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?
On Jul 13, 2008, at 7:08 AM, Lenny Verkhovsky wrote:
> 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/
> 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
> devel mailing list