Simulation Logs: Record__LoadBalance - hyschive/gamer-fork GitHub Wiki
This file records the load-balancing information on each level in each MPI process as well as the overall load imbalance. The load imbalance factor is defined as (Max-Ave)/Ave, where Max and Ave are the maximum workload of one process and the average workload among all processes, respectively.
Example:
Time 6.8000000e-01, Step 461, NPatch 333632, NPar 9923891
Rank Level 0 Level 1 Level 2 Level 3 Level 4
0 5.34e+03( -0.33%) 7.52e+03( -0.11%) 1.66e+04( +0.28%) 2.29e+04( +0.27%) 8.88e+04( -0.22%)
1 5.37e+03( +0.30%) 7.53e+03( +0.08%) 1.66e+04( +0.33%) 2.28e+04( -0.13%) 9.06e+04( +1.83%)
2 5.35e+03( -0.16%) 7.51e+03( -0.18%) 1.65e+04( +0.08%) 2.28e+04( -0.24%) 8.81e+04( -0.96%)
3 5.36e+03( +0.07%) 7.54e+03( +0.13%) 1.64e+04( -0.57%) 2.28e+04( -0.27%) 8.76e+04( -1.54%)
4 5.34e+03( -0.27%) 7.53e+03( +0.09%) 1.65e+04( -0.01%) 2.28e+04( -0.10%) 8.89e+04( -0.15%)
5 5.38e+03( +0.44%) 7.53e+03( +0.03%) 1.65e+04( -0.22%) 2.28e+04( +0.04%) 8.93e+04( +0.33%)
6 5.37e+03( +0.20%) 7.52e+03( -0.06%) 1.64e+04( -0.68%) 2.27e+04( -0.41%) 8.93e+04( +0.38%)
7 5.34e+03( -0.26%) 7.53e+03( +0.01%) 1.67e+04( +0.80%) 2.30e+04( +0.84%) 8.93e+04( +0.33%)
---------------------------------------------------------------------------------------------------
Sum: 4.29e+04 6.02e+04 1.32e+05 1.83e+05 7.12e+05
Ave: 5.36e+03 7.53e+03 1.65e+04 2.28e+04 8.90e+04
Max: 5.38e+03 7.54e+03 1.67e+04 2.30e+04 9.06e+04
Imb: 0.44% 0.13% 0.80% 0.84% 1.83%
Weighted load-imbalance factor = 1.40%
---------------------------------------------------------------------------------------------------Table format:
-
Time: physical time -
Step: root-level updates -
NPatch: total number of patches -
NPar: total number of particles -
Rank: MPI rank -
Level: AMR level -
X(Y)in each row:XandYare the estimated workload and load imbalance, respectively -
Sum: total workload on each level -
Ave: average workload on each level -
Max: maximum workload per rank on each level -
Imb: load imbalance on each level defined as(Max-Ave)/Ave -
Weighted load-imbalance factor: overall load imbalance, where the fact that different levels may have different time-steps has been included in the weighting