From: Arun Sharma <asharma@fb.com>
To: Stephane Eranian <eranian@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>, <mingo@elte.hu>,
William Cohen <wcohen@redhat.com>,
Vince Weaver <vince@deater.net>, <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH 0/6] perf: x86 RDPMC and RDTSC support
Date: Mon, 5 Dec 2011 12:16:57 -0800 [thread overview]
Message-ID: <4EDD26B9.8070007@fb.com> (raw)
In-Reply-To: <CABPqkBRpYA-StOTDFwyFhFtBPynbn-FLUzqZvaQn3oM3SJpCWg@mail.gmail.com>
On 12/2/11 2:22 PM, Stephane Eranian wrote:
> Have you tried with inheritance disabled?
> I don't remember if perf stat has it enabled buy default.
Disabling inheritance using the -i switch as in:
(for i in `seq 1 10`; do numactl --cpunodebind 1 perf stat -i -e
instructions ./lat_ctx -P1 -s32k 4; done)
shows numbers closer to baseline, since the threads used for
benchmarking are not counting events.
This suggests that:
jump_label_dec(&perf_task_events);
itself doesn't hurt much.
-Arun
next prev parent reply other threads:[~2011-12-05 20:17 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-21 14:51 [RFC][PATCH 0/6] perf: x86 RDPMC and RDTSC support Peter Zijlstra
2011-11-21 14:51 ` [RFC][PATCH 1/6] perf: Update the mmap control page on mmap() Peter Zijlstra
2011-11-21 14:51 ` [RFC][PATCH 2/6] perf, arch: Rework perf_event_index() Peter Zijlstra
2011-11-21 16:22 ` Eric B Munson
2011-11-21 17:23 ` Will Deacon
2011-11-21 19:18 ` Peter Zijlstra
2011-11-21 20:31 ` Will Deacon
2011-11-21 20:35 ` Peter Zijlstra
2011-11-21 22:43 ` Will Deacon
2011-11-22 11:26 ` Peter Zijlstra
2011-11-22 11:47 ` Will Deacon
2011-11-22 11:49 ` Oleg Strikov
2011-11-22 11:52 ` Will Deacon
2011-11-22 11:56 ` Oleg Strikov
2011-11-22 12:00 ` Oleg Strikov
2011-11-22 12:14 ` Will Deacon
2011-11-22 12:25 ` Oleg Strikov
2011-11-22 11:51 ` Peter Zijlstra
2011-11-22 11:54 ` Will Deacon
2011-11-22 11:48 ` Oleg Strikov
2011-11-21 14:51 ` [RFC][PATCH 3/6] perf, x86: Implement userspace RDPMC Peter Zijlstra
2011-11-21 14:51 ` [RFC][PATCH 4/6] perf, x86: Provide means of disabling " Peter Zijlstra
2011-11-21 14:51 ` [RFC][PATCH 5/6] perf: Extend the mmap control page with time (TSC) fields Peter Zijlstra
2011-12-28 17:55 ` Stephane Eranian
2011-11-21 14:51 ` [RFC][PATCH 6/6] perf, tools: X86 RDPMC, RDTSC test Peter Zijlstra
2011-11-21 15:29 ` Stephane Eranian
2011-11-21 15:37 ` Peter Zijlstra
2011-11-21 16:59 ` Peter Zijlstra
2011-11-21 17:42 ` Stephane Eranian
2011-11-21 15:02 ` [RFC][PATCH 0/6] perf: x86 RDPMC and RDTSC support Vince Weaver
2011-11-21 16:05 ` William Cohen
2011-11-21 16:08 ` William Cohen
2011-12-02 19:26 ` Arun Sharma
2011-12-02 22:22 ` Stephane Eranian
2011-12-05 20:16 ` Arun Sharma [this message]
2011-12-05 23:17 ` Arun Sharma
2011-12-06 1:38 ` Stephane Eranian
2011-12-06 9:42 ` Peter Zijlstra
2011-12-06 21:53 ` Arun Sharma
2011-12-16 22:36 ` Vince Weaver
2011-12-21 12:58 ` Peter Zijlstra
2011-12-21 13:15 ` Ingo Molnar
2011-12-23 20:12 ` Vince Weaver
2011-12-21 15:04 ` Vince Weaver
2011-12-21 21:32 ` Vince Weaver
2011-12-21 21:41 ` Peter Zijlstra
2011-12-21 22:19 ` Vince Weaver
2011-12-21 22:32 ` Peter Zijlstra
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