topic Re: Pb hyperthreading in ProLiant Servers (ML,DL,SL)

Pb hyperthreading

Anthony Pasquier — Mon, 30 Aug 2004 09:33:59 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, 0% idle
CPU3 states: 18,3% user, 4,2% system, 0,0% nice, 76,4% 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

Anthony Pasquier — Mon, 30 Aug 2004 09:51:33 GMT

top above is no correct !!

CPU0 states: 19,0% user, 7,4% system, 0,0% nice, 72,5% idle
CPU1 states: 14,3% user, 4,5% system, 0,0% nice, 0% idle
CPU2 states: 17,2% user, 8,0% system, 0,0% nice, 74,2% idle
CPU3 states: 15,0% user, 3,4% system, 0,0% nice, 0% idle

Re: Pb hyperthreading

JohnWRuffo — Mon, 30 Aug 2004 13:28:58 GMT

Hyper-Threading may be involved here and goofing up your affinity, but do a man on "taskset" and see if you can move your apps around.

G'luck! -john