From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
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
Message-ID: <535A94E0.2040008@gmail.com>
References: <CANHDG4anUmNmAxwx99fFTLCSFGNkENg6mZFun7N6dPZLGmSkqQ@mail.gmail.com>
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To: Jun Wang <junwang123@gmail.com>, linux-perf-users@vger.kernel.org

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