Re: [RFC][PATCH 00/12] various perf fixes

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: [RFC][PATCH 00/12] various perf fixes
Date	2016-02-15 18:10 +0100
Message-ID	<r2uOT-3Y1-33@gated-at.bofh.it> (permalink)
References	(6 earlier) <qQN0T-5vL-33@gated-at.bofh.it> <r2ulQ-3v3-9@gated-at.bofh.it> <r2ulQ-3v3-7@gated-at.bofh.it> <r2ulQ-3v3-17@gated-at.bofh.it> <r2uFc-3Dw-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, Feb 15, 2016 at 5:52 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Mon, Feb 15, 2016 at 05:38:36PM +0100, Dmitry Vyukov wrote:
>> Just to compensate the pain, here is what I've just got when
>> re-enabled perf in my config :)
>>
>> 2016/02/15 16:52:18 qemu-15: saving crash 'WARNING: CPU: 0 PID: 18465
>> at kernel/events/core.c:2743 ctx_sched_in+0x255/0x17f0()' to
>> crash-qemu-15-1455551538366997265
>> 2016/02/15 16:54:02 qemu-17: saving crash 'WARNING: CPU: 0 PID: 1072
>> at kernel/events/core.c:2743 ctx_sched_in+0x255/0x17f0()' to
>> crash-qemu-17-1455551642205132730
>> 2016/02/15 16:54:44 qemu-30: saving crash 'WARNING: CPU: 3 PID: 19858
>> at kernel/events/core.c:2122 __perf_install_in_context+0x1c4/0x220()'
>> to crash-qemu-30-1455551684741709699
>> 2016/02/15 16:55:02 qemu-20: saving crash 'WARNING: CPU: 2 PID: 9873
>> at kernel/events/core.c:226 event_function+0x359/0x3e0()' to
>> crash-qemu-20-1455551702744185903
>
> That looks like a splat every minute or so. I've now had it run for
> almost 10 minutes and I've not seen anything except:
>
> 2016/02/15 17:26:25 local-0: saving crash 'not executing programs' to crash-local-0-1455553585720015733
> 2016/02/15 17:29:25 local-0: saving crash 'not executing programs' to crash-local-0-1455553765740119317
> 2016/02/15 17:32:25 local-0: saving crash 'not executing programs' to crash-local-0-1455553945767974819
> 2016/02/15 17:35:25 local-0: saving crash 'not executing programs' to crash-local-0-1455554125793957186
>
> And those files are completely empty of useful.

There is something wrong and I guess it is not actually working.
Please post your config file so that I can double check. In
particular, did you set "cover": false?

Thread

Re: [RFC][PATCH 00/12] various perf fixes Dmitry Vyukov <dvyukov@google.com> - 2016-02-15 17:40 +0100
  Re: [RFC][PATCH 00/12] various perf fixes Dmitry Vyukov <dvyukov@google.com> - 2016-02-15 17:40 +0100
    Re: [RFC][PATCH 00/12] various perf fixes Peter Zijlstra <peterz@infradead.org> - 2016-02-15 18:00 +0100
      Re: [RFC][PATCH 00/12] various perf fixes Peter Zijlstra <peterz@infradead.org> - 2016-02-15 18:10 +0100
        Re: [RFC][PATCH 00/12] various perf fixes Peter Zijlstra <peterz@infradead.org> - 2016-02-15 19:10 +0100
          Re: [RFC][PATCH 00/12] various perf fixes Dmitry Vyukov <dvyukov@google.com> - 2016-02-15 19:40 +0100
      Re: [RFC][PATCH 00/12] various perf fixes Dmitry Vyukov <dvyukov@google.com> - 2016-02-15 18:10 +0100
  Re: [RFC][PATCH 00/12] various perf fixes Peter Zijlstra <peterz@infradead.org> - 2016-02-15 17:50 +0100
    Re: [RFC][PATCH 00/12] various perf fixes Dmitry Vyukov <dvyukov@google.com> - 2016-02-15 18:00 +0100
      Re: [RFC][PATCH 00/12] various perf fixes Peter Zijlstra <peterz@infradead.org> - 2016-02-15 18:10 +0100

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