perf_counter: PERF_RECORD_TIME (339f7c90) · Commits · 戴 / test

include/linux/perf_counter.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,7 @@ enum perf_counter_record_format {
		PERF_RECORD_TID = 1U << 1,
		PERF_RECORD_GROUP = 1U << 2,
		PERF_RECORD_CALLCHAIN = 1U << 3,
		PERF_RECORD_TIME = 1U << 4,
		};

		/*
		@@ -221,6 +222,7 @@ enum perf_event_type {
		__PERF_EVENT_TID = PERF_RECORD_TID,
		__PERF_EVENT_GROUP = PERF_RECORD_GROUP,
		__PERF_EVENT_CALLCHAIN = PERF_RECORD_CALLCHAIN,
		__PERF_EVENT_TIME = PERF_RECORD_TIME,
		};

		#ifdef __KERNEL__

+14 −0

Original line number	Diff line number	Diff line
		@@ -1826,6 +1826,7 @@ static void perf_counter_output(struct perf_counter *counter,
		} group_entry;
		struct perf_callchain_entry *callchain = NULL;
		int callchain_size = 0;
		u64 time;

		header.type = PERF_EVENT_COUNTER_OVERFLOW;
		header.size = sizeof(header);
		@@ -1862,6 +1863,16 @@ static void perf_counter_output(struct perf_counter *counter,
		}
		}

		if (record_type & PERF_RECORD_TIME) {
		/*
		* Maybe do better on x86 and provide cpu_clock_nmi()
		*/
		time = sched_clock();

		header.type \|= __PERF_EVENT_TIME;
		header.size += sizeof(u64);
		}

		ret = perf_output_begin(&handle, counter, header.size, nmi);
		if (ret)
		return;
		@@ -1895,6 +1906,9 @@ static void perf_counter_output(struct perf_counter *counter,
		if (callchain)
		perf_output_copy(&handle, callchain, callchain_size);

		if (record_type & PERF_RECORD_TIME)
		perf_output_put(&handle, time);

		perf_output_end(&handle);
		}