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Results (updated 1 Feb 2022)

These results were collected on a standalone Linux workstation with 32 GB of memory and a 12-core AMD Threadripper 2920X CPU.

NAG

  • NAG Fortran 7.1.7103, MPICH 3.3.2
  • Coarray: 
    nagfor -O3 -coarray -f2018 coarray_collectives.f90 index_map_type.f90 main.f90
export NAGFORTRAN_NUM_IMAGES=12
./a.out <test arguments>
  • MPI: 
    mpifort -O3 index_map_type.f90 main.f90
mpirun -np 12 -bind-to rr ./a.out <test arguments>
  • Times in msec
NAG MPI v1 v2 v3 v4
B0-12 0.0075 0.020 0.417 0.024 0.345
B1-12 0.010 0.022 0.420 0.028 0.333
B2-12 0.019 0.032 0.424 0.037 0.332
B3-12 0.044 0.051 0.459 0.063 0.336
B4-12 0.085 0.129 0.524 0.098 0.385

GNU Fortran / OpenCoarrays

  • GCC 11.2.0, MPICH 3.3.2, OpenCoarrays 2.9.2-13-g235167d
  • Coarray: 
    caf -O3 coarray_collectives.f90 index_map_type.f90 main.f90
cafrun -n 12 ./a.out <test arguments>
  • MPI: 
    mpifort -O3 index_map_type.f90 main.f90
mpirun -np 12 -bind-to rr ./a.out <test arguments>
  • Times in msec
GNU MPI v1 v2 v3 v4
B0-12 0.0078 28 9.2 31 10
B1-12 0.011 58 17 57 18
B2-12 0.020 115 33 115 36
B3-12 0.045 281 76 272 88
B4-12 0.085 489 140 487 160

Intel

  • Intel Fortran and MPI 2021.5.0
  • Coarray: 
    ifort -O3 -coarray coarray_collectives.f90 index_map_type.f90 main.f90
export FOR_COARRAY_NUM_IMAGES=12
export I_MPI_PIN_PROCESSOR_LIST=0-11
export I_MPI_FABRICS=shm
export I_MPI_DEVICE=shm
./a.out <test arguments>
  • MPI: 
    mpifc -O3 index_map_type.f90 main.f90
export I_MPI_PIN_PROCESSOR_LIST=0-11
unset I_MPI_FABRICS I_MPI_DEVICE
mpirun -np 12 ./a.out <test arguments>
  • Times in msec
Intel MPI v1 v2 v3 v4
B0-12 0.071 24 0.127 17 8
B1-12 0.071 79 0.151 32 16
B2-12 0.081 419 0.179 60 29
B3-12 0.102 3100 0.244 139 69
B4-12 0.169 15000 0.372 257 125