cdf447baa5
This patch adds new runtime entry points that perform the simple allocation/deallocation of module allocatable variable with cuda attributes. When the allocation is initiated on the host, the descriptor on the device is synchronized. Both descriptors point to the same data on the device. This is the first PR of a stack.
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
//===-- runtime/CUDA/allocator.cpp ----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "flang/Runtime/CUDA/allocator.h"
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#include "../derived.h"
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#include "../stat.h"
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#include "../terminator.h"
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#include "../type-info.h"
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#include "flang/Common/Fortran.h"
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#include "flang/ISO_Fortran_binding_wrapper.h"
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#include "flang/Runtime/CUDA/common.h"
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#include "flang/Runtime/allocator-registry.h"
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#include "cuda_runtime.h"
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namespace Fortran::runtime::cuda {
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extern "C" {
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void RTDEF(CUFRegisterAllocator)() {
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allocatorRegistry.Register(
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kPinnedAllocatorPos, {&CUFAllocPinned, CUFFreePinned});
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allocatorRegistry.Register(
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kDeviceAllocatorPos, {&CUFAllocDevice, CUFFreeDevice});
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allocatorRegistry.Register(
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kManagedAllocatorPos, {&CUFAllocManaged, CUFFreeManaged});
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allocatorRegistry.Register(
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kUnifiedAllocatorPos, {&CUFAllocUnified, CUFFreeUnified});
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}
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}
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void *CUFAllocPinned(std::size_t sizeInBytes) {
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void *p;
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CUDA_REPORT_IF_ERROR(cudaMallocHost((void **)&p, sizeInBytes));
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return p;
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}
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void CUFFreePinned(void *p) { CUDA_REPORT_IF_ERROR(cudaFreeHost(p)); }
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void *CUFAllocDevice(std::size_t sizeInBytes) {
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void *p;
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CUDA_REPORT_IF_ERROR(cudaMalloc(&p, sizeInBytes));
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return p;
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}
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void CUFFreeDevice(void *p) { CUDA_REPORT_IF_ERROR(cudaFree(p)); }
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void *CUFAllocManaged(std::size_t sizeInBytes) {
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void *p;
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CUDA_REPORT_IF_ERROR(
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cudaMallocManaged((void **)&p, sizeInBytes, cudaMemAttachGlobal));
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return reinterpret_cast<void *>(p);
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}
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void CUFFreeManaged(void *p) { CUDA_REPORT_IF_ERROR(cudaFree(p)); }
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void *CUFAllocUnified(std::size_t sizeInBytes) {
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// Call alloc managed for the time being.
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return CUFAllocManaged(sizeInBytes);
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}
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void CUFFreeUnified(void *p) {
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// Call free managed for the time being.
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CUFFreeManaged(p);
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}
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} // namespace Fortran::runtime::cuda
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