This seems a very IB centric problem (and solution) going up in the
PML. Moreover, I noticed that independent on the BTL we have some
problems with the multi-rail performance. As an example on a cluster
with 3 GB cards we get the same performance is I enable 2 or 3. Didn't
had time to look into the details, but this might be a more general
On Oct 6, 2009, at 09:51 , Don Kerr wrote:
> I intend to make the change suggested in this ticket to the trunk.
> The change does not impact single rail, tested with openib btl, case
> and does improve dual rail case. Since it does involve performance
> and I am adding a OB1 mca parameter just wanted to check if anyone
> was interested or had an issue with it before I committed the change.
> devel mailing list