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From: Andrew Friedley (afriedle_at_[hidden])
Date: 2007-05-09 09:13:19

You say that fixes the problem, does it work even when running more than
one MPI process per node? (that is the case the hack fixes) Simply
doing an mpirun with a -np paremeter higher than the number of nodes you
have set up should trigger this case, and making sure to use '-mca btl
udapl,self' (ie not SM or anything else).


Boris Bierbaum wrote:
> It has been explained in a different thread on [ofa-general] that the
> problem lies in a combination of the OpenIB-cma provider not setting the
> local and remote port numbers on endpoints correctly and Open MPI
> stepping over the IA to save the port number to circumvent this problem,
> thereby confusing the provider.
> I commented out line 197 in ompi/mca/btl/udapl/btl_udapl.c (Open MPI
> 1.2.1 release) and this fixes the problem. As the problem in the
> provider is currently being fixed, the whole saving of the port number
> in the uDAPL BTL code will be unnecessary in the future.
> Steve Wise wrote:
>>>> Can the UDAPL OFED wizards shed any light on the error messages that
>>>> are listed below? In particular, these seem to be worrysome:
>>>>> setup_listener Permission denied
>>>> setup_listener Address already in use
>>> These failures are from rdma_cm_bind indicating the port is already
>>> bound to this IA address. How are you creating the service point?
>>> dat_psp_create or dat_psp_create_any? If it is psp_create_any then you
>>> will see some failures until it gets to a free port. That is normal.
>>> Just make sure your create call returns DAT_SUCCESS.
>> Arlin, why doesn't dapl_psp_create_any() just pass a port of zero down
>> and let the rdma-cma pick an available port number?
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