You are
> going to get terrible performance - possibly slowing to a crawl having all
> processes open their backing files for mmap on NSF. I think that's the
> error that he's getting.
> >
> >
> > Josh
> >
> > On Thu, Oct 23, 2014 at 6:06 AM, Vinso
possibly slowing to a crawl having all
> processes open their backing files for mmap on NSF. I think that's the
> error that he's getting.
>
>
> Josh
>
> On Thu, Oct 23, 2014 at 6:06 AM, Vinson Leung
> wrote:
>
>> HI, Thanks for your reply:)
>> I r
age, 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 wrote:
>
>
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
wrote:
>
> Because of permission reason (OpenMPI can
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).
