On Thursday 04 December 2003 17:53, Yeak Nai Siew wrote: > Then I run "top" and I notice it shows 4 CPU. I know this server only > have 2. None of this 4 CPU shows any status. Idle is "0%". The status > is wrong. > > Then I tried RHEL AS 3, looks more stable, but the "top" also show 4 > CPU. This time it shows the figure. Idle is around 98% to 100%. But > the status run across all the 4 CPU (the physical CPU is only 2...) > > Why seeing 4, not 2? Is there a way to pass kernel parameter during > bootup to force it to use 2 only? Heh, most people would rather see more than less (; Seriously, you're seeing HyperThreading in action. HyperThreading is a technology for some Intel chips that allows for a second set of processing gates on each CPU, giving a virtual CPU. You'll see 2 "CPU" per physical chip with HyperThreading CPUs. -- Jesse Keating RHCE MCSE (geek.j2solutions.net) Fedora Legacy Team (www.fedora.us/wiki/FedoraLegacy) Mondo DevTeam (www.mondorescue.org) GPG Public Key (geek.j2solutions.net/jkeating.j2solutions.pub) Was I helpful? Let others know: http://svcs.affero.net/rm.php?r=jkeating
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