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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-11 14:03:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-11 15:45:54 +0100 |
| commit | bae43c9945ebeef15e7952e317efb02393d3bfc7 (patch) | |
| tree | 78d12a494fa9c3f73e76e8d7895ceb94d48d517d /include/linux/perf_counter.h | |
| parent | 01b2838c4298c5e0d30b4993c195ac34dd9df61e (diff) | |
| download | linux-stable-bae43c9945ebeef15e7952e317efb02393d3bfc7.tar.gz linux-stable-bae43c9945ebeef15e7952e317efb02393d3bfc7.tar.bz2 linux-stable-bae43c9945ebeef15e7952e317efb02393d3bfc7.zip | |
perf counters: implement PERF_COUNT_TASK_CLOCK
Impact: add new perf-counter type
The 'task clock' counter counts the amount of time a task is executing,
in nanoseconds. It stops ticking when a task is scheduled out either due
to it blocking, sleeping or it being preempted.
This counter type is a Linux kernel based abstraction, it is available
even if the hardware does not support native hardware performance counters.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 68f6e3ad531f..30c0ec8c1ee3 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -50,8 +50,11 @@ enum hw_event_types { */ PERF_COUNT_CPU_CLOCK = -1, PERF_COUNT_TASK_CLOCK = -2, - PERF_COUNT_PAGE_FAULTS = -3, - PERF_COUNT_CONTEXT_SWITCHES = -4, + /* + * Future software events: + */ + /* PERF_COUNT_PAGE_FAULTS = -3, + PERF_COUNT_CONTEXT_SWITCHES = -4, */ }; /* |