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.=20 I've had the same behavior since 10.0 release and never thought much about i= t other than the fact that it didn't seem "normal".=20 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 som= e spare time and a computer I can destroy if need be=20 Thanks=20 Ed=20 > On Jul 20, 2014, at 11:48 PM, Garrett Wollman <wollman@hergotha.csail.mit.= edu> wrote: >=20 > In article <20140720235945.GA90603@icarus.home.lan> you write: >=20 >> 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. >=20 > 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. >=20 > -GAWollman >=20 > _______________________________________________ > 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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