You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
376 lines
11 KiB
376 lines
11 KiB
// 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 "include/cache.h"
|
|
#include "include/db.h"
|
|
#include "include/env.h"
|
|
#include "include/write_batch.h"
|
|
#include "util/histogram.h"
|
|
#include "util/random.h"
|
|
#include "util/testutil.h"
|
|
|
|
// Comma-separated list of operations to run in the specified order
|
|
// Actual benchmarks:
|
|
// writeseq -- write N values in sequential key order
|
|
// writerandom -- write N values in random key order
|
|
// writebig -- write N/1000 100K valuesin random order
|
|
// readseq -- read N values sequentially
|
|
// readrandom -- read N values in random order
|
|
// Meta operations:
|
|
// compact -- Compact the entire DB
|
|
// heapprofile -- Dump a heap profile (if supported by this port)
|
|
// sync -- switch to synchronous writes (not the default)
|
|
// nosync -- switch to asynchronous writes (the default)
|
|
// tenth -- divide N by 10 (i.e., following benchmarks are smaller)
|
|
// normal -- reset N back to its normal value (1000000)
|
|
static const char* FLAGS_benchmarks =
|
|
"writeseq,"
|
|
"writeseq,"
|
|
"writerandom,"
|
|
"sync,tenth,tenth,writerandom,nosync,normal,"
|
|
"readseq,"
|
|
"readrandom,"
|
|
"compact,"
|
|
"readseq,"
|
|
"readrandom,"
|
|
"writebig";
|
|
|
|
// Number of key/values to place in database
|
|
static int FLAGS_num = 1000000;
|
|
|
|
// 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 = 0.25;
|
|
|
|
// Print histogram of operation timings
|
|
static bool FLAGS_histogram = false;
|
|
|
|
// Number of bytes to buffer in memtable before compacting
|
|
static int FLAGS_write_buffer_size = 1 << 20;
|
|
|
|
namespace leveldb {
|
|
|
|
// Helper for quickly generating random data.
|
|
namespace {
|
|
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(int len) {
|
|
if (pos_ + len > data_.size()) {
|
|
pos_ = 0;
|
|
assert(len < data_.size());
|
|
}
|
|
pos_ += len;
|
|
return Slice(data_.data() + pos_ - len, len);
|
|
}
|
|
};
|
|
}
|
|
|
|
class Benchmark {
|
|
private:
|
|
Cache* cache_;
|
|
DB* db_;
|
|
int num_;
|
|
bool sync_;
|
|
int heap_counter_;
|
|
double start_;
|
|
double last_op_finish_;
|
|
int64_t bytes_;
|
|
std::string message_;
|
|
Histogram hist_;
|
|
RandomGenerator gen_;
|
|
Random rand_;
|
|
|
|
// State kept for progress messages
|
|
int done_;
|
|
int next_report_; // When to report next
|
|
|
|
void Start() {
|
|
start_ = Env::Default()->NowMicros() * 1e-6;
|
|
bytes_ = 0;
|
|
message_.clear();
|
|
last_op_finish_ = start_;
|
|
hist_.Clear();
|
|
done_ = 0;
|
|
next_report_ = 100;
|
|
}
|
|
|
|
void FinishedSingleOp() {
|
|
if (FLAGS_histogram) {
|
|
double now = Env::Default()->NowMicros() * 1e-6;
|
|
double micros = (now - last_op_finish_) * 1e6;
|
|
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_ < 10000) {
|
|
next_report_ += 1000;
|
|
} else if (next_report_ < 100000) {
|
|
next_report_ += 10000;
|
|
} else {
|
|
next_report_ += 100000;
|
|
}
|
|
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
|
|
fflush(stderr);
|
|
}
|
|
}
|
|
|
|
void Stop(const Slice& name) {
|
|
double finish = Env::Default()->NowMicros() * 1e-6;
|
|
|
|
// Pretend at least one op was done in case we are running a benchmark
|
|
// that does nto call FinishedSingleOp().
|
|
if (done_ < 1) done_ = 1;
|
|
|
|
if (bytes_ > 0) {
|
|
char rate[100];
|
|
snprintf(rate, sizeof(rate), "%5.1f MB/s",
|
|
(bytes_ / 1048576.0) / (finish - start_));
|
|
if (!message_.empty()) {
|
|
message_.push_back(' ');
|
|
}
|
|
message_.append(rate);
|
|
}
|
|
|
|
fprintf(stdout, "%-12s : %10.3f micros/op;%s%s\n",
|
|
name.ToString().c_str(),
|
|
(finish - start_) * 1e6 / done_,
|
|
(message_.empty() ? "" : " "),
|
|
message_.c_str());
|
|
if (FLAGS_histogram) {
|
|
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
|
|
}
|
|
fflush(stdout);
|
|
}
|
|
|
|
public:
|
|
enum Order { SEQUENTIAL, RANDOM };
|
|
|
|
Benchmark() : cache_(NewLRUCache(200<<20)),
|
|
db_(NULL),
|
|
num_(FLAGS_num),
|
|
sync_(false),
|
|
heap_counter_(0),
|
|
bytes_(0),
|
|
rand_(301) {
|
|
std::vector<std::string> files;
|
|
Env::Default()->GetChildren("/tmp/dbbench", &files);
|
|
for (int i = 0; i < files.size(); i++) {
|
|
if (Slice(files[i]).starts_with("heap-")) {
|
|
Env::Default()->DeleteFile("/tmp/dbbench/" + files[i]);
|
|
}
|
|
}
|
|
DestroyDB("/tmp/dbbench", Options());
|
|
}
|
|
|
|
~Benchmark() {
|
|
delete db_;
|
|
delete cache_;
|
|
}
|
|
|
|
void Run() {
|
|
Options options;
|
|
options.create_if_missing = true;
|
|
options.max_open_files = 10000;
|
|
options.block_cache = cache_;
|
|
options.write_buffer_size = FLAGS_write_buffer_size;
|
|
|
|
Start();
|
|
Status s = DB::Open(options, "/tmp/dbbench", &db_);
|
|
Stop("open");
|
|
if (!s.ok()) {
|
|
fprintf(stderr, "open error: %s\n", s.ToString().c_str());
|
|
exit(1);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
Start();
|
|
if (name == Slice("writeseq")) {
|
|
Write(SEQUENTIAL, num_, FLAGS_value_size);
|
|
} else if (name == Slice("writerandom")) {
|
|
Write(RANDOM, num_, FLAGS_value_size);
|
|
} else if (name == Slice("writebig")) {
|
|
Write(RANDOM, num_ / 1000, 100 * 1000);
|
|
} else if (name == Slice("readseq")) {
|
|
Read(SEQUENTIAL);
|
|
} else if (name == Slice("readrandom")) {
|
|
Read(RANDOM);
|
|
} else if (name == Slice("compact")) {
|
|
Compact();
|
|
} else if (name == Slice("heapprofile")) {
|
|
HeapProfile();
|
|
} else if (name == Slice("sync")) {
|
|
sync_ = true;
|
|
} else if (name == Slice("nosync")) {
|
|
sync_ = false;
|
|
} else if (name == Slice("tenth")) {
|
|
num_ = num_ / 10;
|
|
} else if (name == Slice("normal")) {
|
|
num_ = FLAGS_num;
|
|
} else {
|
|
fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
|
|
}
|
|
Stop(name);
|
|
}
|
|
}
|
|
|
|
void Write(Order order, int num_entries, int value_size) {
|
|
WriteBatch batch;
|
|
Status s;
|
|
std::string val;
|
|
WriteOptions options;
|
|
options.sync = sync_;
|
|
for (int i = 0; i < num_entries; i++) {
|
|
const int k = (order == SEQUENTIAL) ? i : (rand_.Next() % FLAGS_num);
|
|
char key[100];
|
|
snprintf(key, sizeof(key), "%012d", k);
|
|
batch.Clear();
|
|
batch.Put(key, gen_.Generate(value_size));
|
|
s = db_->Write(options, &batch);
|
|
bytes_ += value_size + strlen(key);
|
|
if (!s.ok()) {
|
|
fprintf(stderr, "put error: %s\n", s.ToString().c_str());
|
|
exit(1);
|
|
}
|
|
FinishedSingleOp();
|
|
}
|
|
}
|
|
|
|
void Read(Order order) {
|
|
ReadOptions options;
|
|
if (order == SEQUENTIAL) {
|
|
Iterator* iter = db_->NewIterator(options);
|
|
int i = 0;
|
|
for (iter->SeekToFirst(); i < num_ && iter->Valid(); iter->Next()) {
|
|
bytes_ += iter->key().size() + iter->value().size();
|
|
FinishedSingleOp();
|
|
++i;
|
|
}
|
|
delete iter;
|
|
} else {
|
|
std::string value;
|
|
for (int i = 0; i < num_; i++) {
|
|
char key[100];
|
|
const int k = (order == SEQUENTIAL) ? i : (rand_.Next() % FLAGS_num);
|
|
snprintf(key, sizeof(key), "%012d", k);
|
|
db_->Get(options, key, &value);
|
|
FinishedSingleOp();
|
|
}
|
|
}
|
|
}
|
|
|
|
void Compact() {
|
|
DBImpl* dbi = reinterpret_cast<DBImpl*>(db_);
|
|
dbi->TEST_CompactMemTable();
|
|
int max_level_with_files = 1;
|
|
for (int level = 1; level < config::kNumLevels; level++) {
|
|
uint64_t v;
|
|
char name[100];
|
|
snprintf(name, sizeof(name), "leveldb.num-files-at-level%d", level);
|
|
if (db_->GetProperty(name, &v) && v > 0) {
|
|
max_level_with_files = level;
|
|
}
|
|
}
|
|
for (int level = 0; level < max_level_with_files; level++) {
|
|
dbi->TEST_CompactRange(level, "", "~");
|
|
}
|
|
}
|
|
|
|
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), "/tmp/dbbench/heap-%04d", ++heap_counter_);
|
|
WritableFile* file;
|
|
Status s = Env::Default()->NewWritableFile(fname, &file);
|
|
if (!s.ok()) {
|
|
message_ = s.ToString();
|
|
return;
|
|
}
|
|
bool ok = port::GetHeapProfile(WriteToFile, file);
|
|
delete file;
|
|
if (!ok) {
|
|
message_ = "not supported";
|
|
Env::Default()->DeleteFile(fname);
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
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], "--num=%d%c", &n, &junk) == 1) {
|
|
FLAGS_num = 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 {
|
|
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
leveldb::Benchmark benchmark;
|
|
benchmark.Run();
|
|
return 0;
|
|
}
|