perf tools: Add perf trace (5f9c39dc) · Commits · 戴 / test

tools/perf/Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -347,6 +347,9 @@ LIB_OBJS += util/values.o
		LIB_OBJS += util/debug.o
		LIB_OBJS += util/map.o
		LIB_OBJS += util/thread.o
		LIB_OBJS += util/trace-event-parse.o
		LIB_OBJS += util/trace-event-read.o
		LIB_OBJS += util/trace-event-info.o

		BUILTIN_OBJS += builtin-annotate.o
		BUILTIN_OBJS += builtin-help.o
		@@ -355,6 +358,7 @@ BUILTIN_OBJS += builtin-record.o
		BUILTIN_OBJS += builtin-report.o
		BUILTIN_OBJS += builtin-stat.o
		BUILTIN_OBJS += builtin-top.o
		BUILTIN_OBJS += builtin-trace.o

		PERFLIBS = $(LIB_FILE)

tools/perf/builtin-record.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include "util/header.h"
		#include "util/event.h"
		#include "util/debug.h"
		#include "util/trace-event.h"

		#include <unistd.h>
		#include <sched.h>
		@@ -519,6 +520,9 @@ static int __cmd_record(int argc, const char **argv)
		signal(SIGCHLD, sig_handler);
		signal(SIGINT, sig_handler);

		if (raw_samples)
		read_tracing_data();

		if (!stat(output_name, &st) && st.st_size) {
		if (!force && !append_file) {
		fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n",

tools/perf/builtin-trace.c

0 → 100644

+277 −0

Original line number	Diff line number	Diff line
		#include "builtin.h"

		#include "util/util.h"
		#include "util/cache.h"
		#include "util/symbol.h"
		#include "util/thread.h"
		#include "util/header.h"

		#include "util/parse-options.h"

		#include "perf.h"
		#include "util/debug.h"

		#include "util/trace-event.h"

		static char const *input_name = "perf.data";
		static int input;
		static unsigned long page_size;
		static unsigned long mmap_window = 32;

		static unsigned long total = 0;
		static unsigned long total_comm = 0;

		static struct rb_root threads;
		static struct thread *last_match;

		static struct perf_header *header;
		static u64 sample_type;


		static int
		process_comm_event(event_t *event, unsigned long offset, unsigned long head)
		{
		struct thread *thread;

		thread = threads__findnew(event->comm.pid, &threads, &last_match);

		dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->comm.comm, event->comm.pid);

		if (thread == NULL \|\|
		thread__set_comm(thread, event->comm.comm)) {
		dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n");
		return -1;
		}
		total_comm++;

		return 0;
		}

		static int
		process_sample_event(event_t *event, unsigned long offset, unsigned long head)
		{
		char level;
		int show = 0;
		struct dso *dso = NULL;
		struct thread *thread;
		u64 ip = event->ip.ip;
		u64 period = 1;
		void *more_data = event->ip.__more_data;
		int cpumode;

		thread = threads__findnew(event->ip.pid, &threads, &last_match);

		if (sample_type & PERF_SAMPLE_PERIOD) {
		period = (u64 )more_data;
		more_data += sizeof(u64);
		}

		dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
		(void *)(offset + head),
		(void *)(long)(event->header.size),
		event->header.misc,
		event->ip.pid, event->ip.tid,
		(void *)(long)ip,
		(long long)period);

		dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);

		if (thread == NULL) {
		eprintf("problem processing %d event, skipping it.\n",
		event->header.type);
		return -1;
		}

		cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;

		if (cpumode == PERF_EVENT_MISC_KERNEL) {
		show = SHOW_KERNEL;
		level = 'k';

		dso = kernel_dso;

		dump_printf(" ...... dso: %s\n", dso->name);

		} else if (cpumode == PERF_EVENT_MISC_USER) {

		show = SHOW_USER;
		level = '.';

		} else {
		show = SHOW_HV;
		level = 'H';

		dso = hypervisor_dso;

		dump_printf(" ...... dso: [hypervisor]\n");
		}

		if (sample_type & PERF_SAMPLE_RAW) {
		struct {
		u32 size;
		char data[0];
		} *raw = more_data;

		/*
		* FIXME: better resolve from pid from the struct trace_entry
		* field, although it should be the same than this perf
		* event pid
		*/
		print_event(0, raw->data, raw->size, 0, thread->comm);
		}
		total += period;

		return 0;
		}

		static int
		process_event(event_t *event, unsigned long offset, unsigned long head)
		{
		trace_event(event);

		switch (event->header.type) {
		case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
		return 0;

		case PERF_EVENT_COMM:
		return process_comm_event(event, offset, head);

		case PERF_EVENT_EXIT ... PERF_EVENT_READ:
		return 0;

		case PERF_EVENT_SAMPLE:
		return process_sample_event(event, offset, head);

		case PERF_EVENT_MAX:
		default:
		return -1;
		}

		return 0;
		}

		static int __cmd_trace(void)
		{
		int ret, rc = EXIT_FAILURE;
		unsigned long offset = 0;
		unsigned long head = 0;
		struct stat perf_stat;
		event_t *event;
		uint32_t size;
		char *buf;

		trace_report();

		input = open(input_name, O_RDONLY);
		if (input < 0) {
		perror("failed to open file");
		exit(-1);
		}

		ret = fstat(input, &perf_stat);
		if (ret < 0) {
		perror("failed to stat file");
		exit(-1);
		}

		if (!perf_stat.st_size) {
		fprintf(stderr, "zero-sized file, nothing to do!\n");
		exit(0);
		}
		header = perf_header__read(input);
		sample_type = perf_header__sample_type(header);

		if (load_kernel() < 0) {
		perror("failed to load kernel symbols");
		return EXIT_FAILURE;
		}

		remap:
		buf = (char )mmap(NULL, page_size mmap_window, PROT_READ,
		MAP_SHARED, input, offset);
		if (buf == MAP_FAILED) {
		perror("failed to mmap file");
		exit(-1);
		}

		more:
		event = (event_t *)(buf + head);

		size = event->header.size;
		if (!size)
		size = 8;

		if (head + event->header.size >= page_size * mmap_window) {
		unsigned long shift = page_size * (head / page_size);
		int res;

		res = munmap(buf, page_size * mmap_window);
		assert(res == 0);

		offset += shift;
		head -= shift;
		goto remap;
		}

		size = event->header.size;


		if (!size \|\| process_event(event, offset, head) < 0) {

		/*
		* assume we lost track of the stream, check alignment, and
		* increment a single u64 in the hope to catch on again 'soon'.
		*/

		if (unlikely(head & 7))
		head &= ~7ULL;

		size = 8;
		}

		head += size;

		if (offset + head < (unsigned long)perf_stat.st_size)
		goto more;

		rc = EXIT_SUCCESS;
		close(input);

		return rc;
		}

		static const char * const annotate_usage[] = {
		"perf trace [<options>] <command>",
		NULL
		};

		static const struct option options[] = {
		OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
		"dump raw trace in ASCII"),
		OPT_BOOLEAN('v', "verbose", &verbose,
		"be more verbose (show symbol address, etc)"),
		};

		int cmd_trace(int argc, const char *argv, const char prefix __used)
		{
		symbol__init();
		page_size = getpagesize();

		argc = parse_options(argc, argv, options, annotate_usage, 0);
		if (argc) {
		/*
		* Special case: if there's an argument left then assume tha
		* it's a symbol filter:
		*/
		if (argc > 1)
		usage_with_options(annotate_usage, options);
		}


		setup_pager();

		return __cmd_trace();
		}

tools/perf/perf.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -292,6 +292,7 @@ static void handle_internal_command(int argc, const char **argv)
		{ "top", cmd_top, 0 },
		{ "annotate", cmd_annotate, 0 },
		{ "version", cmd_version, 0 },
		{ "trace", cmd_trace, 0 },
		};
		unsigned int i;
		static const char ext[] = STRIP_EXTENSION;

tools/perf/util/util.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -311,6 +311,7 @@ static inline int has_extension(const char filename, const char ext)
		#undef isspace
		#undef isdigit
		#undef isalpha
		#undef isprint
		#undef isalnum
		#undef tolower
		#undef toupper

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