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From: Ken Mighell (mighell_at_[hidden])
Date: 2005-11-02 13:35:39


Dear George, Andrew, and Jeff,

I retrieved openmpi-1.1a1r7966.tar.gz and was able to build it
without any problems on my 5-node Beowulf cluster running gcc 2.96.
Thanks for implementing the patches.

I compiled my qlwfpc2 code and it appears that the case with 3
machines has improved slightly over 1.0rc4
(times are given in seconds of walltime):

(1) (2) (3) (4)
1 6.8 6.8 7.3
2 4.5 4.5 4.7
3 8.5 8.8 4.9
4 3.4 3.5 3.6
5 3.1 3.1 3.3

(1) number of machines
(2) OpenMPI_1.1a1r7966
(3) OpenMPI_1.0rc4
(4) MPICH_1.2.5

My cluster uses TCP over a Gigabit Ethernet switch.

-Ken