timing.h File Reference

High-resolution, low-cost timing routines. More...

#include "./api.h"
#include "./defines.h"
#include "./inttypes.h"
#include <algorithm>
#include <atomic>
#include <iterator>
#include <numeric>

Go to the source code of this file.

Classes
struct	pxr::ArchIntervalTimer
	A simple timer class for measuring an interval of time using the ArchTickTimer facilities. More...

Namespaces
namespace	pxr

Functions
uint64_t	pxr::ArchGetTickTime ()
	Return the current time in system-dependent units.
uint64_t	pxr::ArchGetStartTickTime ()
	Get a "start" tick time for measuring an interval of time, followed by a later call to ArchGetStopTickTime().
uint64_t	pxr::ArchGetStopTickTime ()
	Get a "stop" tick time for measuring an interval of time.
ARCH_API uint64_t	pxr::ArchGetTickQuantum ()
	Return the tick time resolution.
ARCH_API uint64_t	pxr::ArchGetIntervalTimerTickOverhead ()
	Return the ticks taken to record an interval of time with ArchIntervalTimer, as measured at startup time.
ARCH_API int64_t	pxr::ArchTicksToNanoseconds (uint64_t nTicks)
	Convert a duration measured in "ticks", as returned by ArchGetTickTime(), to nanoseconds.
ARCH_API double	pxr::ArchTicksToSeconds (uint64_t nTicks)
	Convert a duration measured in "ticks", as returned by ArchGetTickTime(), to seconds.
ARCH_API uint64_t	pxr::ArchSecondsToTicks (double seconds)
	Convert a duration in seconds to "ticks", as returned by ArchGetTickTime().
ARCH_API double	pxr::ArchGetNanosecondsPerTick ()
	Get nanoseconds per tick.
ARCH_API uint64_t	pxr::Arch_MeasureExecutionTime (uint64_t maxTicks, bool *reachedConsensus, void const *m, uint64_t(*callM)(void const *, int))
template<class Fn >
uint64_t	pxr::ArchMeasureExecutionTime (Fn const &fn, uint64_t maxTicks=1e7, bool *reachedConsensus=nullptr)
	Run fn repeatedly attempting to determine a consensus fastest execution time with low noise, for up to maxTicks, then return the consensus fastest execution time.

Detailed Description

High-resolution, low-cost timing routines.