Enable creation of bindless images backed by host USM #2551
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DBDuncan
approved these changes
Jan 13, 2025
GeorgeWeb
approved these changes
Jan 14, 2025
Small patch to enable bindless images backed by host USM in the CUDA adapter. Host and Device USM pointers are usable across the host and device for all versions of CUDA that we support. There is no need to provide the `CU_MEMHOSTALLOC_DEVICEMAP` flag during allocation, or calling `cuMemHostGetDevicePointer` to retrieve a device usable address. Passing a `CU_MEMHOSTALLOC_WRITECOMBINED` flag to the host USM allocation will enhance performance in certain scenarios, however, an extension allowing this is not yet available.
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I've removed ready to merge as intel/llvm#16607 still requires approvals (except from unified-runtime-reviewers) and must have all checks passing. Please add the lable again once these conditions are satisfied. |
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Small patch to enable bindless images backed by host USM in the CUDA adapter.
Host and Device USM pointers are usable across the host and device for all versions of CUDA that we support. There is no need to provide the
CU_MEMHOSTALLOC_DEVICEMAPflag during allocation, or callingcuMemHostGetDevicePointerto retrieve a device usable address.Passing a
CU_MEMHOSTALLOC_WRITECOMBINEDflag to the host USM allocation will enhance performance in certain scenarios, however, an extension allowing this is not yet available.Related DPC++ PR: intel/llvm#16607