Simulation Logs: Record__Performance

The file records the code performance.

Example:

#         Time          Step               dt         NCell  NUpdate_Cell   ElapsedTime  Perf_Overall  Perf_PerRank     NParticle   NUpdate_Par  ParPerf_Overall  ParPerf_PerRank   NUpdate_Lv0   NUpdate_Lv1   NUpdate_Lv2   NUpdate_Lv3   NUpdate_Lv4   NUpdate_Lv5
 2.9144818e-03             1    2.9144818e-03      1.32e+08      2.29e+09      3.53e+01      6.48e+07      1.62e+07      6.68e+06      1.43e+08         4.04e+06         1.01e+06             1             2             4             8            24             0
 5.8224630e-03             2    2.9079812e-03      1.32e+08      2.30e+09      3.61e+01      6.36e+07      1.59e+07      6.68e+06      1.43e+08         3.95e+06         9.89e+05             1             2             4             8            24             0
 8.7230441e-03             3    2.9005811e-03      1.32e+08      2.29e+09      3.64e+01      6.28e+07      1.57e+07      6.68e+06      1.43e+08         3.92e+06         9.80e+05             1             2             4             8            24             0
 1.0000000e-02             4    1.2769559e-03      1.32e+08      1.06e+09      2.51e+01      4.24e+07      1.06e+07      6.68e+06      6.59e+07         2.62e+06         6.56e+05             1             1             2             4            11             0

Table format:

• Time: physical time
• Step: cumulative number of root-level updates
• dt: root-level time-step
• NCell: total number of cells
• NUpdate_Cell: total number of cell updates
• ElapsedTime: wall-clock time used by this step (in second)
• Perf_Overall: overall performance in cell updates per second
• Perf_PerRank: average performance per MPI process in cell updates per second
• NParticle: total number of particles
• NUpdate_Par: total number of particle updates
• ParPerf_Overall: overall performance in particle updates per second
• ParPerf_PerRank: average performance per MPI process in particle updates per second
• NUpdate_Lv*: number of time-steps on this level in this step

On Tesla K20 or K40 GPUs, the typical performance per GPU is 1e7 ~ 2e7 cell updates per second. Tesla P100 can be a factor of 2 faster.

Links

• Simulation Logs