topic Pb hyperthreading in Operating System - Linux

Pb hyperthreading

Anthony Pasquier — Mon, 30 Aug 2004 09:57:03 GMT

We have a Proliant server DL 360 with linux red hat (kernel 2.4.20) and I don't understand
why the second and the fourth 'virtual processor' are 0% of idle.Here is the result of the 'top' commande :

CPU0 states: 19,1% user, 11,3% system, 0,0%nice, 69,0% idle
CPU1 states: 18,1% user, 3,3% system, 0,0% nice, 0% idle
CPU2 states: 16,1% user, 9,2% system, 0,0% nice, 69% idle
CPU3 states: 18,3% user, 4,2% system, 0,0% nice, 0% idle

but the server seem to work well!! and after a reboot the four processors are some idle.

what is the problem ?

thanks..

Re: Pb hyperthreading

Stuart Browne — Mon, 30 Aug 2004 17:42:03 GMT

2.4.20? Is that a RH9 install?

What kernel package is currently on the system (rpm -q kernel) ?

Re: Pb hyperthreading

Anthony Pasquier — Tue, 31 Aug 2004 04:10:59 GMT

we have a RH7.3 with a 2.4.20 kernel release,required for hyperthreading.
Here is the result of the 'uname -a' command :

Linux bart 2.4.20 #14 SMP lun jui 7 14:36:22 CEST 2003 i686 unknown

Re: Pb hyperthreading

Stuart Browne — Tue, 31 Aug 2004 17:40:11 GMT

Ahh, so it's a custom compiled kernel. Ok.

I don't suppose you could attach your '.config' so we could have a look at the compile options from the kernel build?

Re: Pb hyperthreading

Anthony Pasquier — Wed, 01 Sep 2004 03:30:43 GMT

here is the '.config' file

thanks.