Messages in this thread | | | Date | Thu, 12 Jan 2017 10:11:37 +0000 | From | Mark Rutland <> | Subject | Re: [RFC 3/6] perf/core: use rb-tree to sched in event groups |
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On Wed, Jan 11, 2017 at 08:31:11PM +0000, Liang, Kan wrote:
> > Kan, in your per-cpu event list patch you mentioned that you saw a large > > overhead in perf_iterate_ctx() when skipping events for other CPUs. > > Which callers of perf_iterate_ctx() specifically was that problematic for? Do > > those callers only care about the *active* events, for example? > > Based on my test, the large overhead was observed in perf_iterate_sb. > Yes, it only cares about the *active* events.
Great!
That should mean the first patch of this series (adding the active events lists) should give us sufficient infrastructure to solve that particular issue.
Thanks, Mark.
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