From: Andi Kleen <andi@firstfloor.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>,
mingo@kernel.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>,
eranian@google.com
Subject: Re: [PATCH] perf, x86: Enable PEBS mode automatically for mem-{loads,stores} v3
Date: Tue, 23 Jul 2013 18:13:34 +0200 [thread overview]
Message-ID: <20130723161334.GQ6123@two.firstfloor.org> (raw)
In-Reply-To: <20130723083834.GS27075@twins.programming.kicks-ass.net>
On Tue, Jul 23, 2013 at 10:38:34AM +0200, Peter Zijlstra wrote:
> On Thu, Jul 18, 2013 at 04:03:39PM -0700, Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > [The patch to enable this in the user tools has been sent separately]
> >
> > With the earlier patches to automatically try cpu// and add
> > a precise sys attribute, we can now enable PEBS for the mem-loads,
> > mem-stores events everywhere.
> >
> > This allows to use
> >
> > perf record -e mem-loads ...
> >
> > instead of
> >
> > perf record -e cpu/mem-loads/p ...
> >
> > Always use precise=2 even though it is costly pre-Haswell
>
> This Changelog fails to give a reason _why_ we'd want to do this.
The first is much nicer to type and understand? Just in the spirit of
making perf easier to use.
-andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2013-07-23 16:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-18 23:03 [PATCH] perf, x86: Enable PEBS mode automatically for mem-{loads,stores} v3 Andi Kleen
2013-07-19 7:46 ` Ingo Molnar
2013-07-23 8:38 ` Peter Zijlstra
2013-07-23 16:13 ` Andi Kleen [this message]
2013-07-23 16:57 ` Peter Zijlstra
2013-07-23 17:46 ` Stephane Eranian
2013-07-23 19:14 ` Andi Kleen
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