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Date: Fri, 25 Oct 2013 19:03:06 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Don Zickus <dzickus@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Andi Kleen <ak@linux.intel.com>, dave.hansen@linux.intel.com,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Arnaldo Carvalho de Melo <acme@infradead.org>,
        Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH] perf, x86: Optimize intel_pmu_pebs_fixup_ip()
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On Fri, Oct 25, 2013 at 12:33:03PM -0400, Don Zickus wrote:
> Hi Peter,
> 
> I finally had a chance to run this on my machine.  From my testing, it
> looks good.  Better performance numbers.  I think my longest latency went
> from 300K cycles down to 150K cycles and very few of those (most are under
> 100K cycles).
> 
> I also don't see perf throttling me down to 1500 samples, it stops around
> 7000.  So I see progress with this patch. :-)

Awesome.. I'll write up a proper patch when I'm back home.