From: Peter Zijlstra <peterz@infradead.org>
To: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: perf: massive perf_event slowdown between 4.9 and 4.11-rc
Date: Thu, 16 Mar 2017 19:49:18 +0100 [thread overview]
Message-ID: <20170316184918.5dy7l5k2t5tkptib@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <alpine.DEB.2.20.1703161356180.695@macbook-air>
On Thu, Mar 16, 2017 at 01:57:31PM -0400, Vince Weaver wrote:
> On Thu, 16 Mar 2017, Vince Weaver wrote:
>
> > Anyway all perf_event functionality (especially reads) has become about
> > 20x slower, at least on Intel machines (haswell and skylake are the only
> > ones I've tested) sometime between 4.9 and 4.11-rc
>
> False alarm, I forgot I had debugging (KASAN, etc) turned on in this
> kernel tree because I had been fuzzing.
>
> sorry about that.
Ha! no problem.
next prev parent reply other threads:[~2017-03-16 18:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-16 15:54 Vince Weaver
2017-03-16 17:57 ` Vince Weaver
2017-03-16 18:49 ` Peter Zijlstra [this message]
2017-03-16 18:14 ` Peter Zijlstra
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