Characterization of the DOE Mini-apps
EXACT Mini Apps
We collected traces for two applications from the DOE codesign center EXACT: Center for Exascale Simulation of Combustion in Turbulence. These two applications are based on BoxLib library.
EXACT CNS
The first application integrates the Compressible Navier Stokes (CNS) equations with constant viscosity and thermal conductivity. We ran the program with two dataset sizes in a strong scaling mode. The first run parameters are as follows:- number of cells: 512
- maximum grid size: 64
- number of steps: 5
Available traces:
The second run parameters are as follows:
- number of cells: 1024
- maximum grid size: 64
- number of steps: 5
Available traces:
CNS Large 64 processes x 4 threads
CNS Large 256 processes x 1 threads
CNS Large 256 processes x 4 threads
CNS Large 1024 processes x 1 threads
Graphical Presentation of CNS Boxlib Communication Pattern
The following figure shows the amount of data communicated between 1024 cores (for the large dataset). (click on the figure for a higher quality variant)
EXACT Multigrid
The second application is a multigrid solver based on BoxLib. We ran the application with two input sizes. The first run parameters are as follows:
- number of cells: 512
- maximum grid size: 64
- number of steps: 5
Available traces:
MultiGrid 16 processes x 4 threads
MultiGrid 64 processes x 1 threads
MultiGrid 64 processes x 4 threads
MultiGrid 256 processes x 1 threads
MultiGrid 256 processes x 4 threads
The second run parameters are as follows:
- number of cells: 1024
- maximum grid size: 64
- number of steps: 5
Available traces:
MultiGrid Large 64 processes x 4 threads
MultiGrid Large 256 processes x 1 threads
MultiGrid Large 256 processes x 4 threads
MultiGrid Large 1024 processes x 1 threads
Graphical Presentation of Multigrid Communication Pattern
The following figure shows the amount of data communicated between 1024 cores (Large problem size). (click on the figure for a higher quality variant)
