[sup-devel] really high wakeup count in powertop
eg at gaute.vetsj.com
Wed Nov 10 11:13:48 EST 2010
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:
> 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 ?
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