linux-kernel - Re: [PATCH 3/4] perf-events: Add support for supplementary event registers v3

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Message-ID: <1291220357.32004.1683.camel@laptop>
Date:	Wed, 01 Dec 2010 17:19:17 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	eranian@...gle.com, linux-kernel@...r.kernel.org, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 3/4] perf-events: Add support for supplementary event
 registers v3

On Wed, 2010-12-01 at 15:27 +0100, Peter Zijlstra wrote:
> On Thu, 2010-11-18 at 11:47 +0100, Andi Kleen wrote:
> > @@ -876,6 +944,8 @@ static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc,
> >                                           u64 enable_mask)
> >  {
> >         wrmsrl(hwc->config_base + hwc->idx, hwc->config | enable_mask);
> > +       if (hwc->extra_reg)
> > +               wrmsrl(hwc->extra_reg, hwc->extra_config);
> >  } 
> 
> I thought we agreed it made more sense to program the extra msr before
> enabling the counter.

Ah sorry, I seem to have mixed up the various versions.

The latest does indeed do as we agreed. Sorry for the noise.
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