Jeff Squyres wrote:
Please note that I replied to your original post:
http://www.open-mpi.org/community/lists/users/2006/02/0712.php
Was that not sufficient? If not, please provide more details on what
you are attempting to do and what is occurring. Thanks.
I have a simple program in which the rank 0 task dispatches compute
tasks to other processes. It works fine on one 4-way SMP machine, but
when I try to run it on two nodes, the processes on the other machine
seem to spin in a loop inside MPI_SEND (a message is not delivered).
Cezary Sliwa
On Mar 7, 2006, at 2:36 PM, Cezary Sliwa wrote:
Hello again,
The problem is that MPI_SEND blocks forever (the message is still
not delivered after many hours).
Cezary Sliwa
From: Cezary Sliwa <sl...@blue.cft.edu.pl>
Date: February 22, 2006 10:07:04 AM EST
To: us...@open-mpi.org
Subject: MPI_SEND blocks when crossing node boundary
My program runs fine with openmpi-1.0.1 when run from the command
line (5 processes with empty host file), but when I schedule it
with qsub to run on 2 nodes it blocks on MPI_SEND
(gdb) info stack
#0 0x00000034db30c441 in __libc_sigaction () from /lib64/tls/
libpthread.so.0
#1 0x0000000000573002 in opal_evsignal_recalc ()
#2 0x0000000000582a3c in poll_dispatch ()
#3 0x00000000005729f2 in opal_event_loop ()
#4 0x0000000000577e68 in opal_progress ()
#5 0x00000000004eed4a in mca_pml_ob1_send ()
#6 0x000000000049abdd in PMPI_Send ()
#7 0x0000000000499dc0 in pmpi_send__ ()
#8 0x000000000042d5d8 in MAIN__ () at main.f:90
#9 0x00000000005877de in main (argc=Variable "argc" is not available.
)
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