QcTickStats Class

Timing of the server ticks: how long they ran, how late they started against their due time on the tick grid (QcTickScheduler), and how many were skipped. More...

Header: #include <server/tick/QcTickStats.h>

List of all members, including inherited members

Public Types

Summary

Public Functions

void	addPhases(const std::array<qint64, QcTickPhases::count> &phaseNs)
void	addSkipped(quint64 count)
void	record(qint64 lateNs, qint64 durationNs)
void	reset()
quint64	skipped() const
QcTickStats::Summary	summary() const

Static Public Members

const qsizetype maxSamples

Detailed Description

Written by the server thread, read and reset by others (benchmark); every access takes the mutex.

Member Type Documentation

`[alias]` QcTickStats::Summary

The summary of the ticks so far.

Member Function Documentation

void QcTickStats::addPhases(const std::array<qint64, QcTickPhases::count> &phaseNs)

Adds phaseNs, the nanoseconds per phase of one tick (QcTickPhaseTimer::lastTick).

void QcTickStats::addSkipped(quint64 count)

Counts count ticks dropped from a backlog.

void QcTickStats::record(qint64 lateNs, qint64 durationNs)

Records a tick that started lateNs after it was due and ran for durationNs.

void QcTickStats::reset()

Forgets everything recorded.

quint64 QcTickStats::skipped() const

Returns the ticks dropped so far (cheap, unlike summary()).

QcTickStats::Summary QcTickStats::summary() const

Returns the summary of the ticks recorded since the last reset.

Member Variable Documentation

const qsizetype QcTickStats::maxSamples

Lateness samples kept for the percentile (the latest ones; about 55 minutes of ticks).

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