Revision 3e9c5a35237d0ae5d1d8b0499b4dd8844e0ec56d authored by haoyuhuang on 12 July 2019, 23:52:15 UTC, committed by Facebook Github Bot on 12 July 2019, 23:55:34 UTC
Summary: This PR provides more command line options for block cache analyzer to better understand block cache access pattern. -analyze_bottom_k_access_count_blocks -analyze_top_k_access_count_blocks -reuse_lifetime_labels -reuse_lifetime_buckets -analyze_callers -access_count_buckets -analyze_blocks_reuse_k_reuse_window Pull Request resolved: https://github.com/facebook/rocksdb/pull/5516 Test Plan: make clean && COMPILE_WITH_ASAN=1 make check -j32 Differential Revision: D16037440 Pulled By: HaoyuHuang fbshipit-source-id: b9a4ac0d4712053fab910732077a4d4b91400bc8
1 parent 1a59b6e
jemalloc_nodump_allocator.h
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include <atomic>
#include <vector>
#include "port/jemalloc_helper.h"
#include "port/port.h"
#include "rocksdb/memory_allocator.h"
#include "util/core_local.h"
#include "util/thread_local.h"
#if defined(ROCKSDB_JEMALLOC) && defined(ROCKSDB_PLATFORM_POSIX)
#include <sys/mman.h>
#if (JEMALLOC_VERSION_MAJOR >= 5) && defined(MADV_DONTDUMP)
#define ROCKSDB_JEMALLOC_NODUMP_ALLOCATOR
namespace rocksdb {
class JemallocNodumpAllocator : public MemoryAllocator {
public:
JemallocNodumpAllocator(JemallocAllocatorOptions& options,
std::unique_ptr<extent_hooks_t>&& arena_hooks,
unsigned arena_index);
~JemallocNodumpAllocator();
const char* Name() const override { return "JemallocNodumpAllocator"; }
void* Allocate(size_t size) override;
void Deallocate(void* p) override;
size_t UsableSize(void* p, size_t allocation_size) const override;
private:
friend Status NewJemallocNodumpAllocator(
JemallocAllocatorOptions& options,
std::shared_ptr<MemoryAllocator>* memory_allocator);
// Custom alloc hook to replace jemalloc default alloc.
static void* Alloc(extent_hooks_t* extent, void* new_addr, size_t size,
size_t alignment, bool* zero, bool* commit,
unsigned arena_ind);
// Destroy arena on destruction of the allocator, or on failure.
static Status DestroyArena(unsigned arena_index);
// Destroy tcache on destruction of the allocator, or thread exit.
static void DestroyThreadSpecificCache(void* ptr);
// Get or create tcache. Return flag suitable to use with `mallocx`:
// either MALLOCX_TCACHE_NONE or MALLOCX_TCACHE(tc).
int GetThreadSpecificCache(size_t size);
// A function pointer to jemalloc default alloc. Use atomic to make sure
// NewJemallocNodumpAllocator is thread-safe.
//
// Hack: original_alloc_ needs to be static for Alloc() to access it.
// alloc needs to be static to pass to jemalloc as function pointer.
static std::atomic<extent_alloc_t*> original_alloc_;
const JemallocAllocatorOptions options_;
// Custom hooks has to outlive corresponding arena.
const std::unique_ptr<extent_hooks_t> arena_hooks_;
// Arena index.
const unsigned arena_index_;
// Hold thread-local tcache index.
ThreadLocalPtr tcache_;
};
} // namespace rocksdb
#endif // (JEMALLOC_VERSION_MAJOR >= 5) && MADV_DONTDUMP
#endif // ROCKSDB_JEMALLOC && ROCKSDB_PLATFORM_POSIX
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