[SYCL][UR] Add max_threads_per_compute_unit device query#22666
Open
zjin-lcf wants to merge 1 commit into
Open
Conversation
Expose the maximum number of work-items (threads) that can be resident on a single compute unit, which CUDA and HIP report as CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR and hipDeviceAttributeMaxThreadsPerMultiProcessor respectively. This complements the existing ext::oneapi::info::device::num_compute_units query and lets applications reason about per-SM/CU occupancy in a backend-portable way. Plumbing (mirrors num_compute_units): - UR: new optional-query UR_DEVICE_INFO_MAX_THREADS_PER_COMPUTE_UNIT (device.yml + generated ur_api.h/ur_print.hpp). - Adapters: implemented in the CUDA and HIP adapters; other backends fall through to the existing UNSUPPORTED_ENUMERATION default, as befits an optional query. - SYCL: new ext::oneapi::info::device::max_threads_per_compute_unit descriptor (return_type size_t), runtime dispatch in device_impl.hpp, return-type map entry, and explicit template instantiation in device.cpp. - Updated the Linux/Windows ABI symbol dumps for the new instantiation. Co-authored-by: Cursor <cursoragent@cursor.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Expose the maximum number of work-items (threads) that can be resident on a single compute unit, which CUDA and HIP report as
CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR and hipDeviceAttributeMaxThreadsPerMultiProcessor respectively. This complements the existing ext::oneapi::info::device::num_compute_units query and lets applications reason about per-SM/CU occupancy in a backend-portable way.
Plumbing (mirrors num_compute_units):