7d1c661381
This is a patch in preparation for the support stream ordered memory allocator in CUDA Fortran. This patch adds an asynchronous id to the AllocatableAllocate runtime function and to Descriptor::Allocate so it can be passed down to the registered allocator. It is up to the allocator to use this value or not. A follow up patch will implement that asynchronous allocator for CUDA Fortran.
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
//===-- runtime/CUDA/allocatable.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/allocatable.h"
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#include "../assign-impl.h"
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#include "../stat.h"
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#include "../terminator.h"
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#include "flang/Runtime/CUDA/common.h"
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#include "flang/Runtime/CUDA/descriptor.h"
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#include "flang/Runtime/CUDA/memmove-function.h"
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#include "flang/Runtime/allocatable.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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RT_EXT_API_GROUP_BEGIN
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int RTDEF(CUFAllocatableAllocateSync)(Descriptor &desc, int64_t stream,
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bool hasStat, const Descriptor *errMsg, const char *sourceFile,
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int sourceLine) {
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int stat{RTNAME(CUFAllocatableAllocate)(
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desc, stream, hasStat, errMsg, sourceFile, sourceLine)};
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#ifndef RT_DEVICE_COMPILATION
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// Descriptor synchronization is only done when the allocation is done
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// from the host.
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if (stat == StatOk) {
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void *deviceAddr{
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RTNAME(CUFGetDeviceAddress)((void *)&desc, sourceFile, sourceLine)};
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RTNAME(CUFDescriptorSync)
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((Descriptor *)deviceAddr, &desc, sourceFile, sourceLine);
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}
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#endif
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return stat;
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}
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int RTDEF(CUFAllocatableAllocate)(Descriptor &desc, int64_t stream,
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bool hasStat, const Descriptor *errMsg, const char *sourceFile,
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int sourceLine) {
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if (desc.HasAddendum()) {
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Terminator terminator{sourceFile, sourceLine};
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// TODO: This require a bit more work to set the correct type descriptor
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// address
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terminator.Crash(
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"not yet implemented: CUDA descriptor allocation with addendum");
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}
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// Perform the standard allocation.
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int stat{RTNAME(AllocatableAllocate)(
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desc, stream, hasStat, errMsg, sourceFile, sourceLine)};
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return stat;
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}
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int RTDEF(CUFAllocatableAllocateSource)(Descriptor &alloc,
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const Descriptor &source, int64_t stream, bool hasStat,
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const Descriptor *errMsg, const char *sourceFile, int sourceLine) {
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int stat{RTNAME(CUFAllocatableAllocate)(
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alloc, stream, hasStat, errMsg, sourceFile, sourceLine)};
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if (stat == StatOk) {
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Terminator terminator{sourceFile, sourceLine};
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Fortran::runtime::DoFromSourceAssign(
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alloc, source, terminator, &MemmoveHostToDevice);
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}
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return stat;
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}
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int RTDEF(CUFAllocatableAllocateSourceSync)(Descriptor &alloc,
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const Descriptor &source, int64_t stream, bool hasStat,
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const Descriptor *errMsg, const char *sourceFile, int sourceLine) {
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int stat{RTNAME(CUFAllocatableAllocateSync)(
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alloc, stream, hasStat, errMsg, sourceFile, sourceLine)};
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if (stat == StatOk) {
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Terminator terminator{sourceFile, sourceLine};
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Fortran::runtime::DoFromSourceAssign(
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alloc, source, terminator, &MemmoveHostToDevice);
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}
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return stat;
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}
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int RTDEF(CUFAllocatableDeallocate)(Descriptor &desc, bool hasStat,
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const Descriptor *errMsg, const char *sourceFile, int sourceLine) {
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// Perform the standard allocation.
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int stat{RTNAME(AllocatableDeallocate)(
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desc, hasStat, errMsg, sourceFile, sourceLine)};
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#ifndef RT_DEVICE_COMPILATION
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// Descriptor synchronization is only done when the deallocation is done
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// from the host.
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if (stat == StatOk) {
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void *deviceAddr{
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RTNAME(CUFGetDeviceAddress)((void *)&desc, sourceFile, sourceLine)};
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RTNAME(CUFDescriptorSync)
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((Descriptor *)deviceAddr, &desc, sourceFile, sourceLine);
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}
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#endif
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return stat;
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}
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RT_EXT_API_GROUP_END
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} // extern "C"
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} // namespace Fortran::runtime::cuda
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