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[Allocator] add new allocator strategy (#62638)
* add new allocator strategy
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170 changes: 170 additions & 0 deletions
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paddle/fluid/memory/allocation/auto_growth_best_fit_allocator_v2.cc
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| // Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| #if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP) | ||
| #include "paddle/fluid/memory/allocation/auto_growth_best_fit_allocator_v2.h" | ||
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| #include <algorithm> | ||
| #include <mutex> // NOLINT | ||
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| #include "paddle/fluid/memory/allocation/aligned_allocator.h" | ||
| #include "paddle/fluid/platform/cuda_device_guard.h" | ||
| #include "paddle/fluid/platform/device/gpu/gpu_info.h" | ||
| #include "paddle/fluid/platform/flags.h" | ||
| #include "paddle/fluid/platform/profiler/event_tracing.h" | ||
| #include "paddle/phi/backends/device_manager.h" | ||
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| PD_DECLARE_bool(free_idle_chunk); | ||
| PD_DECLARE_bool(free_when_no_cache_hit); | ||
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| namespace paddle { | ||
| namespace memory { | ||
| namespace allocation { | ||
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| AutoGrowthBestFitAllocatorV2::AutoGrowthBestFitAllocatorV2( | ||
| const std::shared_ptr<Allocator> &underlying_allocator, | ||
| size_t alignment, | ||
| platform::CUDAPlace place, | ||
| size_t chunk_size, | ||
| bool allow_free_idle_chunk, | ||
| int extra_padding_size) | ||
| : AutoGrowthBestFitAllocator(underlying_allocator, | ||
| alignment, | ||
| chunk_size, | ||
| true, | ||
| extra_padding_size), | ||
| place_(place) {} | ||
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| phi::Allocation *AutoGrowthBestFitAllocatorV2::AllocateImpl( | ||
| size_t unaligned_size) { | ||
| platform::RecordEvent record("AutoGrowthBestFitAllocatorV2::Allocate", | ||
| platform::TracerEventType::UserDefined, | ||
| 9 /*level*/); | ||
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| size_t size = AlignedSize(unaligned_size + extra_padding_size_, alignment_); | ||
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| VLOG(10) << "Allocate " << unaligned_size << " bytes, aligned to " << size | ||
| << ", extra size " << extra_padding_size_; | ||
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| std::lock_guard<SpinLock> guard(spinlock_); | ||
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| BlockIt block_it; | ||
| if (AutoGrowthBestFitAllocatorV2State::GetInstance().IsWarmup()) { | ||
| auto iter = free_blocks_.lower_bound(std::make_pair(size, nullptr)); | ||
| if (iter != free_blocks_.end() && iter->second->size_ >= unaligned_size && | ||
| iter->second->size_ <= size) { | ||
| block_it = iter->second; | ||
| free_blocks_.erase(iter); | ||
| block_it->is_free_ = false; | ||
| VLOG(10) << "Allocate " << size << " bytes from chunk size " | ||
| << block_it->size_ << " by strict_matching_state."; | ||
| } else { | ||
| size_t actual_avail, actual_total; | ||
| { | ||
| platform::CUDADeviceGuard guard(place_.device); | ||
| #ifdef PADDLE_WITH_HIP | ||
| auto result = hipMemGetInfo(&actual_avail, &actual_total); | ||
| #else | ||
| auto result = cudaMemGetInfo(&actual_avail, &actual_total); | ||
| #endif | ||
| if (result != gpuSuccess) { | ||
| actual_avail = 0; | ||
| } | ||
| } | ||
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| if (actual_avail < size) { | ||
| FreeIdleChunks(); | ||
| } | ||
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| chunks_.emplace_back(static_unique_ptr_cast<Allocation>( | ||
| underlying_allocator_->Allocate(size))); | ||
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| auto *chunk = &(*chunks_.rbegin()); | ||
| size = chunk->allocation_->size(); | ||
| uint8_t *p = reinterpret_cast<uint8_t *>(chunk->allocation_->ptr()); | ||
| auto &blocks = chunk->blocks_; | ||
| blocks.emplace_back(p, size, false, chunk); | ||
| block_it = --(blocks.end()); | ||
| VLOG(2) << "Not found and reallocate " << size << "(" | ||
| << static_cast<void *>(p) << ") by strict_matching_state."; | ||
| } | ||
| } else { | ||
| if (is_first_switch_to_regular_) { | ||
| FreeIdleChunks(); | ||
| is_first_switch_to_regular_ = false; | ||
| } | ||
| auto iter = free_blocks_.lower_bound(std::make_pair(size, nullptr)); | ||
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| if (iter != free_blocks_.end()) { | ||
| block_it = iter->second; | ||
| free_blocks_.erase(iter); | ||
| auto *chunk = block_it->chunk_; | ||
| size_t remaining_size = block_it->size_ - size; | ||
| VLOG(10) << "Allocate " << size << " bytes from chunk size " | ||
| << block_it->size_ << ", remaining " << remaining_size; | ||
| if (remaining_size == 0) { | ||
| block_it->is_free_ = false; | ||
| } else { | ||
| auto remaining_free_block = chunk->blocks_.insert( | ||
| block_it, Block(block_it->ptr_, remaining_size, true, chunk)); | ||
| free_blocks_.emplace(std::make_pair(remaining_size, block_it->ptr_), | ||
| remaining_free_block); | ||
| block_it->ptr_ = | ||
| reinterpret_cast<uint8_t *>(block_it->ptr_) + remaining_size; | ||
| block_it->size_ = size; | ||
| block_it->is_free_ = false; | ||
| } | ||
| } else { | ||
| if (FLAGS_free_when_no_cache_hit) { | ||
| FreeIdleChunks(); | ||
| } | ||
| size_t realloc_size = std::max(size, chunk_size_); | ||
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| try { | ||
| chunks_.emplace_back(static_unique_ptr_cast<Allocation>( | ||
| underlying_allocator_->Allocate(realloc_size))); | ||
| } catch (BadAlloc &ex) { | ||
| if (FLAGS_free_when_no_cache_hit) throw ex; | ||
| FreeIdleChunks(); | ||
| chunks_.emplace_back(static_unique_ptr_cast<Allocation>( | ||
| underlying_allocator_->Allocate(realloc_size))); | ||
| } | ||
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| auto *chunk = &(*chunks_.rbegin()); | ||
| realloc_size = chunk->allocation_->size(); | ||
| uint8_t *p = reinterpret_cast<uint8_t *>(chunk->allocation_->ptr()); | ||
| auto &blocks = chunk->blocks_; | ||
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| size_t remaining_size = realloc_size - size; | ||
| if (remaining_size > 0) { | ||
| blocks.emplace_back(p, remaining_size, true, chunk); | ||
| free_blocks_.emplace(std::make_pair(remaining_size, p), | ||
| --(blocks.end())); | ||
| } | ||
| blocks.emplace_back(p + remaining_size, size, false, chunk); | ||
| block_it = --(blocks.end()); | ||
| VLOG(2) << "Not found and reallocate " << realloc_size << "(" | ||
| << static_cast<void *>(p) << "), and remaining " | ||
| << remaining_size; | ||
| } | ||
| } | ||
| ++total_alloc_times_; | ||
| total_alloc_size_ += size; | ||
| VLOG(10) << "Alloc " << block_it->size_ << " bytes, ptr = " << block_it->ptr_; | ||
| return new BlockAllocation(block_it); | ||
| } | ||
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| } // namespace allocation | ||
| } // namespace memory | ||
| } // namespace paddle | ||
| #endif |
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