Details
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Bug
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Resolution: Invalid
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Not Evaluated
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None
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6.5.2
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None
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macOS
Description
I just enabled output for all Qt warnings in my app (QT_LOGGING_RULES="*.warning=true"),
in order to collect more info for QTBUG-108175 and some other issues.
After that I started to notice new warnings on the app start, like so
main thread missed 13 update(s) from display link during update request delivery
It's printed on QCocoaScreen::deliverUpdateRequests().
...
if (pauseUpdates) {
// Pause the display link if there are no pending update requests
qCDebug(lcQpaScreenUpdates) << "Stopping display link for" << this;
CVDisplayLinkStop(m_displayLink);
}
if (const int missedUpdates = m_pendingUpdates.fetchAndStoreRelaxed(0) - pendingUpdates) {
qCWarning(lcQpaScreenUpdates) << "main thread missed" << missedUpdates
<< "update(s) from display link during update request delivery";
}
...