From: David Ahern <dsahern@gmail.com>
To: Tim Chen <tim.c.chen@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
linux-perf-users@vger.kernel.org, ak <ak@linux.intel.com>
Subject: Re: Perf record premature termination
Date: Mon, 11 Feb 2013 12:05:50 -0700 [thread overview]
Message-ID: <5119410E.1010908@gmail.com> (raw)
In-Reply-To: <1360608612.17632.193.camel@schen9-DESK>
On 2/11/13 11:50 AM, Tim Chen wrote:
> David,
>
> When I am doing a profiling of kernel compile with 32 threads on a 4
> socket westmere machine, I found that perf record terminated right away
> for the version of perf in 3.7 kernel source tree.
> There's no profile data recroded and the compile is running in
> background.
>
> $ make -j32 &
> then
> $ sudo /test/perf record -a -g -f sleep 5
> sleep: Terminated
>
Race condition collecting the initial thread data:
$ su -c '/tmp/perf-3.7/perf record -a -g -f -o /tmp/perf.data -v sleep 5'
Password:
couldn't open /proc/22518/status
couldn't open /proc/22518/task
couldn't open /proc/22518/maps
sleep: Terminated
David
next prev parent reply other threads:[~2013-02-11 19:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-11 18:50 Perf record premature termination Tim Chen
2013-02-11 19:05 ` David Ahern [this message]
2013-02-11 19:34 ` David Ahern
2013-02-11 22:15 ` Tim Chen
2013-02-11 22:30 ` David Ahern
2013-02-12 17:07 ` Tim Chen
2013-02-12 17:16 ` David Ahern
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