HI, Thanks for your reply:) I really run an MPI program (compile with OpenMPI and run with "mpirun -n 8 ......"). My OpenMPI version is 1.8.3 and my program is Gromacs. BTW, what is OSHMEM ?
Best Vincent On Thu, Oct 23, 2014 at 12:21 PM, Ralph Castain <r...@open-mpi.org> wrote: > From your error message, I gather you are not running an MPI program, but > rather an OSHMEM one? Otherwise, I find the message strange as it only > would be emitted from an OSHMEM program. > > What version of OMPI are you trying to use? > > On Oct 22, 2014, at 7:12 PM, Vinson Leung <lwhvinson1...@gmail.com> wrote: > > Thanks for your reply:) > Follow your advice I tried to set the TMPDIR to /var/tmp and /dev/shm and > even reset to /tmp (I get the system permission), the problem still occur > (CPU utilization still lower than 20%). I have no idea why and ready to > give up OpenMPI instead of using other MPI library. > > --------Old Message------------- > > Date: Tue, 21 Oct 2014 22:21:31 -0400 > From: Brock Palen <bro...@umich.edu> > To: Open MPI Users <us...@open-mpi.org> > Subject: Re: [OMPI users] low CPU utilization with OpenMPI > Message-ID: <cc54135d-0cfe-440a-8df2-06b587e17...@umich.edu> > Content-Type: text/plain; charset=us-ascii > > Doing special files on NFS can be weird, try the other /tmp/ locations: > > /var/tmp/ > /dev/shm (ram disk careful!) > > Brock Palen > www.umich.edu/~brockp > CAEN Advanced Computing > XSEDE Campus Champion > bro...@umich.edu > (734)936-1985 > > > > > On Oct 21, 2014, at 10:18 PM, Vinson Leung <lwhvinson1...@gmail.com> > wrote: > > > > Because of permission reason (OpenMPI can not write temporary file to > the default /tmp directory), I change the TMPDIR to my local directory > (export TMPDIR=/home/user/tmp ) and then the MPI program can run. But the > CPU utilization is very low under 20% (8 MPI rank running in Intel Xeon > 8-core CPU). > > > > And I also got some message when I run with OpenMPI: > > [cn3:28072] 9 more processes have sent help message > help-opal-shmem-mmap.txt / mmap on nfs > > [cn3:28072] Set MCA parameter "orte_base_help_aggregate" to 0 to see all > help / error messages > > > > Any idea? > > Thanks > > > > VIncent > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/10/25548.php > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/10/25555.php > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2014/10/25556.php >
