I agree there is probably a larger issue here and yes this is somewhat
specific but where as OB1 appears to have multiple protocols depending
on the capabilities of the BTLs I would not characterize as an IB
centric problem. Maybe OB1 RDMA problem. There is a clear benefit from
modifying this specific case. Do you think its not worth making
incremental improvements while also attacking a potential bigger issue?
-DON
On 10/06/09 10:52, George Bosilca wrote:
Don,
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
problem.
george.
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.
-DON
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