On Fri, May 16, 2003 at 05:09:54PM -0400, James D. Freels wrote: > I have a dual-Xeon (hyperthread) processor system on an Intel serverboard. > When booted up under kernel 2.4.20, the top output indicates 4 processors are > running. I can toggle the output using the "1" key to show all processors > combined, or 4 independent processors. > > When I boot up under the 2.5.69 kernel (there does not appear to be a HT > switch in the menuconfig, but I do have CONFIG_X86_HT=y in the .config file), > the top command only shows 2 processors running. Obvious: Do you have SMP enabled? > Questions: > > Does this mean that hyperthreading is not enabled ? What does 'dmesg' say? > If hyperthreading is enabled, and I have two physical processors, should the > top command show 4 processors running ? Yes. As far as I know, anyway, I've never had the pleasure to play with one of those beasts :) > Why is the top output different between 2.4.20 and 2.5.69 ? I don't know. If you can't find an obvious answer (and no one else seems to have come up with one in the past week), then you should definitelty contact lkml about this. -- Rob Weir <rweir@ertius.org> | mlspam@ertius.org | http://www.ertius.org/ GPG keys: 1024D/1E73B7CD, 4096R/3ABDE5EC | Do I look like I want a CC? Words of the day: plutonium SDI csim Mafia Verisign Rubin counter terrorism
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