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rocksdb/util/cache_bench.cc

284 lines
7.4 KiB

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#ifndef GFLAGS
#include <cstdio>
int main() {
fprintf(stderr, "Please install gflags to run rocksdb tools\n");
return 1;
}
#else
#include <inttypes.h>
#include <sys/types.h>
#include <stdio.h>
#include <gflags/gflags.h>
#include "rocksdb/db.h"
#include "rocksdb/cache.h"
#include "rocksdb/env.h"
#include "port/port.h"
#include "util/mutexlock.h"
#include "util/random.h"
using GFLAGS::ParseCommandLineFlags;
static const uint32_t KB = 1024;
DEFINE_int32(threads, 16, "Number of concurrent threads to run.");
DEFINE_int64(cache_size, 8 * KB * KB,
"Number of bytes to use as a cache of uncompressed data.");
DEFINE_int32(num_shard_bits, 4, "shard_bits.");
DEFINE_int64(max_key, 1 * KB * KB * KB, "Max number of key to place in cache");
DEFINE_uint64(ops_per_thread, 1200000, "Number of operations per thread.");
DEFINE_bool(populate_cache, false, "Populate cache before operations");
DEFINE_int32(insert_percent, 40,
"Ratio of insert to total workload (expressed as a percentage)");
DEFINE_int32(lookup_percent, 50,
"Ratio of lookup to total workload (expressed as a percentage)");
DEFINE_int32(erase_percent, 10,
"Ratio of erase to total workload (expressed as a percentage)");
DEFINE_bool(use_clock_cache, false, "");
namespace rocksdb {
class CacheBench;
namespace {
void deleter(const Slice& key, void* value) {
delete reinterpret_cast<char *>(value);
}
// State shared by all concurrent executions of the same benchmark.
class SharedState {
public:
explicit SharedState(CacheBench* cache_bench)
: cv_(&mu_),
num_threads_(FLAGS_threads),
num_initialized_(0),
start_(false),
num_done_(0),
cache_bench_(cache_bench) {
}
~SharedState() {}
port::Mutex* GetMutex() {
return &mu_;
}
port::CondVar* GetCondVar() {
return &cv_;
}
CacheBench* GetCacheBench() const {
return cache_bench_;
}
void IncInitialized() {
num_initialized_++;
}
void IncDone() {
num_done_++;
}
bool AllInitialized() const {
return num_initialized_ >= num_threads_;
}
bool AllDone() const {
return num_done_ >= num_threads_;
}
void SetStart() {
start_ = true;
}
bool Started() const {
return start_;
}
private:
port::Mutex mu_;
port::CondVar cv_;
const uint64_t num_threads_;
uint64_t num_initialized_;
bool start_;
uint64_t num_done_;
CacheBench* cache_bench_;
};
// Per-thread state for concurrent executions of the same benchmark.
struct ThreadState {
uint32_t tid;
Random rnd;
SharedState* shared;
ThreadState(uint32_t index, SharedState* _shared)
: tid(index), rnd(1000 + index), shared(_shared) {}
};
} // namespace
class CacheBench {
public:
CacheBench() : num_threads_(FLAGS_threads) {
if (FLAGS_use_clock_cache) {
cache_ = NewClockCache(FLAGS_cache_size, FLAGS_num_shard_bits);
if (!cache_) {
fprintf(stderr, "Clock cache not supported.\n");
exit(1);
}
} else {
cache_ = NewLRUCache(FLAGS_cache_size, FLAGS_num_shard_bits);
}
}
~CacheBench() {}
void PopulateCache() {
Random rnd(1);
for (int64_t i = 0; i < FLAGS_cache_size; i++) {
uint64_t rand_key = rnd.Next() % FLAGS_max_key;
// Cast uint64* to be char*, data would be copied to cache
Slice key(reinterpret_cast<char*>(&rand_key), 8);
// do insert
cache_->Insert(key, new char[10], 1, &deleter);
}
}
bool Run() {
rocksdb::Env* env = rocksdb::Env::Default();
PrintEnv();
SharedState shared(this);
std::vector<ThreadState*> threads(num_threads_);
for (uint32_t i = 0; i < num_threads_; i++) {
threads[i] = new ThreadState(i, &shared);
env->StartThread(ThreadBody, threads[i]);
}
{
MutexLock l(shared.GetMutex());
while (!shared.AllInitialized()) {
shared.GetCondVar()->Wait();
}
// Record start time
uint64_t start_time = env->NowMicros();
// Start all threads
shared.SetStart();
shared.GetCondVar()->SignalAll();
// Wait threads to complete
while (!shared.AllDone()) {
shared.GetCondVar()->Wait();
}
// Record end time
uint64_t end_time = env->NowMicros();
double elapsed = static_cast<double>(end_time - start_time) * 1e-6;
uint32_t qps = static_cast<uint32_t>(
static_cast<double>(FLAGS_threads * FLAGS_ops_per_thread) / elapsed);
fprintf(stdout, "Complete in %.3f s; QPS = %u\n", elapsed, qps);
}
return true;
}
private:
std::shared_ptr<Cache> cache_;
uint32_t num_threads_;
static void ThreadBody(void* v) {
ThreadState* thread = reinterpret_cast<ThreadState*>(v);
SharedState* shared = thread->shared;
{
MutexLock l(shared->GetMutex());
shared->IncInitialized();
if (shared->AllInitialized()) {
shared->GetCondVar()->SignalAll();
}
while (!shared->Started()) {
shared->GetCondVar()->Wait();
}
}
thread->shared->GetCacheBench()->OperateCache(thread);
{
MutexLock l(shared->GetMutex());
shared->IncDone();
if (shared->AllDone()) {
shared->GetCondVar()->SignalAll();
}
}
}
void OperateCache(ThreadState* thread) {
for (uint64_t i = 0; i < FLAGS_ops_per_thread; i++) {
uint64_t rand_key = thread->rnd.Next() % FLAGS_max_key;
// Cast uint64* to be char*, data would be copied to cache
Slice key(reinterpret_cast<char*>(&rand_key), 8);
int32_t prob_op = thread->rnd.Uniform(100);
if (prob_op >= 0 && prob_op < FLAGS_insert_percent) {
// do insert
cache_->Insert(key, new char[10], 1, &deleter);
} else if (prob_op -= FLAGS_insert_percent &&
prob_op < FLAGS_lookup_percent) {
// do lookup
auto handle = cache_->Lookup(key);
if (handle) {
cache_->Release(handle);
}
} else if (prob_op -= FLAGS_lookup_percent &&
prob_op < FLAGS_erase_percent) {
// do erase
cache_->Erase(key);
}
}
}
void PrintEnv() const {
printf("RocksDB version : %d.%d\n", kMajorVersion, kMinorVersion);
printf("Number of threads : %d\n", FLAGS_threads);
printf("Ops per thread : %" PRIu64 "\n", FLAGS_ops_per_thread);
printf("Cache size : %" PRIu64 "\n", FLAGS_cache_size);
printf("Num shard bits : %d\n", FLAGS_num_shard_bits);
printf("Max key : %" PRIu64 "\n", FLAGS_max_key);
printf("Populate cache : %d\n", FLAGS_populate_cache);
printf("Insert percentage : %d%%\n", FLAGS_insert_percent);
printf("Lookup percentage : %d%%\n", FLAGS_lookup_percent);
printf("Erase percentage : %d%%\n", FLAGS_erase_percent);
printf("----------------------------\n");
}
};
} // namespace rocksdb
int main(int argc, char** argv) {
ParseCommandLineFlags(&argc, &argv, true);
if (FLAGS_threads <= 0) {
fprintf(stderr, "threads number <= 0\n");
exit(1);
}
rocksdb::CacheBench bench;
if (FLAGS_populate_cache) {
bench.PopulateCache();
}
if (bench.Run()) {
return 0;
} else {
return 1;
}
}
#endif // GFLAGS