedMemoryCounter2
| The activity record for Unified Memory counters (CUDA 7.0 and beyond). More...
struct | CUpti_ActivityUnifiedMemoryCounterConfig
| Unified Memory counters configuration structure. More...

## Defines

#define | CUPTI_AUTO_BOOST_INVALID_CLIENT_PID 0
#define | CUPTI_CORRELATION_ID_UNKNOWN 0
#define | CUPTI_FUNCTION_INDEX_ID_INVALID 0
#define | CUPTI_GRID_ID_UNKNOWN 0LL
#define | CUPTI_MAX_NVLINK_PORTS 32
#define | CUPTI_NVLINK_INVALID_PORT -1
#define | CUPTI_SOURCE_LOCATOR_ID_UNKNOWN 0
#define | CUPTI_SYNCHRONIZATION_INVALID_VALUE -1
#define | CUPTI_TIMESTAMP_UNKNOWN 0LL

## Typedefs

typedef void(* | CUpti_BuffersCallbackCompleteFunc )(CUcontext context, uint32_t streamId, uint8_t *buffer, size_t size, size_t validSize)
| Function type for callback used by CUPTI to return a buffer of activity records.
typedef void(* | CUpti_BuffersCallbackRequestFunc )(uint8_t **buffer, size_t *size, size_t *maxNumRecords)
| Function type for callback used by CUPTI to request an empty buffer for storing activity records.
typedef uint64_t(* | CUpti_TimestampCallbackFunc )(void)
| Function type for callback used by CUPTI to request a timestamp to be used in activity records.

## Enumerations

enum

CUpti_ActivityAttribute {
CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE = 0,
CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE_CDP = 1,
CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_POOL_LIMIT = 2,
CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_SIZE = 3,
CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_LIMIT = 4,
CUPTI_ACTIVITY_ATTR_ZEROED_OUT_ACTIVITY_BUFFER = 5,
CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_PRE_ALLOCATE_VALUE = 6,
CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_PRE_ALLOCATE_VALUE = 7,
CUPTI_ACTIVITY_ATTR_MEM_ALLOCATION_TYPE_HOST_PINNED = 8
}

| Activity attributes. More...
enum | CUpti_ActivityComputeApiKind { CUPTI_ACTIVITY_COMPUTE_API_UNKNOWN = 0, CUPTI_ACTIVITY_COMPUTE_API_CUDA = 1, CUPTI_ACTIVITY_COMPUTE_API_CUDA_MPS = 2 }
| The kind of a compute API. More...
enum | CUpti_ActivityEnvironmentKind { CUPTI_ACTIVITY_ENVIRONMENT_UNKNOWN = 0, CUPTI_ACTIVITY_ENVIRONMENT_SPEED = 1, CUPTI_ACTIVITY_ENVIRONMENT_TEMPERATURE = 2, CUPTI_ACTIVITY_ENVIRONMENT_POWER = 3, CUPTI_ACTIVITY_ENVIRONMENT_COOLING = 4 }
| The kind of environment data. Used to indicate what type of data is being reported by an environment activity record. More...

enum

CUpti_ActivityFlag {
CUPTI_ACTIVITY_FLAG_NONE = 0,
CUPTI_ACTIVITY_FLAG_DEVICE_CONCURRENT_KERNELS = 1 << 0,
CUPTI_ACTIVITY_FLAG_DEVICE_ATTRIBUTE_CUDEVICE = 1 << 0,
CUPTI_ACTIVITY_FLAG_MEMCPY_ASYNC = 1 << 0,
CUPTI_ACTIVITY_FLAG_MARKER_INSTANTANEOUS = 1 << 0,
CUPTI_ACTIVITY_FLAG_MARKER_START = 1 << 1,
CUPTI_ACTIVITY_FLAG_MARKER_END = 1 << 2,
CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE = 1 << 3,
CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE_SUCCESS = 1 << 4,
CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE_FAILED = 1 << 5,
CUPTI_ACTIVITY_FLAG_MARKER_SYNC_RELEASE = 1 << 6,
CUPTI_ACTIVITY_FLAG_MARKER_COLOR_NONE = 1 << 0,
CUPTI_ACTIVITY_FLAG_MARKER_COLOR_ARGB = 1 << 1,
CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_SIZE_MASK = 0xFF << 0,
CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_LOAD = 1 << 8,
CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_CACHED = 1 << 9,
CUPTI_ACTIVITY_FLAG_METRIC_OVERFLOWED = 1 << 0,
CUPTI_ACTIVITY_FLAG_METRIC_VALUE_INVALID = 1 << 1,
CUPTI_ACTIVITY_FLAG_INSTRUCTION_VALUE_INVALID = 1 << 0,
CUPTI_ACTIVITY_FLAG_INSTRUCTION_CLASS_MASK = 0xFF << 1,
CUPTI_ACTIVITY_FLAG_FLUSH_FORCED = 1 << 0,
CUPTI_ACTIVITY_FLAG_SHARED_ACCESS_KIND_SIZE_MASK = 0xFF << 0,
CUPTI_ACTIVITY_FLAG_SHARED_ACCESS_KIND_LOAD = 1 << 8,
CUPTI_ACTIVITY_FLAG_MEMSET_ASYNC = 1 << 0,
CUPTI_ACTIVITY_FLAG_THRASHING_IN_CPU = 1 << 0,
CUPTI_ACTIVITY_FLAG_THROTTLING_IN_CPU = 1 << 0
}

| Flags associated with activity records. More...

enum

CUpti_ActivityInstructionClass {
CUPTI_ACTIVITY_INSTRUCTION_CLASS_UNKNOWN = 0,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_32 = 1,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_64 = 2,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_INTEGER = 3,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_BIT_CONVERSION = 4,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_CONTROL_FLOW = 5,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_GLOBAL = 6,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_SHARED = 7,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_LOCAL = 8,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_GENERIC = 9,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_SURFACE = 10,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_CONSTANT = 11,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_TEXTURE = 12,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_GLOBAL_ATOMIC = 13,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_SHARED_ATOMIC = 14,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_SURFACE_ATOMIC = 15,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_INTER_THREAD_COMMUNICATION = 16,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_BARRIER = 17,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_MISCELLANEOUS = 18,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_16 = 19,
CUPTI_ACTIVITY_INSTRUCTION_CLASS_UNIFORM = 20
}

| SASS instruction classification. More...

enum

CUpti_ActivityKind {
CUPTI_ACTIVITY_KIND_INVALID = 0,
CUPTI_ACTIVITY_KIND_MEMCPY = 1,
CUPTI_ACTIVITY_KIND_MEMSET = 2,
CUPTI_ACTIVITY_KIND_KERNEL = 3,
CUPTI_ACTIVITY_KIND_DRIVER = 4,
CUPTI_ACTIVITY_KIND_RUNTIME = 5,
CUPTI_ACTIVITY_KIND_EVENT = 6,
CUPTI_ACTIVITY_KIND_METRIC = 7,
CUPTI_ACTIVITY_KIND_DEVICE = 8,
CUPTI_ACTIVITY_KIND_CONTEXT = 9,
CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL = 10,
CUPTI_ACTIVITY_KIND_NAME = 11,
CUPTI_ACTIVITY_KIND_MARKER = 12,
CUPTI_ACTIVITY_KIND_MARKER_DATA = 13,
CUPTI_ACTIVITY_KIND_SOURCE_LOCATOR = 14,
CUPTI_ACTIVITY_KIND_GLOBAL_ACCESS = 15,
CUPTI_ACTIVITY_KIND_BRANCH = 16,
CUPTI_ACTIVITY_KIND_OVERHEAD = 17,
CUPTI_ACTIVITY_KIND_CDP_KERNEL = 18,
CUPTI_ACTIVITY_KIND_PREEMPTION = 19,
CUPTI_ACTIVITY_KIND_ENVIRONMENT = 20,
CUPTI_ACTIVITY_KIND_EVENT_INSTANCE = 21,
CUPTI_ACTIVITY_KIND_MEMCPY2 = 22,
CUPTI_ACTIVITY_KIND_METRIC_INSTANCE = 23,
CUPTI_ACTIVITY_KIND_INSTRUCTION_EXECUTION = 24,
CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER = 25,
CUPTI_ACTIVITY_KIND_FUNCTION = 26,
CUPTI_ACTIVITY_KIND_MODULE = 27,
CUPTI_ACTIVITY_KIND_DEVICE_ATTRIBUTE = 28,
CUPTI_ACTIVITY_KIND_SHARED_ACCESS = 29,
CUPTI_ACTIVITY_KIND_PC_SAMPLING = 30,
CUPTI_ACTIVITY_KIND_PC_SAMPLING_RECORD_INFO = 31,
CUPTI_ACTIVITY_KIND_INSTRUCTION_CORRELATION = 32,
CUPTI_ACTIVITY_KIND_OPENACC_DATA = 33,
CUPTI_ACTIVITY_KIND_OPENACC_LAUNCH = 34,
CUPTI_ACTIVITY_KIND_OPENACC_OTHER = 35,
CUPTI_ACTIVITY_KIND_CUDA_EVENT = 36,
CUPTI_ACTIVITY_KIND_STREAM = 37,
CUPTI_ACTIVITY_KIND_SYNCHRONIZATION = 38,
CUPTI_ACTIVITY_KIND_EXTERNAL_CORRELATION = 39,
CUPTI_ACTIVITY_KIND_NVLINK = 40,
CUPTI_ACTIVITY_KIND_INSTANTANEOUS_EVENT = 41,
CUPTI_ACTIVITY_KIND_INSTANTANEOUS_EVENT_INSTANCE = 42,
CUPTI_ACTIVITY_KIND_INSTANTANEOUS_METRIC = 43,
CUPTI_ACTIVITY_KIND_INSTANTANEOUS_METRIC_INSTANCE = 44,
CUPTI_ACTIVITY_KIND_MEMORY = 45,
CUPTI_ACTIVITY_KIND_PCIE = 46,
CUPTI_ACTIVITY_KIND_OPENMP = 47,
CUPTI_ACTIVITY_KIND_INTERNAL_LAUNCH_API = 48,
CUPTI_ACTIVITY_KIND_MEMORY2 = 49,
CUPTI_ACTIVITY_KIND_MEMORY_POOL = 50
}

| The kinds of activity records. More...
enum | CUpti_ActivityLaunchType { CUPTI_ACTIVITY_LAUNCH_TYPE_REGULAR = 0, CUPTI_ACTIVITY_LAUNCH_TYPE_COOPERATIVE_SINGLE_DEVICE = 1, CUPTI_ACTIVITY_LAUNCH_TYPE_COOPERATIVE_MULTI_DEVICE = 2 }
| The type of the CUDA kernel launch. More...

enum

CUpti_ActivityMemcpyKind {
CUPTI_ACTIVITY_MEMCPY_KIND_UNKNOWN = 0,
CUPTI_ACTIVITY_MEMCPY_KIND_HTOD = 1,
CUPTI_ACTIVITY_MEMCPY_KIND_DTOH = 2,
CUPTI_ACTIVITY_MEMCPY_KIND_HTOA = 3,
CUPTI_ACTIVITY_MEMCPY_KIND_ATOH = 4,
CUPTI_ACTIVITY_MEMCPY_KIND_ATOA = 5,
CUPTI_ACTIVITY_MEMCPY_KIND_ATOD = 6,
CUPTI_ACTIVITY_MEMCPY_KIND_DTOA = 7,
CUPTI_ACTIVITY_MEMCPY_KIND_DTOD = 8,
CUPTI_ACTIVITY_MEMCPY_KIND_HTOH = 9,
CUPTI_ACTIVITY_MEMCPY_KIND_PTOP = 10
}

| The kind of a memory copy, indicating the source and destination targets of the copy. More...
enum | CUpti_ActivityMemoryKind { CUPTI_ACTIVITY_MEMORY_KIND_UNKNOWN = 0, CUPTI_ACTIVITY_MEMORY_KIND_PAGEABLE = 1, CUPTI_ACTIVITY_MEMORY_KIND_PINNED = 2, CUPTI_ACTIVITY_MEMORY_KIND_DEVICE = 3, CUPTI_ACTIVITY_MEMORY_KIND_ARRAY = 4, CUPTI_ACTIVITY_MEMORY_KIND_MANAGED = 5, CUPTI_ACTIVITY_MEMORY_KIND_DEVICE_STATIC = 6, CUPTI_ACTIVITY_MEMORY_KIND_MANAGED_STATIC = 7 }
| The kinds of memory accessed by a memory operation/copy. More...
enum | CUpti_ActivityMemoryOperationType { , CUPTI_ACTIVITY_MEMORY_OPERATION_TYPE_ALLOCATION = 1, CUPTI_ACTIVITY_MEMORY_OPERATION_TYPE_RELEASE = 2 }
| Memory operation types. More...
enum | CUpti_ActivityMemoryPoolOperationType { , CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_CREATED = 1, CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_DESTROYED = 2, CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_TRIMMED = 3 }
| Memory pool operation types. More...
enum | CUpti_ActivityMemoryPoolType { , CUPTI_ACTIVITY_MEMORY_POOL_TYPE_LOCAL = 1, CUPTI_ACTIVITY_MEMORY_POOL_TYPE_IMPORTED = 2 }
| Memory pool types. More...
enum | CUpti_ActivityObjectKind { CUPTI_ACTIVITY_OBJECT_UNKNOWN = 0, CUPTI_ACTIVITY_OBJECT_PROCESS = 1, CUPTI_ACTIVITY_OBJECT_THREAD = 2, CUPTI_ACTIVITY_OBJECT_DEVICE = 3, CUPTI_ACTIVITY_OBJECT_CONTEXT = 4, CUPTI_ACTIVITY_OBJECT_STREAM = 5 }
| The kinds of activity objects. More...
enum | CUpti_ActivityOverheadKind { CUPTI_ACTIVITY_OVERHEAD_UNKNOWN = 0, CUPTI_ACTIVITY_OVERHEAD_DRIVER_COMPILER = 1, CUPTI_ACTIVITY_OVERHEAD_CUPTI_BUFFER_FLUSH = 1<<16, CUPTI_ACTIVITY_OVERHEAD_CUPTI_INSTRUMENTATION = 2<<16, CUPTI_ACTIVITY_OVERHEAD_CUPTI_RESOURCE = 3<<16 }
| The kinds of activity overhead. More...
enum | CUpti_ActivityPartitionedGlobalCacheConfig { CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_UNKNOWN = 0, CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_NOT_SUPPORTED = 1, CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_OFF = 2, CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_ON = 3 }
| Partitioned global caching option. More...
enum | CUpti_ActivityPCSamplingPeriod { CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_INVALID = 0, CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MIN = 1, CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_LOW = 2, CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MID = 3, CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_HIGH = 4, CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MAX = 5 }
| Sampling period for PC sampling method. More...

enum

CUpti_ActivityPCSamplingStallReason {
CUPTI_ACTIVITY_PC_SAMPLING_STALL_INVALID = 0,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_NONE = 1,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_INST_FETCH = 2,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_EXEC_DEPENDENCY = 3,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_MEMORY_DEPENDENCY = 4,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_TEXTURE = 5,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_SYNC = 6,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_CONSTANT_MEMORY_DEPENDENCY = 7,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_PIPE_BUSY = 8,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_MEMORY_THROTTLE = 9,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_NOT_SELECTED = 10,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_OTHER = 11,
CUPTI_ACTIVITY_PC_SAMPLING_STALL_SLEEPING = 12
}

| The stall reason for PC sampling activity. More...
enum | CUpti_ActivityPreemptionKind { CUPTI_ACTIVITY_PREEMPTION_KIND_UNKNOWN = 0, CUPTI_ACTIVITY_PREEMPTION_KIND_SAVE = 1, CUPTI_ACTIVITY_PREEMPTION_KIND_RESTORE = 2 }
| The kind of a preemption activity. More...
enum | CUpti_ActivityStreamFlag { CUPTI_ACTIVITY_STREAM_CREATE_FLAG_UNKNOWN = 0, CUPTI_ACTIVITY_STREAM_CREATE_FLAG_DEFAULT = 1, CUPTI_ACTIVITY_STREAM_CREATE_FLAG_NON_BLOCKING = 2, CUPTI_ACTIVITY_STREAM_CREATE_FLAG_NULL = 3, CUPTI_ACTIVITY_STREAM_CREATE_MASK = 0xFFFF }
| stream type. More...
enum | CUpti_ActivitySynchronizationType { CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_UNKNOWN = 0, CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_EVENT_SYNCHRONIZE = 1, CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_STREAM_WAIT_EVENT = 2, CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_STREAM_SYNCHRONIZE = 3, CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_CONTEXT_SYNCHRONIZE = 4 }
| Synchronization type. More...
enum | CUpti_ActivityThreadIdType { CUPTI_ACTIVITY_THREAD_ID_TYPE_DEFAULT = 0, CUPTI_ACTIVITY_THREAD_ID_TYPE_SYSTEM = 1 }
| Thread-Id types. More...
enum | CUpti_ActivityUnifiedMemoryAccessType { CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_UNKNOWN = 0, CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_READ = 1, CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_WRITE = 2, CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_ATOMIC = 3, CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_PREFETCH = 4 }
| Memory access type for unified memory page faults. More...

enum

CUpti_ActivityUnifiedMemoryCounterKind {
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_UNKNOWN = 0,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD = 1,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH = 2,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT = 3,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT = 4,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING = 5,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING = 6,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP = 7,
CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOD = 8
}

| Kind of the Unified Memory counter. More...
enum | CUpti_ActivityUnifiedMemoryCounterScope { CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_UNKNOWN = 0, CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_PROCESS_SINGLE_DEVICE = 1, CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_PROCESS_ALL_DEVICES = 2 }
| Scope of the unified memory counter (deprecated in CUDA 7.0). More...

enum

CUpti_ActivityUnifiedMemoryMigrationCause {
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_UNKNOWN = 0,
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_USER = 1,
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_COHERENCE = 2,
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_PREFETCH = 3,
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_EVICTION = 4,
CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_ACCESS_COUNTERS = 5
}

| Migration cause of the Unified Memory counter. More...

enum

CUpti_ActivityUnifiedMemoryRemoteMapCause {
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_UNKNOWN = 0,
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_COHERENCE = 1,
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_THRASHING = 2,
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_POLICY = 3,
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_OUT_OF_MEMORY = 4,
CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_EVICTION = 5
}

| Remote memory map cause of the Unified Memory counter. More...
enum | CUpti_DeviceVirtualizationMode { CUPTI_DEVICE_VIRTUALIZATION_MODE_NONE = 0, CUPTI_DEVICE_VIRTUALIZATION_MODE_PASS_THROUGH = 1, CUPTI_DEVICE_VIRTUALIZATION_MODE_VIRTUAL_GPU = 2 }
enum | CUpti_DevType { , CUPTI_DEV_TYPE_GPU = 1, CUPTI_DEV_TYPE_NPU = 2 }
| The device type for device connected to NVLink. More...

enum

CUpti_EnvironmentClocksThrottleReason {
CUPTI_CLOCKS_THROTTLE_REASON_GPU_IDLE = 0x00000001,
CUPTI_CLOCKS_THROTTLE_REASON_USER_DEFINED_CLOCKS = 0x00000002,
CUPTI_CLOCKS_THROTTLE_REASON_SW_POWER_CAP = 0x00000004,
CUPTI_CLOCKS_THROTTLE_REASON_HW_SLOWDOWN = 0x00000008,
CUPTI_CLOCKS_THROTTLE_REASON_UNKNOWN = 0x80000000,
CUPTI_CLOCKS_THROTTLE_REASON_UNSUPPORTED = 0x40000000,
CUPTI_CLOCKS_THROTTLE_REASON_NONE = 0x00000000
}

| Reasons for clock throttling. More...
enum | CUpti_ExternalCorrelationKind { , CUPTI_EXTERNAL_CORRELATION_KIND_UNKNOWN = 1, CUPTI_EXTERNAL_CORRELATION_KIND_OPENACC = 2, CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM0 = 3, CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM1 = 4, CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM2 = 5, CUPTI_EXTERNAL_CORRELATION_KIND_SIZE }
| The kind of external APIs supported for correlation. More...
enum | CUpti_FuncShmemLimitConfig
| The shared memory limit per block config for a kernel This should be used to set 'cudaOccFuncShmemConfig' field in occupancy calculator API.
enum | CUpti_LinkFlag { , CUPTI_LINK_FLAG_PEER_ACCESS = (1 << 1), CUPTI_LINK_FLAG_SYSMEM_ACCESS = (1 << 2), CUPTI_LINK_FLAG_PEER_ATOMICS = (1 << 3), CUPTI_LINK_FLAG_SYSMEM_ATOMICS = (1 << 4) }
| Link flags. More...
enum | CUpti_OpenAccConstructKind
| The OpenAcc parent construct kind for OpenAcc activity records.
enum | CUpti_OpenAccEventKind
| The OpenAcc event kind for OpenAcc activity records. More...
enum | CUpti_PcieDeviceType { CUPTI_PCIE_DEVICE_TYPE_GPU = 0, CUPTI_PCIE_DEVICE_TYPE_BRIDGE = 1 }
enum | CUpti_PcieGen { CUPTI_PCIE_GEN_GEN1 = 1, CUPTI_PCIE_GEN_GEN2 = 2, CUPTI_PCIE_GEN_GEN3 = 3, CUPTI_PCIE_GEN_GEN4 = 4, CUPTI_PCIE_GEN_GEN5 = 5 }
| PCIE Generation. More...

## Functions

CUptiResult | cuptiActivityConfigurePCSampling (CUcontext ctx, CUpti_ActivityPCSamplingConfig *config)
| Set PC sampling configuration.
CUptiResult | cuptiActivityConfigureUnifiedMemoryCounter (CUpti_ActivityUnifiedMemoryCounterConfig *config, uint32_t count)
| Set Unified Memory Counter configuration.
CUptiResult | cuptiActivityDisable (CUpti_ActivityKind kind)
| Disable collection of a specific kind of activity record.
CUptiResult | cuptiActivityDisableContext (CUcontext context, CUpti_ActivityKind kind)
| Disable collection of a specific kind of activity record for a context.
CUptiResult | cuptiActivityEnable (CUpti_ActivityKind kind)
| Enable collection of a specific kind of activity record.
CUptiResult | cuptiActivityEnableContext (CUcontext context, CUpti_ActivityKind kind)
| Enable collection of a specific kind of activity record for a context.
CUptiResult | cuptiActivityEnableLatencyTimestamps (uint8_t enable)
| Controls the collection of queued and submitted timestamps for kernels.
CUptiResult | cuptiActivityEnableLaunchAttributes (uint8_t enable)
| Controls the collection of launch attributes for kernels.
CUptiResult | cuptiActivityFlush (CUcontext context, uint32_t streamId, uint32_t flag)
| Wait for all activity records to be delivered via the completion callback.
CUptiResult | cuptiActivityFlushAll (uint32_t flag)
| Request to deliver activity records via the buffer completion callback.
CUptiResult | cuptiActivityFlushPeriod (uint32_t time)
| Sets the flush period for the worker thread.
CUptiResult | cuptiActivityGetAttribute (CUpti_ActivityAttribute attr, size_t *valueSize, void *value)
| Read an activity API attribute.
CUptiResult | cuptiActivityGetNextRecord (uint8_t *buffer, size_t validBufferSizeBytes, CUpti_Activity **record)
| Iterate over the activity records in a buffer.
CUptiResult | cuptiActivityGetNumDroppedRecords (CUcontext context, uint32_t streamId, size_t *dropped)
| Get the number of activity records that were dropped of insufficient buffer space.
CUptiResult | cuptiActivityPopExternalCorrelationId (CUpti_ExternalCorrelationKind kind, uint64_t *lastId)
| Pop an external correlation id for the calling thread.
CUptiResult | cuptiActivityPushExternalCorrelationId (CUpti_ExternalCorrelationKind kind, uint64_t id)
| Push an external correlation id for the calling thread.
CUptiResult | cuptiActivityRegisterCallbacks (CUpti_BuffersCallbackRequestFunc funcBufferRequested, CUpti_BuffersCallbackCompleteFunc funcBufferCompleted)
| Registers callback functions with CUPTI for activity buffer handling.
CUptiResult | cuptiActivityRegisterTimestampCallback (CUpti_TimestampCallbackFunc funcTimestamp)
| Registers callback function with CUPTI for providing timestamp.
CUptiResult | cuptiActivitySetAttribute (CUpti_ActivityAttribute attr, size_t *valueSize, void *value)
| Write an activity API attribute.
CUptiResult | cuptiComputeCapabilitySupported (int major, int minor, int *support)
| Check support for a compute capability.
CUptiResult | cuptiDeviceSupported (CUdevice dev, int *support)
| Check support for a compute device.
CUptiResult | cuptiDeviceVirtualizationMode (CUdevice dev, CUpti_DeviceVirtualizationMode *mode)
| Query the virtualization mode of the device.
CUptiResult | cuptiFinalize (void)
| Detach CUPTI from the running process.
CUptiResult | cuptiGetAutoBoostState (CUcontext context, CUpti_ActivityAutoBoostState *state)
| Get auto boost state.
CUptiResult | cuptiGetContextId (CUcontext context, uint32_t *contextId)
| Get the ID of a context.
CUptiResult | cuptiGetDeviceId (CUcontext context, uint32_t *deviceId)
| Get the ID of a device.
CUptiResult | cuptiGetGraphId (CUgraph graph, uint32_t *pId)
| Get the unique ID of graph.
CUptiResult | cuptiGetGraphNodeId (CUgraphNode node, uint64_t *nodeId)
| Get the unique ID of a graph node.
CUptiResult | cuptiGetLastError (void)
| Returns the last error from a cupti call or callback.
CUptiResult | cuptiGetStreamId (CUcontext context, CUstream stream, uint32_t *streamId)
| Get the ID of a stream.
CUptiResult | cuptiGetStreamIdEx (CUcontext context, CUstream stream, uint8_t perThreadStream, uint32_t *streamId)
| Get the ID of a stream.
CUptiResult | cuptiGetThreadIdType (CUpti_ActivityThreadIdType *type)
| Get the thread-id type.
CUptiResult | cuptiGetTimestamp (uint64_t *timestamp)
| Get the CUPTI timestamp.
CUptiResult | cuptiSetThreadIdType (CUpti_ActivityThreadIdType type)
| Set the thread-id type.

## Detailed Description

Functions, types, and enums that implement the CUPTI Activity API.

## Define Documentation

#define CUPTI_AUTO_BOOST_INVALID_CLIENT_PID 0

An invalid/unknown process id.

#define CUPTI_CORRELATION_ID_UNKNOWN 0

An invalid/unknown correlation ID. A correlation ID of this value indicates that there is no correlation for the activity record.

#define CUPTI_FUNCTION_INDEX_ID_INVALID 0

An invalid function index ID.

#define CUPTI_GRID_ID_UNKNOWN 0LL

An invalid/unknown grid ID.

#define CUPTI_MAX_NVLINK_PORTS 32

Maximum NVLink port numbers.

#define CUPTI_NVLINK_INVALID_PORT -1

Invalid/unknown NVLink port number.

#define CUPTI_SOURCE_LOCATOR_ID_UNKNOWN 0

The source-locator ID that indicates an unknown source location. There is not an actual CUpti_ActivitySourceLocator object corresponding to this value.

#define CUPTI_SYNCHRONIZATION_INVALID_VALUE -1

An invalid/unknown value.

#define CUPTI_TIMESTAMP_UNKNOWN 0LL

An invalid/unknown timestamp for a start, end, queued, submitted, or completed time.

## Typedef Documentation

typedef void( * CUpti_BuffersCallbackCompleteFunc)(CUcontext context, uint32_t streamId, uint8_t *buffer, size_t size, size_t validSize)

This callback function returns to the CUPTI client a buffer containing activity records. The buffer contains `validSize` bytes of activity records which should be read using cuptiActivityGetNextRecord. The number of dropped records can be read using cuptiActivityGetNumDroppedRecords. After this call CUPTI relinquished ownership of the buffer and will not use it anymore. The client may return the buffer to CUPTI using the CUpti_BuffersCallbackRequestFunc callback. Note: CUDA 6.0 onwards, all buffers returned by this callback are global buffers i.e. there is no context/stream specific buffer. User needs to parse the global buffer to extract the context/stream specific activity records.

Parameters:

  | context | The context this buffer is associated with. If NULL, the buffer is associated with the global activities. This field is deprecated as of CUDA 6.0 and will always be NULL.
  | streamId | The stream id this buffer is associated with. This field is deprecated as of CUDA 6.0 and will always be NULL.
  | buffer | The activity record buffer.
  | size | The total size of the buffer in bytes as set in CUpti_BuffersCallbackRequestFunc.
  | validSize | The number of valid bytes in the buffer.

typedef void( * CUpti_BuffersCallbackRequestFunc)(uint8_t **buffer, size_t *size, size_t *maxNumRecords)

This callback function signals the CUPTI client that an activity buffer is needed by CUPTI. The activity buffer is used by CUPTI to store activity records. The callback function can decline the request by setting `*buffer` to NULL. In this case CUPTI may drop activity records.

Parameters:

  | buffer | Returns the new buffer. If set to NULL then no buffer is returned.
  | size | Returns the size of the returned buffer.
  | maxNumRecords | Returns the maximum number of records that should be placed in the buffer. If 0 then the buffer is filled with as many records as possible. If > 0 the buffer is filled with at most that many records before it is returned.

typedef uint64_t( * CUpti_TimestampCallbackFunc)(void)

This callback function signals the CUPTI client that a timestamp needs to be returned. This timestamp would be treated as normalized timestamp to be used for various purposes in CUPTI. For example to store start and end timestamps reported in the CUPTI activity records. The returned timestamp must be in nanoseconds.

See also:
  cuptiActivityRegisterTimestampCallback

## Enumeration Type Documentation

enum CUpti_ActivityAttribute

These attributes are used to control the behavior of the activity API.

Enumerator:

  CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE

  The device memory size (in bytes) reserved for storing profiling data for concurrent kernels (activity kind CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL), memcopies and memsets for each buffer on a context. The value is a size_t.

  There is a limit on how many device buffers can be allocated per context. User can query and set this limit using the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_POOL_LIMIT. CUPTI doesn't pre-allocate all the buffers, it pre-allocates only those many buffers as set by the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_PRE_ALLOCATE_VALUE. When all of the data in a buffer is consumed, it is added in the reuse pool, and CUPTI picks a buffer from this pool when a new buffer is needed. Thus memory footprint does not scale with the kernel count. Applications with the high density of kernels, memcopies and memsets might result in having CUPTI to allocate more device buffers. CUPTI allocates another buffer only when it runs out of the buffers in the reuse pool.

  Since buffer allocation happens in the main application thread, this might result in stalls in the critical path. CUPTI pre-allocates 3 buffers of the same size to mitigate this issue. User can query and set the pre-allocation limit using the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_PRE_ALLOCATE_VALUE.

  Having larger buffer size leaves less device memory for the application. Having smaller buffer size increases the risk of dropping timestamps for records if too many kernels or memcopies or memsets are launched at one time.

  This value only applies to new buffer allocations. Set this value before initializing CUDA or before creating a context to ensure it is considered for the following allocations.

  The default value is 3200000 (~3MB) which can accommodate profiling data up to 100,000 kernels, memcopies and memsets combined.

  Note: Starting with the CUDA 11.2 release, CUPTI allocates profiling buffer in the pinned host memory by default as this might help in improving the performance of the tracing run. Refer to the description of the attribute CUPTI_ACTIVITY_ATTR_MEM_ALLOCATION_TYPE_HOST_PINNED for more details. Size of the memory and maximum number of pools are still controlled by the attributes CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE and CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_POOL_LIMIT.

  Note: The actual amount of device memory per buffer reserved by CUPTI might be larger.

  CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE_CDP

  The device memory size (in bytes) reserved for storing profiling data for CDP operations for each buffer on a context. The value is a size_t.

  Having larger buffer size means less flush operations but consumes more device memory. This value only applies to new allocations.

  Set this value before initializing CUDA or before creating a context to ensure it is considered for the following allocations.

  The default value is 8388608 (8MB).

  Note: The actual amount of device memory per context reserved by CUPTI might be larger.

  CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_POOL_LIMIT

  The maximum number of device memory buffers per context. The value is a size_t.

  For an application with high rate of kernel launches, memcopies and memsets having a bigger pool limit helps in timestamp collection for all these activties at the expense of a larger memory footprint. Refer to the description of the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE for more details.

  Setting this value will not modify the number of memory buffers currently stored.

  Set this value before initializing CUDA to ensure the limit is not exceeded.

  The default value is 250.

  CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_SIZE

  The profiling semaphore pool size reserved for storing profiling data for serialized kernels tracing (activity kind CUPTI_ACTIVITY_KIND_KERNEL) for each context. The value is a size_t.

  There is a limit on how many semaphore pools can be allocated per context. User can query and set this limit using the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_LIMIT. CUPTI doesn't pre-allocate all the semaphore pools, it pre-allocates only those many semaphore pools as set by the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_PRE_ALLOCATE_VALUE. When all of the data in a semaphore pool is consumed, it is added in the reuse pool, and CUPTI picks a semaphore pool from the reuse pool when a new semaphore pool is needed. Thus memory footprint does not scale with the kernel count. Applications with the high density of kernels might result in having CUPTI to allocate more semaphore pools. CUPTI allocates another semaphore pool only when it runs out of the semaphore pools in the reuse pool.

  Since semaphore pool allocation happens in the main application thread, this might result in stalls in the critical path. CUPTI pre-allocates 3 semaphore pools of the same size to mitigate this issue. User can query and set the pre-allocation limit using the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_PRE_ALLOCATE_VALUE.

  Having larger semaphore pool size leaves less device memory for the application. Having smaller semaphore pool size increases the risk of dropping timestamps for kernel records if too many kernels are issued/launched at one time.

  This value only applies to new semaphore pool allocations. Set this value before initializing CUDA or before creating a context to ensure it is considered for the following allocations.

  The default value is 25000 which can accommodate profiling data for upto 25,000 kernels.

  CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_LIMIT

  The maximum number of profiling semaphore pools per context. The value is a size_t.

  For an application with high rate of kernel launches, having a bigger pool limit helps in timestamp collection for all the kernels, at the expense of a larger device memory footprint. Refer to the description of the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_SIZE for more details.

  Set this value before initializing CUDA to ensure the limit is not exceeded.

  The default value is 250.

  CUPTI_ACTIVITY_ATTR_ZEROED_OUT_ACTIVITY_BUFFER

  The flag to indicate whether user should provide activity buffer of zero value. The value is a uint8_t.

  If the value of this attribute is non-zero, user should provide a zero value buffer in the CUpti_BuffersCallbackRequestFunc. If the user does not provide a zero value buffer after setting this to non-zero, the activity buffer may contain some uninitialized values when CUPTI returns it in CUpti_BuffersCallbackCompleteFunc

  If the value of this attribute is zero, CUPTI will initialize the user buffer received in the CUpti_BuffersCallbackRequestFunc to zero before filling it. If the user sets this to zero, a few stalls may appear in critical path because CUPTI will zero out the buffer in the main thread. Set this value before returning from CUpti_BuffersCallbackRequestFunc to ensure it is considered for all the subsequent user buffers.

  The default value is 0.

  CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_PRE_ALLOCATE_VALUE

  Number of device buffers to pre-allocate for a context during the initialization phase. The value is a size_t.

  Refer to the description of the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE for details.

  This value must be less than the maximum number of device buffers set using the attribute CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_POOL_LIMIT

  Set this value before initializing CUDA or before creating a context to ensure it is considered by the CUPTI.

  The default value is set to 3 to ping pong between these buffers (if possible).

  CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_PRE_ALLOCATE_VALUE

  Number of profiling semaphore pools to pre-allocate for a context during the initialization phase. The value is a size_t.

  Refer to the description of the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_SIZE for details.

  This value must be less than the maximum number of profiling semaphore pools set using the attribute CUPTI_ACTIVITY_ATTR_PROFILING_SEMAPHORE_POOL_LIMIT

  Set this value before initializing CUDA or before creating a context to ensure it is considered by the CUPTI.

  The default value is set to 3 to ping pong between these pools (if possible).

  CUPTI_ACTIVITY_ATTR_MEM_ALLOCATION_TYPE_HOST_PINNED

  Allocate page-locked (pinned) host memory for storing profiling data for concurrent kernels, memcopies and memsets for each buffer on a context. The value is a uint8_t.

  Starting with the CUDA 11.2 release, CUPTI allocates profiling buffer in the pinned host memory by default as this might help in improving the performance of the tracing run. Allocating excessive amounts of pinned memory may degrade system performance, since it reduces the amount of memory available to the system for paging. For this reason user might want to change the location from pinned host memory to device memory by setting value of this attribute to 0.

  The default value is 1.

enum CUpti_ActivityComputeApiKind

Enumerator:

  CUPTI_ACTIVITY_COMPUTE_API_UNKNOWN | The compute API is not known.
  CUPTI_ACTIVITY_COMPUTE_API_CUDA | The compute APIs are for CUDA.
  CUPTI_ACTIVITY_COMPUTE_API_CUDA_MPS | The compute APIs are for CUDA running in MPS (Multi-Process Service) environment.

enum CUpti_ActivityEnvironmentKind

Enumerator:

  CUPTI_ACTIVITY_ENVIRONMENT_UNKNOWN | Unknown data.
  CUPTI_ACTIVITY_ENVIRONMENT_SPEED | The environment data is related to speed.
  CUPTI_ACTIVITY_ENVIRONMENT_TEMPERATURE | The environment data is related to temperature.
  CUPTI_ACTIVITY_ENVIRONMENT_POWER | The environment data is related to power.
  CUPTI_ACTIVITY_ENVIRONMENT_COOLING | The environment data is related to cooling.

enum CUpti_ActivityFlag

Activity record flags. Flags can be combined by bitwise OR to associated multiple flags with an activity record. Each flag is specific to a certain activity kind, as noted below.

Enumerator:

  CUPTI_ACTIVITY_FLAG_NONE | Indicates the activity record has no flags.
  CUPTI_ACTIVITY_FLAG_DEVICE_CONCURRENT_KERNELS | Indicates the activity represents a device that supports concurrent kernel execution. Valid for CUPTI_ACTIVITY_KIND_DEVICE.
  CUPTI_ACTIVITY_FLAG_DEVICE_ATTRIBUTE_CUDEVICE | Indicates if the activity represents a CUdevice_attribute value or a CUpti_DeviceAttribute value. Valid for CUPTI_ACTIVITY_KIND_DEVICE_ATTRIBUTE.
  CUPTI_ACTIVITY_FLAG_MEMCPY_ASYNC | Indicates the activity represents an asynchronous memcpy operation. Valid for CUPTI_ACTIVITY_KIND_MEMCPY.
  CUPTI_ACTIVITY_FLAG_MARKER_INSTANTANEOUS | Indicates the activity represents an instantaneous marker. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_START | Indicates the activity represents a region start marker. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_END | Indicates the activity represents a region end marker. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE | Indicates the activity represents an attempt to acquire a user defined synchronization object. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE_SUCCESS | Indicates the activity represents success in acquiring the user defined synchronization object. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_SYNC_ACQUIRE_FAILED | Indicates the activity represents failure in acquiring the user defined synchronization object. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_SYNC_RELEASE | Indicates the activity represents releasing a reservation on user defined synchronization object. Valid for CUPTI_ACTIVITY_KIND_MARKER.
  CUPTI_ACTIVITY_FLAG_MARKER_COLOR_NONE | Indicates the activity represents a marker that does not specify a color. Valid for CUPTI_ACTIVITY_KIND_MARKER_DATA.
  CUPTI_ACTIVITY_FLAG_MARKER_COLOR_ARGB | Indicates the activity represents a marker that specifies a color in alpha-red-green-blue format. Valid for CUPTI_ACTIVITY_KIND_MARKER_DATA.
  CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_SIZE_MASK | The number of bytes requested by each thread Valid for CUpti_ActivityGlobalAccess3.
  CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_LOAD | If bit in this flag is set, the access was load, else it is a store access. Valid for CUpti_ActivityGlobalAccess3.
  CUPTI_ACTIVITY_FLAG_GLOBAL_ACCESS_KIND_CACHED | If this bit in flag is set, the load access was cached else it is uncached. Valid for CUpti_ActivityGlobalAccess3.
  CUPTI_ACTIVITY_FLAG_METRIC_OVERFLOWED | If this bit in flag is set, the metric value overflowed. Valid for CUpti_ActivityMetric and CUpti_ActivityMetricInstance.
  CUPTI_ACTIVITY_FLAG_METRIC_VALUE_INVALID | If this bit in flag is set, the metric value couldn't be calculated. This occurs when a value(s) required to calculate the metric is missing. Valid for CUpti_ActivityMetric and CUpti_ActivityMetricInstance.
  CUPTI_ACTIVITY_FLAG_INSTRUCTION_VALUE_INVALID | If this bit in flag is set, the source level metric value couldn't be calculated. This occurs when a value(s) required to calculate the source level metric cannot be evaluated. Valid for CUpti_ActivityInstructionExecution.
  CUPTI_ACTIVITY_FLAG_INSTRUCTION_CLASS_MASK | The mask for the instruction class, CUpti_ActivityInstructionClass Valid for CUpti_ActivityInstructionExecution and CUpti_ActivityInstructionCorrelation
  CUPTI_ACTIVITY_FLAG_FLUSH_FORCED | When calling cuptiActivityFlushAll, this flag can be set to force CUPTI to flush all records in the buffer, whether finished or not
  CUPTI_ACTIVITY_FLAG_SHARED_ACCESS_KIND_SIZE_MASK | The number of bytes requested by each thread Valid for CUpti_ActivitySharedAccess.
  CUPTI_ACTIVITY_FLAG_SHARED_ACCESS_KIND_LOAD | If bit in this flag is set, the access was load, else it is a store access. Valid for CUpti_ActivitySharedAccess.
  CUPTI_ACTIVITY_FLAG_MEMSET_ASYNC | Indicates the activity represents an asynchronous memset operation. Valid for CUPTI_ACTIVITY_KIND_MEMSET.
  CUPTI_ACTIVITY_FLAG_THRASHING_IN_CPU | Indicates the activity represents thrashing in CPU. Valid for counter of kind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING in CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER
  CUPTI_ACTIVITY_FLAG_THROTTLING_IN_CPU | Indicates the activity represents page throttling in CPU. Valid for counter of kind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING in CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER

enum CUpti_ActivityInstructionClass

The sass instruction are broadly divided into different class. Each enum represents a classification.

Enumerator:

  CUPTI_ACTIVITY_INSTRUCTION_CLASS_UNKNOWN | The instruction class is not known.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_32 | Represents a 32 bit floating point operation.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_64 | Represents a 64 bit floating point operation.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_INTEGER | Represents an integer operation.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_BIT_CONVERSION | Represents a bit conversion operation.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_CONTROL_FLOW | Represents a control flow instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_GLOBAL | Represents a global load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_SHARED | Represents a shared load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_LOCAL | Represents a local load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_GENERIC | Represents a generic load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_SURFACE | Represents a surface load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_CONSTANT | Represents a constant load instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_TEXTURE | Represents a texture load-store instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_GLOBAL_ATOMIC | Represents a global atomic instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_SHARED_ATOMIC | Represents a shared atomic instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_SURFACE_ATOMIC | Represents a surface atomic instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_INTER_THREAD_COMMUNICATION | Represents a inter-thread communication instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_BARRIER | Represents a barrier instruction.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_MISCELLANEOUS | Represents some miscellaneous instructions which do not fit in the above classification.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_FP_16 | Represents a 16 bit floating point operation.
  CUPTI_ACTIVITY_INSTRUCTION_CLASS_UNIFORM | Represents uniform instruction.

enum CUpti_ActivityKind

Each activity record kind represents information about a GPU or an activity occurring on a CPU or GPU. Each kind is associated with a activity record structure that holds the information associated with the kind.

See also:
  CUpti_Activity

  CUpti_ActivityAPI

  CUpti_ActivityContext

  CUpti_ActivityDevice

  CUpti_ActivityDevice2

  CUpti_ActivityDevice3

  CUpti_ActivityDevice4

  CUpti_ActivityDeviceAttribute

  CUpti_ActivityEvent

  CUpti_ActivityEventInstance

  CUpti_ActivityKernel

  CUpti_ActivityKernel2

  CUpti_ActivityKernel3

  CUpti_ActivityKernel4

  CUpti_ActivityKernel5

  CUpti_ActivityKernel6

  CUpti_ActivityKernel7

  CUpti_ActivityCdpKernel

  CUpti_ActivityPreemption

  CUpti_ActivityMemcpy

  CUpti_ActivityMemcpy3

  CUpti_ActivityMemcpy4

  CUpti_ActivityMemcpy5

  CUpti_ActivityMemcpyPtoP

  CUpti_ActivityMemcpyPtoP2

  CUpti_ActivityMemcpyPtoP3

  CUpti_ActivityMemcpyPtoP4

  CUpti_ActivityMemset

  CUpti_ActivityMemset2

  CUpti_ActivityMemset3

  CUpti_ActivityMemset4

  CUpti_ActivityMetric

  CUpti_ActivityMetricInstance

  CUpti_ActivityName

  CUpti_ActivityMarker

  CUpti_ActivityMarker2

  CUpti_ActivityMarkerData

  CUpti_ActivitySourceLocator

  CUpti_ActivityGlobalAccess

  CUpti_ActivityGlobalAccess2

  CUpti_ActivityGlobalAccess3

  CUpti_ActivityBranch

  CUpti_ActivityBranch2

  CUpti_ActivityOverhead

  CUpti_ActivityEnvironment

  CUpti_ActivityInstructionExecution

  CUpti_ActivityUnifiedMemoryCounter

  CUpti_ActivityFunction

  CUpti_ActivityModule

  CUpti_ActivitySharedAccess

  CUpti_ActivityPCSampling

  CUpti_ActivityPCSampling2

  CUpti_ActivityPCSampling3

  CUpti_ActivityPCSamplingRecordInfo

  CUpti_ActivityCudaEvent

  CUpti_ActivityStream

  CUpti_ActivitySynchronization

  CUpti_ActivityInstructionCorrelation

  CUpti_ActivityExternalCorrelation

  CUpti_ActivityUnifiedMemoryCounter2

  CUpti_ActivityOpenAccData

  CUpti_ActivityOpenAccLaunch

  CUpti_ActivityOpenAccOther

  CUpti_ActivityOpenMp

  CUpti_ActivityNvLink

  CUpti_ActivityNvLink2

  CUpti_ActivityNvLink3

  CUpti_ActivityNvLink4

  CUpti_ActivityMemory

  CUpti_ActivityPcie

Enumerator:

  CUPTI_ACTIVITY_KIND_INVALID | The activity record is invalid.
  CUPTI_ACTIVITY_KIND_MEMCPY | A host<->host, host<->device, or device<->device memory copy. The corresponding activity record structure is CUpti_ActivityMemcpy5.
  CUPTI_ACTIVITY_KIND_MEMSET | A memory set executing on the GPU. The corresponding activity record structure is CUpti_ActivityMemset4.
  CUPTI_ACTIVITY_KIND_KERNEL | A kernel executing on the GPU. This activity kind may significantly change the overall performance characteristics of the application because all kernel executions are serialized on the GPU. Other activity kind for kernel CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL doesn't break kernel concurrency. The corresponding activity record structure is CUpti_ActivityKernel7.
  CUPTI_ACTIVITY_KIND_DRIVER | A CUDA driver API function execution. The corresponding activity record structure is CUpti_ActivityAPI.
  CUPTI_ACTIVITY_KIND_RUNTIME | A CUDA runtime API function execution. The corresponding activity record structure is CUpti_ActivityAPI.
  CUPTI_ACTIVITY_KIND_EVENT | An event value. The corresponding activity record structure is CUpti_ActivityEvent.
  CUPTI_ACTIVITY_KIND_METRIC | A metric value. The corresponding activity record structure is CUpti_ActivityMetric.
  CUPTI_ACTIVITY_KIND_DEVICE | Information about a device. The corresponding activity record structure is CUpti_ActivityDevice4.
  CUPTI_ACTIVITY_KIND_CONTEXT | Information about a context. The corresponding activity record structure is CUpti_ActivityContext.
  CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL | A kernel executing on the GPU. This activity kind doesn't break kernel concurrency. The corresponding activity record structure is CUpti_ActivityKernel7.
  CUPTI_ACTIVITY_KIND_NAME | Resource naming done via NVTX APIs for thread, device, context, etc. The corresponding activity record structure is CUpti_ActivityName.
  CUPTI_ACTIVITY_KIND_MARKER | Instantaneous, start, or end NVTX marker. The corresponding activity record structure is CUpti_ActivityMarker2.
  CUPTI_ACTIVITY_KIND_MARKER_DATA | Extended, optional, data about a marker. The corresponding activity record structure is CUpti_ActivityMarkerData.
  CUPTI_ACTIVITY_KIND_SOURCE_LOCATOR | Source information about source level result. The corresponding activity record structure is CUpti_ActivitySourceLocator.
  CUPTI_ACTIVITY_KIND_GLOBAL_ACCESS | Results for source-level global acccess. The corresponding activity record structure is CUpti_ActivityGlobalAccess3.
  CUPTI_ACTIVITY_KIND_BRANCH | Results for source-level branch. The corresponding activity record structure is CUpti_ActivityBranch2.
  CUPTI_ACTIVITY_KIND_OVERHEAD | Overhead activity records. The corresponding activity record structure is CUpti_ActivityOverhead.
  CUPTI_ACTIVITY_KIND_CDP_KERNEL | A CDP (CUDA Dynamic Parallel) kernel executing on the GPU. The corresponding activity record structure is CUpti_ActivityCdpKernel. This activity can not be directly enabled or disabled. It is enabled and disabled through concurrent kernel activity i.e. _CONCURRENT_KERNEL.
  CUPTI_ACTIVITY_KIND_PREEMPTION | Preemption activity record indicating a preemption of a CDP (CUDA Dynamic Parallel) kernel executing on the GPU. The corresponding activity record structure is CUpti_ActivityPreemption.
  CUPTI_ACTIVITY_KIND_ENVIRONMENT | Environment activity records indicating power, clock, thermal, etc. levels of the GPU. The corresponding activity record structure is CUpti_ActivityEnvironment.
  CUPTI_ACTIVITY_KIND_EVENT_INSTANCE | An event value associated with a specific event domain instance. The corresponding activity record structure is CUpti_ActivityEventInstance.
  CUPTI_ACTIVITY_KIND_MEMCPY2 | A peer to peer memory copy. The corresponding activity record structure is CUpti_ActivityMemcpyPtoP4.
  CUPTI_ACTIVITY_KIND_METRIC_INSTANCE | A metric value associated with a specific metric domain instance. The corresponding activity record structure is CUpti_ActivityMetricInstance.
  CUPTI_ACTIVITY_KIND_INSTRUCTION_EXECUTION | Results for source-level instruction execution. The corresponding activity record structure is CUpti_ActivityInstructionExecution.
  CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER | Unified Memory counter record. The corresponding activity record structure is CUpti_ActivityUnifiedMemoryCounter2.
  CUPTI_ACTIVITY_KIND_FUNCTION | Device global/function record. The corresponding activity record structure is CUpti_ActivityFunction.
  CUPTI_ACTIVITY_KIND_MODULE | CUDA Module record. The corresponding activity record structure is CUpti_ActivityModule.
  CUPTI_ACTIVITY_KIND_DEVICE_ATTRIBUTE | A device attribute value. The corresponding activity record structure is CUpti_ActivityDeviceAttribute.
  CUPTI_ACTIVITY_KIND_SHARED_ACCESS | Results for source-level shared acccess. The corresponding activity record structure is CUpti_ActivitySharedAccess.
  CUPTI_ACTIVITY_KIND_PC_SAMPLING | Enable PC sampling for kernels. This will serialize kernels. The corresponding activity record structure is CUpti_ActivityPCSampling3.
  CUPTI_ACTIVITY_KIND_PC_SAMPLING_RECORD_INFO | Summary information about PC sampling records. The corresponding activity record structure is CUpti_ActivityPCSamplingRecordInfo.
  CUPTI_ACTIVITY_KIND_INSTRUCTION_CORRELATION | SASS/Source line-by-line correlation record. This will generate sass/source correlation for functions that have source level analysis or pc sampling results. The records will be generated only when either of source level analysis or pc sampling activity is enabled. The corresponding activity record structure is CUpti_ActivityInstructionCorrelation.
  CUPTI_ACTIVITY_KIND_OPENACC_DATA | OpenACC data events. The corresponding activity record structure is CUpti_ActivityOpenAccData.
  CUPTI_ACTIVITY_KIND_OPENACC_LAUNCH | OpenACC launch events. The corresponding activity record structure is CUpti_ActivityOpenAccLaunch.
  CUPTI_ACTIVITY_KIND_OPENACC_OTHER | OpenACC other events. The corresponding activity record structure is CUpti_ActivityOpenAccOther.
  CUPTI_ACTIVITY_KIND_CUDA_EVENT | Information about a CUDA event. The corresponding activity record structure is CUpti_ActivityCudaEvent.
  CUPTI_ACTIVITY_KIND_STREAM | Information about a CUDA stream. The corresponding activity record structure is CUpti_ActivityStream.
  CUPTI_ACTIVITY_KIND_SYNCHRONIZATION | Records for synchronization management. The corresponding activity record structure is CUpti_ActivitySynchronization.
  CUPTI_ACTIVITY_KIND_EXTERNAL_CORRELATION | Records for correlation of different programming APIs. The corresponding activity record structure is CUpti_ActivityExternalCorrelation.
  CUPTI_ACTIVITY_KIND_NVLINK | NVLink information. The corresponding activity record structure is CUpti_ActivityNvLink4.
  CUPTI_ACTIVITY_KIND_INSTANTANEOUS_EVENT | Instantaneous Event information. The corresponding activity record structure is CUpti_ActivityInstantaneousEvent.
  CUPTI_ACTIVITY_KIND_INSTANTANEOUS_EVENT_INSTANCE | Instantaneous Event information for a specific event domain instance. The corresponding activity record structure is CUpti_ActivityInstantaneousEventInstance
  CUPTI_ACTIVITY_KIND_INSTANTANEOUS_METRIC | Instantaneous Metric information The corresponding activity record structure is CUpti_ActivityInstantaneousMetric.
  CUPTI_ACTIVITY_KIND_INSTANTANEOUS_METRIC_INSTANCE | Instantaneous Metric information for a specific metric domain instance. The corresponding activity record structure is CUpti_ActivityInstantaneousMetricInstance.
  CUPTI_ACTIVITY_KIND_MEMORY | Memory activity tracking allocation and freeing of the memory The corresponding activity record structure is CUpti_ActivityMemory.
  CUPTI_ACTIVITY_KIND_PCIE | PCI devices information used for PCI topology. The corresponding activity record structure is CUpti_ActivityPcie.
  CUPTI_ACTIVITY_KIND_OPENMP | OpenMP parallel events. The corresponding activity record structure is CUpti_ActivityOpenMp.
  CUPTI_ACTIVITY_KIND_INTERNAL_LAUNCH_API | A CUDA driver kernel launch occurring outside of any public API function execution. Tools can handle these like records for driver API launch functions, although the cbid field is not used here. The corresponding activity record structure is CUpti_ActivityAPI.
  CUPTI_ACTIVITY_KIND_MEMORY2 | Memory activity tracking allocation and freeing of the memory The corresponding activity record structure is CUpti_ActivityMemory3.
  CUPTI_ACTIVITY_KIND_MEMORY_POOL | Memory pool activity tracking creation, destruction and triming of the memory pool. The corresponding activity record structure is CUpti_ActivityMemoryPool2.

enum CUpti_ActivityLaunchType

Enumerator:

  CUPTI_ACTIVITY_LAUNCH_TYPE_REGULAR | The kernel was launched via a regular kernel call
  CUPTI_ACTIVITY_LAUNCH_TYPE_COOPERATIVE_SINGLE_DEVICE | The kernel was launched via API cudaLaunchCooperativeKernel() or cuLaunchCooperativeKernel()
  CUPTI_ACTIVITY_LAUNCH_TYPE_COOPERATIVE_MULTI_DEVICE | The kernel was launched via API cudaLaunchCooperativeKernelMultiDevice() or cuLaunchCooperativeKernelMultiDevice()

enum CUpti_ActivityMemcpyKind

Each kind represents the source and destination targets of a memory copy. Targets are host, device, and array.

Enumerator:

  CUPTI_ACTIVITY_MEMCPY_KIND_UNKNOWN | The memory copy kind is not known.
  CUPTI_ACTIVITY_MEMCPY_KIND_HTOD | A host to device memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_DTOH | A device to host memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_HTOA | A host to device array memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_ATOH | A device array to host memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_ATOA | A device array to device array memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_ATOD | A device array to device memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_DTOA | A device to device array memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_DTOD | A device to device memory copy on the same device.
  CUPTI_ACTIVITY_MEMCPY_KIND_HTOH | A host to host memory copy.
  CUPTI_ACTIVITY_MEMCPY_KIND_PTOP | A peer to peer memory copy across different devices.

enum CUpti_ActivityMemoryKind

Each kind represents the type of the memory accessed by a memory operation/copy.

Enumerator:

  CUPTI_ACTIVITY_MEMORY_KIND_UNKNOWN | The memory kind is unknown.
  CUPTI_ACTIVITY_MEMORY_KIND_PAGEABLE | The memory is pageable.
  CUPTI_ACTIVITY_MEMORY_KIND_PINNED | The memory is pinned.
  CUPTI_ACTIVITY_MEMORY_KIND_DEVICE | The memory is on the device.
  CUPTI_ACTIVITY_MEMORY_KIND_ARRAY | The memory is an array.
  CUPTI_ACTIVITY_MEMORY_KIND_MANAGED | The memory is managed
  CUPTI_ACTIVITY_MEMORY_KIND_DEVICE_STATIC | The memory is device static
  CUPTI_ACTIVITY_MEMORY_KIND_MANAGED_STATIC | The memory is managed static

enum CUpti_ActivityMemoryOperationType

Describes the type of memory operation, to be used with CUpti_ActivityMemory3.

Enumerator:

  CUPTI_ACTIVITY_MEMORY_OPERATION_TYPE_ALLOCATION | Memory is allocated.
  CUPTI_ACTIVITY_MEMORY_OPERATION_TYPE_RELEASE | Memory is released.

enum CUpti_ActivityMemoryPoolOperationType

Describes the type of memory pool operation, to be used with CUpti_ActivityMemoryPool2.

Enumerator:

  CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_CREATED | Memory pool is created.
  CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_DESTROYED | Memory pool is destroyed.
  CUPTI_ACTIVITY_MEMORY_POOL_OPERATION_TYPE_TRIMMED | Memory pool is trimmed.

enum CUpti_ActivityMemoryPoolType

Describes the type of memory pool, to be used with CUpti_ActivityMemory3.

Enumerator:

  CUPTI_ACTIVITY_MEMORY_POOL_TYPE_LOCAL | Memory pool is local to the process.
  CUPTI_ACTIVITY_MEMORY_POOL_TYPE_IMPORTED | Memory pool is imported by the process.

enum CUpti_ActivityObjectKind

See also:
  CUpti_ActivityObjectKindId

Enumerator:

  CUPTI_ACTIVITY_OBJECT_UNKNOWN | The object kind is not known.
  CUPTI_ACTIVITY_OBJECT_PROCESS | A process.
  CUPTI_ACTIVITY_OBJECT_THREAD | A thread.
  CUPTI_ACTIVITY_OBJECT_DEVICE | A device.
  CUPTI_ACTIVITY_OBJECT_CONTEXT | A context.
  CUPTI_ACTIVITY_OBJECT_STREAM | A stream.

enum CUpti_ActivityOverheadKind

Enumerator:

  CUPTI_ACTIVITY_OVERHEAD_UNKNOWN | The overhead kind is not known.
  CUPTI_ACTIVITY_OVERHEAD_DRIVER_COMPILER | Compiler(JIT) overhead.
  CUPTI_ACTIVITY_OVERHEAD_CUPTI_BUFFER_FLUSH | Activity buffer flush overhead.
  CUPTI_ACTIVITY_OVERHEAD_CUPTI_INSTRUMENTATION | CUPTI instrumentation overhead.
  CUPTI_ACTIVITY_OVERHEAD_CUPTI_RESOURCE | CUPTI resource creation and destruction overhead.

enum CUpti_ActivityPartitionedGlobalCacheConfig

Enumerator:

  CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_UNKNOWN | Partitioned global cache config unknown.
  CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_NOT_SUPPORTED | Partitioned global cache not supported.
  CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_OFF | Partitioned global cache config off.
  CUPTI_ACTIVITY_PARTITIONED_GLOBAL_CACHE_CONFIG_ON | Partitioned global cache config on.

enum CUpti_ActivityPCSamplingPeriod

Sampling period can be set using cuptiActivityConfigurePCSampling

Enumerator:

  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_INVALID | The PC sampling period is not set.
  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MIN | Minimum sampling period available on the device.
  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_LOW | Sampling period in lower range.
  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MID | Medium sampling period.
  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_HIGH | Sampling period in higher range.
  CUPTI_ACTIVITY_PC_SAMPLING_PERIOD_MAX | Maximum sampling period available on the device.

enum CUpti_ActivityPCSamplingStallReason

Enumerator:

  CUPTI_ACTIVITY_PC_SAMPLING_STALL_INVALID | Invalid reason
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_NONE | No stall, instruction is selected for issue
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_INST_FETCH | Warp is blocked because next instruction is not yet available, because of instruction cache miss, or because of branching effects
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_EXEC_DEPENDENCY | Instruction is waiting on an arithmatic dependency
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_MEMORY_DEPENDENCY | Warp is blocked because it is waiting for a memory access to complete.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_TEXTURE | Texture sub-system is fully utilized or has too many outstanding requests.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_SYNC | Warp is blocked as it is waiting at __syncthreads() or at memory barrier.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_CONSTANT_MEMORY_DEPENDENCY | Warp is blocked waiting for __constant__ memory and immediate memory access to complete.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_PIPE_BUSY | Compute operation cannot be performed due to the required resources not being available.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_MEMORY_THROTTLE | Warp is blocked because there are too many pending memory operations. In Kepler architecture it often indicates high number of memory replays.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_NOT_SELECTED | Warp was ready to issue, but some other warp issued instead.
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_OTHER | Miscellaneous reasons
  CUPTI_ACTIVITY_PC_SAMPLING_STALL_SLEEPING | Sleeping.

enum CUpti_ActivityPreemptionKind

Enumerator:

  CUPTI_ACTIVITY_PREEMPTION_KIND_UNKNOWN | The preemption kind is not known.
  CUPTI_ACTIVITY_PREEMPTION_KIND_SAVE | Preemption to save CDP block.
  CUPTI_ACTIVITY_PREEMPTION_KIND_RESTORE | Preemption to restore CDP block.

enum CUpti_ActivityStreamFlag

The types of stream to be used with CUpti_ActivityStream.

Enumerator:

  CUPTI_ACTIVITY_STREAM_CREATE_FLAG_UNKNOWN | Unknown data.
  CUPTI_ACTIVITY_STREAM_CREATE_FLAG_DEFAULT | Default stream.
  CUPTI_ACTIVITY_STREAM_CREATE_FLAG_NON_BLOCKING | Non-blocking stream.
  CUPTI_ACTIVITY_STREAM_CREATE_FLAG_NULL | Null stream.
  CUPTI_ACTIVITY_STREAM_CREATE_MASK | Stream create Mask

enum CUpti_ActivitySynchronizationType

The types of synchronization to be used with CUpti_ActivitySynchronization.

Enumerator:

  CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_UNKNOWN | Unknown data.
  CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_EVENT_SYNCHRONIZE | Event synchronize API.
  CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_STREAM_WAIT_EVENT | Stream wait event API.
  CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_STREAM_SYNCHRONIZE | Stream synchronize API.
  CUPTI_ACTIVITY_SYNCHRONIZATION_TYPE_CONTEXT_SYNCHRONIZE | Context synchronize API.

enum CUpti_ActivityThreadIdType

CUPTI uses different methods to obtain the thread-id depending on the support and the underlying platform. This enum documents these methods for each type. APIs cuptiSetThreadIdType and cuptiGetThreadIdType can be used to set and get the thread-id type.

Enumerator:

  CUPTI_ACTIVITY_THREAD_ID_TYPE_DEFAULT | Default type Windows uses API GetCurrentThreadId() Linux/Mac/Android/QNX use POSIX pthread API pthread_self()
  CUPTI_ACTIVITY_THREAD_ID_TYPE_SYSTEM | This type is based on the system API available on the underlying platform and thread-id obtained is supposed to be unique for the process lifetime. Windows uses API GetCurrentThreadId() Linux uses syscall SYS_gettid Mac uses syscall SYS_thread_selfid Android/QNX use gettid()

enum CUpti_ActivityUnifiedMemoryAccessType

This is valid for CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT

Enumerator:

  CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_UNKNOWN | The unified memory access type is not known
  CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_READ | The page fault was triggered by read memory instruction
  CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_WRITE | The page fault was triggered by write memory instruction
  CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_ATOMIC | The page fault was triggered by atomic memory instruction
  CUPTI_ACTIVITY_UNIFIED_MEMORY_ACCESS_TYPE_PREFETCH | The page fault was triggered by memory prefetch operation

enum CUpti_ActivityUnifiedMemoryCounterKind

Many activities are associated with Unified Memory mechanism; among them are tranfer from host to device, device to host, page fault at host side.

Enumerator:

  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_UNKNOWN | The unified memory counter kind is not known.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD | Number of bytes transfered from host to device
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH | Number of bytes transfered from device to host
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT | Number of CPU page faults, this is only supported on 64 bit Linux and Mac platforms
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT | Number of GPU page faults, this is only supported on devices with compute capability 6.0 and higher and 64 bit Linux platforms
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING | Thrashing occurs when data is frequently accessed by multiple processors and has to be constantly migrated around to achieve data locality. In this case the overhead of migration may exceed the benefits of locality. This is only supported on 64 bit Linux platforms.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING | Throttling is a prevention technique used by the driver to avoid further thrashing. Here, the driver doesn't service the fault for one of the contending processors for a specific period of time, so that the other processor can run at full-speed. This is only supported on 64 bit Linux platforms.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP | In case throttling does not help, the driver tries to pin the memory to a processor for a specific period of time. One of the contending processors will have slow access to the memory, while the other will have fast access. This is only supported on 64 bit Linux platforms.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOD | Number of bytes transferred from one device to another device. This is only supported on 64 bit Linux platforms.

enum CUpti_ActivityUnifiedMemoryCounterScope

Enumerator:

  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_UNKNOWN | The unified memory counter scope is not known.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_PROCESS_SINGLE_DEVICE | Collect unified memory counter for single process on one device
  CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_SCOPE_PROCESS_ALL_DEVICES | Collect unified memory counter for single process across all devices

enum CUpti_ActivityUnifiedMemoryMigrationCause

This is valid for CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH

Enumerator:

  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_UNKNOWN | The unified memory migration cause is not known
  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_USER | The unified memory migrated due to an explicit call from the user e.g. cudaMemPrefetchAsync
  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_COHERENCE | The unified memory migrated to guarantee data coherence e.g. CPU/GPU faults on Pascal+ and kernel launch on pre-Pascal GPUs
  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_PREFETCH | The unified memory was speculatively migrated by the UVM driver before being accessed by the destination processor to improve performance
  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_EVICTION | The unified memory migrated to the CPU because it was evicted to make room for another block of memory on the GPU
  CUPTI_ACTIVITY_UNIFIED_MEMORY_MIGRATION_CAUSE_ACCESS_COUNTERS | The unified memory migrated to another processor because of access counter notifications. Only frequently accessed pages are migrated between CPU and GPU, or between peer GPUs.

enum CUpti_ActivityUnifiedMemoryRemoteMapCause

This is valid for CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP

Enumerator:

  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_UNKNOWN | The cause of mapping to remote memory was unknown
  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_COHERENCE | Mapping to remote memory was added to maintain data coherence.
  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_THRASHING | Mapping to remote memory was added to prevent further thrashing
  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_POLICY | Mapping to remote memory was added to enforce the hints specified by the programmer or by performance heuristics of the UVM driver
  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_OUT_OF_MEMORY | Mapping to remote memory was added because there is no more memory available on the processor and eviction was not possible
  CUPTI_ACTIVITY_UNIFIED_MEMORY_REMOTE_MAP_CAUSE_EVICTION | Mapping to remote memory was added after the memory was evicted to make room for another block of memory on the GPU

enum CUpti_DeviceVirtualizationMode

This indicates the virtualization mode in which CUDA device is running

Enumerator:

  CUPTI_DEVICE_VIRTUALIZATION_MODE_NONE | No virtualization mode isassociated with the device i.e. it's a baremetal GPU
  CUPTI_DEVICE_VIRTUALIZATION_MODE_PASS_THROUGH | The device is associated with the pass-through GPU. In this mode, an entire physical GPU is directly assigned to one virtual machine (VM).
  CUPTI_DEVICE_VIRTUALIZATION_MODE_VIRTUAL_GPU | The device is associated with the virtual GPU (vGPU). In this mode multiple virtual machines (VMs) have simultaneous, direct access to a single physical GPU.

enum CUpti_DevType

Enumerator:

  CUPTI_DEV_TYPE_GPU | The device type is GPU.
  CUPTI_DEV_TYPE_NPU | The device type is NVLink processing unit in CPU.

enum CUpti_EnvironmentClocksThrottleReason

The possible reasons that a clock can be throttled. There can be more than one reason that a clock is being throttled so these types can be combined by bitwise OR. These are used in the clocksThrottleReason field in the Environment Activity Record.

Enumerator:

  CUPTI_CLOCKS_THROTTLE_REASON_GPU_IDLE | Nothing is running on the GPU and the clocks are dropping to idle state.
  CUPTI_CLOCKS_THROTTLE_REASON_USER_DEFINED_CLOCKS | The GPU clocks are limited by a user specified limit.
  CUPTI_CLOCKS_THROTTLE_REASON_SW_POWER_CAP | A software power scaling algorithm is reducing the clocks below requested clocks.
  CUPTI_CLOCKS_THROTTLE_REASON_HW_SLOWDOWN | Hardware slowdown to reduce the clock by a factor of two or more is engaged. This is an indicator of one of the following: 1) Temperature is too high, 2) External power brake assertion is being triggered (e.g. by the system power supply), 3) Change in power state.
  CUPTI_CLOCKS_THROTTLE_REASON_UNKNOWN | Some unspecified factor is reducing the clocks.
  CUPTI_CLOCKS_THROTTLE_REASON_UNSUPPORTED | Throttle reason is not supported for this GPU.
  CUPTI_CLOCKS_THROTTLE_REASON_NONE | No clock throttling.

enum CUpti_ExternalCorrelationKind

Custom correlation kinds are reserved for usage in external tools.

See also:
  CUpti_ActivityExternalCorrelation

Enumerator:

  CUPTI_EXTERNAL_CORRELATION_KIND_UNKNOWN | The external API is unknown to CUPTI
  CUPTI_EXTERNAL_CORRELATION_KIND_OPENACC | The external API is OpenACC
  CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM0 | The external API is custom0
  CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM1 | The external API is custom1
  CUPTI_EXTERNAL_CORRELATION_KIND_CUSTOM2 | The external API is custom2
  CUPTI_EXTERNAL_CORRELATION_KIND_SIZE | Add new kinds before this line

enum CUpti_LinkFlag

Describes link properties, to be used with CUpti_ActivityNvLink.

Enumerator:

  CUPTI_LINK_FLAG_PEER_ACCESS | Is peer to peer access supported by this link.
  CUPTI_LINK_FLAG_SYSMEM_ACCESS | Is system memory access supported by this link.
  CUPTI_LINK_FLAG_PEER_ATOMICS | Is peer atomic access supported by this link.
  CUPTI_LINK_FLAG_SYSMEM_ATOMICS | Is system memory atomic access supported by this link.

enum CUpti_OpenAccEventKind

See also:
  CUpti_ActivityKindOpenAcc

enum CUpti_PcieDeviceType

Field to differentiate whether PCIE Activity record is of a GPU or a PCI Bridge

Enumerator:

  CUPTI_PCIE_DEVICE_TYPE_GPU | PCIE GPU record
  CUPTI_PCIE_DEVICE_TYPE_BRIDGE | PCIE Bridge record

enum CUpti_PcieGen

Enumeration of PCIE Generation for pcie activity attribute pcieGeneration

Enumerator:

  CUPTI_PCIE_GEN_GEN1 | PCIE Generation 1
  CUPTI_PCIE_GEN_GEN2 | PCIE Generation 2
  CUPTI_PCIE_GEN_GEN3 | PCIE Generation 3
  CUPTI_PCIE_GEN_GEN4 | PCIE Generation 4
  CUPTI_PCIE_GEN_GEN5 | PCIE Generation 5

## Function Documentation

CUptiResult cuptiActivityConfigurePCSampling | ( | CUcontext | ctx,
|  | CUpti_ActivityPCSamplingConfig * | config |
| ) |  |  |

For Pascal and older GPU architectures this API must be called before enabling activity kind CUPTI_ACTIVITY_KIND_PC_SAMPLING. There is no such requirement for Volta and newer GPU architectures.

For Volta and newer GPU architectures if this API is called in the middle of execution, PC sampling configuration will be updated for subsequent kernel launches.

Parameters:

  | ctx | The context
  | config | A pointer to CUpti_ActivityPCSamplingConfig structure containing PC sampling configuration.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_OPERATION | if this api is called while some valid event collection method is set.
  | CUPTI_ERROR_INVALID_PARAMETER | if `config` is NULL or any parameter in the `config` structures is not a valid value
  | CUPTI_ERROR_NOT_SUPPORTED | Indicates that the system/device does not support the unified memory counters

CUptiResult cuptiActivityConfigureUnifiedMemoryCounter | ( | CUpti_ActivityUnifiedMemoryCounterConfig * | config,
|  | uint32_t | count |
| ) |  |  |

Parameters:

  | config | A pointer to CUpti_ActivityUnifiedMemoryCounterConfig structures containing Unified Memory counter configuration.
  | count | Number of Unified Memory counter configuration structures

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `config` is NULL or any parameter in the `config` structures is not a valid value
  | CUPTI_ERROR_UM_PROFILING_NOT_SUPPORTED | One potential reason is that platform (OS/arch) does not support the unified memory counters
  | CUPTI_ERROR_UM_PROFILING_NOT_SUPPORTED_ON_DEVICE | Indicates that the device does not support the unified memory counters
  | CUPTI_ERROR_UM_PROFILING_NOT_SUPPORTED_ON_NON_P2P_DEVICES | Indicates that multi-GPU configuration without P2P support between any pair of devices does not support the unified memory counters

CUptiResult cuptiActivityDisable | ( | CUpti_ActivityKind | kind | ) |

Disable collection of a specific kind of activity record. Multiple kinds can be disabled by calling this function multiple times. By default all activity kinds are disabled for collection.

Parameters:

  | kind | The kind of activity record to stop collecting

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_KIND | if the activity kind is not supported

CUptiResult cuptiActivityDisableContext | ( | CUcontext | context,
|  | CUpti_ActivityKind | kind |
| ) |  |  |

Disable collection of a specific kind of activity record for a context. This setting done by this API will supersede the global settings for activity records. Multiple kinds can be enabled by calling this function multiple times.

Parameters:

  | context | The context for which activity is to be disabled
  | kind | The kind of activity record to stop collecting

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_KIND | if the activity kind is not supported

CUptiResult cuptiActivityEnable | ( | CUpti_ActivityKind | kind | ) |

Enable collection of a specific kind of activity record. Multiple kinds can be enabled by calling this function multiple times. By default all activity kinds are disabled for collection.

Parameters:

  | kind | The kind of activity record to collect

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_NOT_COMPATIBLE | if the activity kind cannot be enabled
  | CUPTI_ERROR_INVALID_KIND | if the activity kind is not supported

CUptiResult cuptiActivityEnableContext | ( | CUcontext | context,
|  | CUpti_ActivityKind | kind |
| ) |  |  |

Enable collection of a specific kind of activity record for a context. This setting done by this API will supersede the global settings for activity records enabled by cuptiActivityEnable. Multiple kinds can be enabled by calling this function multiple times.

Parameters:

  | context | The context for which activity is to be enabled
  | kind | The kind of activity record to collect

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_NOT_COMPATIBLE | if the activity kind cannot be enabled
  | CUPTI_ERROR_INVALID_KIND | if the activity kind is not supported

CUptiResult cuptiActivityEnableLatencyTimestamps | ( | uint8_t | enable | ) |

This API is used to control the collection of queued and submitted timestamps for kernels whose records are provided through the struct CUpti_ActivityKernel7. Default value is 0, i.e. these timestamps are not collected. This API needs to be called before initialization of CUDA and this setting should not be changed during the profiling session.

Parameters:

  | enable | is a boolean, denoting whether these timestamps should be collected

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |

CUptiResult cuptiActivityEnableLaunchAttributes | ( | uint8_t | enable | ) |

This API is used to control the collection of launch attributes for kernels whose records are provided through the struct CUpti_ActivityKernel7. Default value is 0, i.e. these attributes are not collected.

Parameters:

  | enable | is a boolean denoting whether these launch attributes should be collected

CUptiResult cuptiActivityFlush | ( | CUcontext | context,
|  | uint32_t | streamId,
|  | uint32_t | flag |
| ) |  |  |

This function does not return until all activity records associated with the specified context/stream are returned to the CUPTI client using the callback registered in cuptiActivityRegisterCallbacks. To ensure that all activity records are complete, the requested stream(s), if any, are synchronized.

If `context` is NULL, the global activity records (i.e. those not associated with a particular stream) are flushed (in this case no streams are synchonized). If `context` is a valid CUcontext and `streamId` is 0, the buffers of all streams of this context are flushed. Otherwise, the buffers of the specified stream in this context is flushed.

Before calling this function, the buffer handling callback api must be activated by calling cuptiActivityRegisterCallbacks.

Parameters:

  | context | A valid CUcontext or NULL.
  | streamId | The stream ID.
  | flag | The flag can be set to indicate a forced flush. See CUpti_ActivityFlag

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_CUPTI_ERROR_INVALID_OPERATION | if not preceeded by a successful call to cuptiActivityRegisterCallbacks
  | CUPTI_ERROR_UNKNOWN | an internal error occurred

**DEPRECATED** This method is deprecated CONTEXT and STREAMID will be ignored. Use cuptiActivityFlushAll to flush all data.

CUptiResult cuptiActivityFlushAll | ( | uint32_t | flag | ) |

This function returns the activity records associated with all contexts/streams (and the global buffers not associated with any stream) to the CUPTI client using the callback registered in cuptiActivityRegisterCallbacks.

This is a blocking call but it doesn't issue any CUDA synchronization calls implicitly thus it's not guaranteed that all activities are completed on the underlying devices. Activity record is considered as completed if it has all the information filled up including the timestamps if any. It is the client's responsibility to issue necessary CUDA synchronization calls before calling this function if all activity records with complete information are expected to be delivered.

Behavior of the function based on the input flag:

- For default flush i.e. when flag is set as 0, it returns all the activity buffers which have all the activity records completed, buffers need not to be full though. It doesn't return buffers which have one or more incomplete records. Default flush can be done at a regular interval in a separate thread.
- For forced flush i.e. when flag CUPTI_ACTIVITY_FLAG_FLUSH_FORCED is passed to the function, it returns all the activity buffers including the ones which have one or more incomplete activity records. It's suggested for clients to do the force flush before the termination of the profiling session to allow remaining buffers to be delivered. In general, it can be done in the at-exit handler.

Before calling this function, the buffer handling callback api must be activated by calling cuptiActivityRegisterCallbacks.

Parameters:

  | flag | The flag can be set to indicate a forced flush. See CUpti_ActivityFlag

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_OPERATION | if not preceeded by a successful call to cuptiActivityRegisterCallbacks
  | CUPTI_ERROR_UNKNOWN | an internal error occurred

See also:
  cuptiActivityFlushPeriod

CUptiResult cuptiActivityFlushPeriod | ( | uint32_t | time | ) |

CUPTI creates a worker thread to minimize the perturbance for the application created threads. CUPTI offloads certain operations from the application threads to the worker thread, this includes synchronization of profiling resources between host and device, delivery of the activity buffers to the client using the callback registered in cuptiActivityRegisterCallbacks. For performance reasons, CUPTI wakes up the worker thread based on certain heuristics.

This API is used to control the flush period of the worker thread. This setting will override the CUPTI heurtistics. Setting time to zero disables the periodic flush and restores the default behavior.

Periodic flush can return only those activity buffers which are full and have all the activity records completed.

It's allowed to use the API cuptiActivityFlushAll to flush the data on-demand, even when client sets the periodic flush.

Parameters:

  | time | flush period in msec

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |

See also:
  cuptiActivityFlushAll

CUptiResult cuptiActivityGetAttribute | ( | CUpti_ActivityAttribute | attr,
|  | size_t * | valueSize,
|  | void * | value |
| ) |  |  |

Read an activity API attribute and return it in `*value`.

Parameters:

  | attr | The attribute to read
  | valueSize | Size of buffer pointed by the value, and returns the number of bytes written to `value`
  | value | Returns the value of the attribute

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `valueSize` or `value` is NULL, or if `attr` is not an activity attribute
  | CUPTI_ERROR_PARAMETER_SIZE_NOT_SUFFICIENT | Indicates that the `value` buffer is too small to hold the attribute value.

CUptiResult cuptiActivityGetNextRecord | ( | uint8_t * | buffer,
|  | size_t | validBufferSizeBytes,
|  | CUpti_Activity ** | record |
| ) |  |  |

This is a helper function to iterate over the activity records in a buffer. A buffer of activity records is typically obtained by receiving a CUpti_BuffersCallbackCompleteFunc callback.

An example of typical usage:

     CUpti_Activity *record = NULL;
     CUptiResult status = CUPTI_SUCCESS;
       do {
          status = cuptiActivityGetNextRecord(buffer, validSize, &record);
          if(status == CUPTI_SUCCESS) {
               // Use record here...
          }
          else if (status == CUPTI_ERROR_MAX_LIMIT_REACHED)
              break;
          else {
              goto Error;
          }
        } while (1);

Parameters:

  | buffer | The buffer containing activity records
  | record | Inputs the previous record returned by cuptiActivityGetNextRecord and returns the next activity record from the buffer. If input value is NULL, returns the first activity record in the buffer. Records of kind CUPTI_ACTIVITY_KIND_CONCURRENT_KERNEL may contain invalid (0) timestamps, indicating that no timing information could be collected for lack of device memory.
  | validBufferSizeBytes | The number of valid bytes in the buffer.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_MAX_LIMIT_REACHED | if no more records in the buffer
  | CUPTI_ERROR_INVALID_PARAMETER | if `buffer` is NULL.

CUptiResult cuptiActivityGetNumDroppedRecords | ( | CUcontext | context,
|  | uint32_t | streamId,
|  | size_t * | dropped |
| ) |  |  |

Get the number of records that were dropped because of insufficient buffer space. The dropped count includes records that could not be recorded because CUPTI did not have activity buffer space available for the record (because the CUpti_BuffersCallbackRequestFunc callback did not return an empty buffer of sufficient size) and also CDP records that could not be record because the device-size buffer was full (size is controlled by the CUPTI_ACTIVITY_ATTR_DEVICE_BUFFER_SIZE_CDP attribute). The dropped count maintained for the queue is reset to zero when this function is called.

Parameters:

  | context | The context, or NULL to get dropped count from global queue
  | streamId | The stream ID
  | dropped | The number of records that were dropped since the last call to this function.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `dropped` is NULL

CUptiResult cuptiActivityPopExternalCorrelationId | ( | CUpti_ExternalCorrelationKind | kind,
|  | uint64_t * | lastId |
| ) |  |  |

This function notifies CUPTI that the calling thread is leaving an external API region.

Parameters:

  | kind | The kind of external API activities should be correlated with.
  | lastId | If the function returns successful, contains the last external correlation id for this `kind`, can be NULL.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | The external API kind is invalid.
  | CUPTI_ERROR_QUEUE_EMPTY | No external id is currently associated with `kind`.

CUptiResult cuptiActivityPushExternalCorrelationId | ( | CUpti_ExternalCorrelationKind | kind,
|  | uint64_t | id |
| ) |  |  |

This function notifies CUPTI that the calling thread is entering an external API region. When a CUPTI activity API record is created while within an external API region and CUPTI_ACTIVITY_KIND_EXTERNAL_CORRELATION is enabled, the activity API record will be preceeded by a CUpti_ActivityExternalCorrelation record for each CUpti_ExternalCorrelationKind.

Parameters:

  | kind | The kind of external API activities should be correlated with.
  | id | External correlation id.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | The external API kind is invalid

CUptiResult cuptiActivityRegisterCallbacks | ( | CUpti_BuffersCallbackRequestFunc | funcBufferRequested,
|  | CUpti_BuffersCallbackCompleteFunc | funcBufferCompleted |
| ) |  |  |

This function registers two callback functions to be used in asynchronous buffer handling. If registered, activity record buffers are handled using asynchronous requested/completed callbacks from CUPTI.

Registering these callbacks prevents the client from using CUPTI's blocking enqueue/dequeue functions.

Parameters:

  | funcBufferRequested | callback which is invoked when an empty buffer is requested by CUPTI
  | funcBufferCompleted | callback which is invoked when a buffer containing activity records is available from CUPTI

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if either `funcBufferRequested` or `funcBufferCompleted` is NULL

CUptiResult cuptiActivityRegisterTimestampCallback | ( | CUpti_TimestampCallbackFunc | funcTimestamp | ) |

This function registers a callback function to obtain timestamp of user's choice instead of using CUPTI provided timestamp. By default CUPTI uses different methods, based on the underlying platform, to retrieve the timestamp Linux and Android use clock_gettime(CLOCK_REALTIME, ..) Windows uses QueryPerformanceCounter() Mac uses mach_absolute_time() QNX uses ClockCycles() Timestamps retrieved using these methods are converted to nanosecond if needed before usage.

Parameters:

  | funcTimestamp | callback which is invoked when a timestamp is needed by CUPTI

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `funcTimestamp` is NULL
  | CUPTI_ERROR_NOT_INITIALIZED |

CUptiResult cuptiActivitySetAttribute | ( | CUpti_ActivityAttribute | attr,
|  | size_t * | valueSize,
|  | void * | value |
| ) |  |  |

Write an activity API attribute.

Parameters:

  | attr | The attribute to write
  | valueSize | The size, in bytes, of the value
  | value | The attribute value to write

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `valueSize` or `value` is NULL, or if `attr` is not an activity attribute
  | CUPTI_ERROR_PARAMETER_SIZE_NOT_SUFFICIENT | Indicates that the `value` buffer is too small to hold the attribute value.

CUptiResult cuptiComputeCapabilitySupported | ( | int | major,
|  | int | minor,
|  | int * | support |
| ) |  |  |

This function is used to check the support for a device based on it's compute capability. It sets the `support` when the compute capability is supported by the current version of CUPTI, and clears it otherwise. This version of CUPTI might not support all GPUs sharing the same compute capability. It is suggested to use API cuptiDeviceSupported which provides correct information.

Parameters:

  | major | The major revision number of the compute capability
  | minor | The minor revision number of the compute capability
  | support | Pointer to an integer to return the support status

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `support` is NULL

See also:
  cuptiDeviceSupported

CUptiResult cuptiDeviceSupported | ( | CUdevice | dev,
|  | int * | support |
| ) |  |  |

This function is used to check the support for a compute device. It sets the `support` when the device is supported by the current version of CUPTI, and clears it otherwise.

Parameters:

  | dev | The device handle returned by CUDA Driver API cuDeviceGet
  | support | Pointer to an integer to return the support status

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `support` is NULL
  | CUPTI_ERROR_INVALID_DEVICE | if `dev` is not a valid device

See also:
  cuptiComputeCapabilitySupported

CUptiResult cuptiDeviceVirtualizationMode | ( | CUdevice | dev,
|  | CUpti_DeviceVirtualizationMode * | mode |
| ) |  |  |

This function is used to query the virtualization mode of the CUDA device.

Parameters:

  | dev | The device handle returned by CUDA Driver API cuDeviceGet
  | mode | Pointer to an CUpti_DeviceVirtualizationMode to return the virtualization mode

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_DEVICE | if `dev` is not a valid device
  | CUPTI_ERROR_INVALID_PARAMETER | if `mode` is NULL

CUptiResult cuptiFinalize | ( | void |  | ) |

This API detaches the CUPTI from the running process. It destroys and cleans up all the resources associated with CUPTI in the current process. After CUPTI detaches from the process, the process will keep on running with no CUPTI attached to it. For safe operation of the API, it is recommended this API is invoked from the exit callsite of any of the CUDA Driver or Runtime API. Otherwise CUPTI client needs to make sure that required CUDA synchronization and CUPTI activity buffer flush is done before calling the API. Sample code showing the usage of the API in the cupti callback handler code:

        void CUPTIAPI
        cuptiCallbackHandler(void *userdata, CUpti_CallbackDomain domain,
            CUpti_CallbackId cbid, void *cbdata)
        {
            const CUpti_CallbackData *cbInfo = (CUpti_CallbackData *)cbdata;

            // Take this code path when CUPTI detach is requested
            if (detachCupti) {
                switch(domain)
                {
                case CUPTI_CB_DOMAIN_RUNTIME_API:
                case CUPTI_CB_DOMAIN_DRIVER_API:
                    if (cbInfo->callbackSite == CUPTI_API_EXIT) {
                        // call the CUPTI detach API
                        cuptiFinalize();
                    }
                    break;
                default:
                    break;
                }
            }
        }

CUptiResult cuptiGetAutoBoostState | ( | CUcontext | context,
|  | CUpti_ActivityAutoBoostState * | state |
| ) |  |  |

The profiling results can be inconsistent in case auto boost is enabled. CUPTI tries to disable auto boost while profiling. It can fail to disable in cases where user does not have the permissions or CUDA_AUTO_BOOST env variable is set. The function can be used to query whether auto boost is enabled.

Parameters:

  | context | A valid CUcontext.
  | state | A pointer to CUpti_ActivityAutoBoostState structure which contains the current state and the id of the process that has requested the current state

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `CUcontext` or `state` is NULL
  | CUPTI_ERROR_NOT_SUPPORTED | Indicates that the device does not support auto boost
  | CUPTI_ERROR_UNKNOWN | an internal error occurred

CUptiResult cuptiGetContextId | ( | CUcontext | context,
|  | uint32_t * | contextId |
| ) |  |  |

Get the ID of a context.

Parameters:

  | context | The context
  | contextId | Returns a process-unique ID for the context

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_CONTEXT | The context is NULL or not valid.
  | CUPTI_ERROR_INVALID_PARAMETER | if `contextId` is NULL

CUptiResult cuptiGetDeviceId | ( | CUcontext | context,
|  | uint32_t * | deviceId |
| ) |  |  |

If `context` is NULL, returns the ID of the device that contains the currently active context. If `context` is non-NULL, returns the ID of the device which contains that context. Operates in a similar manner to cudaGetDevice() or cuCtxGetDevice() but may be called from within callback functions.

Parameters:

  | context | The context, or NULL to indicate the current context.
  | deviceId | Returns the ID of the device that is current for the calling thread.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_DEVICE | if unable to get device ID
  | CUPTI_ERROR_INVALID_PARAMETER | if `deviceId` is NULL

CUptiResult cuptiGetGraphId | ( | CUgraph | graph,
|  | uint32_t * | pId |
| ) |  |  |

Returns the unique ID of CUDA graph.

Parameters:

  | graph | The graph.
  | pId | Returns the unique ID of the graph

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `graph` is NULL

CUptiResult cuptiGetGraphNodeId | ( | CUgraphNode | node,
|  | uint64_t * | nodeId |
| ) |  |  |

Returns the unique ID of the CUDA graph node.

Parameters:

  | node | The graph node.
  | nodeId | Returns the unique ID of the node

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_PARAMETER | if `node` is NULL

CUptiResult cuptiGetLastError | ( | void |  | ) |

Returns the last error that has been produced by any of the cupti api calls or the callback in the same host thread and resets it to CUPTI_SUCCESS.

CUptiResult cuptiGetStreamId | ( | CUcontext | context,
|  | CUstream | stream,
|  | uint32_t * | streamId |
| ) |  |  |

Get the ID of a stream. The stream ID is unique within a context (i.e. all streams within a context will have unique stream IDs).

Parameters:

  | context | If non-NULL then the stream is checked to ensure that it belongs to this context. Typically this parameter should be null.
  | stream | The stream
  | streamId | Returns a context-unique ID for the stream

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_STREAM | if unable to get stream ID, or if `context` is non-NULL and `stream` does not belong to the context
  | CUPTI_ERROR_INVALID_PARAMETER | if `streamId` is NULL

**DEPRECATED** This method is deprecated as of CUDA 8.0. Use method cuptiGetStreamIdEx instead.

CUptiResult cuptiGetStreamIdEx | ( | CUcontext | context,
|  | CUstream | stream,
|  | uint8_t | perThreadStream,
|  | uint32_t * | streamId |
| ) |  |  |

Get the ID of a stream. The stream ID is unique within a context (i.e. all streams within a context will have unique stream IDs).

Parameters:

  | context | If non-NULL then the stream is checked to ensure that it belongs to this context. Typically this parameter should be null.
  | stream | The stream
  | perThreadStream | Flag to indicate if program is compiled for per-thread streams
  | streamId | Returns a context-unique ID for the stream

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_INITIALIZED |
  | CUPTI_ERROR_INVALID_STREAM | if unable to get stream ID, or if `context` is non-NULL and `stream` does not belong to the context
  | CUPTI_ERROR_INVALID_PARAMETER | if `streamId` is NULL

CUptiResult cuptiGetThreadIdType | ( | CUpti_ActivityThreadIdType * | type | ) |

Returns the thread-id type used in CUPTI

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `type` is NULL

CUptiResult cuptiGetTimestamp | ( | uint64_t * | timestamp | ) |

Returns a timestamp normalized to correspond with the start and end timestamps reported in the CUPTI activity records. The timestamp is reported in nanoseconds.

Parameters:

  | timestamp | Returns the CUPTI timestamp

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_INVALID_PARAMETER | if `timestamp` is NULL

CUptiResult cuptiSetThreadIdType | ( | CUpti_ActivityThreadIdType | type | ) |

CUPTI uses the method corresponding to set type to generate the thread-id. See enum CUpti_ActivityThreadIdType for the list of methods. Activity records having thread-id field contain the same value. Thread id type must not be changed during the profiling session to avoid thread-id value mismatch across activity records.

Return values:

  | CUPTI_SUCCESS |
  | CUPTI_ERROR_NOT_SUPPORTED | if `type` is not supported on the platform