[mpich-discuss] Why is my quad core slower than cluster

[Rajeev Thakur]

Try using the Nemesis device in MPICH2 if you aren't already. Configure with
--with-device=ch3:nemesis.

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of zach
> Sent: Tuesday, July 08, 2008 11:36 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: [mpich-discuss] Why is my quad core slower than cluster
> 
> I am using a cluster.
> Each pc has two cpus and they are Xeon. Each cpu has 4GB, i 
> think red hat is running.
> 
> I also use a pc at home- quad core intel chip, 8gb ram, ubuntu.
> 
> Both are using mpich.
> 
> I have found that my home pc is only running about 1/3 the 
> speed of the cluster, and the number of processes (4) and 
> code is the same.
> 
> Can anyone tell me if this is typical, and why, or am I not 
> optimizing something properly?
> 
> Thanks
> Zach
> 
>