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Working getrusage and wall clock metrics

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This commit is contained in:
flamingcow
2019-05-10 23:04:26 -07:00
parent 187585d02c
commit 13553e1a07
5 changed files with 95 additions and 6 deletions
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53
usage.cc
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@@ -1,9 +1,58 @@
#include <glog/logging.h>
#include <iomanip>
#include "usage.h"
namespace fireusage {
UsageTracker::UsageTracker(const std::string_view& plural_resource_name)
: plural_resource_name_(plural_resource_name) {
namespace {
std::chrono::nanoseconds TvToNs(const timeval& tv) {
return std::chrono::seconds(tv.tv_sec) + std::chrono::microseconds(tv.tv_usec);
}
} // namespace
void UsageTracker::AddEvents(uint64_t num) {
events_ += num;
}
void UsageTracker::AddEvent() {
events_ += 1;
}
void UsageTracker::Start() {
CHECK(!running_);
running_ = true;
PCHECK(getrusage(RUSAGE_THREAD, &start_usage_) == 0);
start_time_ = std::chrono::steady_clock::now();
}
void UsageTracker::Stop() {
CHECK(running_);
running_ = false;
const auto end_time_ = std::chrono::steady_clock::now();
rusage end_usage_;
PCHECK(getrusage(RUSAGE_THREAD, &end_usage_) == 0);
wall_time_ += end_time_ - start_time_;
user_time_ += TvToNs(end_usage_.ru_utime) - TvToNs(start_usage_.ru_utime);
sys_time_ += TvToNs(end_usage_.ru_stime) - TvToNs(start_usage_.ru_stime);
}
void UsageTracker::Log() {
LOG(INFO) << "usage:";
LOG(INFO) << "\tevents: " << std::setw(20) << std::setfill(' ') << events_;
LOG(INFO) << "\twall time: " << std::setw(20) << std::setfill(' ') << wall_time_.count() << "ns";
LOG(INFO) << "\tuser time: " << std::setw(20) << std::setfill(' ') << user_time_.count() << "ns";
LOG(INFO) << "\tsys time: " << std::setw(20) << std::setfill(' ') << sys_time_.count() << "ns";
LOG(INFO) << "\twall time / event: " << std::setw(20) << std::setfill(' ') << (wall_time_ / events_).count() << "ns";
LOG(INFO) << "\tuser time / event: " << std::setw(20) << std::setfill(' ') << (user_time_ / events_).count() << "ns";
LOG(INFO) << "\tsys time / event: " << std::setw(20) << std::setfill(' ') << (sys_time_ / events_).count() << "ns";
}
} // namespace fireusage