Presumably your cluster already has a recommended MPI to use [which is already installed. So you should use that - instead of --download-mpich=1
Satish On Wed, 19 Apr 2017, Pham Pham wrote: > Hi, > > I just installed petsc-3.7.5 into my university cluster. When evaluating > the computer system, PETSc reports "It appears you have 1 node(s)", I donot > understand this, since the system is a multinodes system. Could you please > explain this to me? > > Thank you very much. > > S. > > Output: > ========================================= > Now to evaluate the computer systems you plan use - do: > make PETSC_DIR=/home/svu/mpepvs/petsc/petsc-3.7.5 > PETSC_ARCH=arch-linux-cxx-opt streams > [mpepvs@atlas7-c10 petsc-3.7.5]$ make > PETSC_DIR=/home/svu/mpepvs/petsc/petsc-3.7.5 PETSC_ARCH=arch-linux-cxx-opt > streams > cd src/benchmarks/streams; /usr/bin/gmake --no-print-directory > PETSC_DIR=/home/svu/mpepvs/petsc/petsc-3.7.5 PETSC_ARCH=arch-linux-cxx-opt > streams > /home/svu/mpepvs/petsc/petsc-3.7.5/arch-linux-cxx-opt/bin/mpicxx -o > MPIVersion.o -c -Wall -Wwrite-strings -Wno-strict-aliasing > -Wno-unknown-pragmas -fvisibility=hidden -g -O > -I/home/svu/mpepvs/petsc/petsc-3.7.5/include > -I/home/svu/mpepvs/petsc/petsc-3.7.5/arch-linux-cxx-opt/include > `pwd`/MPIVersion.c > Running streams with > '/home/svu/mpepvs/petsc/petsc-3.7.5/arch-linux-cxx-opt/bin/mpiexec ' using > 'NPMAX=12' > Number of MPI processes 1 Processor names atlas7-c10 > Triad: 9137.5025 Rate (MB/s) > Number of MPI processes 2 Processor names atlas7-c10 atlas7-c10 > Triad: 9707.2815 Rate (MB/s) > Number of MPI processes 3 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 13559.5275 Rate (MB/s) > Number of MPI processes 4 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 > Triad: 14193.0597 Rate (MB/s) > Number of MPI processes 5 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 > Triad: 14492.9234 Rate (MB/s) > Number of MPI processes 6 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15476.5912 Rate (MB/s) > Number of MPI processes 7 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15148.7388 Rate (MB/s) > Number of MPI processes 8 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15799.1290 Rate (MB/s) > Number of MPI processes 9 Processor names atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15671.3104 Rate (MB/s) > Number of MPI processes 10 Processor names atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 > Triad: 15601.4754 Rate (MB/s) > Number of MPI processes 11 Processor names atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15434.5790 Rate (MB/s) > Number of MPI processes 12 Processor names atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > atlas7-c10 atlas7-c10 atlas7-c10 atlas7-c10 > Triad: 15134.1263 Rate (MB/s) > ------------------------------------------------ > np speedup > 1 1.0 > 2 1.06 > 3 1.48 > 4 1.55 > 5 1.59 > 6 1.69 > 7 1.66 > 8 1.73 > 9 1.72 > 10 1.71 > 11 1.69 > 12 1.66 > Estimation of possible speedup of MPI programs based on Streams benchmark. > It appears you have 1 node(s) > Unable to plot speedup to a file > Unable to open matplotlib to plot speedup > [mpepvs@atlas7-c10 petsc-3.7.5]$ > [mpepvs@atlas7-c10 petsc-3.7.5]$ >
