== 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	1||28	||583	||80.990	||0.633||
||8x8x4	||256	||337	||140.110	||0.547||

The input file is available [/projects/citcoms/files/download?asset=input.sample.zip 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.