Simulation Logs: Record__PatchCount

This file records the patch allocation and distribution. The patch dimension is currently fixed to (8, 8, 8).

Example:

Time = 0.0000000e+00,  Step =       0,  NPatch =     258184

Rank        Level 0         Level 1         Level 2         Level 3         Level 4         Level 5
   0    928( 90.62%)   1088( 13.28%)   4376(  6.68%)  17360(  3.31%)  39160(  0.93%)      0(  0.00%)
   1   1120(109.38%)   1424( 17.38%)   5216(  7.96%)  18272(  3.49%)  40128(  0.96%)      0(  0.00%)
   2   1120(109.38%)   1432( 17.48%)   5224(  7.97%)  18272(  3.49%)  40136(  0.96%)      0(  0.00%)
   3    928( 90.62%)   1088( 13.28%)   4376(  6.68%)  17368(  3.31%)  39168(  0.93%)      0(  0.00%)
----------------------------------------------------------------------------------------------------
Sum:   4096(100.00%)   5032( 15.36%)  19192(  7.32%)  71272(  3.40%) 158592(  0.95%)      0(  0.00%)
Ave:   1024.00         1258.00         4798.00        17818.00        39648.00            0.00
Imb:   1120(  9.38%)   1432( 13.83%)   5224(  8.88%)  18272(  2.55%)  40136(  1.23%)      0(  0.00%)
Weighted load-imbalance factor =   1.70%
----------------------------------------------------------------------------------------------------

Table format:

• Time: physical time
• Step: number of root-level updates
• NPatch: total number of patches currently allocated on all levels in all MPI processes
• Rank: MPI rank
• Level: AMR level
• X(Y) in each row except for Imb: X is the number of patches and Y is the volume-filling fraction
• Sum: total number of patches on each level
• Ave: average number of patches per MPI process on each level
• Imb: each X(Y) shows the maximum number of patches in one MPI process (X) and the corresponding load imbalance (Y), estimated by (maximum-average)/average
• Weighted load-imbalance factor: overall load imbalance, where different levels are weighted by their number of updates (i.e., time-steps)

Caution: buffer patches (i.e., patches for filling the ghost zones) are not included here.

Links

• Simulation Logs