On Fri, 12 Nov 2004 17:14:28 -0000, linux <[EMAIL PROTECTED]> wrote: > A quick question about hardware. I'm 99% sure my box has 2 Xeon processors in > it. I had installed the sarge kernel then got the > kernel-image-2.4.27-1-686-smp_2.4.27-1.backports.org.1_i386.deb > package and installed smoothly using `dpkg -i <kernel-image... .deb>`, > rebooted > into that kernel. I now seem to be seeing 4 (four!) processors eg as reported > by > `top`, `cat /proc/cpulist` and in the /var/log/messages file. (Aside: with the > uni-processor kernel, `top` only reported 1Gb memory but the smp kernel, > correctly, reports the 2Gb memory > > I've just rebooted to WinXP and the SystemProperties implies there's 2 > processors on the 'General' tab, but lists 4 on the > Hardware->DeviceManager->Processors tab and indeed the TaskManager also > implies > there's 4 CPUs. > > Any ideas what's going on?
It's because of hyperthreading. Each processor appears like two to the OS. You can most likely change it in your BIOS if you think your OS performs better with two CPU's instead of four (there are cases this might be true). -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
