Re: [OMPI users] Openmpi performance issue

2011-12-27 Thread Ralph Castain
en.sh > ./configure --prefix=/mpi/openmpi-1.5.4 --with-openib CC=icc CXX=icpc > F77=ifort FC=ifort --with-knem=/opt/knem > > > > From: Eugene Loh > To: Open MPI Users > Cc: Eric Feng > Sent: Wednesday, December 28, 2011 1:58 AM > Subject: Re: [OMPI users] Openmpi per

Re: [OMPI users] Openmpi performance issue

2011-12-27 Thread Eric Feng
pi/openmpi-1.5.4 --with-openib CC=icc CXX=icpc F77=ifort FC=ifort --with-knem=/opt/knem From: Eugene Loh To: Open MPI Users Cc: Eric Feng Sent: Wednesday, December 28, 2011 1:58 AM Subject: Re: [OMPI users] Openmpi performance issue If I remember corre

Re: [OMPI users] Openmpi performance issue

2011-12-27 Thread Eugene Loh
ng <mailto:hpc_benchm...@yahoo.com>> *To:* "us...@open-mpi.org <mailto:us...@open-mpi.org>" mailto:us...@open-mpi.org>> *Sent:* Friday, December 23, 2011 9:12 PM *Subject:* [OMPI users] Openmpi performance issue Hello, I am running into performance issue wit

Re: [OMPI users] Openmpi performance issue

2011-12-27 Thread Ralph Castain
pplication but similar in IMB benchmark. > > From: Eric Feng > To: "us...@open-mpi.org" > Sent: Friday, December 23, 2011 9:12 PM > Subject: [OMPI users] Openmpi performance issue > > Hello, > > I am running into performance issue with Open MPI, I wish expert

Re: [OMPI users] Openmpi performance issue

2011-12-27 Thread Eric Feng
11 9:12 PM Subject: [OMPI users] Openmpi performance issue Hello,  I am running into performance issue with Open MPI, I wish experts here can provide me some help, I have one application calls a lot of sendrecv, and isend/irecv, so waitall. When I run Intel MPI, it is around 30% faster than OpenMP

[OMPI users] Openmpi performance issue

2011-12-23 Thread Eric Feng
Hello,  I am running into performance issue with Open MPI, I wish experts here can provide me some help, I have one application calls a lot of sendrecv, and isend/irecv, so waitall. When I run Intel MPI, it is around 30% faster than OpenMPI. However if i test sendrecv using IMB, OpenMPI is even