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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 <fstream>
#include <sstream>
#include <string>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include <sys/resource.h>
#include <sys/time.h>
UsageTimer::UsageTimer() : start_(Sample()) {}
double UsageTimer::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;
}
static void get_cpu_usage(unsigned long long* total_cpu_time,
unsigned long long* idle_cpu_time) {
#ifdef __linux__
std::ifstream proc_stat("/proc/stat");
proc_stat.ignore(5);
std::string cpu_time_str;
std::string first_line;
std::getline(proc_stat, first_line);
std::stringstream first_line_s(first_line);
for (int i = 0; i < 10; ++i) {
std::getline(first_line_s, cpu_time_str, ' ');
*total_cpu_time += std::stol(cpu_time_str);
if (i == 3) {
*idle_cpu_time = std::stol(cpu_time_str);
}
}
#else
gpr_log(GPR_INFO, "get_cpu_usage(): Non-linux platform is not supported.");
#endif
}
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);
r.total_cpu_time = 0;
r.idle_cpu_time = 0;
get_cpu_usage(&r.total_cpu_time, &r.idle_cpu_time);
return r;
}
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;
r.total_cpu_time = s.total_cpu_time - start_.total_cpu_time;
r.idle_cpu_time = s.idle_cpu_time - start_.idle_cpu_time;
return r;
}
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