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(parent: 01b2838) | patch
perf counters: implement PERF_COUNT_TASK_CLOCK
authorIngo Molnar <mingo@elte.hu>
Thu, 11 Dec 2008 13:03:20 +0000 (14:03 +0100)
committerIngo Molnar <mingo@elte.hu>
Thu, 11 Dec 2008 14:45:54 +0000 (15:45 +0100)
commitbae43c9945ebeef15e7952e317efb02393d3bfc7
tree78d12a494fa9c3f73e76e8d7895ceb94d48d517dtree | snapshot
parent01b2838c4298c5e0d30b4993c195ac34dd9df61ecommit | diff
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>
include/linux/perf_counter.h diff | blob | history
kernel/perf_counter.c diff | blob | history
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