forked from huawei/mindspore2022
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
/**
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* Copyright 2019 Huawei Technologies Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MINDSPORE_CCSRC_DEVICE_GPU_CUDA_DRIVER_H_
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#define MINDSPORE_CCSRC_DEVICE_GPU_CUDA_DRIVER_H_
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#include <cuda_runtime_api.h>
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namespace mindspore {
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namespace device {
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namespace gpu {
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typedef void *DeviceStream;
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typedef void *DeviceEvent;
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typedef void *HostMemPtr;
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typedef void *DeviceMemPtr;
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class CudaDriver {
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public:
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// Encapsulate the cuda APIs associated with memory operations
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// such as malloc/free and memory copy from host to device and reverse.
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static size_t AllocDeviceMem(size_t size, DeviceMemPtr *addr);
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static bool FreeDeviceMem(const DeviceMemPtr &addr);
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static bool CopyHostMemToDevice(const DeviceMemPtr &dst, const void *src, size_t size);
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static bool CopyDeviceMemToHost(const HostMemPtr &dst, const DeviceMemPtr &src, size_t size);
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static size_t total_mem_size();
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static size_t free_mem_size();
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// Encapsulate the cuda APIs associated with device resource
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// such as Stream and Event.
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static bool CreateStream(DeviceStream *stream);
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static bool DestroyStream(const DeviceStream &stream);
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static bool SyncStream(const DeviceStream &stream);
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// Encapsulate the cuda APIs associated with device management.
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static int device_count();
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static bool set_current_device(int index);
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private:
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CudaDriver() = delete;
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~CudaDriver() = delete;
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CudaDriver(const CudaDriver &) = delete;
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CudaDriver &operator=(const CudaDriver &) = delete;
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static constexpr float mem_malloc_retry_rate_{0.99};
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static constexpr size_t mem_malloc_retry_conut_max_{10};
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static constexpr size_t mem_malloc_align_size_{4};
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};
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} // namespace gpu
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} // namespace device
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} // namespace mindspore
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#endif // MINDSPORE_CCSRC_DEVICE_GPU_CUDA_DRIVER_H_
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