Add basic microbenchmarks.

PiperOrigin-RevId: 296104390

1 files changed, 66 insertions, 0 deletions

diff --git a/test/perf/linux/pipe_benchmark.cc b/test/perf/linux/pipe_benchmark.cc
new file mode 100644
index 000000000..8f5f6a2a3
--- /dev/null
+++ b/test/perf/linux/pipe_benchmark.cc
@@ -0,0 +1,66 @@
+// Copyright 2020 The gVisor 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
+//
+//     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 <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <cerrno>
+
+#include "gtest/gtest.h"
+#include "benchmark/benchmark.h"
+#include "test/util/logging.h"
+#include "test/util/test_util.h"
+#include "test/util/thread_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+void BM_Pipe(benchmark::State& state) {
+  int fds[2];
+  TEST_CHECK(pipe(fds) == 0);
+
+  const int size = state.range(0);
+  std::vector<char> wbuf(size);
+  std::vector<char> rbuf(size);
+  RandomizeBuffer(wbuf.data(), size);
+
+  ScopedThread t([&] {
+    auto const fd = fds[1];
+    for (int i = 0; i < state.max_iterations; i++) {
+      TEST_CHECK(WriteFd(fd, wbuf.data(), wbuf.size()) == size);
+    }
+  });
+
+  for (auto _ : state) {
+    TEST_CHECK(ReadFd(fds[0], rbuf.data(), rbuf.size()) == size);
+  }
+
+  t.Join();
+
+  close(fds[0]);
+  close(fds[1]);
+
+  state.SetBytesProcessed(static_cast<int64_t>(size) *
+                          static_cast<int64_t>(state.iterations()));
+}
+
+BENCHMARK(BM_Pipe)->Range(1, 1 << 20)->UseRealTime();
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor