[OMPI devel] trac #2034 : single rail openib btl shows better bandwidth than dual rail (12k< x < 128k)

2009-10-06 Thread Don Kerr
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

Re: [OMPI devel] trac #2034 : single rail openib btl shows better bandwidth than dual rail (12k< x < 128k)

2009-10-06 Thread George Bosilca
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 t

Re: [OMPI devel] trac #2034 : single rail openib btl shows better bandwidth than dual rail (12k< x < 128k)

2009-10-06 Thread Don Kerr
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 s

[OMPI devel] Branch for v1.5

2009-10-06 Thread Jeff Squyres
After a round of internal reviews, Rainer and I will shortly post the full v1.5 series plan on the wiki. The first item up for community feedback is the proposal we made on the weekly engineering call today: branch for v1.5 COB Friday, Oct 9. We'll start making nightly v1.5 tarballs which