From: Gaute Hope <eg@gaute.vetsj.com>
To: sup-devel <sup-devel@rubyforge.org>
Subject: Re: [sup-devel] really high wakeup count in powertop
Date: Wed, 10 Nov 2010 17:13:48 +0100 [thread overview]
Message-ID: <1289405570-sup-2035@qwerzila> (raw)
In-Reply-To: <1289399902-sup-201@think>
Excerpts from Chris Mason's message of 2010-11-10 15:41:30 +0100:
> strace showed we were hammering on futexes, and a little digging made it
> clear sup isn't to blame. The ruby timer thread is polling for
> signals (or something) every 10ms:
>
> http://redmine.ruby-lang.org/issues/show/3436
>
> I patched up ruby to poll every 500ms and things seem to work. Not sure
> why the ruby developers didn't just change the timeout, but chances are
> good they have a real reason. I'll post to that bug.
Also noticed sup in powertop; so there's nothing to do on the Sup side ?
- gaute
next prev parent reply other threads:[~2010-11-10 16:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-10 0:40 Chris Mason
2010-11-10 14:41 ` Chris Mason
2010-11-10 16:13 ` Gaute Hope [this message]
2010-11-10 18:35 ` William Morgan
2010-11-10 20:18 ` Chris Mason
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