1 files changed, 71 insertions, 0 deletions
diff --git a/test/cpp/qps/usage_timer.cc b/test/cpp/qps/usage_timer.cc
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+++ b/test/cpp/qps/usage_timer.cc
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+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/qps/usage_timer.h"
+
+#include <grpc/support/time.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+
+Timer::Timer() : start_(Sample()) {}
+
+double Timer::Now() {
+  auto ts = gpr_now(GPR_CLOCK_REALTIME);
+  return ts.tv_sec + 1e-9 * ts.tv_nsec;
+}
+
+static double time_double(struct timeval* tv) {
+  return tv->tv_sec + 1e-6 * tv->tv_usec;
+}
+
+Timer::Result Timer::Sample() {
+  struct rusage usage;
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  getrusage(RUSAGE_SELF, &usage);
+
+  Result r;
+  r.wall = time_double(&tv);
+  r.user = time_double(&usage.ru_utime);
+  r.system = time_double(&usage.ru_stime);
+  return r;
+}
+
+Timer::Result Timer::Mark() const {
+  Result s = Sample();
+  Result r;
+  r.wall = s.wall - start_.wall;
+  r.user = s.user - start_.user;
+  r.system = s.system - start_.system;
+  return r;
+}