SERVER-54586 FailPoint benchmark

2 files changed, 114 insertions, 0 deletions

diff --git a/src/mongo/util/SConscript b/src/mongo/util/SConscript
index dc61bbab177..f0fc66759a2 100644
--- a/src/mongo/util/SConscript
+++ b/src/mongo/util/SConscript
@@ -210,6 +210,15 @@ env.Library(
     ],
 )
 
+env.Benchmark(
+    target='fail_point_bm',
+    source=[
+        'fail_point_bm.cpp',
+    ],
+    LIBDEPS=[
+    ],
+)
+
 env.Library(
     target="testing_options",
     source=[
diff --git a/src/mongo/util/fail_point_bm.cpp b/src/mongo/util/fail_point_bm.cpp
new file mode 100644
index 00000000000..f60b9731ce8
--- /dev/null
+++ b/src/mongo/util/fail_point_bm.cpp
@@ -0,0 +1,105 @@
+/**
+ *    Copyright (C) 2021-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+
+#include "mongo/platform/basic.h"
+
+#include <benchmark/benchmark.h>
+
+#include "mongo/platform/atomic_word.h"
+#include "mongo/platform/compiler.h"
+#include "mongo/util/fail_point.h"
+
+namespace mongo {
+namespace {
+
+MONGO_FAIL_POINT_DEFINE(failPointBench);
+AtomicWord<bool> atomic;
+
+void BM_AtomicLoadAndBranch(benchmark::State& state) {
+    atomic.store(!!state.range(0));
+    for (auto _ : state) {
+        if (MONGO_unlikely(atomic.load())) {
+            benchmark::DoNotOptimize(0);
+        }
+    }
+}
+BENCHMARK(BM_AtomicLoadAndBranch)->Range(0, 1);
+
+void BM_FailPointShouldFail(benchmark::State& state) {
+    failPointBench.setMode(state.range(0) ? FailPoint::alwaysOn : FailPoint::off);
+    for (auto _ : state) {
+        if (MONGO_unlikely(failPointBench.shouldFail())) {
+            benchmark::DoNotOptimize(0);
+        }
+    }
+    failPointBench.setMode(FailPoint::off);
+}
+BENCHMARK(BM_FailPointShouldFail)->Range(0, 1);
+
+void BM_FailPointExecute(benchmark::State& state) {
+    failPointBench.setMode(state.range(0) ? FailPoint::alwaysOn : FailPoint::off);
+    for (auto _ : state)
+        failPointBench.execute([](auto&&) { benchmark::DoNotOptimize(0); });
+    failPointBench.setMode(FailPoint::off);
+}
+BENCHMARK(BM_FailPointExecute)->Range(0, 1);
+
+void BM_FailPointExecuteIf(benchmark::State& state) {
+    failPointBench.setMode(state.range(0) ? FailPoint::alwaysOn : FailPoint::off);
+    for (auto _ : state)
+        failPointBench.executeIf([](auto&&) { benchmark::DoNotOptimize(0); }, nullptr);
+    failPointBench.setMode(FailPoint::off);
+}
+BENCHMARK(BM_FailPointExecuteIf)->Range(0, 1);
+
+void BM_FailPointScoped(benchmark::State& state) {
+    failPointBench.setMode(state.range(0) ? FailPoint::alwaysOn : FailPoint::off);
+    for (auto _ : state) {
+        auto scoped = failPointBench.scoped();
+        if (MONGO_unlikely(scoped.isActive()))
+            benchmark::DoNotOptimize(0);
+    }
+    failPointBench.setMode(FailPoint::off);
+}
+BENCHMARK(BM_FailPointScoped)->Range(0, 1);
+
+void BM_FailPointScopedIf(benchmark::State& state) {
+    failPointBench.setMode(state.range(0) ? FailPoint::alwaysOn : FailPoint::off);
+    for (auto _ : state) {
+        auto scoped = failPointBench.scopedIf([](auto&&) { return false; });
+        if (MONGO_unlikely(scoped.isActive()))
+            benchmark::DoNotOptimize(0);
+    }
+    failPointBench.setMode(FailPoint::off);
+}
+BENCHMARK(BM_FailPointScopedIf)->Range(0, 1);
+
+}  // namespace
+}  // namespace mongo