8000 [HIP] Support for `IREE_HAL_EXTERNAL_TIMEPOINT_TYPE_WAIT_PRIMITIVE`. · Issue #20859 · iree-org/iree · GitHub
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[HIP] Support for IREE_HAL_EXTERNAL_TIMEPOINT_TYPE_WAIT_PRIMITIVE. #20859

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benvanik opened this issue May 19, 2025 · 0 comments
Open

[HIP] Support for IREE_HAL_EXTERNAL_TIMEPOINT_TYPE_WAIT_PRIMITIVE. #20859

benvanik opened this issue May 19, 2025 · 0 comments
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hal/hip Runtime HIP HAL backend

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benvanik commented May 19, 2025 •
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To support optimal interop with the CPU HAL backends the HIP semaphore will need to support iree_hal_semaphore_import_timepoint/iree_hal_semaphore_export_timepoint with IREE_HAL_EXTERNAL_TIMEPOINT_TYPE_WAIT_PRIMITIVE. This will allow HIP queue operations to wait on the CPU (via import) and allow CPU queue operations to wait on HIP (export).

I suspect for export we can have callbacks inserted that signal the wait primitives. CUDA has some minor support for importing that HIP may have as well but I'm not sure it's sufficient. For import we'll likely need a poller thread that uses iree_wait_any and then relays back into HIP.
@benvanik benvanik assigned benvanik and unassigned benvanik May 19, 2025
@benvanik benvanik added the hal/hip Runtime HIP HAL backend label May 19, 2025
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