Improve queue compatibility testing #900
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Usage queues_are_compatible(exec_q, {alloc_q1, alloc_q2, ...}).
Returns true if compatible, false otherwise.
Insteads of invoking 4 copy kernels, it is more expedient to pack them on the host and use single copy kernel to reduce kernel submission overhead.wq
Applied optimization of replacing 3 queue.copy calls to copy shape, src_strides, dst_strides to copy host meta-data into USM allocation for use in copy_and_cast kernel with creating packed vector on the host and using a single queue.copy call of the packed host vector to USM allocation.w
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View rendered docs @ https://intelpython.github.io/dpctl/pulls/900/index.html |
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Sep 7, 2022
… for copy-and-cast operation between two usm_ndarrays
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Merging. |
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Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞 |
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Array API standard conformance tests failed to run for dpctl=0.14.0dev0=py310h8c27c75_78. |
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This introduces
dpctl::utils::queues_are_compatible(exec_q, {alloc_q1, alloc_q2, ...})and deploys it intensor_py.cpp.The check replaces notion of compatibility from queues have equal contexts to queues are equal, aligning check with the logic in
_compute_follows_data.pyx.Furthermore, this PR implements optimization for transfer of shape/strides from host-allocated metadata to kernels.
Previously, transfer was done with 3 or 4 calls to
exec_q.copy. It is replaced with allocation of host temporary where necessarystd::copycalls are made to populate it, followed by a single call toexec_q.copyto copy data into USM allocation for use in kernel.No other logic has changed.