| 1 | //===------ State.cpp - OpenMP State & ICV interface ------------- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | //===----------------------------------------------------------------------===// |
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| 10 | |
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| 11 | #include "Shared/Environment.h" |
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| 12 | |
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| 13 | #include "Allocator.h" |
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| 14 | #include "Configuration.h" |
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| 15 | #include "DeviceTypes.h" |
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| 16 | #include "DeviceUtils.h" |
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| 17 | #include "Mapping.h" |
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| 18 | #include "Synchronization.h" |
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| 19 | |
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| 20 | using namespace ompx; |
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| 21 | |
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| 22 | [[gnu::used, gnu::retain, gnu::weak, |
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| 23 | gnu::visibility( |
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| 24 | "protected" )]] DeviceMemoryPoolTy __omp_rtl_device_memory_pool; |
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| 25 | [[gnu::used, gnu::retain, gnu::weak, |
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| 26 | gnu::visibility("protected" )]] DeviceMemoryPoolTrackingTy |
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| 27 | __omp_rtl_device_memory_pool_tracker; |
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| 28 | |
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| 29 | /// Stateless bump allocator that uses the __omp_rtl_device_memory_pool |
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| 30 | /// directly. |
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| 31 | struct BumpAllocatorTy final { |
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| 32 | |
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| 33 | void *alloc(uint64_t Size) { |
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| 34 | Size = utils::roundUp(Size, uint64_t(allocator::ALIGNMENT)); |
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| 35 | |
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| 36 | if (config::isDebugMode(DeviceDebugKind::AllocationTracker)) { |
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| 37 | atomic::add(&__omp_rtl_device_memory_pool_tracker.NumAllocations, 1, |
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| 38 | atomic::seq_cst); |
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| 39 | atomic::add(&__omp_rtl_device_memory_pool_tracker.AllocationTotal, Size, |
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| 40 | atomic::seq_cst); |
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| 41 | atomic::min(&__omp_rtl_device_memory_pool_tracker.AllocationMin, Size, |
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| 42 | atomic::seq_cst); |
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| 43 | atomic::max(&__omp_rtl_device_memory_pool_tracker.AllocationMax, Size, |
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| 44 | atomic::seq_cst); |
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| 45 | } |
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| 46 | |
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| 47 | uint64_t *Data = |
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| 48 | reinterpret_cast<uint64_t *>(&__omp_rtl_device_memory_pool.Ptr); |
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| 49 | uint64_t End = |
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| 50 | reinterpret_cast<uint64_t>(Data) + __omp_rtl_device_memory_pool.Size; |
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| 51 | |
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| 52 | uint64_t OldData = atomic::add(Data, Size, atomic::seq_cst); |
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| 53 | if (OldData + Size > End) |
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| 54 | __builtin_trap(); |
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| 55 | |
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| 56 | return reinterpret_cast<void *>(OldData); |
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| 57 | } |
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| 58 | |
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| 59 | void free(void *) {} |
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| 60 | }; |
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| 61 | |
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| 62 | BumpAllocatorTy BumpAllocator; |
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| 63 | |
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| 64 | /// allocator namespace implementation |
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| 65 | /// |
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| 66 | ///{ |
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| 67 | |
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| 68 | void allocator::init(bool IsSPMD, KernelEnvironmentTy &KernelEnvironment) { |
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| 69 | // TODO: Check KernelEnvironment for an allocator choice as soon as we have |
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| 70 | // more than one. |
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| 71 | } |
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| 72 | |
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| 73 | void *allocator::alloc(uint64_t Size) { return BumpAllocator.alloc(Size); } |
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| 74 | |
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| 75 | void allocator::free(void *Ptr) { BumpAllocator.free(Ptr); } |
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| 76 | |
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| 77 | ///} |
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| 78 | |
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