48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
# mpi_test
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Various standalone C++ MPI tests/examples/benchmarks.
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If CUDA is detected, additional binaries can be built.
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| name | Kind | Reqs. | Ranks | Description |
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|---------------|-----------|----------|-------|-------------|
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|`hello-world` | Test | MPI | 1+ | an MPI hello-world |
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|`one-sided` | Test | MPI | 2 | one-sided communication |
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|`one-sided-gpu`| Test | MPI+CUDA | 2 | one-sided communication on GPU buffer |
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|`persistent` | Benchmark | MPI | 2 | ping-pong time for persistent Send/Recv |
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|`send-recv` | Benchmark | MPI | 2 | ping-pong time for Send/Recv |
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## Build
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```
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mkdir build && cd build
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cmake ..
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make
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```
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## Run all tests
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`run-all.sh` attempts to discover certain environments automatically.
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You can always override the detected flags yourself if you want.
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```
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./run-all.sh | grep 'PASS\|FAIL'
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```
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If any tests fails, you can re-run them individually.
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## Run individual tests
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Execute any binary you want using `mpirun`, or whatever is appropriate for your platform.
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## Examples
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### Summit
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1 node: `jsrun -n 1 ./persistent`
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2 nodes: `jsrun -n 2 -r 1 -a 1 ./persistent`
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## Notes on specific platforms
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Some Open MPIs use `long long` for their datatypes, which means we can't support ANSI C++ (`-ansi`).
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