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92 Zeilen
2.5 KiB
92 Zeilen
2.5 KiB
// Copyright (c) 2019 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <cinttypes>
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#include <cstdio>
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#include <string>
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#include "gtest/gtest.h"
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#include "benchmark/benchmark.h"
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#include "db/version_set.h"
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#include "leveldb/comparator.h"
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#include "leveldb/db.h"
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#include "leveldb/env.h"
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#include "leveldb/options.h"
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#include "port/port.h"
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#include "util/mutexlock.h"
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#include "util/testutil.h"
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namespace leveldb {
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namespace {
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std::string MakeKey(unsigned int num) {
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char buf[30];
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std::snprintf(buf, sizeof(buf), "%016u", num);
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return std::string(buf);
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}
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void BM_LogAndApply(benchmark::State& state) {
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const int num_base_files = state.range(0);
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std::string dbname = testing::TempDir() + "leveldb_test_benchmark";
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DestroyDB(dbname, Options());
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DB* db = nullptr;
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Options opts;
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opts.create_if_missing = true;
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Status s = DB::Open(opts, dbname, &db);
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ASSERT_LEVELDB_OK(s);
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ASSERT_TRUE(db != nullptr);
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delete db;
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db = nullptr;
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Env* env = Env::Default();
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port::Mutex mu;
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MutexLock l(&mu);
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InternalKeyComparator cmp(BytewiseComparator());
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Options options;
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VersionSet vset(dbname, &options, nullptr, &cmp);
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bool save_manifest;
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ASSERT_LEVELDB_OK(vset.Recover(&save_manifest));
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VersionEdit vbase;
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uint64_t fnum = 1;
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for (int i = 0; i < num_base_files; i++) {
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InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
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InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
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vbase.AddFile(2, fnum++, 1 /* file size */, start, limit);
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}
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ASSERT_LEVELDB_OK(vset.LogAndApply(&vbase, &mu));
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uint64_t start_micros = env->NowMicros();
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for (auto st : state) {
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VersionEdit vedit;
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vedit.RemoveFile(2, fnum);
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InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
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InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
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vedit.AddFile(2, fnum++, 1 /* file size */, start, limit);
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vset.LogAndApply(&vedit, &mu);
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}
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uint64_t stop_micros = env->NowMicros();
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unsigned int us = stop_micros - start_micros;
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char buf[16];
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std::snprintf(buf, sizeof(buf), "%d", num_base_files);
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std::fprintf(stderr,
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"BM_LogAndApply/%-6s %8" PRIu64
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" iters : %9u us (%7.0f us / iter)\n",
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buf, state.iterations(), us, ((float)us) / state.iterations());
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}
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BENCHMARK(BM_LogAndApply)->Arg(1)->Arg(100)->Arg(10000)->Arg(100000);
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} // namespace
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} // namespace leveldb
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BENCHMARK_MAIN();
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