SLUG Mailing List Archives
Re: [SLUG] Top and hyperthreading.
- To: Jeff Ai <jeffaiau@xxxxxxxxxxxx>
- Subject: Re: [SLUG] Top and hyperthreading.
- From: DaZZa <dazza@xxxxxxxxxx>
- Date: Thu, 26 Aug 2004 08:12:47 +1000 (EST)
- Cc: slug@xxxxxxxxxxx
On Wed, 25 Aug 2004, Jeff Ai wrote:
> Hi guys,
> Recently i upgraded from FC1 to FC2. My machine's got a P4 2.8 HT,
> kernel is 2.6.8-1.521smp , lilo.conf has acpismp=force.
> i found something quite strange.
> 1. cat /proc/cupinfo shows there are 2 CPUs, which is what i expected.
> 2. top shows only CPU. I remember with FC1 2.4.*smp kernel, i could see
> 2 CPUs in "top".
> 3. I am not noticing a dramatic change in performance, so i am not sure
> if HT is actually working on my machine.
> is there anything missing?
Try pressing "1" or "I" when running top.
By default, top displays a total of CPU useage/time. Pressing "1" changes
the display to show individual CPU's.
Of course, this assumes your kernel is actually using both CPU's - have
you compiled/booted with an SMP enabled kernel?