Messages in this thread Patch in this message | | | Date | Sun, 3 Feb 2013 11:22:41 -0800 | From | tip-bot for Namhyung Kim <> | Subject | [tip:perf/core] tracing: Use sched_clock_cpu for trace_clock_global |
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Commit-ID: 5e67b51e3fb22ad43faf9589e9019ad9c6a00413 Gitweb: http://git.kernel.org/tip/5e67b51e3fb22ad43faf9589e9019ad9c6a00413 Author: Namhyung Kim <namhyung.kim@lge.com> AuthorDate: Thu, 27 Dec 2012 11:49:45 +0900 Committer: Steven Rostedt <rostedt@goodmis.org> CommitDate: Wed, 30 Jan 2013 11:02:05 -0500
tracing: Use sched_clock_cpu for trace_clock_global
For systems with an unstable sched_clock, all cpu_clock() does is enable/ disable local irq during the call to sched_clock_cpu(). And for stable systems they are same.
trace_clock_global() already disables interrupts, so it can call sched_clock_cpu() directly.
Link: http://lkml.kernel.org/r/1356576585-28782-2-git-send-email-namhyung@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- kernel/trace/trace_clock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c index 22b638b..24bf48e 100644 --- a/kernel/trace/trace_clock.c +++ b/kernel/trace/trace_clock.c @@ -84,7 +84,7 @@ u64 notrace trace_clock_global(void) local_irq_save(flags); this_cpu = raw_smp_processor_id(); - now = cpu_clock(this_cpu); + now = sched_clock_cpu(this_cpu); /* * If in an NMI context then dont risk lockups and return the * cpu_clock() time:
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