Date: Sun, 20 Jul 2014 23:48:17 -0400 (EDT) From: Garrett Wollman <wollman@hergotha.csail.mit.edu> To: jdc@koitsu.org Cc: stable@freebsd.org Subject: Re: Consistently "high" CPU load on 10.0-STABLE Message-ID: <201407210348.s6L3mHnF020806@hergotha.csail.mit.edu> In-Reply-To: <20140720235945.GA90603@icarus.home.lan> References: <20140720062413.GA56318@icarus.home.lan> <CALCpEUHfC1zebCCFrk224Y=MoFznMMPKLM-jN-pNqWFyByOphg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201407210348.s6L3mHnF020806>