Date: Mon, 25 May 2009 21:37:48 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Peter Boosten <peter@boosten.org> Cc: Yuri <yuri@rawbw.com>, Scott Bennett <bennett@cs.niu.edu>, freebsd-questions@freebsd.org, utisoft@gmail.com Subject: Re: How can this 'top' command output make sense? Load over 7 and total CPU use ~5% Message-ID: <alpine.BSF.2.00.0905252135050.41170@wojtek.tensor.gdynia.pl> In-Reply-To: <EEB4E0E6-E903-4FCD-A583-2A17ACE9E902@boosten.org> References: <200905241315.n4ODFB96007801@mp.cs.niu.edu> <alpine.BSF.2.00.0905242021440.33060@wojtek.tensor.gdynia.pl> <b79ecaef0905250104p55c302cdh102202d1a06a389b@mail.gmail.com> <alpine.BSF.2.00.0905251013500.36458@wojtek.tensor.gdynia.pl> <b79ecaef0905250133n5cd641dv6ca8e088f8fa2f33@mail.gmail.com> <4A1A58FA.60303@boosten.org> <alpine.BSF.2.00.0905251912000.40022@wojtek.tensor.gdynia.pl> <C9B964A3-BE91-4518-B13C-EE28282FD810@boosten.org> <alpine.BSF.2.00.0905252107590.40989@wojtek.tensor.gdynia.pl> <1932D812-03CF-48AF-A306-669C39862EB7@boosten.org> <alpine.BSF.2.00.0905252119520.41069@wojtek.tensor.gdynia.pl> <EEB4E0E6-E903-4FCD-A583-2A17ACE9E902@boosten.org>
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> The CPU = "Central Processing Unit" will perform it's calculations at so many > megahertz while at 10% utilization or at 100% utilization. The entire machine no. it will not. all today x86 CPUs reacts on HLT command and doesn't do anything except waiting for interrupt (and saving lots of power). > is only performing at 10% of its capacity, in your statement above. no - CPU is performing at 10% of it's capacity. entire machine (disks, network etc.) is another thing. >> > > Actually, it's a combination of both running and waiting processes. yes that's true. i missed this - all waiting for machine resource to be available+those which are presently calculating something.
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