This section shows benchmark results using several Amazon EC2 instances for the standard MPI Scaling tests that are part of the FDS package. They have all been run using AWS ParallelCluster in the same way as described in this workshop.
This case is part of the standard validation suite of cases that comes with FDS. The case has been modified to make the mesh larger (11M cells).
All three graphs show the clear improvement from using the network optimized instance; c5n.18xlarge which includes the Elastic Fabric Adapter (EFA). The C5.24xlarge loses scaling earlier largely because they only have 25Gbit/s of network bandwidth. However it should be noted that the differences are only noticable at lower cells per core, although this is dependant on the problem size and FDS settings e.g solver type.
These graphs are shown per node, per core and cells per core to aid visualization of the results.