Re: Intermittent perf build failures

From	Laura Abbott <labbott@redhat.com>
Newsgroups	linux.kernel
Subject	Re: Intermittent perf build failures
Date	2016-10-12 20:20 +0200
Message-ID	<srwid-838-5@gated-at.bofh.it> (permalink)
References	<src9Q-2XG-11@gated-at.bofh.it> <srcjw-30Y-5@gated-at.bofh.it> <sroNH-33M-13@gated-at.bofh.it> <sroNH-33M-11@gated-at.bofh.it>
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On 10/12/2016 03:12 AM, Jiri Olsa wrote:
> On Tue, Oct 11, 2016 at 02:18:49PM -0700, Laura Abbott wrote:
>> On 10/11/2016 01:59 PM, Jiri Olsa wrote:
>>> On Tue, Oct 11, 2016 at 01:43:36PM -0700, Laura Abbott wrote:
>>>> Hi,
>>>>
>>>> While building today's Fedora rawhide kernel, there was a failure
>>>> building perf with -j4 [1]:
>
> ok, the -j 4 is the problem
>
> running "make -j 4  install-bin install-traceevent-plugins"
>
>   BUILD:   Doing 'make -j4' parallel build
>   BUILD:   Doing 'make -j4' parallel build
>
> will run paralel make instances for install-bin and install-traceevent-plugins
> which will eventually touch same files and crash..
>
> the main perf Makefile is actualy detecting number of cpus
> and runs Makefile.perf with -j X option so there's no need
> to specify it on top level.. you can always customize it via
> JOBS=X make variable
>
> so if you don't specify the -j X option it will run the
> 'Makefile.perf install-bin install-traceevent-plugins' with
> -j X set and it should execute sequentialy and fix your problem
>

Thanks for pointing that out. The build command has been there
a while and apparently has bit rotted. I've removed the extra
-j X flags from the command.

> thanks,
> jirka
>

Thanks,
Laura

Thread

Intermittent perf build failures Laura Abbott <labbott@redhat.com> - 2016-10-11 22:50 +0200
  Re: Intermittent perf build failures Jiri Olsa <jolsa@redhat.com> - 2016-10-11 23:00 +0200
    Re: Intermittent perf build failures Jiri Olsa <jolsa@redhat.com> - 2016-10-12 12:20 +0200
      Re: Intermittent perf build failures Laura Abbott <labbott@redhat.com> - 2016-10-12 20:20 +0200
        Re: Intermittent perf build failures Ingo Molnar <mingo@kernel.org> - 2016-10-16 09:20 +0200
          Re: Intermittent perf build failures Jiri Olsa <jolsa@redhat.com> - 2016-10-16 17:10 +0200

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