wiki:experiments

Version 4 (modified by daley, 10 years ago) (diff)

further explanation

FLASH Performance Experiment Notes

WD_def problem

We generated a weak scaling curve (WD_weakscaling.pdf) on BG/P using data from 4416, 6144, 8192 processor runs:

Updated numbers, all tests run with updated code, with Paramesh4dev:

Nblocks(ini) Nprocs t_evo  tref         max#blk/proc mem/proc[GiB]
----------------------------------------------------------------
110387       4416   573.8  32.5         29              .5
110387       8192   374.1  24.8         17              .5
154419       6144   609.8  47.5         29              .5
203443       8192   633.9  55.2         29              .5


Rows 1,3,4 constitute the weak scaling curve to be.
Rows 1,2 test strong scaling.



Setup syntax: ./setup WD_def -3d +cube16 -maxblocks=70 +noio -auto +pm4dev -objdir=PM4dev -parfile=[specific flash.par]
Here, "specific flash.par" is:
scaling5_intrepid.par - Row 1 (4416 procs) & Row 2 (8192 procs)
scaling5h_intrepid.par - Row 3 (6144 procs)
scaling6_intrepid.par - Row 4 (8192 procs)

t_evo is the total evolution time