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Date: Wed, 10 Jan 2018 16:21:49 +0100
From: Jiri Olsa <jolsa@redhat.com>
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Cc: Peter Zijlstra <peterz@infradead.org>, mingo@redhat.com,
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Subject: Re: Php-fpm will crash when perf runs with call graph option
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On Tue, Dec 26, 2017 at 10:29:34AM +0800, 禹舟键 wrote:
> Hi, Jirka
> This issue happens  always. The perf is running on the host machine and the
> command line is as follow:
> 
>          $perf record -ag -F 100
> 
> But I do not find anything about race condition from the call stack in gdb.
> The only thing I find is that some functions' rbp is really strange(0x1,
> 0x31).
> 
> There is a simple method to reproduce this issue. Just run a docker in a
> server(OS : centos7.3), and run php-fpm(php-7.0.6)  in the docker, then run
> some shell scripts from another server to send data package to the php-fpm
> in the docker. When perf runs on the server which contains the docker, the
> php-fpm will crash in just several seconds.

could you provide exact steps/commands for this?

thanks,
jirka