Date: Tue, 25 Jan 2011 01:02:46 +0000 From: Craig Butler <craig001@lerwick.hopto.org> To: Chad Perrin <perrin@apotheon.com> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: more CPU being used than I have (?) Message-ID: <1295917366.59721.2.camel@main> In-Reply-To: <20110124235740.GA62134@guilt.hydra> References: <20110124235740.GA62134@guilt.hydra>
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On Mon, 2011-01-24 at 16:57 -0700, Chad Perrin wrote: > I'm running a two-core laptop that, once in a great while, shows > approximately 250% CPU usage by a single process in top. How exactly > does that work? > > Note: It's not entirely surprising that this particular process is > consuming a lot of resources. It's just surprising to me that it's > consuming more than CPUs * 100%. Hi Chad Its to do with top using weighted CPU percentage... for some reason this show peaks as more usage than 100% -- maybe something to do with the top averaging out over a specific time. I find that raw CPU mode gives a more accurate representation. raw mode is toggled by passing the -C argument to top. Regards Craig Butler
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