Messages in this thread | | | Subject | Re: bug 2 cpus shows as 4 cpus | From | Robert Love <> | Date | 08 Oct 2002 19:57:08 -0400 |
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On Tue, 2002-10-08 at 19:39, Jeff Chua wrote:
> I'm running 2.4.20-pre9 on DELL server with Xeon dual processors, but > /proc/cpuinfo shows not 2, but "4" cpus! > > The bogomips semms to indicate 2 cpus. (3971.48 is about 2GHz x 2). > > Is this problem related to Xeon? I've other SMP boxes with P3, but they > reports correctly 2 cpus.
Hahaha, dude, you have hyper-threading! Each of your Xeons has two logical processors that share most processor resources but implement two independent pipelines. So you have four schedulable processors in total.
Google around for hyper-threading, HT, and SMT. It is in all P4-class Xeons and soon all regular P4s.
Robert Love
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