Add various benchmarks.

These are based on ones from system/extras/tests/bionic/.

Change-Id: I7b1ae15a2ca5d1031a6a511d97b88125c1770047

benchmarks/pthread_benchmark.cpp

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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
+ *
+ *      http://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 "benchmark.h"
+
+#include <pthread.h>
+
+static void BM_pthread_self(int iters) {
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_self();
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_pthread_self);
+
+static void BM_pthread_getspecific(int iters) {
+  StopBenchmarkTiming();
+  pthread_key_t key;
+  pthread_key_create(&key, NULL);
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_getspecific(key);
+  }
+
+  StopBenchmarkTiming();
+  pthread_key_delete(key);
+}
+BENCHMARK(BM_pthread_getspecific);
+
+static void DummyPthreadOnceInitFunction() {
+}
+
+static void BM_pthread_once(int iters) {
+  StopBenchmarkTiming();
+  pthread_once_t once = PTHREAD_ONCE_INIT;
+  pthread_once(&once, DummyPthreadOnceInitFunction);
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_once(&once, DummyPthreadOnceInitFunction);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_pthread_once);
+
+static void BM_pthread_mutex_lock(int iters) {
+  StopBenchmarkTiming();
+  pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_mutex_lock(&mutex);
+    pthread_mutex_unlock(&mutex);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_pthread_mutex_lock);
+
+static void BM_pthread_mutex_lock_ERRORCHECK(int iters) {
+  StopBenchmarkTiming();
+  pthread_mutex_t mutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER;
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_mutex_lock(&mutex);
+    pthread_mutex_unlock(&mutex);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_pthread_mutex_lock_ERRORCHECK);
+
+static void BM_pthread_mutex_lock_RECURSIVE(int iters) {
+  StopBenchmarkTiming();
+  pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER;
+  StartBenchmarkTiming();
+
+  for (int i = 0; i < iters; ++i) {
+    pthread_mutex_lock(&mutex);
+    pthread_mutex_unlock(&mutex);
+  }
+
+  StopBenchmarkTiming();
+}
+BENCHMARK(BM_pthread_mutex_lock_RECURSIVE);