workaround for cxil_map write error #161
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preview available: https://docs.tds.cscs.ch/161 |
msimberg
reviewed
Jun 19, 2025
bcumming
reviewed
Jun 19, 2025
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| #### `"cxil_map: write error"` when doing inter-node GPU-aware MPI communication | ||
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| The following environment variable can be set to disable gdrcopy: |
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How about:
This error message is sometimes triggered by applications that use GPU Direct MPI calls when they trigger a bug in gdrcopy (a low-level library used to copy buffers between GPUs).
Setting the following option will completely disable gdrcopy.
Note that this has a performance impact for small message sizes, so it should only be enabled on a case-by-case basis.
You could also mention that it has been used for ICON.
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preview available: https://docs.tds.cscs.ch/161 |
Co-authored-by: Mikael Simberg <[email protected]>
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preview available: https://docs.tds.cscs.ch/161 |
…into cxil_map-write-error
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preview available: https://docs.tds.cscs.ch/161 |
msimberg
reviewed
Jun 30, 2025
Co-authored-by: Mikael Simberg <[email protected]>
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preview available: https://docs.tds.cscs.ch/161 |
bcumming
approved these changes
Jun 30, 2025
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preview available: https://docs.tds.cscs.ch/161 |
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