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

Frederic Weisbecker
2010-05-19T07:58:07Z

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.
>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Tested-by: Ingo Molnar <mingo@elte.hu>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Mike Galbraith <efault@gmx.de>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> LKML-Reference: <new-submission>
> Signed-off-by: Ingo Molnar <mingo@elte.hu>
> ---

I haven't seen this patch going.

But yeah that's a nice optimization for UP machines.