Re: [OMPI users] Intra-node communication

2012-06-01 Thread Jeff Squyres
> Cc: Mudassar Majeed > Sent: Friday, June 1, 2012 4:52 PM > Subject: Re: [OMPI users] Intra-node communication > > ...and exactly how you measured. You might want to run a well-known > benchmark, like NetPIPE or the OSU pt2pt benchmarks. > > Note that the *fir

Re: [OMPI users] Intra-node communication

2012-06-01 Thread Mudassar Majeed
, Mudassar From: Jeff Squyres To: Open MPI Users Cc: Mudassar Majeed Sent: Friday, June 1, 2012 4:52 PM Subject: Re: [OMPI users] Intra-node communication ...and exactly how you measured.  You might want to run a well-known benchmark, like NetPIPE or the

Re: [OMPI users] Intra-node communication

2012-06-01 Thread Jeff Squyres
On Jun 1, 2012, at 11:05 AM, Mudassar Majeed wrote: > Running with enabled shared memory gave me the following error. > > mpprun INFO: Starting openmpi run on 2 nodes (16 ranks)... > -- > A requested component was not found,

Re: [OMPI users] Intra-node communication

2012-06-01 Thread Jeff Squyres
...and exactly how you measured. You might want to run a well-known benchmark, like NetPIPE or the OSU pt2pt benchmarks. Note that the *first* send between any given peer pair is likely to be slow because OMPI does a lazy connection scheme (i.e., the connection is made behind the scenes). Sub

Re: [OMPI users] Intra-node communication

2012-06-01 Thread Jingcha Joba
This should not happen. Typically, Intra node communication latency are way way cheaper than inter node. Can you please tell us how u ran your application ? Thanks -- Sent from my iPhone On Jun 1, 2012, at 7:34 AM, Mudassar Majeed wrote: > Dear MPI people, >Ca