PPT Slide
Table 1. Comparison of computer processing capability of VPP Fortran
and HPF/JA in a 3-dimensional global MHD code for the solar wind-magnetosphere
interaction using a Fujitsu VPP5000/56. 56 PEs=2**3*7 PEs
Number Number of VPP Fortran HPF/JA
of PE grids cpu time Gflops Gf/PE cpu time Gflops Gf/PE
1PE 200x100x478 119.607 ( 0.17) 0.17 (scalar)
1PE 200x100x478 2.967 ( 6.88) 6.88 3.002 ( 6.80) 6.80 100%
2PE 200x100x478 1.458 ( 14.01) 7.00 1.535 ( 13.30) 6.65 98
4PE 200x100x478 0.721 ( 28.32) 7.08 0.761 ( 26.85) 6.71 99
8PE 200x100x478 0.365 ( 55.89) 6.99 0.386 ( 52.92) 6.62 97
16PE 200x100x478 0.205 ( 99.38) 6.21 0.219 ( 93.39) 5.84 86
32PE 200x100x478 0.107 (191.23) 5.98 0.110 (186.13) 5.82 86
48PE 200x100x478 0.069 (297.96) 6.21 0.074 (276.96) 5.77 85
56PE 200x100x478 0.064 (319.53) 5.71 0.068 (299.27) 5.34 79
1PE 500x100x200 2.691 ( 7.94) 7.94 2.691 ( 7.94) 7.94 100%
2PE 500x100x200 1.381 ( 15.47) 7.73 1.390 ( 15.37) 7.68 97
4PE 500x100x200 0.715 ( 29.97) 7.47 0.712 ( 29.99) 7.50 94
8PE 500x100x200 0.398 ( 53.65) 6.71 0.393 ( 54.38) 6.80 85
16PE 500x100x200 0.210 (101.87) 6.37 0.202 (105.74) 6.61 83
32PE 500x100x200 0.131 (163.55) 5.11 0.120 (175.50) 5.48 69
48PE 500x100x200 0.100 (214.48) 4.46 0.091 (231.69) 4.82 61
56PE 500x100x200 0.089 (239.48) 4.28 0.086 (244.85) 4.37 55