Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/qps/usage_timer.cc

Index: third_party/grpc/test/cpp/qps/usage_timer.cc
diff --git a/third_party/tcmalloc/vendor/src/base/synchronization_profiling.h b/third_party/grpc/test/cpp/qps/usage_timer.cc
similarity index 63%
copy from third_party/tcmalloc/vendor/src/base/synchronization_profiling.h
copy to third_party/grpc/test/cpp/qps/usage_timer.cc
index cf02c218a111806189f71f7b528a83b5ceb164a4..6663a9ac1036b65727dadaf491bd5823b03626ff 100644
--- a/third_party/tcmalloc/vendor/src/base/synchronization_profiling.h
+++ b/third_party/grpc/test/cpp/qps/usage_timer.cc
@@ -1,4 +1,6 @@
-/* Copyright (c) 2010, Google Inc.
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,24 +29,43 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * ---
- * Author: Chris Ruemmler
  */
 
-#ifndef BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_
-#define BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_
+#include "test/cpp/qps/usage_timer.h"
+
+#include <grpc/support/time.h>
+#include <sys/resource.h>
+#include <sys/time.h>
 
-#include "base/basictypes.h"
+UsageTimer::UsageTimer() : start_(Sample()) {}
 
-namespace base {
+double UsageTimer::Now() {
+  auto ts = gpr_now(GPR_CLOCK_REALTIME);
+  return ts.tv_sec + 1e-9 * ts.tv_nsec;
+}
 
-// We can do contention-profiling of SpinLocks, but the code is in
-// mutex.cc, which is not always linked in with spinlock.  Hence we
-// provide a weak definition, which are used if mutex.cc isn't linked in.
+static double time_double(struct timeval* tv) {
+  return tv->tv_sec + 1e-6 * tv->tv_usec;
+}
+
+UsageTimer::Result UsageTimer::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;
+}
 
-// Submit the number of cycles the spinlock spent contending.
-ATTRIBUTE_WEAK extern void SubmitSpinLockProfileData(const void *, int64);
-extern void SubmitSpinLockProfileData(const void *contendedlock,
-                                      int64 wait_cycles) {}
+UsageTimer::Result UsageTimer::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;
 }
-#endif  // BASE_AUXILIARY_SYNCHRONIZATION_PROFILING_H_