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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-04-06 11:45:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-07 10:49:00 +0200 |
| commit | 4af4998b8aa35600f4c4a4f3c3a23baca6081d02 (patch) | |
| tree | c980ff7f7c9f21acf873184ec9d63cfb6435a2a5 /include/linux/perf_counter.h | |
| parent | 4c9e25428ff46b968a30f1dfafdba550cb6e4141 (diff) | |
| download | lwn-4af4998b8aa35600f4c4a4f3c3a23baca6081d02.tar.gz lwn-4af4998b8aa35600f4c4a4f3c3a23baca6081d02.zip | |
perf_counter: rework context time
Since perf_counter_context is switched along with tasks, we can
maintain the context time without using the task runtime clock.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094518.353552838@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_counter.h')
| -rw-r--r-- | include/linux/perf_counter.h | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 0f5a4005048f..7f5d353d78ac 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -477,14 +477,10 @@ struct perf_counter_context { struct task_struct *task; /* - * time_now is the current time in nanoseconds since an arbitrary - * point in the past. For per-task counters, this is based on the - * task clock, and for per-cpu counters it is based on the cpu clock. - * time_lost is an offset from the task/cpu clock, used to make it - * appear that time only passes while the context is scheduled in. + * Context clock, runs when context enabled. */ - u64 time_now; - u64 time_lost; + u64 time; + u64 timestamp; #endif }; |