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Subject: Re: [OMPI users] How to check processes working in parallel on one node of MPI cluster
From: Ralph Castain (rhc_at_[hidden])
Date: 2012-06-23 15:39:22


No sure I can fully answer that question, but you could add --display-map to the mpirun command and it will tell you how many we *think* we started on each node.

On Jun 23, 2012, at 1:33 PM, Jack Bryan wrote:

> Hi,
>
> I am running an OpenMPI program on a linux cluster with 4 quad cores per node.
>
> I use qstat -n jobID to check how many processes working in parallel and find that :
>
> node160/15+node160/14+node160/13+node160/12+node160/11+node160/10+node160/9
> +node160/8+node160/7+node160/6+node160/5+node160/4+node160/3+node160/2
> +node160/1+node160/0+node166/15+node166/14+node166/13+node166/12+node166/11
> +node166/10+node166/9+node166/8+node166/7+node166/6+node166/5+node166/4
> +node166/3+node166/2+node166/1+node166/0+node173/15+node173/14+node173/13
> +node173/12+node173/11+node173/10+node173/9+node173/8+node173/7+node173/6
> +node173/5+node173/4+node173/3+node173/2+node173/1+node173/0+node175/15
> +node175/14+node175/13+node175/12+node175/11+node175/10+node175/9+node175/8
> +node175/7+node175/6+node175/5+node175/4+node175/3+node175/2+node175/1
> +node175/0
>
> But, when I use ssh to be on a node , e..g ssh node175,
>
> I use top command to check how many processes working on node 175 and find that
> there are only one process working, not 8 processes.
>
> Would you please tell me how to check the processes number on one node ?
>
> Any help will be appreciated.
>
> Thanks
>
> Jinxu Ding
>
>
>
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