Re: [tip:perf/core] perf/ftrace: Optimize perf/tracepoint interaction for single events

Peter Zijlstra
2010-05-19T08:19:23Z

On Wed, 2010-05-19 at 09:58 +0200, Frederic Weisbecker wrote:
> On Tue, May 18, 2010 at 05:15:42PM +0000, tip-bot for Peter Zijlstra wrote:
> > Commit-ID: 4f41c013f553957765902fb01475972f0af3e8e7
> > Gitweb: http://git.kernel.org/tip/4f41c013f553957765902fb01475972f0af3e8e7
> > Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
> > AuthorDate: Tue, 18 May 2010 18:08:32 +0200
> > Committer: Ingo Molnar <mingo@elte.hu>
> > CommitDate: Tue, 18 May 2010 18:35:46 +0200
> >
> > perf/ftrace: Optimize perf/tracepoint interaction for single events
> >
> > When we've got but a single event per tracepoint
> > there is no reason to try and multiplex it so don't.
> >

> I haven't seen this patch going.
>
> But yeah that's a nice optimization for UP machines.

Uhm, doesn't have anything to do with UP machines... it works quite well
on SMP as well.

Its about tracepoints with a single event attached.