join::Rdtsc Class Reference

rdtsc clock policy (invariant TSC, CPU pinning, no NTP slewing). More...

#include <clock.hpp>

Public Types
using	Duration = std::chrono::nanoseconds
using	TimePoint = std::chrono::time_point<NanoClock>
using	Stats = BasicStats<Rdtsc>
template<size_t Capacity, uint64_t TickNs = 100>
using	Wheel = BasicWheel<Rdtsc, SpinPolicy<Rdtsc>, Capacity, TickNs>

Public Member Functions
	Rdtsc ()
	default constructor.

Static Public Member Functions
static bool	invariant () noexcept
	check if the cycle counter is invariant.
static void	calibrate () noexcept
	calibrate against CLOCK_MONOTONIC, or CNTFRQ on ARM.
static TimePoint	now () noexcept
	read the current time, requires calibrate ().

Detailed Description

rdtsc clock policy (invariant TSC, CPU pinning, no NTP slewing).

Member Typedef Documentation

Duration

using join::Rdtsc::Duration = std::chrono::nanoseconds

Stats

using join::Rdtsc::Stats = BasicStats<Rdtsc>

TimePoint

using join::Rdtsc::TimePoint = std::chrono::time_point<NanoClock>

Wheel

template<size_t Capacity, uint64_t TickNs = 100>

using join::Rdtsc::Wheel = BasicWheel<Rdtsc, SpinPolicy<Rdtsc>, Capacity, TickNs>

Constructor & Destructor Documentation

Rdtsc()

join::Rdtsc::Rdtsc ( )

inline

default constructor.

Exceptions

std::runtime_error

if the cycle counter is not invariant.

Member Function Documentation

calibrate()

static void join::Rdtsc::calibrate ( )

inlinestaticnoexcept

calibrate against CLOCK_MONOTONIC, or CNTFRQ on ARM.

invariant()

static bool join::Rdtsc::invariant ( )

inlinestaticnoexcept

check if the cycle counter is invariant.

Returns

true if invariant.

now()

static TimePoint join::Rdtsc::now ( )

inlinestaticnoexcept

read the current time, requires calibrate ().

Returns

current time, zero if uncalibrated.

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The documentation for this class was generated from the following file:

• core/include/join/clock.hpp