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From: Brock Palen (brockp_at_[hidden])
Date: 2006-11-10 11:55:55


Users,

We have seen a problem with OMPI-1.1.2 and 1.1.1 on gm on OSX G5's.
The application is just HPL. The runs get bad results when running
OMPI over GM but are just fine when ran over TCP (--mca btl ^gm).

The gm version is 2.0.11, We do not see this problem with lam-7.1.2
and the problem still occurs with different nodes/cables and myrinet
switch. Because the problem happens with only OMPI built apps. I
figure this is the best place to start looking for posable causes.

On a side note, OMPI was configured with tm, spawning time is
horribly slow even for just 2 nodes (4 cpus)

========================================================================
====
T/V N NB P Q Time
Gflops
------------------------------------------------------------------------

----
WR00L2L2        8000    80     2     2              28.92           
1.180e+01
------------------------------------------------------------------------ 
----
||Ax-b||_oo / ( eps * ||A||_1  * N        ) =  
85506062224954416.0000000 ...... FAILED
||Ax-b||_oo / ( eps * ||A||_1  * ||x||_1  ) =  
290454392935.0558472 ...... FAILED
||Ax-b||_oo / ( eps * ||A||_oo * ||x||_oo ) =  
2864265481.4369669 ...... FAILED
||Ax-b||_oo  . . . . . . . . . . . . . . . . . =   156110557.630010
||A||_oo . . . . . . . . . . . . . . . . . . . =        2043.004083
||A||_1  . . . . . . . . . . . . . . . . . . . =        2055.583636
||x||_oo . . . . . . . . . . . . . . . . . . . =    30036515.855307
||x||_1  . . . . . . . . . . . . . . . . . . . =  2355097786.221416
Brock Palen
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985