Re: [sup-devel] really high wakeup count in powertop

[Gaute Hope <eg@gaute.vetsj.com>]

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