<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Double tap not always recognized" href="https://bugs.freedesktop.org/show_bug.cgi?id=90172#c21">Comment # 21</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - Double tap not always recognized" href="https://bugs.freedesktop.org/show_bug.cgi?id=90172">bug 90172</a> from <a class="email" href="mailto:peter.hutterer@who-t.net" title="Peter Hutterer <peter.hutterer@who-t.net>"> Peter Hutterer</a> <pre>hard to be sure without profiling, but what I speculate is: input events and the timerfd are both epoll sources in libinput. but input events are read in a loop to pull all of them off the device, which can potentially starve the timerfd. i.e. while the device keeps producing events as fast as we process them, we never check the timerfd for timeouts and thus go past the allotted time. the event processing doesn't double-check if the event time is newer than a previously scheduled timer (it should, feel free to file a bug for this) so we process an event that comes in late as within the timeout - simply because we haven't checked the timeout yet.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>