Re: [tip:perf/core] perf/ftrace: Optimize perf/tracepoint interaction for single events
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- Subject: Re: [tip:perf/core] perf/ftrace: Optimize perf/tracepoint interaction for single events
- From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
- Date: Wed, 19 May 2010 11:13:35 +0200
- Cc: mingo@xxxxxxxxxx, hpa@xxxxxxxxx, paulus@xxxxxxxxx, acme@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, efault@xxxxxx, rostedt@xxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxx, linux-tip-commits@xxxxxxxxxxxxxxx
- In-reply-to: <1274260348.5605.10379.camel@twins>
- References: <tip-4f41c013f553957765902fb01475972f0af3e8e7@xxxxxxxxxxxxxx> <20100519075804.GF5704@nowhere> <1274257123.5605.10260.camel@twins> <20100519082335.GG5704@nowhere> <1274259525.5605.10352.camel@twins> <20100519090654.GK5704@nowhere> <1274260348.5605.10379.camel@twins>
- User-agent: Mutt/1.5.18 (2008-05-17)
On Wed, May 19, 2010 at 11:12:28AM +0200, Peter Zijlstra wrote:
> On Wed, 2010-05-19 at 11:06 +0200, Frederic Weisbecker wrote:
> > On Wed, May 19, 2010 at 10:58:45AM +0200, Peter Zijlstra wrote:
> > > How about something like the below?
> > >
> > >
> > > ---
> > > Subject: perf, trace: Remove IRQ-disable from perf/tracepoint interaction
> > > From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> > > Date: Wed May 19 10:52:27 CEST 2010
> > >
> > >
> > >
> > > Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> > > ---
> >
> >
> >
> > Looks fine if we don't have nested irqs.
>
> Well, I was thinking the per-context recursion thing would sort that
> out. We can have 1 event per context in-flight.
Ah good point.
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