Pete,
I don't know why the behavior on an 8 processor machine differs with
the machine file format/syntax. You don't need to specify a machine
file on a single multiprocessor machine.
On you torque scheduled cluster you shouldn't need a machine file for
openmpi. Openmpi should just use the number of processors you
requested from torque. It will communicate with torque to find out
which ones to use.
Doug Reeder
On Aug 3, 2008, at 10:45 AM, Pete Schmitt wrote:
I use the following: mpirun -machinefile machine.file -np 8 ./mpi-
program
and the machine file has the following:
t01
t01
t01
t01
t01
t01
t01
t01
I get the following error:
rm_12992: (0.632812) net_send: could not write to fd=4, errno = 32
rm_13053: (0.421875) net_send: could not write to fd=4, errno = 32
rm_l_3_13050: (0.636719) net_send: could not write to fd=5, errno = 32
rm_13114: (0.210938) net_send: could not write to fd=4, errno = 32
rm_12870: (1.066406) net_send: could not write to fd=4, errno = 32
rm_12931: (0.855469) net_send: could not write to fd=4, errno = 32
rm_l_4_13111: (0.425781) net_send: could not write to fd=5, errno = 32
rm_l_1_12929: (1.070312) net_send: could not write to fd=5, errno = 32
rm_l_2_12989: (0.859375) net_send: could not write to fd=5, errno = 32
rm_l_5_13172: (0.214844) net_send: could not write to fd=5, errno = 32
p0_12866: (5.285156) net_send: could not write to fd=4, errno = 32
If I use np=6 or less, it works fine. It also works with 8 if the
machine.file just contains t01:8
Since we want to submit this to a torque/moab cluster, it's not
possible
to get the latter format.
The OS is a 64b RH5.2
--
Pete Schmitt
Technical Director:
Discovery Cluster / Computational Genetics Lab
URL: http://discovery.dartmouth.edu
179M Berry Baker Library, HB 6224
Dartmouth College
Hanover, NH 03755
Dart: 603-646-8109
DHMC: 603-653-3598
Fax: 603-646-1042
Cell: 603-252-2452
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