29 lines
615 B
C++
29 lines
615 B
C++
|
#include "timer.h"
|
||
|
|
|
||
|
|
// Make sure to compile this translation unit with the host compiler and not
|
||
|
|
// nvcc, lest you hit an internal compiler error (ICE) with GCC 10.3.0
|
||
|
|
#include <chrono>
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
std::uint64_t now() {
|
||
|
|
using clock = std::chrono::steady_clock;
|
||
|
|
return std::chrono::duration_cast<std::chrono::nanoseconds>(clock::now().time_since_epoch()).count();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
timer::timer() {
|
||
|
|
t0 = now();
|
||
|
|
}
|
||
|
|
|
||
|
|
double timer::elapsed() const {
|
||
|
|
std::uint64_t t1 = now();
|
||
|
|
return 1.e-9*(t1 - t0);
|
||
|
|
}
|
||
|
|
|
||
|
|
double timer::reset() {
|
||
|
|
std::uint64_t t1 = now();
|
||
|
|
double ans = 1.e-9*(t1 - t0);
|
||
|
|
t0 = t1;
|
||
|
|
return ans;
|
||
|
|
}
|