Messages in this thread | | | Date | Wed, 30 Apr 2003 22:41:49 +0100 | From | Andrew Walrond <> | Subject | Re: Measuring CPU with Hyperthreading and Linux |
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Run top, then press 1 to get a 'per cpu' usage line, rather than the default combined thing.
Obviously you'll need a threaded app to take advantage of the processors, and preferably a 2.5 kernel with Ingo's HT scheduler patch...
Andrew
Matthew A. Miling wrote: > Hello > > Please personally CC my email address to any responses: > mamiling@syr.edu > > I am currently running a dual Pentium 4 Xeon 2.4 GHz system containing Red Hat > Linux 6.2 with the 2.4.20 kernel. The Pentium 4 Xeons report 4 cpu's to > /proc/cpuinfo because they are hyperthreaded. > > My problem lies in trying to measure the CPU usage with such programs as top > or gtop. Typically, I see CPU loads in excess of 100% when I run top with > some of my signal processing applications, but not more than 200%. Is this > value out of 100%, 200%, or 400%? How does this dual, HT system kernel report > this info to the OS? > > Any help would be appreciated. Thanks >
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