3dff28cf9b
Summary: For performance purposes, the lower level routines were changed to use a SystemClock* instead of a std::shared_ptr<SystemClock>. The shared ptr has some performance degradation on certain hardware classes. For most of the system, there is no risk of the pointer being deleted/invalid because the shared_ptr will be stored elsewhere. For example, the ImmutableDBOptions stores the Env which has a std::shared_ptr<SystemClock> in it. The SystemClock* within the ImmutableDBOptions is essentially a "short cut" to gain access to this constant resource. There were a few classes (PeriodicWorkScheduler?) where the "short cut" property did not hold. In those cases, the shared pointer was preserved. Using db_bench readrandom perf_level=3 on my EC2 box, this change performed as well or better than 6.17: 6.17: readrandom : 28.046 micros/op 854902 ops/sec; 61.3 MB/s (355999 of 355999 found) 6.18: readrandom : 32.615 micros/op 735306 ops/sec; 52.7 MB/s (290999 of 290999 found) PR: readrandom : 27.500 micros/op 871909 ops/sec; 62.5 MB/s (367999 of 367999 found) (Note that the times for 6.18 are prior to revert of the SystemClock). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8033 Reviewed By: pdillinger Differential Revision: D27014563 Pulled By: mrambacher fbshipit-source-id: ad0459eba03182e454391b5926bf5cdd45657b67
175 lines
5.1 KiB
C++
175 lines
5.1 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 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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//
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#ifdef GFLAGS
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#include "db_stress_tool/db_stress_common.h"
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#include "utilities/fault_injection_fs.h"
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namespace ROCKSDB_NAMESPACE {
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void ThreadBody(void* v) {
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ThreadState* thread = reinterpret_cast<ThreadState*>(v);
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SharedState* shared = thread->shared;
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if (!FLAGS_skip_verifydb && shared->ShouldVerifyAtBeginning()) {
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thread->shared->GetStressTest()->VerifyDb(thread);
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}
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{
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MutexLock l(shared->GetMutex());
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shared->IncInitialized();
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if (shared->AllInitialized()) {
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shared->GetCondVar()->SignalAll();
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}
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while (!shared->Started()) {
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shared->GetCondVar()->Wait();
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}
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}
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thread->shared->GetStressTest()->OperateDb(thread);
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{
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MutexLock l(shared->GetMutex());
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shared->IncOperated();
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if (shared->AllOperated()) {
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shared->GetCondVar()->SignalAll();
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}
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while (!shared->VerifyStarted()) {
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shared->GetCondVar()->Wait();
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}
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}
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if (!FLAGS_skip_verifydb) {
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thread->shared->GetStressTest()->VerifyDb(thread);
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}
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{
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MutexLock l(shared->GetMutex());
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shared->IncDone();
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if (shared->AllDone()) {
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shared->GetCondVar()->SignalAll();
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}
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}
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}
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bool RunStressTest(StressTest* stress) {
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SystemClock* clock = db_stress_env->GetSystemClock().get();
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stress->InitDb();
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SharedState shared(db_stress_env, stress);
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stress->FinishInitDb(&shared);
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#ifndef NDEBUG
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if (FLAGS_sync_fault_injection) {
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fault_fs_guard->SetFilesystemDirectWritable(false);
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}
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#endif
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uint32_t n = shared.GetNumThreads();
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uint64_t now = clock->NowMicros();
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fprintf(stdout, "%s Initializing worker threads\n",
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clock->TimeToString(now / 1000000).c_str());
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std::vector<ThreadState*> threads(n);
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for (uint32_t i = 0; i < n; i++) {
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threads[i] = new ThreadState(i, &shared);
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db_stress_env->StartThread(ThreadBody, threads[i]);
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}
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ThreadState bg_thread(0, &shared);
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if (FLAGS_compaction_thread_pool_adjust_interval > 0) {
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db_stress_env->StartThread(PoolSizeChangeThread, &bg_thread);
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}
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ThreadState continuous_verification_thread(0, &shared);
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if (FLAGS_continuous_verification_interval > 0) {
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db_stress_env->StartThread(DbVerificationThread,
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&continuous_verification_thread);
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}
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// Each thread goes through the following states:
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// initializing -> wait for others to init -> read/populate/depopulate
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// wait for others to operate -> verify -> done
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{
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MutexLock l(shared.GetMutex());
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while (!shared.AllInitialized()) {
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shared.GetCondVar()->Wait();
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}
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if (shared.ShouldVerifyAtBeginning()) {
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if (shared.HasVerificationFailedYet()) {
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fprintf(stderr, "Crash-recovery verification failed :(\n");
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} else {
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fprintf(stdout, "Crash-recovery verification passed :)\n");
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}
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}
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now = clock->NowMicros();
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fprintf(stdout, "%s Starting database operations\n",
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clock->TimeToString(now / 1000000).c_str());
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shared.SetStart();
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shared.GetCondVar()->SignalAll();
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while (!shared.AllOperated()) {
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shared.GetCondVar()->Wait();
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}
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now = clock->NowMicros();
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if (FLAGS_test_batches_snapshots) {
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fprintf(stdout, "%s Limited verification already done during gets\n",
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clock->TimeToString((uint64_t)now / 1000000).c_str());
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} else if (FLAGS_skip_verifydb) {
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fprintf(stdout, "%s Verification skipped\n",
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clock->TimeToString((uint64_t)now / 1000000).c_str());
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} else {
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fprintf(stdout, "%s Starting verification\n",
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clock->TimeToString((uint64_t)now / 1000000).c_str());
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}
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shared.SetStartVerify();
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shared.GetCondVar()->SignalAll();
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while (!shared.AllDone()) {
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shared.GetCondVar()->Wait();
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}
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}
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for (unsigned int i = 1; i < n; i++) {
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threads[0]->stats.Merge(threads[i]->stats);
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}
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threads[0]->stats.Report("Stress Test");
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for (unsigned int i = 0; i < n; i++) {
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delete threads[i];
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threads[i] = nullptr;
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}
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now = clock->NowMicros();
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if (!FLAGS_skip_verifydb && !FLAGS_test_batches_snapshots &&
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!shared.HasVerificationFailedYet()) {
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fprintf(stdout, "%s Verification successful\n",
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clock->TimeToString(now / 1000000).c_str());
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}
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stress->PrintStatistics();
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if (FLAGS_compaction_thread_pool_adjust_interval > 0 ||
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FLAGS_continuous_verification_interval > 0) {
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MutexLock l(shared.GetMutex());
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shared.SetShouldStopBgThread();
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while (!shared.BgThreadsFinished()) {
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shared.GetCondVar()->Wait();
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}
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}
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if (!stress->VerifySecondaries()) {
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return false;
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}
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if (shared.HasVerificationFailedYet()) {
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fprintf(stderr, "Verification failed :(\n");
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return false;
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}
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return true;
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}
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} // namespace ROCKSDB_NAMESPACE
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#endif // GFLAGS
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