[petsc-users] Streams scaling.log

[Smith, Barry F.]

   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,
> 
> 
> 
>