32df9733d1
Summary: Add option write_buffer_manager to help users control total memory spent on memtables across multiple DB instances. Test Plan: Add a new unit test. Reviewers: yhchiang, IslamAbdelRahman Reviewed By: IslamAbdelRahman Subscribers: adela, benj, sumeet, muthu, leveldb, andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D59925
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/memtable_allocator.h"
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#include <assert.h>
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#include "rocksdb/write_buffer_manager.h"
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#include "util/arena.h"
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namespace rocksdb {
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MemTableAllocator::MemTableAllocator(Allocator* allocator,
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WriteBufferManager* write_buffer_manager)
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: allocator_(allocator),
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write_buffer_manager_(write_buffer_manager),
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bytes_allocated_(0) {}
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MemTableAllocator::~MemTableAllocator() { DoneAllocating(); }
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char* MemTableAllocator::Allocate(size_t bytes) {
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assert(write_buffer_manager_ != nullptr);
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bytes_allocated_.fetch_add(bytes, std::memory_order_relaxed);
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write_buffer_manager_->ReserveMem(bytes);
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return allocator_->Allocate(bytes);
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}
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char* MemTableAllocator::AllocateAligned(size_t bytes, size_t huge_page_size,
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Logger* logger) {
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assert(write_buffer_manager_ != nullptr);
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bytes_allocated_.fetch_add(bytes, std::memory_order_relaxed);
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write_buffer_manager_->ReserveMem(bytes);
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return allocator_->AllocateAligned(bytes, huge_page_size, logger);
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}
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void MemTableAllocator::DoneAllocating() {
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if (write_buffer_manager_ != nullptr) {
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write_buffer_manager_->FreeMem(
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bytes_allocated_.load(std::memory_order_relaxed));
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write_buffer_manager_ = nullptr;
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}
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}
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size_t MemTableAllocator::BlockSize() const { return allocator_->BlockSize(); }
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} // namespace rocksdb
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