You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
// Copyright 2019 Roman Perepelitsa.
|
|
//
|
|
// This file is part of GitStatus.
|
|
//
|
|
// GitStatus is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// GitStatus is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with GitStatus. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
#include "timer.h"
|
|
|
|
#include <sys/resource.h>
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
|
|
#include <cmath>
|
|
#include <limits>
|
|
|
|
#include "check.h"
|
|
#include "logging.h"
|
|
|
|
namespace gitstatus {
|
|
|
|
namespace {
|
|
|
|
double CpuTimeMs() {
|
|
auto ToMs = [](const timeval& tv) { return 1e3 * tv.tv_sec + 1e-3 * tv.tv_usec; };
|
|
rusage usage = {};
|
|
CHECK(getrusage(RUSAGE_SELF, &usage) == 0) << Errno();
|
|
return ToMs(usage.ru_utime) + ToMs(usage.ru_stime);
|
|
}
|
|
|
|
double WallTimeMs() {
|
|
// An attempt to call clock_gettime on an ancient version of MacOS fails at runtime.
|
|
// It's possible to detect the presence of clock_gettime at runtime but I don't have
|
|
// an ancient MacOS to test the code. Hence this.
|
|
#ifdef __APPLE__
|
|
return std::numeric_limits<double>::quiet_NaN();
|
|
#else
|
|
struct timespec ts;
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
return 1e3 * ts.tv_sec + 1e-6 * ts.tv_nsec;
|
|
#endif
|
|
}
|
|
|
|
} // namespace
|
|
|
|
void Timer::Start() {
|
|
cpu_ = CpuTimeMs();
|
|
wall_ = WallTimeMs();
|
|
}
|
|
|
|
void Timer::Report(const char* msg) {
|
|
double cpu = CpuTimeMs() - cpu_;
|
|
if (std::isnan(wall_)) {
|
|
LOG(INFO) << "Timing for: " << msg << ": " << cpu << "ms cpu";
|
|
} else {
|
|
double wall = WallTimeMs() - wall_;
|
|
LOG(INFO) << "Timing for: " << msg << ": " << cpu << "ms cpu, " << wall << "ms wall";
|
|
}
|
|
Start();
|
|
}
|
|
|
|
} // namespace gitstatus
|