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Subject: Re: [OMPI users] problem with alltoall with ppn=8
From: Kozin, I \(Igor\) (i.kozin_at_[hidden])
Date: 2008-08-16 10:00:39


> - per the "sm" thread, you might want to try with just IB (and not
> shared memory), just to see if that helps (I don't expect that it
> will, but every situation is different). Try running "mpirun --mca
> btl openib ..." (vs. "--mca btl ^tcp").

Unfortunately you were right- it did not help. Small message sizes were
slightly worse though. Thanks anyway.