e17aef9467
Modify the implementation of MemTracker: 1. Simplify a lot of useless logic; 2. Added MemTrackerTaskPool, as the ancestor of all query and import trackers, This is used to track the local memory usage of all tasks executing; 3. Add cosume/release cache, trigger a cosume/release when the memory accumulation exceeds the parameter mem_tracker_consume_min_size_bytes; 4. Add a new memory leak detection mode (Experimental feature), throw an exception when the remaining statistical value is greater than the specified range when the MemTracker is destructed, and print the accurate statistical value in HTTP, the parameter memory_leak_detection 5. Added Virtual MemTracker, cosume/release will not sync to parent. It will be used when introducing TCMalloc Hook to record memory later, to record the specified memory independently; 6. Modify the GC logic, register the buffer cached in DiskIoMgr as a GC function, and add other GC functions later; 7. Change the global root node from Root MemTracker to Process MemTracker, and remove Process MemTracker in exec_env; 8. Modify the macro that detects whether the memory has reached the upper limit, modify the parameters and default behavior of creating MemTracker, modify the error message format in mem_limit_exceeded, extend and apply transfer_to, remove Metric in MemTracker, etc.; Modify where MemTracker is used: 1. MemPool adds a constructor to create a temporary tracker to avoid a lot of redundant code; 2. Added trackers for global objects such as ChunkAllocator and StorageEngine; 3. Added more fine-grained trackers such as ExprContext; 4. RuntimeState removes FragmentMemTracker, that is, PlanFragmentExecutor mem_tracker, which was previously used for independent statistical scan process memory, and replaces it with _scanner_mem_tracker in OlapScanNode; 5. MemTracker is no longer recorded in ReservationTracker, and ReservationTracker will be removed later;
91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include <atomic>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <vector>
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namespace doris {
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struct Chunk;
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class ChunkArena;
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class MetricEntity;
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class MemTracker;
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class Status;
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// Used to allocate memory with power-of-two length.
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// This Allocator allocate memory from system and cache free chunks for
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// later use.
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//
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// ChunkAllocator has one ChunkArena for each CPU core, it will try to allocate
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// memory from current core arena firstly. In this way, there will be no lock contention
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// between concurrently-running threads. If this fails, ChunkAllocator will try to allocate
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// memory from other core's arena.
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//
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// Memory Reservation
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// ChunkAllocator has a limit about how much free chunk bytes it can reserve, above which
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// chunk will released to system memory. For the worst case, when the limits is 0, it will
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// act as allocating directly from system.
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//
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// ChunkArena will keep a separate free list for each chunk size. In common case, chunk will
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// be allocated from current core arena. In this case, there is no lock contention.
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//
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// Must call CpuInfo::init() and DorisMetrics::instance()->initialize() to achieve good performance
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// before first object is created. And call init_instance() before use instance is called.
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class ChunkAllocator {
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public:
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static void init_instance(size_t reserve_limit);
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#ifdef BE_TEST
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static ChunkAllocator* instance();
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#else
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static ChunkAllocator* instance() { return _s_instance; }
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#endif
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ChunkAllocator(size_t reserve_limit);
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// Allocate a Chunk with a power-of-two length "size".
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// Return true if success and allocated chunk is saved in "chunk".
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// Otherwise return false.
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Status allocate(size_t size, Chunk* chunk, MemTracker* tracker = nullptr,
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bool check_limits = false);
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Status allocate_align(size_t size, Chunk* chunk, MemTracker* tracker = nullptr,
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bool check_limits = false);
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// Free chunk allocated from this allocator
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void free(const Chunk& chunk, MemTracker* tracker = nullptr);
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private:
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static ChunkAllocator* _s_instance;
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size_t _reserve_bytes_limit;
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std::atomic<int64_t> _reserved_bytes;
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// each core has a ChunkArena
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std::vector<std::unique_ptr<ChunkArena>> _arenas;
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std::shared_ptr<MetricEntity> _chunk_allocator_metric_entity;
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std::shared_ptr<MemTracker> _mem_tracker;
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};
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} // namespace doris
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