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perfcounters: add PERF_COUNT_BUS_CYCLES

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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>
This commit is contained in:
Ingo Molnar 2008-12-23 12:17:29 +01:00
parent 235c7fc7c5
commit f650a67235
2 changed files with 5 additions and 3 deletions
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3
arch/x86/kernel/cpu/perf_counter.c
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@ -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);

5
include/linux/perf_counter.h
View File

@ -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