Jeff Squyres wrote:
Brad and I did some scale testing of IBCM and saw this error
sometimes. It seemed to happen with higher frequency when you
increased the number of processes on a single node.
I talked to Sean Hefty about it, but we never figured out a definitive
cause or solution. My best guess is that there is something wonky
about multiple processes simultaneously interacting with the IBCM
kernel driver from userspace; but I don't know jack about kernel
stuff, so that's a total SWAG.
Thanks for reminding me of this issue; I admit that I had forgotten
about it. :-( Pasha -- should IBCM not be the default?
It is not default. I guess Lenny configured it explicitly, is not it ?
Pasha.
On Jul 13, 2008, at 7:08 AM, Lenny Verkhovsky wrote:
Hi,
I am getting this error sometimes.
/home/USERS/lenny/OMPI_COMP_PATH/bin/mpirun -np 100 -hostfile
/home/USERS/lenny/TESTS/COMPILERS/hostfile
/home/USERS/lenny/TESTS/COMPILERS/hello
[witch24][[32428,1],96][../../../../../ompi/mca/btl/openib/connect/btl_openib_connect_ibcm.c:769:ibcm_component_query]
failed to ib_cm_listen 10 times: rc=-1, errno=22
Hello world! I'm 0 of 100 on witch2
Best Regards
Lenny.
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