Initial implementation of async execution.#91
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* Only implements async execution and asynd d2h. * Need to come up with a better way to bridge async completion signals to EventInstance::OnReady callback. * There is room here for more of a scheduler that has some knowledge of the transfer and execution timeline. Will be needed when joining h2d transfer timelines.
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benvanik
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Jan 17, 2023
| /*wait_semaphore_list=*/iree_hal_fence_semaphore_list(done_fence()), | ||
| /*signal_semaphore_list=*/iree_hal_semaphore_list_empty(), | ||
| iree_hal_buffer_view_buffer(buffer_view_.get())); | ||
| return iree_ok_status(); |
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| return iree_ok_status(); |
| // Import the destination (host) buffer as an iree_hal_buffer_t so that we | ||
| // can issue copy commands. | ||
| iree::vm::ref<iree_hal_buffer_t> dst_buffer; | ||
| iree_hal_buffer_params_t dst_buffer_params = { |
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you'll want to set the type to IREE_HAL_MEMORY_TYPE_HOST_LOCAL | IREE_HAL_MEMORY_TYPE_DEVICE_VISIBLE
| IREE_RETURN_IF_ERROR(iree_hal_device_queue_execute( | ||
| device_.device(), IREE_HAL_QUEUE_AFFINITY_ANY, | ||
| /*wait_semaphore_list=*/iree_hal_fence_semaphore_list(ready_fence_.get()), | ||
| /*signal_semaphore_list=*/iree_hal_semaphore_list_empty(), |
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RE comment above: you'll want a signal fence for this so when it's implemented you'll be able to hook on to that to get your event signal callback (or ideally if it's a standard event type like an fd/HANDLE import it so we can signal it directly from the GPU). You'll at least need the signal so that you ensure you don't schedule more work while this copy is outstanding: you need to make sure nothing is able to mutate the device buffer.
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| // IREE_RETURN_IF_ERROR(iree_hal_fence_create_at(transfer_timeline_.get(), 0, | ||
| // client_.host_allocator(), | ||
| // &transfer_now_fence_)); |
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| // IREE_RETURN_IF_ERROR(iree_hal_fence_create_at(transfer_timeline_.get(), 0, | |
| // client_.host_allocator(), | |
| // &transfer_now_fence_)); |
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