===== Scalability Results =====

Model Description

These scalability tests were run using CitcomS 3.2.0 with default configuration. The mesh for these tests is a regional cap with 129x129x129 nodes. Total velocity unknowns is 129^3 x 3 = 6.4 million. The model is run for 11 time steps. The result reported is the total wall clock time. Each node on this cluster has 2 Xeon 5680 series 3.33GHz hex-core processors with a 12MB unified L3 cache and 24GB RAM, for a total of 12 cores per node. The interconnect is QDR InfiniBand.

^Partition^Total Procs^Wall Time (sec)^Speedup^Scalability^
|1x1x1|1|47217|1.000|1.000|
|1x1x2|2|25466|1.854|0.927|
|1x1x4|4|14645|3.224|0.806|
|2x2x1|4|14438|3.270|0.818|
|2x2x2|8|8980|5.258|0.657|
|2x2x4|16|4432|10.654|0.666|
|4x4x1|16|5367|8.798|0.550|
|4x4x2|32|2460|19.194|0.600|
|4x4x4|64|1346|35.079|0.548|
|8x8x2|128|583|80.990|0.633|
|8x8x4|256|337|140.110|0.547|

The input file is {{:software:citcoms:input.sample.zip|available here}}. It is currently configured for 1x1x1 processors, to do different processor divisions you must change the nprocx, nprocy, and nprocz parameters. You must create a folder named "scratch" in the working directory for the output files.  The input file uses the non-Python version of CitcomS, located at CitcomS-3.2.0/bin/CitcomSRegional.