Add various benchmarks.
These are based on ones from system/extras/tests/bionic/.
Change-Id: I7b1ae15a2ca5d1031a6a511d97b88125c1770047
diff --git a/benchmarks/stdio_benchmark.cpp b/benchmarks/stdio_benchmark.cpp
new file mode 100644
index 0000000..e899df7
--- /dev/null
+++ b/benchmarks/stdio_benchmark.cpp
@@ -0,0 +1,61 @@
+/*
+ * 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 <stdio.h>
+
+#define KB 1024
+#define MB 1024*KB
+
+#define AT_COMMON_SIZES \
+ Arg(1)->Arg(2)->Arg(3)->Arg(4)->Arg(8)->Arg(16)->Arg(32)->Arg(64)->Arg(512)-> \
+ Arg(1*KB)->Arg(4*KB)->Arg(8*KB)->Arg(16*KB)->Arg(64*KB)
+
+static void BM_stdio_fread(int iters, int chunk_size) {
+ StopBenchmarkTiming();
+ FILE* fp = fopen("/dev/zero", "rw");
+ char* buf = new char[chunk_size];
+ StartBenchmarkTiming();
+
+ for (int i = 0; i < iters; ++i) {
+ fread(buf, chunk_size, 1, fp);
+ }
+
+ StopBenchmarkTiming();
+ SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size));
+ delete[] buf;
+ fclose(fp);
+}
+BENCHMARK(BM_stdio_fread)->AT_COMMON_SIZES;
+
+
+static void BM_stdio_fwrite(int iters, int chunk_size) {
+ StopBenchmarkTiming();
+ FILE* fp = fopen("/dev/zero", "rw");
+ char* buf = new char[chunk_size];
+ StartBenchmarkTiming();
+
+ for (int i = 0; i < iters; ++i) {
+ fwrite(buf, chunk_size, 1, fp);
+ }
+
+ StopBenchmarkTiming();
+ SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size));
+ delete[] buf;
+ fclose(fp);
+}
+BENCHMARK(BM_stdio_fwrite)->AT_COMMON_SIZES;