From: David Ahern <dsahern@gmail.com>
To: Jun Wang <junwang123@gmail.com>, linux-perf-users@vger.kernel.org
Subject: Re: stack trace of threads that wake up a specific target userspace thread blocking in epoll_wait
Date: Fri, 25 Apr 2014 11:01:20 -0600 [thread overview]
Message-ID: <535A94E0.2040008@gmail.com> (raw)
In-Reply-To: <CANHDG4anUmNmAxwx99fFTLCSFGNkENg6mZFun7N6dPZLGmSkqQ@mail.gmail.com>
On 4/25/14, 10:33 AM, Jun Wang wrote:
> I wonder whether there is a way to dump out the stack trace of
> threads, or some other kernel entities, that wake up that thread. The
> idea is to figure out why there is a huge delay by looking at how the
> delayed is ended, and by whom/what.
perf record -e sched:sched_wakeup* -e sched:sched_switch -ag
perf script
prev parent reply other threads:[~2014-04-25 17:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-25 16:33 stack trace of threads that wake up a specific target userspace thread blocking in epoll_wait Jun Wang
2014-04-25 17:01 ` David Ahern [this message]
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