[GE users] Comparison of MPI Job Runtimes with and without SGE

Rayson Ho raysonho at eseenet.com
Wed Aug 11 23:30:43 BST 2004


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How big is the difference??

May be the process priority of the MPI tasks is higher than normal
processes...

Rayson



>Hello all!
>
>    I was running an MPI job on my solaris cluster. I found out that the 
>job actually takes less amount of time to execute with MPICH tightly 
>integrated with SGE than when it runs through plain MPICH only. Note 
>that there is no other user load on the cluster. and this MPI job is 
>only user job running on the cluster. and most impoprtantly i am feeding 
>  eaxctly the same set of machines to the job (when it running through 
>plain MPICH) as SGE_tight integration makes the job run on.
>I would assume, given that both times job is run on the same set of 
>nodes, SGE should incur more cost as comapred to MPICH?. Any idea ?
>
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