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Subject: Re: [OMPI users] large number of processes
From: hbtcx243_at_[hidden]
Date: 2007-12-04 06:06:34


> Hi:
> I managed to run a 256 process job on a single node. I ran a simple test
> in which all processes send a message to all others.
> This was using Sun's Binary Distribution of Open MPI on Solaris which is
> based on r16572 of the 1.2 branch. The machine had 8 cores.
>
> burl-ct-v40z-0 49 =>/opt/SUNWhpc/HPC7.1/bin/mpirun --mca
> mpool_sm_max_size 2147483647 -np 256 connectivity_c
> Connectivity test on 256 processes PASSED.
> burl-ct-v40z-0 50 =>
> burl-ct-v40z-0 50 =>/opt/SUNWhpc/HPC7.1/bin/mpirun --mca
> mpool_sm_max_size 2147483647 -np 300 connectivity_c -v
> Connectivity test on 300 processes PASSED.
>
> burl-ct-v40z-0 54 =>limit
> cputime unlimited
> filesize unlimited
> datasize unlimited
> stacksize 10240 kbytes
> coredumpsize 0 kbytes
> vmemoryuse unlimited
> descriptors 65536
> burl-ct-v40z-0 55 =>

Thank you for Solaris results.
I compared your environment with the user limit of our cluster.
The limit of open files seemed too small even for executing 256
processes.If we increased the limit,
I was able to execute 256 processes per node.

SUSUKITA, Ryutaro
Peta-scale System Interconnect Project
Fukuoka Industry, Science & Technology Foundation