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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#ifndef GFLAGS
#include <cstdio>
int main() {
fprintf(stderr, "Please install gflags to run rocksdb tools\n");
return 1;
}
#else
#include "file/writable_file_writer.h"
#include "monitoring/histogram.h"
#include "rocksdb/env.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/gflags_compat.h"
using GFLAGS_NAMESPACE::ParseCommandLineFlags;
using GFLAGS_NAMESPACE::SetUsageMessage;
// A simple benchmark to simulate transactional logs
DEFINE_int32(num_records, 6000, "Number of records.");
DEFINE_int32(record_size, 249, "Size of each record.");
DEFINE_int32(record_interval, 10000, "Interval between records (microSec)");
DEFINE_int32(bytes_per_sync, 0, "bytes_per_sync parameter in EnvOptions");
DEFINE_bool(enable_sync, false, "sync after each write.");
namespace ROCKSDB_NAMESPACE {
void RunBenchmark() {
std::string file_name = test::PerThreadDBPath("log_write_benchmark.log");
DBOptions options;
Env* env = Env::Default();
EnvOptions env_options = env->OptimizeForLogWrite(EnvOptions(), options);
env_options.bytes_per_sync = FLAGS_bytes_per_sync;
std::unique_ptr<WritableFile> file;
env->NewWritableFile(file_name, &file, env_options);
std::unique_ptr<WritableFileWriter> writer;
writer.reset(new WritableFileWriter(std::move(file), file_name, env_options,
env, nullptr /* stats */,
options.listeners));
std::string record;
record.assign(FLAGS_record_size, 'X');
HistogramImpl hist;
uint64_t start_time = env->NowMicros();
for (int i = 0; i < FLAGS_num_records; i++) {
uint64_t start_nanos = env->NowNanos();
writer->Append(record);
writer->Flush();
if (FLAGS_enable_sync) {
writer->Sync(false);
}
hist.Add(env->NowNanos() - start_nanos);
if (i % 1000 == 1) {
fprintf(stderr, "Wrote %d records...\n", i);
}
int time_to_sleep =
(i + 1) * FLAGS_record_interval - (env->NowMicros() - start_time);
if (time_to_sleep > 0) {
env->SleepForMicroseconds(time_to_sleep);
}
}
fprintf(stderr, "Distribution of latency of append+flush: \n%s",
hist.ToString().c_str());
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
SetUsageMessage(std::string("\nUSAGE:\n") + std::string(argv[0]) +
" [OPTIONS]...");
ParseCommandLineFlags(&argc, &argv, true);
ROCKSDB_NAMESPACE::RunBenchmark();
return 0;
}
#endif // GFLAGS
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