70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
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// Copyright (c) 2013, 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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#include <gflags/gflags.h>
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#include "rocksdb/env.h"
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#include "util/histogram.h"
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#include "util/testharness.h"
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#include "util/testutil.h"
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// A simple benchmark to simulate transactional logs
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DEFINE_int32(num_records, 6000, "Size of each record.");
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DEFINE_int32(record_size, 249, "Size of each record.");
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DEFINE_int32(record_interval, 10000, "Interval between records (microSec)");
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DEFINE_int32(bytes_per_sync, 0, "bytes_per_sync parameter in EnvOptions");
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DEFINE_bool(enable_sync, false, "sync after each write.");
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namespace rocksdb {
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void RunBenchmark() {
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std::string file_name = test::TmpDir() + "/log_write_bench.log";
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Env* env = Env::Default();
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EnvOptions env_options;
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env_options.use_mmap_writes = false;
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env_options.bytes_per_sync = FLAGS_bytes_per_sync;
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unique_ptr<WritableFile> file;
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env->NewWritableFile(file_name, &file, env_options);
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std::string record;
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record.assign('X', FLAGS_record_size);
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HistogramImpl hist;
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uint64_t start_time = env->NowMicros();
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for (int i = 0; i < FLAGS_num_records; i++) {
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uint64_t start_nanos = env->NowNanos();
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file->Append(record);
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file->Flush();
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if (FLAGS_enable_sync) {
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file->Sync();
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}
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hist.Add(env->NowNanos() - start_nanos);
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if (i % 1000 == 1) {
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fprintf(stderr, "Wrote %d records...\n", i);
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}
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int time_to_sleep =
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(i + 1) * FLAGS_record_interval - (env->NowMicros() - start_time);
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if (time_to_sleep > 0) {
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env->SleepForMicroseconds(time_to_sleep);
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}
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}
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fprintf(stderr, "Distribution of latency of append+flush: \n%s",
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hist.ToString().c_str());
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}
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} // namespace rocksdb
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int main(int argc, char** argv) {
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google::SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
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" [OPTIONS]...");
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google::ParseCommandLineFlags(&argc, &argv, true);
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rocksdb::RunBenchmark();
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return 0;
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}
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