perf counters: implement PERF_COUNT_TASK_CLOCK

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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>

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This commit is contained in:

Ingo Molnar 2008-12-11 14:03:20 +01:00

parent 01b2838c42

commit bae43c9945

2 changed files with 27 additions and 2 deletions

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7

include/linux/perf_counter.h

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22

kernel/perf_counter.c

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