[L0][OpenCL] Emulate Fill with copy when patternSize is not a power of 2 #1412
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This was referenced Mar 5, 2024
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friendly ping @oneapi-src/unified-runtime-level-zero-write @oneapi-src/unified-runtime-opencl-write, could I get a review on this please? |
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…f 2 (#12912) oneapi-src/unified-runtime#1412 --------- Co-authored-by: Kenneth Benzie (Benie) <k.benzie@codeplay.com>
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This PR changes the `queue.fill()` implementation to make use of the native functions for a specific backend. It also unifies that implementation with the one for memset, since it is just an 8-bit subset operation of fill. In the CUDA case, both memset and fill are currently calling `urEnqueueUSMFill` which depending on the size of the filling pattern calls either `cuMemsetD8Async`, `cuMemsetD16Async`, `cuMemsetD32Async` or `commonMemSetLargePattern`. Before this patch memset was using the same thing, just beforehand setting patternSize always to 1 byte which resulted in calling `cuMemsetD8Async`. In other backends, the behaviour is analogous. The fill method was just invoking a `parallel_for` to fill the memory with the pattern which was making this operation quite slow. This PR depends on: - oneapi-src/unified-runtime#1395 - oneapi-src/unified-runtime#1412
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LevelZero changes:
enqueueMemFillHelperto allow calling it with pattern sizes which are not powers of 2. In those cases filling is emulated with copying.OpenCL changes:
isPowerOf2to the USM fill functionThose changes are necessary for the PR: intel/llvm#12702 which refactors
queue.fill()to make use of theurEnqueueUSMFill.intel/llvm CI: intel/llvm#12912