Repo created

TMessagesProj/jni/voip/webrtc/absl/log/log_benchmark.cc

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+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/base/attributes.h"
+#include "absl/base/log_severity.h"
+#include "absl/flags/flag.h"
+#include "absl/log/check.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/flags.h"
+#include "absl/log/log.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/log_sink_registry.h"
+#include "absl/log/vlog_is_on.h"
+#include "benchmark/benchmark.h"
+
+namespace {
+
+class NullLogSink : public absl::LogSink {
+ public:
+  NullLogSink() { absl::AddLogSink(this); }
+
+  ~NullLogSink() override { absl::RemoveLogSink(this); }
+
+  void Send(const absl::LogEntry&) override {}
+};
+
+constexpr int x = -1;
+
+void BM_SuccessfulBinaryCheck(benchmark::State& state) {
+  int n = 0;
+  while (state.KeepRunningBatch(8)) {
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    CHECK_GE(n, x);
+    ++n;
+  }
+  benchmark::DoNotOptimize(n);
+}
+BENCHMARK(BM_SuccessfulBinaryCheck);
+
+static void BM_SuccessfulUnaryCheck(benchmark::State& state) {
+  int n = 0;
+  while (state.KeepRunningBatch(8)) {
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    CHECK(n >= x);
+    ++n;
+  }
+  benchmark::DoNotOptimize(n);
+}
+BENCHMARK(BM_SuccessfulUnaryCheck);
+
+static void BM_DisabledLogOverhead(benchmark::State& state) {
+  absl::ScopedStderrThreshold disable_stderr_logging(
+      absl::LogSeverityAtLeast::kInfinity);
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
+      absl::LogSeverityAtLeast::kInfinity);
+  for (auto _ : state) {
+    LOG(INFO);
+  }
+}
+BENCHMARK(BM_DisabledLogOverhead);
+
+static void BM_EnabledLogOverhead(benchmark::State& state) {
+  absl::ScopedStderrThreshold stderr_logging(
+      absl::LogSeverityAtLeast::kInfinity);
+  absl::log_internal::ScopedMinLogLevel scoped_min_log_level(
+      absl::LogSeverityAtLeast::kInfo);
+  ABSL_ATTRIBUTE_UNUSED NullLogSink null_sink;
+  for (auto _ : state) {
+    LOG(INFO);
+  }
+}
+BENCHMARK(BM_EnabledLogOverhead);
+
+static void BM_VlogIsOnOverhead(benchmark::State& state) {
+  // It would make sense to do this only when state.thread_index == 0,
+  // but thread_index is an int on some platforms (e.g. Android) and a
+  // function returning an int on others. So we just do it on all threads.
+  // TODO(b/152609127): set only if thread_index == 0.
+  absl::SetFlag(&FLAGS_v, 0);
+
+  while (state.KeepRunningBatch(10)) {
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 1
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 2
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 3
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 4
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 5
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 6
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 7
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 8
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 9
+    benchmark::DoNotOptimize(VLOG_IS_ON(0));  // 10
+  }
+}
+BENCHMARK(BM_VlogIsOnOverhead)->ThreadRange(1, 64);
+
+static void BM_VlogIsNotOnOverhead(benchmark::State& state) {
+  // It would make sense to do this only when state.thread_index == 0,
+  // but thread_index is an int on some platforms (e.g. Android) and a
+  // function returning an int on others. So we just do it on all threads.
+  // TODO(b/152609127): set only if thread_index == 0.
+  absl::SetFlag(&FLAGS_v, 0);
+
+  while (state.KeepRunningBatch(10)) {
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 1
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 2
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 3
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 4
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 5
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 6
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 7
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 8
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 9
+    benchmark::DoNotOptimize(VLOG_IS_ON(1));  // 10
+  }
+}
+BENCHMARK(BM_VlogIsNotOnOverhead)->ThreadRange(1, 64);
+
+static void BM_LogEveryNOverhead(benchmark::State& state) {
+  absl::ScopedStderrThreshold disable_stderr_logging(
+      absl::LogSeverityAtLeast::kInfinity);
+  absl::SetMinLogLevel(absl::LogSeverityAtLeast::kInfinity);
+  ABSL_ATTRIBUTE_UNUSED NullLogSink null_sink;
+
+  while (state.KeepRunningBatch(10)) {
+    LOG_EVERY_N_SEC(INFO, 10);
+    LOG_EVERY_N_SEC(INFO, 20);
+    LOG_EVERY_N_SEC(INFO, 30);
+    LOG_EVERY_N_SEC(INFO, 40);
+    LOG_EVERY_N_SEC(INFO, 50);
+    LOG_EVERY_N_SEC(INFO, 60);
+    LOG_EVERY_N_SEC(INFO, 70);
+    LOG_EVERY_N_SEC(INFO, 80);
+    LOG_EVERY_N_SEC(INFO, 90);
+    LOG_EVERY_N_SEC(INFO, 100);
+  }
+}
+BENCHMARK(BM_LogEveryNOverhead)->ThreadRange(1, 64);
+
+}  // namespace
+