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From: David Ahern <dsahern@gmail.com>
To: William Cohen <wcohen@redhat.com>,
	"linux-perf-use." <linux-perf-users@vger.kernel.org>
Cc: 大平怜 <rei.odaira@gmail.com>
Subject: Re: Issue perf attaching to processes creating many short-live threads
Date: Fri, 23 Oct 2015 12:56:53 -0600	[thread overview]
Message-ID: <562A82F5.8090306@gmail.com> (raw)
In-Reply-To: <562A81ED.70900@redhat.com>

On 10/23/15 12:52 PM, William Cohen wrote:
> Earlier this month Rei Odeira found that the oprofile tool operf would
> have problems attaching and monitoring a process that created many
> very short-lived threads.  It looks like the kernel's perf tool also
> has issues when attempting to attach and monitor a process that is
> creating many short-lived threads.

known a problem. If this is the problem I think it is you will find that 
strace shows perf stuck walking /proc directory.

David

  reply	other threads:[~2015-10-23 18:56 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-23 18:52 Issue perf attaching to processes creating many short-live threads William Cohen
2015-10-23 18:56 ` David Ahern [this message]
2015-10-23 19:27   ` William Cohen
2015-10-23 19:35     ` David Ahern
2015-10-26 19:49       ` Arnaldo Carvalho de Melo
2015-10-26 21:42         ` David Ahern
2015-10-27 12:33           ` Arnaldo Carvalho de Melo
2015-10-27 14:15             ` David Ahern
2015-10-27 14:47               ` Arnaldo Carvalho de Melo

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