Avinash Kethineedi
eb5a38e806
* Update(DeviceProxy): Dynamically Determine Memory Allocation Size & Remove Compile-Time size Calculations - Modified the Device proxy class to determine memory allocation size at runtime. - Updated all classes that include the Device proxy to use dynamic memory allocation. - Removed compile-time memory size calculations. - Ensured the allocated number of backend queue data structures matches the number of RO device contexts.
110 строки
4.0 KiB
C++
110 строки
4.0 KiB
C++
/******************************************************************************
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* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*****************************************************************************/
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#ifndef LIBRARY_SRC_REVERSE_OFFLOAD_QUEUE_DESC_PROXY_HPP_
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#define LIBRARY_SRC_REVERSE_OFFLOAD_QUEUE_DESC_PROXY_HPP_
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#include "../device_proxy.hpp"
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namespace rocshmem {
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typedef struct queue_desc {
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/**
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* Read index for the queue. Rarely read by the GPU when it thinks the
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* queue might be full, but the GPU normally uses a local copy that lags
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* behind the true read_index.
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*/
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uint64_t read_index;
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char padding1[56];
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/**
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* Write index for the queue. Never accessed by CPU, since it uses the
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* valid bit in the packet itself to determine whether there is data to
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* consume. The GPU has a local copy of the write_index that it uses, but it
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* does write the local index to this location when the kernel completes
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* in case the queue needs to be reused without resetting all the pointers
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* to zero.
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*/
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uint64_t write_index;
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char padding2[56];
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/**
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* This bit is used by the GPU to wait on a blocking operation. The initial
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* value is 0. When a GPU enqueues a blocking operation, it waits for this
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* value to resolve to 1, which is set by the CPU when the blocking
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* operation completes. The GPU then resets status back to zero. There is
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* a separate status variable for each work-item in a work-group
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*/
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char *status;
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char padding3[56];
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} __attribute__((__aligned__(64))) queue_desc_t;
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template <typename ALLOCATOR>
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class QueueDescProxy {
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using ProxyT = DeviceProxy<ALLOCATOR, queue_desc_t>;
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using ProxyStatusT = DeviceProxy<ALLOCATOR, char>;
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public:
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QueueDescProxy() = default;
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QueueDescProxy(size_t max_queues, size_t max_threads_per_queue)
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: max_queues_{max_queues}, max_threads_per_queue_{max_threads_per_queue},
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max_threads_{max_queues * max_threads_per_queue}, proxy_{max_queues},
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proxy_status_{max_queues * max_threads_per_queue} {
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auto *status{proxy_status_.get()};
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size_t status_bytes{sizeof(char) * max_threads_};
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memset(status, 0, status_bytes);
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auto *queue_descs{proxy_.get()};
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for (size_t i{0}; i < max_queues_; i++) {
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queue_descs[i].read_index = 0;
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queue_descs[i].write_index = 0;
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queue_descs[i].status = status + i * max_threads_per_queue_;
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}
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}
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QueueDescProxy(const QueueDescProxy& other) = delete;
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QueueDescProxy& operator=(const QueueDescProxy& other) = delete;
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QueueDescProxy(QueueDescProxy&& other) = default;
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QueueDescProxy& operator=(QueueDescProxy&& other) = default;
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__host__ __device__ queue_desc_t *get() { return proxy_.get(); }
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private:
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ProxyT proxy_{};
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ProxyStatusT proxy_status_{};
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size_t max_queues_{};
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size_t max_threads_per_queue_{};
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size_t max_threads_{};
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};
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using QueueDescProxyT = QueueDescProxy<HIPDefaultFinegrainedAllocator>;
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} // namespace rocshmem
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#endif // LIBRARY_SRC_REVERSE_OFFLOAD_QUEUE_DESC_PROXY_HPP_
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