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Peformance test - Van Leer flux vector splitting

  • MUSCL 2nd order
  • 1st order dimensional splitting

Cartesian

  • 178 time steps (The Van Leer FVS has a CFL condition below 1. This is considered in the time steering by an appropriate reduction factor.)
  • 535 ghost cell synchronizations, GhostCells=2
  • TimeControl: StepMode=1
Task P=16 P=32 P=64
s % s % s %
Integration 843 76.3 444 84.3 214 61.5
Int. - parallel diff. 94 8.5 67 11.0 70 20.2
Boundary setting 172 15.0 93 15.3 64 18.4
Output 44 3.9 39 6.4 42 12.1
Misc. 45 4.1 31 5.1 27 7.8
Total / Grind time 1104 3.7e-7 608 2.0e-7 347 1.2e-7

Ghost-fluid method

  • 183 time steps
  • 1287 ghost cell synchronizations
  • GhostCells=3, BoundaryWidth=1
  • TimeControl: StepMode=1
Task P=16 P=32 P=64
s % s % s %
Integration 993 36.1 491 33.4 241 30.6
Int. - parallel diff. 130 4.7 75 5.1 66 8.4
Boundary setting 637 23.2 380 25.9 218 27.7
GFM Find cells 316 11.5 158 10.8 79 10.0
GFM Interpolation 552 20.1 277 18.8 138 17.6
GFM Overhead 74 2.7 37 2.5 19 2.4
GFM Calculate 59 2.1 29 2.0 14 1.8
GFM - parallel diff. 227 8.3 135 9.2 73 9.3
Output 47 1.7 48 3.2 48 6.1
Misc. 66 2.4 48 3.2 28 3.6
Total / Grind time 2748 9.0e-7 1470 4.8e-7 787 2.6e-7

  • GhostCells=6, BoundaryWidth=2
  • TimeControl: StepMode=1
Task P=16 P=32 P=64
s % s % s %
Integration 1464 27.9 736 25.6 382 24.5
Int. - parallel diff. 122 2.3 112 3.9 205 13.2
Boundary setting 1488 28.4 968 33.7 507 32.6
GFM Find cells 592 11.3 302 10.5 156 10.0
GFM Interpolation 1099 21.0 555 19.3 286 18.4
GFM Overhead 140 2.7 71 2.5 37 2.4
GFM Calculate 131 2.1 64 2.2 33 2.1
GFM - parallel diff. 623 11.9 373 13.0 195 12.5
Output 95 1.7 88 3.1 76 4.9
Misc. 142 2.4 89 3.1 55 3.6
Total / Grind time 5240 1.7e-6 2879 9.4e-7 1556 5.1e-7

-- RalfDeiterding - 17 Dec 2007

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