Line data    Source code

       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include "test/cpp/qps/timer.h"
      35             : 
      36             : #include <sys/time.h>
      37             : #include <sys/resource.h>
      38             : #include <grpc/support/time.h>
      39             : 
      40          36 : Timer::Timer() : start_(Sample()) {}
      41             : 
      42     2537172 : double Timer::Now() {
      43     2537172 :   auto ts = gpr_now(GPR_CLOCK_REALTIME);
      44     2539972 :   return ts.tv_sec + 1e-9 * ts.tv_nsec;
      45             : }
      46             : 
      47         180 : static double time_double(struct timeval* tv) {
      48         180 :   return tv->tv_sec + 1e-6 * tv->tv_usec;
      49             : }
      50             : 
      51          60 : Timer::Result Timer::Sample() {
      52             :   struct rusage usage;
      53             :   struct timeval tv;
      54          60 :   gettimeofday(&tv, NULL);
      55          60 :   getrusage(RUSAGE_SELF, &usage);
      56             : 
      57             :   Result r;
      58          60 :   r.wall = time_double(&tv);
      59          60 :   r.user = time_double(&usage.ru_utime);
      60          60 :   r.system = time_double(&usage.ru_stime);
      61          60 :   return r;
      62             : }
      63             : 
      64          24 : Timer::Result Timer::Mark() {
      65          24 :   Result s = Sample();
      66             :   Result r;
      67          24 :   r.wall = s.wall - start_.wall;
      68          24 :   r.user = s.user - start_.user;
      69          24 :   r.system = s.system - start_.system;
      70          24 :   return r;
      71             : }