Re: [OMPI devel] RDMA with ob1 and openib

2010-04-27 Thread George Bosilca
On Apr 27, 2010, at 10:20 , Sylvain Jeaugey wrote: > Hi list, > > I'm currently working on IB bandwidth improvements and maybe some of you may > help me understanding some things. I'm trying to align every IB RDMA > operation to 64 bytes, because having it unaligned can hurt your performance >

[OMPI devel] RDMA with ob1 and openib

2010-04-27 Thread Sylvain Jeaugey
Hi list, I'm currently working on IB bandwidth improvements and maybe some of you may help me understanding some things. I'm trying to align every IB RDMA operation to 64 bytes, because having it unaligned can hurt your performance from lightly to very badly, depending on your architecture.