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diff --git a/db/db_bench.cc b/db/db_bench.cc
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-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#include <sys/types.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "db/db_impl.h"
-#include "db/version_set.h"
-#include "leveldb/cache.h"
-#include "leveldb/db.h"
-#include "leveldb/env.h"
-#include "leveldb/write_batch.h"
-#include "port/port.h"
-#include "util/crc32c.h"
-#include "util/histogram.h"
-#include "util/mutexlock.h"
-#include "util/random.h"
-#include "util/testutil.h"
-
-// Comma-separated list of operations to run in the specified order
-// Actual benchmarks:
-// fillseq -- write N values in sequential key order in async mode
-// fillrandom -- write N values in random key order in async mode
-// overwrite -- overwrite N values in random key order in async mode
-// fillsync -- write N/100 values in random key order in sync mode
-// fill100K -- write N/1000 100K values in random order in async mode
-// deleteseq -- delete N keys in sequential order
-// deleterandom -- delete N keys in random order
-// readseq -- read N times sequentially
-// readreverse -- read N times in reverse order
-// readrandom -- read N times in random order
-// readmissing -- read N missing keys in random order
-// readhot -- read N times in random order from 1% section of DB
-// seekrandom -- N random seeks
-// open -- cost of opening a DB
-// crc32c -- repeated crc32c of 4K of data
-// acquireload -- load N*1000 times
-// Meta operations:
-// compact -- Compact the entire DB
-// stats -- Print DB stats
-// sstables -- Print sstable info
-// heapprofile -- Dump a heap profile (if supported by this port)
-static const char* FLAGS_benchmarks =
- "fillseq,"
- "fillsync,"
- "fillrandom,"
- "overwrite,"
- "readrandom,"
- "readrandom," // Extra run to allow previous compactions to quiesce
- "readseq,"
- "readreverse,"
- "compact,"
- "readrandom,"
- "readseq,"
- "readreverse,"
- "fill100K,"
- "crc32c,"
- "snappycomp,"
- "snappyuncomp,"
- "acquireload,"
- ;
-
-// Number of key/values to place in database
-static int FLAGS_num = 1000000;
-
-// Number of read operations to do. If negative, do FLAGS_num reads.
-static int FLAGS_reads = -1;
-
-// Number of concurrent threads to run.
-static int FLAGS_threads = 1;
-
-// Size of each value
-static int FLAGS_value_size = 100;
-
-// Arrange to generate values that shrink to this fraction of
-// their original size after compression
-static double FLAGS_compression_ratio = 0.5;
-
-// Print histogram of operation timings
-static bool FLAGS_histogram = false;
-
-// Number of bytes to buffer in memtable before compacting
-// (initialized to default value by "main")
-static int FLAGS_write_buffer_size = 0;
-
-// Number of bytes to use as a cache of uncompressed data.
-// Negative means use default settings.
-static int FLAGS_cache_size = -1;
-
-// Maximum number of files to keep open at the same time (use default if == 0)
-static int FLAGS_open_files = 0;
-
-// Bloom filter bits per key.
-// Negative means use default settings.
-static int FLAGS_bloom_bits = -1;
-
-// If true, do not destroy the existing database. If you set this
-// flag and also specify a benchmark that wants a fresh database, that
-// benchmark will fail.
-static bool FLAGS_use_existing_db = false;
-
-// Use the db with the following name.
-static const char* FLAGS_db = NULL;
-
-namespace leveldb {
-
-namespace {
-
-// Helper for quickly generating random data.
-class RandomGenerator {
- private:
- std::string data_;
- int pos_;
-
- public:
- RandomGenerator() {
- // We use a limited amount of data over and over again and ensure
- // that it is larger than the compression window (32KB), and also
- // large enough to serve all typical value sizes we want to write.
- Random rnd(301);
- std::string piece;
- while (data_.size() < 1048576) {
- // Add a short fragment that is as compressible as specified
- // by FLAGS_compression_ratio.
- test::CompressibleString(&rnd, FLAGS_compression_ratio, 100, &piece);
- data_.append(piece);
- }
- pos_ = 0;
- }
-
- Slice Generate(size_t len) {
- if (pos_ + len > data_.size()) {
- pos_ = 0;
- assert(len < data_.size());
- }
- pos_ += len;
- return Slice(data_.data() + pos_ - len, len);
- }
-};
-
-static Slice TrimSpace(Slice s) {
- size_t start = 0;
- while (start < s.size() && isspace(s[start])) {
- start++;
- }
- size_t limit = s.size();
- while (limit > start && isspace(s[limit-1])) {
- limit--;
- }
- return Slice(s.data() + start, limit - start);
-}
-
-static void AppendWithSpace(std::string* str, Slice msg) {
- if (msg.empty()) return;
- if (!str->empty()) {
- str->push_back(' ');
- }
- str->append(msg.data(), msg.size());
-}
-
-class Stats {
- private:
- double start_;
- double finish_;
- double seconds_;
- int done_;
- int next_report_;
- int64_t bytes_;
- double last_op_finish_;
- Histogram hist_;
- std::string message_;
-
- public:
- Stats() { Start(); }
-
- void Start() {
- next_report_ = 100;
- last_op_finish_ = start_;
- hist_.Clear();
- done_ = 0;
- bytes_ = 0;
- seconds_ = 0;
- start_ = Env::Default()->NowMicros();
- finish_ = start_;
- message_.clear();
- }
-
- void Merge(const Stats& other) {
- hist_.Merge(other.hist_);
- done_ += other.done_;
- bytes_ += other.bytes_;
- seconds_ += other.seconds_;
- if (other.start_ < start_) start_ = other.start_;
- if (other.finish_ > finish_) finish_ = other.finish_;
-
- // Just keep the messages from one thread
- if (message_.empty()) message_ = other.message_;
- }
-
- void Stop() {
- finish_ = Env::Default()->NowMicros();
- seconds_ = (finish_ - start_) * 1e-6;
- }
-
- void AddMessage(Slice msg) {
- AppendWithSpace(&message_, msg);
- }
-
- void FinishedSingleOp() {
- if (FLAGS_histogram) {
- double now = Env::Default()->NowMicros();
- double micros = now - last_op_finish_;
- hist_.Add(micros);
- if (micros > 20000) {
- fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
- fflush(stderr);
- }
- last_op_finish_ = now;
- }
-
- done_++;
- if (done_ >= next_report_) {
- if (next_report_ < 1000) next_report_ += 100;
- else if (next_report_ < 5000) next_report_ += 500;
- else if (next_report_ < 10000) next_report_ += 1000;
- else if (next_report_ < 50000) next_report_ += 5000;
- else if (next_report_ < 100000) next_report_ += 10000;
- else if (next_report_ < 500000) next_report_ += 50000;
- else next_report_ += 100000;
- fprintf(stderr, "... finished %d ops%30s\r", done_, "");
- fflush(stderr);
- }
- }
-
- void AddBytes(int64_t n) {
- bytes_ += n;
- }
-
- void Report(const Slice& name) {
- // Pretend at least one op was done in case we are running a benchmark
- // that does not call FinishedSingleOp().
- if (done_ < 1) done_ = 1;
-
- std::string extra;
- if (bytes_ > 0) {
- // Rate is computed on actual elapsed time, not the sum of per-thread
- // elapsed times.
- double elapsed = (finish_ - start_) * 1e-6;
- char rate[100];
- snprintf(rate, sizeof(rate), "%6.1f MB/s",
- (bytes_ / 1048576.0) / elapsed);
- extra = rate;
- }
- AppendWithSpace(&extra, message_);
-
- fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
- name.ToString().c_str(),
- seconds_ * 1e6 / done_,
- (extra.empty() ? "" : " "),
- extra.c_str());
- if (FLAGS_histogram) {
- fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
- }
- fflush(stdout);
- }
-};
-
-// State shared by all concurrent executions of the same benchmark.
-struct SharedState {
- port::Mutex mu;
- port::CondVar cv;
- int total;
-
- // Each thread goes through the following states:
- // (1) initializing
- // (2) waiting for others to be initialized
- // (3) running
- // (4) done
-
- int num_initialized;
- int num_done;
- bool start;
-
- SharedState() : cv(&mu) { }
-};
-
-// Per-thread state for concurrent executions of the same benchmark.
-struct ThreadState {
- int tid; // 0..n-1 when running in n threads
- Random rand; // Has different seeds for different threads
- Stats stats;
- SharedState* shared;
-
- ThreadState(int index)
- : tid(index),
- rand(1000 + index) {
- }
-};
-
-} // namespace
-
-class Benchmark {
- private:
- Cache* cache_;
- const FilterPolicy* filter_policy_;
- DB* db_;
- int num_;
- int value_size_;
- int entries_per_batch_;
- WriteOptions write_options_;
- int reads_;
- int heap_counter_;
-
- void PrintHeader() {
- const int kKeySize = 16;
- PrintEnvironment();
- fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
- fprintf(stdout, "Values: %d bytes each (%d bytes after compression)\n",
- FLAGS_value_size,
- static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
- fprintf(stdout, "Entries: %d\n", num_);
- fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
- ((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_)
- / 1048576.0));
- fprintf(stdout, "FileSize: %.1f MB (estimated)\n",
- (((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_)
- / 1048576.0));
- PrintWarnings();
- fprintf(stdout, "------------------------------------------------\n");
- }
-
- void PrintWarnings() {
-#if defined(__GNUC__) && !defined(__OPTIMIZE__)
- fprintf(stdout,
- "WARNING: Optimization is disabled: benchmarks unnecessarily slow\n"
- );
-#endif
-#ifndef NDEBUG
- fprintf(stdout,
- "WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
-#endif
-
- // See if snappy is working by attempting to compress a compressible string
- const char text[] = "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
- std::string compressed;
- if (!port::Snappy_Compress(text, sizeof(text), &compressed)) {
- fprintf(stdout, "WARNING: Snappy compression is not enabled\n");
- } else if (compressed.size() >= sizeof(text)) {
- fprintf(stdout, "WARNING: Snappy compression is not effective\n");
- }
- }
-
- void PrintEnvironment() {
- fprintf(stderr, "LevelDB: version %d.%d\n",
- kMajorVersion, kMinorVersion);
-
-#if defined(__linux)
- time_t now = time(NULL);
- fprintf(stderr, "Date: %s", ctime(&now)); // ctime() adds newline
-
- FILE* cpuinfo = fopen("/proc/cpuinfo", "r");
- if (cpuinfo != NULL) {
- char line[1000];
- int num_cpus = 0;
- std::string cpu_type;
- std::string cache_size;
- while (fgets(line, sizeof(line), cpuinfo) != NULL) {
- const char* sep = strchr(line, ':');
- if (sep == NULL) {
- continue;
- }
- Slice key = TrimSpace(Slice(line, sep - 1 - line));
- Slice val = TrimSpace(Slice(sep + 1));
- if (key == "model name") {
- ++num_cpus;
- cpu_type = val.ToString();
- } else if (key == "cache size") {
- cache_size = val.ToString();
- }
- }
- fclose(cpuinfo);
- fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
- fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
- }
-#endif
- }
-
- public:
- Benchmark()
- : cache_(FLAGS_cache_size >= 0 ? NewLRUCache(FLAGS_cache_size) : NULL),
- filter_policy_(FLAGS_bloom_bits >= 0
- ? NewBloomFilterPolicy(FLAGS_bloom_bits)
- : NULL),
- db_(NULL),
- num_(FLAGS_num),
- value_size_(FLAGS_value_size),
- entries_per_batch_(1),
- reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
- heap_counter_(0) {
- std::vector<std::string> files;
- Env::Default()->GetChildren(FLAGS_db, &files);
- for (size_t i = 0; i < files.size(); i++) {
- if (Slice(files[i]).starts_with("heap-")) {
- Env::Default()->DeleteFile(std::string(FLAGS_db) + "/" + files[i]);
- }
- }
- if (!FLAGS_use_existing_db) {
- DestroyDB(FLAGS_db, Options());
- }
- }
-
- ~Benchmark() {
- delete db_;
- delete cache_;
- delete filter_policy_;
- }
-
- void Run() {
- PrintHeader();
- Open();
-
- const char* benchmarks = FLAGS_benchmarks;
- while (benchmarks != NULL) {
- const char* sep = strchr(benchmarks, ',');
- Slice name;
- if (sep == NULL) {
- name = benchmarks;
- benchmarks = NULL;
- } else {
- name = Slice(benchmarks, sep - benchmarks);
- benchmarks = sep + 1;
- }
-
- // Reset parameters that may be overridden below
- num_ = FLAGS_num;
- reads_ = (FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads);
- value_size_ = FLAGS_value_size;
- entries_per_batch_ = 1;
- write_options_ = WriteOptions();
-
- void (Benchmark::*method)(ThreadState*) = NULL;
- bool fresh_db = false;
- int num_threads = FLAGS_threads;
-
- if (name == Slice("open")) {
- method = &Benchmark::OpenBench;
- num_ /= 10000;
- if (num_ < 1) num_ = 1;
- } else if (name == Slice("fillseq")) {
- fresh_db = true;
- method = &Benchmark::WriteSeq;
- } else if (name == Slice("fillbatch")) {
- fresh_db = true;
- entries_per_batch_ = 1000;
- method = &Benchmark::WriteSeq;
- } else if (name == Slice("fillrandom")) {
- fresh_db = true;
- method = &Benchmark::WriteRandom;
- } else if (name == Slice("overwrite")) {
- fresh_db = false;
- method = &Benchmark::WriteRandom;
- } else if (name == Slice("fillsync")) {
- fresh_db = true;
- num_ /= 1000;
- write_options_.sync = true;
- method = &Benchmark::WriteRandom;
- } else if (name == Slice("fill100K")) {
- fresh_db = true;
- num_ /= 1000;
- value_size_ = 100 * 1000;
- method = &Benchmark::WriteRandom;
- } else if (name == Slice("readseq")) {
- method = &Benchmark::ReadSequential;
- } else if (name == Slice("readreverse")) {
- method = &Benchmark::ReadReverse;
- } else if (name == Slice("readrandom")) {
- method = &Benchmark::ReadRandom;
- } else if (name == Slice("readmissing")) {
- method = &Benchmark::ReadMissing;
- } else if (name == Slice("seekrandom")) {
- method = &Benchmark::SeekRandom;
- } else if (name == Slice("readhot")) {
- method = &Benchmark::ReadHot;
- } else if (name == Slice("readrandomsmall")) {
- reads_ /= 1000;
- method = &Benchmark::ReadRandom;
- } else if (name == Slice("deleteseq")) {
- method = &Benchmark::DeleteSeq;
- } else if (name == Slice("deleterandom")) {
- method = &Benchmark::DeleteRandom;
- } else if (name == Slice("readwhilewriting")) {
- num_threads++; // Add extra thread for writing
- method = &Benchmark::ReadWhileWriting;
- } else if (name == Slice("compact")) {
- method = &Benchmark::Compact;
- } else if (name == Slice("crc32c")) {
- method = &Benchmark::Crc32c;
- } else if (name == Slice("acquireload")) {
- method = &Benchmark::AcquireLoad;
- } else if (name == Slice("snappycomp")) {
- method = &Benchmark::SnappyCompress;
- } else if (name == Slice("snappyuncomp")) {
- method = &Benchmark::SnappyUncompress;
- } else if (name == Slice("heapprofile")) {
- HeapProfile();
- } else if (name == Slice("stats")) {
- PrintStats("leveldb.stats");
- } else if (name == Slice("sstables")) {
- PrintStats("leveldb.sstables");
- } else {
- if (name != Slice()) { // No error message for empty name
- fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
- }
- }
-
- if (fresh_db) {
- if (FLAGS_use_existing_db) {
- fprintf(stdout, "%-12s : skipped (--use_existing_db is true)\n",
- name.ToString().c_str());
- method = NULL;
- } else {
- delete db_;
- db_ = NULL;
- DestroyDB(FLAGS_db, Options());
- Open();
- }
- }
-
- if (method != NULL) {
- RunBenchmark(num_threads, name, method);
- }
- }
- }
-
- private:
- struct ThreadArg {
- Benchmark* bm;
- SharedState* shared;
- ThreadState* thread;
- void (Benchmark::*method)(ThreadState*);
- };
-
- static void ThreadBody(void* v) {
- ThreadArg* arg = reinterpret_cast<ThreadArg*>(v);
- SharedState* shared = arg->shared;
- ThreadState* thread = arg->thread;
- {
- MutexLock l(&shared->mu);
- shared->num_initialized++;
- if (shared->num_initialized >= shared->total) {
- shared->cv.SignalAll();
- }
- while (!shared->start) {
- shared->cv.Wait();
- }
- }
-
- thread->stats.Start();
- (arg->bm->*(arg->method))(thread);
- thread->stats.Stop();
-
- {
- MutexLock l(&shared->mu);
- shared->num_done++;
- if (shared->num_done >= shared->total) {
- shared->cv.SignalAll();
- }
- }
- }
-
- void RunBenchmark(int n, Slice name,
- void (Benchmark::*method)(ThreadState*)) {
- SharedState shared;
- shared.total = n;
- shared.num_initialized = 0;
- shared.num_done = 0;
- shared.start = false;
-
- ThreadArg* arg = new ThreadArg[n];
- for (int i = 0; i < n; i++) {
- arg[i].bm = this;
- arg[i].method = method;
- arg[i].shared = &shared;
- arg[i].thread = new ThreadState(i);
- arg[i].thread->shared = &shared;
- Env::Default()->StartThread(ThreadBody, &arg[i]);
- }
-
- shared.mu.Lock();
- while (shared.num_initialized < n) {
- shared.cv.Wait();
- }
-
- shared.start = true;
- shared.cv.SignalAll();
- while (shared.num_done < n) {
- shared.cv.Wait();
- }
- shared.mu.Unlock();
-
- for (int i = 1; i < n; i++) {
- arg[0].thread->stats.Merge(arg[i].thread->stats);
- }
- arg[0].thread->stats.Report(name);
-
- for (int i = 0; i < n; i++) {
- delete arg[i].thread;
- }
- delete[] arg;
- }
-
- void Crc32c(ThreadState* thread) {
- // Checksum about 500MB of data total
- const int size = 4096;
- const char* label = "(4K per op)";
- std::string data(size, 'x');
- int64_t bytes = 0;
- uint32_t crc = 0;
- while (bytes < 500 * 1048576) {
- crc = crc32c::Value(data.data(), size);
- thread->stats.FinishedSingleOp();
- bytes += size;
- }
- // Print so result is not dead
- fprintf(stderr, "... crc=0x%x\r", static_cast<unsigned int>(crc));
-
- thread->stats.AddBytes(bytes);
- thread->stats.AddMessage(label);
- }
-
- void AcquireLoad(ThreadState* thread) {
- int dummy;
- port::AtomicPointer ap(&dummy);
- int count = 0;
- void *ptr = NULL;
- thread->stats.AddMessage("(each op is 1000 loads)");
- while (count < 100000) {
- for (int i = 0; i < 1000; i++) {
- ptr = ap.Acquire_Load();
- }
- count++;
- thread->stats.FinishedSingleOp();
- }
- if (ptr == NULL) exit(1); // Disable unused variable warning.
- }
-
- void SnappyCompress(ThreadState* thread) {
- RandomGenerator gen;
- Slice input = gen.Generate(Options().block_size);
- int64_t bytes = 0;
- int64_t produced = 0;
- bool ok = true;
- std::string compressed;
- while (ok && bytes < 1024 * 1048576) { // Compress 1G
- ok = port::Snappy_Compress(input.data(), input.size(), &compressed);
- produced += compressed.size();
- bytes += input.size();
- thread->stats.FinishedSingleOp();
- }
-
- if (!ok) {
- thread->stats.AddMessage("(snappy failure)");
- } else {
- char buf[100];
- snprintf(buf, sizeof(buf), "(output: %.1f%%)",
- (produced * 100.0) / bytes);
- thread->stats.AddMessage(buf);
- thread->stats.AddBytes(bytes);
- }
- }
-
- void SnappyUncompress(ThreadState* thread) {
- RandomGenerator gen;
- Slice input = gen.Generate(Options().block_size);
- std::string compressed;
- bool ok = port::Snappy_Compress(input.data(), input.size(), &compressed);
- int64_t bytes = 0;
- char* uncompressed = new char[input.size()];
- while (ok && bytes < 1024 * 1048576) { // Compress 1G
- ok = port::Snappy_Uncompress(compressed.data(), compressed.size(),
- uncompressed);
- bytes += input.size();
- thread->stats.FinishedSingleOp();
- }
- delete[] uncompressed;
-
- if (!ok) {
- thread->stats.AddMessage("(snappy failure)");
- } else {
- thread->stats.AddBytes(bytes);
- }
- }
-
- void Open() {
- assert(db_ == NULL);
- Options options;
- options.create_if_missing = !FLAGS_use_existing_db;
- options.block_cache = cache_;
- options.write_buffer_size = FLAGS_write_buffer_size;
- options.max_open_files = FLAGS_open_files;
- options.filter_policy = filter_policy_;
- Status s = DB::Open(options, FLAGS_db, &db_);
- if (!s.ok()) {
- fprintf(stderr, "open error: %s\n", s.ToString().c_str());
- exit(1);
- }
- }
-
- void OpenBench(ThreadState* thread) {
- for (int i = 0; i < num_; i++) {
- delete db_;
- Open();
- thread->stats.FinishedSingleOp();
- }
- }
-
- void WriteSeq(ThreadState* thread) {
- DoWrite(thread, true);
- }
-
- void WriteRandom(ThreadState* thread) {
- DoWrite(thread, false);
- }
-
- void DoWrite(ThreadState* thread, bool seq) {
- if (num_ != FLAGS_num) {
- char msg[100];
- snprintf(msg, sizeof(msg), "(%d ops)", num_);
- thread->stats.AddMessage(msg);
- }
-
- RandomGenerator gen;
- WriteBatch batch;
- Status s;
- int64_t bytes = 0;
- for (int i = 0; i < num_; i += entries_per_batch_) {
- batch.Clear();
- for (int j = 0; j < entries_per_batch_; j++) {
- const int k = seq ? i+j : (thread->rand.Next() % FLAGS_num);
- char key[100];
- snprintf(key, sizeof(key), "%016d", k);
- batch.Put(key, gen.Generate(value_size_));
- bytes += value_size_ + strlen(key);
- thread->stats.FinishedSingleOp();
- }
- s = db_->Write(write_options_, &batch);
- if (!s.ok()) {
- fprintf(stderr, "put error: %s\n", s.ToString().c_str());
- exit(1);
- }
- }
- thread->stats.AddBytes(bytes);
- }
-
- void ReadSequential(ThreadState* thread) {
- Iterator* iter = db_->NewIterator(ReadOptions());
- int i = 0;
- int64_t bytes = 0;
- for (iter->SeekToFirst(); i < reads_ && iter->Valid(); iter->Next()) {
- bytes += iter->key().size() + iter->value().size();
- thread->stats.FinishedSingleOp();
- ++i;
- }
- delete iter;
- thread->stats.AddBytes(bytes);
- }
-
- void ReadReverse(ThreadState* thread) {
- Iterator* iter = db_->NewIterator(ReadOptions());
- int i = 0;
- int64_t bytes = 0;
- for (iter->SeekToLast(); i < reads_ && iter->Valid(); iter->Prev()) {
- bytes += iter->key().size() + iter->value().size();
- thread->stats.FinishedSingleOp();
- ++i;
- }
- delete iter;
- thread->stats.AddBytes(bytes);
- }
-
- void ReadRandom(ThreadState* thread) {
- ReadOptions options;
- std::string value;
- int found = 0;
- for (int i = 0; i < reads_; i++) {
- char key[100];
- const int k = thread->rand.Next() % FLAGS_num;
- snprintf(key, sizeof(key), "%016d", k);
- if (db_->Get(options, key, &value).ok()) {
- found++;
- }
- thread->stats.FinishedSingleOp();
- }
- char msg[100];
- snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
- thread->stats.AddMessage(msg);
- }
-
- void ReadMissing(ThreadState* thread) {
- ReadOptions options;
- std::string value;
- for (int i = 0; i < reads_; i++) {
- char key[100];
- const int k = thread->rand.Next() % FLAGS_num;
- snprintf(key, sizeof(key), "%016d.", k);
- db_->Get(options, key, &value);
- thread->stats.FinishedSingleOp();
- }
- }
-
- void ReadHot(ThreadState* thread) {
- ReadOptions options;
- std::string value;
- const int range = (FLAGS_num + 99) / 100;
- for (int i = 0; i < reads_; i++) {
- char key[100];
- const int k = thread->rand.Next() % range;
- snprintf(key, sizeof(key), "%016d", k);
- db_->Get(options, key, &value);
- thread->stats.FinishedSingleOp();
- }
- }
-
- void SeekRandom(ThreadState* thread) {
- ReadOptions options;
- int found = 0;
- for (int i = 0; i < reads_; i++) {
- Iterator* iter = db_->NewIterator(options);
- char key[100];
- const int k = thread->rand.Next() % FLAGS_num;
- snprintf(key, sizeof(key), "%016d", k);
- iter->Seek(key);
- if (iter->Valid() && iter->key() == key) found++;
- delete iter;
- thread->stats.FinishedSingleOp();
- }
- char msg[100];
- snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
- thread->stats.AddMessage(msg);
- }
-
- void DoDelete(ThreadState* thread, bool seq) {
- RandomGenerator gen;
- WriteBatch batch;
- Status s;
- for (int i = 0; i < num_; i += entries_per_batch_) {
- batch.Clear();
- for (int j = 0; j < entries_per_batch_; j++) {
- const int k = seq ? i+j : (thread->rand.Next() % FLAGS_num);
- char key[100];
- snprintf(key, sizeof(key), "%016d", k);
- batch.Delete(key);
- thread->stats.FinishedSingleOp();
- }
- s = db_->Write(write_options_, &batch);
- if (!s.ok()) {
- fprintf(stderr, "del error: %s\n", s.ToString().c_str());
- exit(1);
- }
- }
- }
-
- void DeleteSeq(ThreadState* thread) {
- DoDelete(thread, true);
- }
-
- void DeleteRandom(ThreadState* thread) {
- DoDelete(thread, false);
- }
-
- void ReadWhileWriting(ThreadState* thread) {
- if (thread->tid > 0) {
- ReadRandom(thread);
- } else {
- // Special thread that keeps writing until other threads are done.
- RandomGenerator gen;
- while (true) {
- {
- MutexLock l(&thread->shared->mu);
- if (thread->shared->num_done + 1 >= thread->shared->num_initialized) {
- // Other threads have finished
- break;
- }
- }
-
- const int k = thread->rand.Next() % FLAGS_num;
- char key[100];
- snprintf(key, sizeof(key), "%016d", k);
- Status s = db_->Put(write_options_, key, gen.Generate(value_size_));
- if (!s.ok()) {
- fprintf(stderr, "put error: %s\n", s.ToString().c_str());
- exit(1);
- }
- }
-
- // Do not count any of the preceding work/delay in stats.
- thread->stats.Start();
- }
- }
-
- void Compact(ThreadState* thread) {
- db_->CompactRange(NULL, NULL);
- }
-
- void PrintStats(const char* key) {
- std::string stats;
- if (!db_->GetProperty(key, &stats)) {
- stats = "(failed)";
- }
- fprintf(stdout, "\n%s\n", stats.c_str());
- }
-
- static void WriteToFile(void* arg, const char* buf, int n) {
- reinterpret_cast<WritableFile*>(arg)->Append(Slice(buf, n));
- }
-
- void HeapProfile() {
- char fname[100];
- snprintf(fname, sizeof(fname), "%s/heap-%04d", FLAGS_db, ++heap_counter_);
- WritableFile* file;
- Status s = Env::Default()->NewWritableFile(fname, &file);
- if (!s.ok()) {
- fprintf(stderr, "%s\n", s.ToString().c_str());
- return;
- }
- bool ok = port::GetHeapProfile(WriteToFile, file);
- delete file;
- if (!ok) {
- fprintf(stderr, "heap profiling not supported\n");
- Env::Default()->DeleteFile(fname);
- }
- }
-};
-
-} // namespace leveldb
-
-int main(int argc, char** argv) {
- FLAGS_write_buffer_size = leveldb::Options().write_buffer_size;
- FLAGS_open_files = leveldb::Options().max_open_files;
- std::string default_db_path;
-
- for (int i = 1; i < argc; i++) {
- double d;
- int n;
- char junk;
- if (leveldb::Slice(argv[i]).starts_with("--benchmarks=")) {
- FLAGS_benchmarks = argv[i] + strlen("--benchmarks=");
- } else if (sscanf(argv[i], "--compression_ratio=%lf%c", &d, &junk) == 1) {
- FLAGS_compression_ratio = d;
- } else if (sscanf(argv[i], "--histogram=%d%c", &n, &junk) == 1 &&
- (n == 0 || n == 1)) {
- FLAGS_histogram = n;
- } else if (sscanf(argv[i], "--use_existing_db=%d%c", &n, &junk) == 1 &&
- (n == 0 || n == 1)) {
- FLAGS_use_existing_db = n;
- } else if (sscanf(argv[i], "--num=%d%c", &n, &junk) == 1) {
- FLAGS_num = n;
- } else if (sscanf(argv[i], "--reads=%d%c", &n, &junk) == 1) {
- FLAGS_reads = n;
- } else if (sscanf(argv[i], "--threads=%d%c", &n, &junk) == 1) {
- FLAGS_threads = n;
- } else if (sscanf(argv[i], "--value_size=%d%c", &n, &junk) == 1) {
- FLAGS_value_size = n;
- } else if (sscanf(argv[i], "--write_buffer_size=%d%c", &n, &junk) == 1) {
- FLAGS_write_buffer_size = n;
- } else if (sscanf(argv[i], "--cache_size=%d%c", &n, &junk) == 1) {
- FLAGS_cache_size = n;
- } else if (sscanf(argv[i], "--bloom_bits=%d%c", &n, &junk) == 1) {
- FLAGS_bloom_bits = n;
- } else if (sscanf(argv[i], "--open_files=%d%c", &n, &junk) == 1) {
- FLAGS_open_files = n;
- } else if (strncmp(argv[i], "--db=", 5) == 0) {
- FLAGS_db = argv[i] + 5;
- } else {
- fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
- exit(1);
- }
- }
-
- // Choose a location for the test database if none given with --db=<path>
- if (FLAGS_db == NULL) {
- leveldb::Env::Default()->GetTestDirectory(&default_db_path);
- default_db_path += "/dbbench";
- FLAGS_db = default_db_path.c_str();
- }
-
- leveldb::Benchmark benchmark;
- benchmark.Run();
- return 0;
-}
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