fastmm::TscCalibration Struct Reference

#include <fastmm/core/time.hpp>

Public Member Functions
constexpr bool	has_rate () const noexcept

Public Attributes
std::uint64_t	tsc0 = 0
	TSC reading at the anchor.
std::int64_t	ns0 = 0
	wall time at the anchor
std::uint64_t	ns_per_cycle_q32 = 0
	32.32 fixed point; 0: no TSC rate
double	ghz = 0.0
	diagnostics only
bool	use_tsc = false
	Wall time from the TSC.

Member Function Documentation

has_rate()

constexpr bool fastmm::TscCalibration::has_rate ( ) const

inlineconstexprnoexcept

Member Data Documentation

tsc0

std::uint64_t fastmm::TscCalibration::tsc0 = 0

TSC reading at the anchor.

ns0

std::int64_t fastmm::TscCalibration::ns0 = 0

wall time at the anchor

ns_per_cycle_q32

std::uint64_t fastmm::TscCalibration::ns_per_cycle_q32 = 0

32.32 fixed point; 0: no TSC rate

ghz

double fastmm::TscCalibration::ghz = 0.0

diagnostics only

use_tsc

bool fastmm::TscCalibration::use_tsc = false

Wall time from the TSC.

False with a non-zero rate (TscKind::Constant): wall time from clock_gettime, TSC cycle intervals still convert with the rate.