Timings for atmosphere only

Alistair says that basic GA6 with CLASSIC manages 1.08 yr/day on 256 PEs (e-mail on 13:26 14 October 2014).

N216

These runs are different configurations of gadga, which is N216L85 the GA6 standard AMIP job (copy of antif with Dr Hook added in).

NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
8 * 32 (256) 1 month7,235 0.995
16 * 32 (512) 1 month4,129 1.74
32 * 32 (1,024) 1 month Floating-point exception at about timestep 311 (see gadga000.gadga.d14308.t111543.leave)
32 * 32 (1,024) 1 month Floating-point exception at about timestep 362 (probably in UC_TO_UB, see gadga000.gadga.d14308.t172659.leave)

For now, I've given up on Dr Hook. Configuration gadgb is the same as gadga but without Dr Hook.

NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
8 * 32 (256) 10 days2,281 1.05
16 * 32 (512) 10 days1,293 1.86
32 * 32 (1,024) 10 days923 2.60
64 * 32 (2,048) 10 days789 3.04
64 * 36 (2,304) 10 days755 3.18
64 * 64 (4,096) 10 days861 2.79

N96 with Dr Hook

CLASSIC with Dr Hook, faced.

NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
16 * 8 (128) 1 month2,584 2.79
16 * 16 (256) 1 month1,721 4.18
32 * 16 (512) 1 month1,319 5.46
32 * 28 (896) 1 month1,248 5.77
48 * 28 (1,344) 1 month1,192 6.04

N96 without Dr Hook

CLASSIC, faceu.

NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
8 * 16 (128) 1 month2,229 3.23
16 * 16 (256) 1 month1,356 5.31
32 * 16 (512) 1 month982 & 931 7.33 & 7.73
32 * 28 (896) 1 month913 7.89
48 * 28 (1,344) 1 month798 9.02

N96 with Dr Hook and with 30 minute time step

For this I've coped faced to faces, and changed the timestep

  • ->Model Selection
    • ->Atmosphere
      • ->Scientific Parameters and Sections
        • Time-Stepping
          • Number of timesteps per `period': CHANGED FROM 72 TO 48
NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
8 * 16 (128) 1 month1,978 3.64
16 * 16 (256) 1 month1,246 5.78
32 * 16 (512) 1 month931 7.73
32 * 28 (896) 1 month867 8.30
48 * 28 (1,344) 1 month848 8.49

N96 without Dr Hook and with 30 minute time step

I've changed faces, so that it no longer has Dr Hook.

NMPPE*NMPPN (total) Model run lengthTotal time (s) Speed (model years per day)
8 * 16 (128) 1 month1,740 4.14
16 * 16 (256) 1 month1,076 6.69
32 * 16 (512) 1 month766 9.40
32 * 28 (896) 1 month668 10.8
48 * 28 (1,344) 1 month650 11.1