Re: [OMPI devel] Very poor performance with btl sm on twin nehalem servers with Mellanox ConnectX installed

2010-05-14 Thread Oskar Enoksson
Christopher Samuel wrote: > Subject: Re: [OMPI devel] Very poor performance with btl sm on twin > nehalem servers with Mellanox ConnectX installed > To: de...@open-mpi.org > Message-ID: > > Content-Type: text/plain; charset="iso-8859-1" > > On 13

[OMPI devel] Very poor performance with btl sm on twin nehalem servers with Mellanox ConnectX installed

2010-05-13 Thread Oskar Enoksson
Sorry for crossposting, I already posted this report to the users list, but the developers list is probably more relevant. I have a cluster with two Intel Xeon Nehalem E5520 CPU per server quad-core, 2.27GHz). The interconnect is 4xQDR Infiniband (Mellanox ConnectX). I have compiled and installed