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Subject: Re: [OMPI users] very low performance over infiniband
From: Shamis, Pavel (shamisp_at_[hidden])
Date: 2013-01-28 13:43:51

Also make sure that processes were not swapped out to a hard drive.

Pavel (Pasha) Shamis

Computer Science Research Group
Computer Science and Math Division
Oak Ridge National Laboratory
On Jan 27, 2013, at 6:39 AM, John Hearns <hearnsj_at_[hidden]<mailto:hearnsj_at_[hidden]>> wrote:
2 percent?
Have you logged into a compute node and run a simple top when the job is running?
Are all the processes distributed across the CPU cores?
Are the processes being pinned properly to a core? Or are they hopping from core to core?
Also make SURE all nodes havenooted with all cores online and all report the same amount of RAM
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