Hello,
I have installed lam/mpi version 7.0.6 on our IBM SP4+ system with HPS
(High Performance Switch) which is rated at 2GB/sec.
With the native MPI implementation, we achieve transfers rated
at about 1.7GB/sec. With lam/mpi, I reach only 550MB/s.
On our "old" SP4 system, with PCI switch - rated at 375MB/sec -
lam/mpi version 7.0.3. reached more than 350MB/s which was comparable
to the native MPI implementation on that system.
Is there any way to tune lam/mpi for SP4+ systems with HPS?
Thanks for any hints.
Regards,
Dominique
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