Date: Mon, 21 Jul 2014 10:28:56 -0400 From: Edwin Brown <edwin.brown@gmail.com> To: Garrett Wollman <wollman@hergotha.csail.mit.edu> Cc: "jdc@koitsu.org" <jdc@koitsu.org>, "stable@freebsd.org" <stable@freebsd.org> Subject: Re: Consistently "high" CPU load on 10.0-STABLE Message-ID: <72ABE5EB-9F5C-45E6-9FD2-8C3113398528@gmail.com> In-Reply-To: <201407210348.s6L3mHnF020806@hergotha.csail.mit.edu> References: <20140720062413.GA56318@icarus.home.lan> <CALCpEUHfC1zebCCFrk224Y=MoFznMMPKLM-jN-pNqWFyByOphg@mail.gmail.com> <201407210348.s6L3mHnF020806@hergotha.csail.mit.edu>
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I've also seen this behavior in 10.0 stable. Currently running r268853. I've had the same behavior since 10.0 release and never thought much about it other than the fact that it didn't seem "normal". This machine is a test machine and I'd be happy to run some tests for people if that might help. My kernel debugging skills are limited. But I have some spare time and a computer I can destroy if need be Thanks Ed > On Jul 20, 2014, at 11:48 PM, Garrett Wollman <wollman@hergotha.csail.mit.edu> wrote: > > In article <20140720235945.GA90603@icarus.home.lan> you write: > >> Yeah, I've given that a try. I think all that script does, in layman's >> terms, is count the number of occurrences of a kernel function/symbol >> being called. > > I've had good results in the past using pmcstat(8) in "top" mode. Of > course you'll need a kernel with the PMC support compiled in to use > that, and a CPU where hwpmc(4) supports a useful counter -- I'd start > with something that counts unhalted cycles or retired instructions. > > -GAWollman > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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