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From: David Ahern <dsahern@gmail.com>
To: Namhyung Kim <namhyung@gmail.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>,
	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 07/13] perf evlist: Fix creation of cpu map
Date: Thu, 26 Apr 2012 15:22:55 -0600	[thread overview]
Message-ID: <4F99BCAF.1080309@gmail.com> (raw)
In-Reply-To: <1335474778.1497.14.camel@leonhard>

On 4/26/12 3:12 PM, Namhyung Kim wrote:
> Hmm.. No, I can reproduce it without any of this series. And now I think
> that it is not related to the number of cpus. On my 4 core (no
> hyperthreading) machine at home, the result was same.
>
> BTW, did you change sysctl settings?
>
>    $ cat /sys/devices/system/cpu/online
>    0-3
>    $ grep . /proc/sys/kernel/perf_event_*
>    /proc/sys/kernel/perf_event_max_sample_rate:100000
>    /proc/sys/kernel/perf_event_mlock_kb:516
>    /proc/sys/kernel/perf_event_paranoid:1

$ grep . /proc/sys/kernel/perf_event_*
/proc/sys/kernel/perf_event_max_sample_rate:100000
/proc/sys/kernel/perf_event_mlock_kb:516
/proc/sys/kernel/perf_event_paranoid:-1

That last one is the key. I have it set to not paranoid and usually run 
perf a non-root user.

>    $ ./perf test 7
>     7: Validate PERF_RECORD_* events&  perf_sample fields: FAILED!
>    $ ./perf --version
>    perf version 3.4.rc1

running 3.4-rc4 kernel + perf from tip/perf/core branch.

David

  reply	other threads:[~2012-04-26 21:23 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-26  5:15 [RFC PATCHSET 00/13] perf tools: Fix cpu/thread map handling v2 Namhyung Kim
2012-04-26  5:15 ` [PATCH 01/13] perf tools: Introduce struct perf_target Namhyung Kim
2012-05-11  6:27   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 02/13] perf stat: Convert to " Namhyung Kim
2012-05-11  6:28   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 03/13] perf top: " Namhyung Kim
2012-05-11  6:29   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 04/13] perf tools: Introduce perf_target__validate() helper Namhyung Kim
2012-05-11  6:30   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 05/13] perf tools: Make perf_evlist__create_maps() take struct perf_target Namhyung Kim
2012-05-11  6:31   ` [tip:perf/core] perf evlist: Make create_maps() " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 06/13] perf tools: Check more combinations of PID/TID, UID and CPU switches Namhyung Kim
2012-05-11  6:32   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 07/13] perf evlist: Fix creation of cpu map Namhyung Kim
2012-04-26 15:05   ` David Ahern
2012-04-26 21:12     ` Namhyung Kim
2012-04-26 21:22       ` David Ahern [this message]
2012-04-27  0:16         ` Namhyung Kim
2012-04-27 15:08           ` Arnaldo Carvalho de Melo
2012-04-27 15:32             ` David Ahern
2012-04-27 16:00               ` Arnaldo Carvalho de Melo
2012-04-27 16:05                 ` David Ahern
2012-04-27 16:09                   ` Arnaldo Carvalho de Melo
2012-05-02 18:40           ` Arnaldo Carvalho de Melo
2012-05-04  4:05             ` Namhyung Kim
2012-05-04 13:37               ` Arnaldo Carvalho de Melo
2012-05-04 13:53                 ` Namhyung Kim
2012-04-26  5:15 ` [PATCH 08/13] perf target: Split out perf_target handling code Namhyung Kim
2012-05-02 18:30   ` Arnaldo Carvalho de Melo
2012-05-03 14:39     ` Namhyung Kim
2012-05-03 15:27       ` Arnaldo Carvalho de Melo
2012-05-03 15:30         ` Namhyung Kim
2012-05-11  6:33   ` [tip:perf/core] " tip-bot for Namhyung Kim
2012-04-26  5:15 ` [PATCH 09/13] perf target: Introduce perf_target_errno Namhyung Kim
2012-05-02 18:59   ` Arnaldo Carvalho de Melo
2012-05-03 14:47     ` Namhyung Kim
2012-05-03 20:34     ` David Ahern
2012-05-03 20:42       ` Arnaldo Carvalho de Melo
2012-05-03 20:49         ` David Ahern
2012-04-26  5:15 ` [PATCH 10/13] perf target: Introduce perf_target__parse_uid() Namhyung Kim
2012-04-26  5:15 ` [PATCH 11/13] perf tools: Introduce perf_target__strerror() Namhyung Kim
2012-04-26  5:15 ` [PATCH 12/13] perf target: Consolidate target task/cpu checking Namhyung Kim
2012-04-26  5:15 ` [PATCH 13/13] perf stat: Use perf_evlist__create_maps Namhyung Kim

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