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Commit f650a672 authored Dec 23, 2008 by Ingo Molnar

perfcounters: add PERF_COUNT_BUS_CYCLES



Generalize "bus cycles" hw events - and map them to CPU_CLK_Unhalted.Ref
on x86. (which is a good enough approximation)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 235c7fc7

arch/x86/kernel/cpu/perf_counter.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -41,12 +41,13 @@ static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters);

		static const int intel_perfmon_event_map[] =
		{
		[PERF_COUNT_CYCLES] = 0x003c,
		[PERF_COUNT_CPU_CYCLES] = 0x003c,
		[PERF_COUNT_INSTRUCTIONS] = 0x00c0,
		[PERF_COUNT_CACHE_REFERENCES] = 0x4f2e,
		[PERF_COUNT_CACHE_MISSES] = 0x412e,
		[PERF_COUNT_BRANCH_INSTRUCTIONS] = 0x00c4,
		[PERF_COUNT_BRANCH_MISSES] = 0x00c5,
		[PERF_COUNT_BUS_CYCLES] = 0x013c,
		};

		static const int max_intel_perfmon_events = ARRAY_SIZE(intel_perfmon_event_map);

include/linux/perf_counter.h

+3 −2

Original line number	Diff line number	Diff line
		@@ -36,14 +36,15 @@ enum hw_event_types {
		/*
		* Common hardware events, generalized by the kernel:
		*/
		PERF_COUNT_CYCLES = 0,
		PERF_COUNT_CPU_CYCLES = 0,
		PERF_COUNT_INSTRUCTIONS = 1,
		PERF_COUNT_CACHE_REFERENCES = 2,
		PERF_COUNT_CACHE_MISSES = 3,
		PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
		PERF_COUNT_BRANCH_MISSES = 5,
		PERF_COUNT_BUS_CYCLES = 6,

		PERF_HW_EVENTS_MAX = 6,
		PERF_HW_EVENTS_MAX = 7,

		/*
		* Special "software" counters provided by the kernel, even if