add cache bench
Summary: 1. A benchmark for cache Test Plan: ./cache_bench Reviewers: yhchiang, dhruba, sdong, igor, ljin Reviewed By: ljin Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D22809
This commit is contained in:
Feng Zhu
parent
9f1c80b556
commit
40ddc3d6c4
5
Makefile
5
Makefile
@ -132,7 +132,7 @@ TOOLS = \
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options_test \
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blob_store_bench
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PROGRAMS = db_bench signal_test table_reader_bench log_and_apply_bench $(TOOLS)
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PROGRAMS = db_bench signal_test table_reader_bench log_and_apply_bench cache_bench $(TOOLS)
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# The library name is configurable since we are maintaining libraries of both
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# debug/release mode.
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@ -264,6 +264,9 @@ $(LIBRARY): $(LIBOBJECTS)
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db_bench: db/db_bench.o $(LIBOBJECTS) $(TESTUTIL)
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$(CXX) db/db_bench.o $(LIBOBJECTS) $(TESTUTIL) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
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cache_bench: util/cache_bench.o $(LIBOBJECTS) $(TESTUTIL)
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$(CXX) util/cache_bench.o $(LIBOBJECTS) $(TESTUTIL) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
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block_hash_index_test: table/block_hash_index_test.o $(LIBOBJECTS) $(TESTHARNESS)
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$(CXX) table/block_hash_index_test.o $(LIBOBJECTS) $(TESTHARNESS) $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
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257
util/cache_bench.cc
Normal file
257
util/cache_bench.cc
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@ -0,0 +1,257 @@
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// Copyright (c) 2014, 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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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#ifndef GFLAGS
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#include <cstdio>
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int main() {
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fprintf(stderr, "Please install gflags to run rocksdb tools\n");
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return 1;
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}
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#else
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#include <sys/types.h>
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#include <stdio.h>
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#include <gflags/gflags.h>
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#include "rocksdb/db.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/env.h"
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#include "port/port.h"
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#include "util/mutexlock.h"
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#include "util/random.h"
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using GFLAGS::ParseCommandLineFlags;
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static const uint32_t KB = 1024;
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DEFINE_int32(threads, 10, "Number of concurrent threads to run.");
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DEFINE_int64(cache_size, 2 * KB * KB * KB,
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"Number of bytes to use as a cache of uncompressed data.");
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DEFINE_int32(num_shard_bits, 4, "shard_bits.");
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DEFINE_int64(max_key, 1 * KB* KB, "Max number of key to place in cache");
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DEFINE_uint64(ops_per_thread, 1200000, "Number of operations per thread.");
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DEFINE_int32(insert_percent, 40,
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"Ratio of insert to total workload (expressed as a percentage)");
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DEFINE_int32(lookup_percent, 50,
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"Ratio of lookup to total workload (expressed as a percentage)");
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DEFINE_int32(erase_percent, 10,
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"Ratio of erase to total workload (expressed as a percentage)");
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namespace rocksdb {
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class CacheBench;
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namespace {
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void deleter(const Slice& key, void* value) {
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delete reinterpret_cast<char *>(value);
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}
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// State shared by all concurrent executions of the same benchmark.
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class SharedState {
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public:
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explicit SharedState(CacheBench* cache_bench)
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: cv_(&mu_),
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num_threads_(FLAGS_threads),
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num_initialized_(0),
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start_(false),
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num_done_(0),
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cache_bench_(cache_bench) {
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}
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~SharedState() {}
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port::Mutex* GetMutex() {
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return &mu_;
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}
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port::CondVar* GetCondVar() {
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return &cv_;
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}
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CacheBench* GetCacheBench() const {
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return cache_bench_;
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}
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void IncInitialized() {
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num_initialized_++;
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}
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void IncDone() {
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num_done_++;
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}
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bool AllInitialized() const {
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return num_initialized_ >= num_threads_;
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}
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bool AllDone() const {
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return num_done_ >= num_threads_;
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}
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void SetStart() {
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start_ = true;
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}
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bool Started() const {
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return start_;
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}
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private:
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port::Mutex mu_;
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port::CondVar cv_;
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const uint64_t num_threads_;
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uint64_t num_initialized_;
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bool start_;
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uint64_t num_done_;
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CacheBench* cache_bench_;
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};
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// Per-thread state for concurrent executions of the same benchmark.
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struct ThreadState {
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uint32_t tid;
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Random rnd;
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SharedState* shared;
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ThreadState(uint32_t index, SharedState *shared)
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: tid(index),
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rnd(1000 + index),
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shared(shared) {}
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};
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} // namespace
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class CacheBench {
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public:
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CacheBench() :
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cache_(NewLRUCache(FLAGS_cache_size, FLAGS_num_shard_bits)),
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num_threads_(FLAGS_threads) {}
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~CacheBench() {}
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bool Run() {
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rocksdb::Env* env = rocksdb::Env::Default();
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PrintEnv();
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SharedState shared(this);
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std::vector<ThreadState*> threads(num_threads_);
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for (uint32_t i = 0; i < num_threads_; i++) {
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threads[i] = new ThreadState(i, &shared);
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env->StartThread(ThreadBody, threads[i]);
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}
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{
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MutexLock l(shared.GetMutex());
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while (!shared.AllInitialized()) {
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shared.GetCondVar()->Wait();
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}
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// Record start time
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uint64_t start_time = env->NowMicros();
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// Start all threads
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shared.SetStart();
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shared.GetCondVar()->SignalAll();
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// Wait threads to complete
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while (!shared.AllDone()) {
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shared.GetCondVar()->Wait();
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}
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// Record end time
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uint64_t end_time = env->NowMicros();
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fprintf(stdout, "Complete in %" PRIu64 "ms\n", end_time - start_time);
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}
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return true;
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}
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private:
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std::shared_ptr<Cache> cache_;
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uint32_t num_threads_;
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static void ThreadBody(void* v) {
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ThreadState* thread = reinterpret_cast<ThreadState*>(v);
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SharedState* shared = thread->shared;
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{
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MutexLock l(shared->GetMutex());
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shared->IncInitialized();
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if (shared->AllInitialized()) {
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shared->GetCondVar()->SignalAll();
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}
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while (!shared->Started()) {
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shared->GetCondVar()->Wait();
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}
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}
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thread->shared->GetCacheBench()->OperateCache(thread);
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{
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MutexLock l(shared->GetMutex());
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shared->IncDone();
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if (shared->AllDone()) {
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shared->GetCondVar()->SignalAll();
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}
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}
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}
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void OperateCache(ThreadState* thread) {
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for (uint64_t i = 0; i < FLAGS_ops_per_thread; i++) {
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uint64_t rand_key = thread->rnd.Next() % FLAGS_max_key;
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// Cast uint64* to be char*, data would be copied to cache
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Slice key(reinterpret_cast<char*>(&rand_key), 8);
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int32_t prob_op = thread->rnd.Uniform(100);
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if (prob_op >= 0 && prob_op < FLAGS_insert_percent) {
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// do insert
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auto handle = cache_->Insert(key, new char[10], 1, &deleter);
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cache_->Release(handle);
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} else if (prob_op -= FLAGS_insert_percent &&
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prob_op < FLAGS_lookup_percent) {
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// do lookup
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auto handle = cache_->Lookup(key);
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if (handle) {
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cache_->Release(handle);
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}
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} else if (prob_op -= FLAGS_lookup_percent &&
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prob_op < FLAGS_erase_percent) {
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// do erase
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cache_->Erase(key);
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}
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}
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}
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void PrintEnv() const {
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printf("RocksDB version : %d.%d\n", kMajorVersion, kMinorVersion);
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printf("Number of threads : %d\n", FLAGS_threads);
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printf("Ops per thread : %" PRIu64 "\n", FLAGS_ops_per_thread);
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printf("Cache size : %" PRIu64 "\n", FLAGS_cache_size);
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printf("Num shard bits : %d\n", FLAGS_num_shard_bits);
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printf("Max key : %" PRIu64 "\n", FLAGS_max_key);
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printf("Insert percentage : %d%%\n", FLAGS_insert_percent);
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printf("Lookup percentage : %d%%\n", FLAGS_lookup_percent);
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printf("Erase percentage : %d%%\n", FLAGS_erase_percent);
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printf("----------------------------\n");
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}
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};
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} // namespace rocksdb
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int main(int argc, char** argv) {
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ParseCommandLineFlags(&argc, &argv, true);
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if (FLAGS_threads <= 0) {
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fprintf(stderr, "threads number <= 0\n");
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exit(1);
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}
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rocksdb::CacheBench bench;
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if (bench.Run()) {
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return 0;
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} else {
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return 1;
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}
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}
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#endif // GFLAGS
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