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Use rdtsc in Timers

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This commit is contained in:
Matthias Hochsteger 2019-10-01 13:18:24 +02:00
parent 78094016bf
commit e99db57b03
4 changed files with 9 additions and 9 deletions
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6
libsrc/core/paje_trace.cpp
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@ -98,7 +98,7 @@ namespace ngcore
// return time in milliseconds as double // return time in milliseconds as double
// return std::chrono::duration<double>(t-start_time).count()*1000.0; // return std::chrono::duration<double>(t-start_time).count()*1000.0;
// return std::chrono::duration<double>(t-start_time).count() / 2.7e3; // return std::chrono::duration<double>(t-start_time).count() / 2.7e3;
return 1000.0*static_cast<double>(t-start_time) / ticks_per_second; return 1000.0*static_cast<double>(t-start_time) * seconds_per_tick;
} }
enum PType enum PType
@ -629,7 +629,7 @@ namespace ngcore
std::sort (events.begin(), events.end()); std::sort (events.begin(), events.end());
root.time = 1000.0*static_cast<double>(stop_time-start_time)/ticks_per_second; root.time = 1000.0*static_cast<double>(stop_time-start_time) * seconds_per_tick;
for(auto & event : events) for(auto & event : events)
{ {
@ -658,7 +658,7 @@ namespace ngcore
std::cout << "node stack empty!" << std::endl; std::cout << "node stack empty!" << std::endl;
break; break;
} }
double time = 1000.0*static_cast<double>(event.time-current->start_time)/ticks_per_second; double time = 1000.0*static_cast<double>(event.time-current->start_time) * seconds_per_tick;
current->time += time; current->time += time;
current = node_stack.back(); current = node_stack.back();
current->time -= time; current->time -= time;

6
libsrc/core/profiler.hpp
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@ -22,7 +22,7 @@ namespace ngcore
TimerVal() = default; TimerVal() = default;
double tottime = 0.0; double tottime = 0.0;
double starttime = 0.0; TTimePoint starttime=0;
double flops = 0.0; double flops = 0.0;
double loads = 0.0; double loads = 0.0;
double stores = 0.0; double stores = 0.0;
@ -61,13 +61,13 @@ namespace ngcore
/// start timer of index nr /// start timer of index nr
static void StartTimer (int nr) static void StartTimer (int nr)
{ {
timers[nr].starttime = WallTime(); timers[nr].count++; timers[nr].starttime = GetTimeCounter(); timers[nr].count++;
} }
/// stop timer of index nr /// stop timer of index nr
static void StopTimer (int nr) static void StopTimer (int nr)
{ {
timers[nr].tottime += WallTime()-timers[nr].starttime; timers[nr].tottime += (GetTimeCounter()-timers[nr].starttime)*seconds_per_tick;
} }
static void StartThreadTimer (size_t nr, size_t tid) static void StartThreadTimer (size_t nr, size_t tid)

4
libsrc/core/utils.cpp
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@ -21,7 +21,7 @@ namespace ngcore
&status); } &status); }
#endif #endif
double ticks_per_second = [] () noexcept double seconds_per_tick = [] () noexcept
{ {
auto tick_start = GetTimeCounter(); auto tick_start = GetTimeCounter();
double tstart = WallTime(); double tstart = WallTime();
@ -33,7 +33,7 @@ namespace ngcore
auto tick_end = GetTimeCounter(); auto tick_end = GetTimeCounter();
tend = WallTime(); tend = WallTime();
return static_cast<double>(tick_end-tick_start)/(tend-tstart); return (tend-tstart)/static_cast<double>(tick_end-tick_start);
}(); }();
const std::chrono::time_point<TClock> wall_time_start = TClock::now(); const std::chrono::time_point<TClock> wall_time_start = TClock::now();

2
libsrc/core/utils.hpp
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@ -44,7 +44,7 @@ namespace ngcore
// High precision clock counter register // High precision clock counter register
using TTimePoint = size_t; using TTimePoint = size_t;
extern NGCORE_API double ticks_per_second; extern NGCORE_API double seconds_per_tick;
inline TTimePoint GetTimeCounter() noexcept inline TTimePoint GetTimeCounter() noexcept
{ {