[gmx-users] mdrun_mpi on SGI

David van der Spoel spoel at xray.bmc.uu.se
Thu May 2 19:45:41 CEST 2002

On Thu, 2 May 2002, Xiaomin luo wrote:

>Dear GMX users,
>I had a problem while using mpi version of mdrun on SGI Origin 3200 with
>4 CPU, mdrun_mpi was invoked by such command
>mpirun -np 2 mdrun_mpi ... -nice 0
>But most time, the two processes were sleeping, and it's even slower
>than running in sequential with 1 CPU.
>Can someone help me? Thanks.
I assume that's SGI MPI? Is the machine loaded with jobs? In that case it
may just be that the jobs are waiting for each other all the time.
Try to run it on an empty machine.

Groeten, David.
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://zorn.bmc.uu.se/~spoel

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