[mpich-discuss] quad core mpich2 sluggish

[Reuti]

Hi,

Am 24.12.2010 um 19:33 schrieb zach:

> I am running the latest ubuntu with a Q6600 quad core cpu and the mpich2 that came with ubuntu
> I can run my parallelized code over the four cores (i see it in 'top')
> however, the speed increase over a single process is hardly improved for 2,3, or even 4 processes.
> 
> i was able to run the same code on a linux cluster through my school with speed increases as expected.
> am i doing something wrong? 

do you start it in the same way on both machines - what command do you use?

-- Reuti