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Hi,<br><br>
I'm running a simulation on a Linux Box (ubuntu 8 with kernel
2.6.24-21-generic).<br>
It is a fortran program compiled with Intel 10.1 and mpich2-1.0.7.<br>
The CPU is an AMD 64 X2 Dual Core 5600+<br><br>
The simulation works correctly with a small data set, and I can use 1, 2,
4 ... processes (mpiexec -n #) to emulate a cluster, but when the data
set is increased, the simulation runs only if I use more than 4 or 6
processes (the number depends on the dimension of the data set; a bigger
data set requires an increased number of processes).<br>
<br>
It stops in a send-receive communication between all the PEs and PE0, and
stops also if I use mpi_gatherv.<br>
But, very strange, if I stop mpd (which starts at boot time) and restart
it manually, the simulation works without any error with the same data
set !<br>
If I run the simulation in a linux cluster, I have the same behavior
except that, also restarting mpd, the simulation doesn't work if I don't
use enough processes.<br><br>
Any idea?<br><br>
Regards.<br><br>
gaetano<br>
<x-sigsep><p></x-sigsep>
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<tt>Gaetano Bellanca - Department of Engineering - University of
Ferrara <br>
Via Saragat, 1 - 44100 - Ferrara -
ITALY
<br>
Voice (VoIP): +39 0532 974809 Fax:
+39 0532 974870<br>
<a href="mailto:gaetano.bellanca@unife.it" eudora="autourl">
mailto:gaetano.bellanca@unife.it</a> <br>
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