[petsc-users] Streams scaling.log
Smith, Barry F.
bsmith at mcs.anl.gov
Wed Apr 25 13:49:22 CDT 2018
It should not have
Number of MPI processes 1
it should have an increasing number of MPI processes. Do you have multiple MPI's installed on your machine and have the "wrong" mpiexec in your path for the MPI you built PETSc with?
What command line options did you use for ./configure ?
Barry
> On Apr 25, 2018, at 1:26 PM, Manuel Valera <mvalera-w at sdsu.edu> wrote:
>
> Hi,
>
> I'm running scaling tests on my system to check why my scaling is so poor, and after following the MPIVersion guidelines my scaling.log output looks like this:
>
> Number of MPI processes 1 Processor names node37
> Triad: 12856.9252 Rate (MB/s)
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Triad: 9138.3320 Rate (MB/s)
> Triad: 9945.0006 Rate (MB/s)
> Triad: 10480.8471 Rate (MB/s)
> Triad: 12055.4846 Rate (MB/s)
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Triad: 7394.1014 Rate (MB/s)
> Triad: 5528.9757 Rate (MB/s)
> Triad: 6052.7506 Rate (MB/s)
> Triad: 6188.5710 Rate (MB/s)
> Triad: 6944.4515 Rate (MB/s)
> Triad: 7407.1594 Rate (MB/s)
> Triad: 9508.1984 Rate (MB/s)
> Triad: 10699.7551 Rate (MB/s)
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Number of MPI processes 1 Processor names node37
> Triad: 6682.3749 Rate (MB/s)
> Triad: 6825.3243 Rate (MB/s)
> Triad: 7217.8178 Rate (MB/s)
> Triad: 7525.1025 Rate (MB/s)
> Triad: 7882.1781 Rate (MB/s)
> Triad: 8071.1430 Rate (MB/s)
> Triad: 10341.9424 Rate (MB/s)
> Triad: 10418.4740 Rate (MB/s)
>
>
> Is this normal? i feel is different from what i get from an usual streams test, how can i get it to work properly?
>
> Thanks,
>
>
>
>
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