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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=535A94E0.2040008@gmail.com \
--to=dsahern@gmail.com \
--cc=junwang123@gmail.com \
--cc=linux-perf-users@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.