<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Shared Memory queuing up in xlib backend for slow X Server 1.9.5" href="https://bugs.freedesktop.org/show_bug.cgi?id=75524#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Shared Memory queuing up in xlib backend for slow X Server 1.9.5" href="https://bugs.freedesktop.org/show_bug.cgi?id=75524">bug 75524</a> from <a class="email" href="mailto:kasberger@heidenhain.de" title="kasberger@heidenhain.de">kasberger@heidenhain.de</a> <pre>(In reply to <a href="show_bug.cgi?id=75524#c5">comment #5</a>) > My point is that the client is pushing data faster than the Xserver can > render it, so the client is building up a massive output latency. It tends > to cause very annoying lag. However, how to close that feedback loop is not > obvious and may require an extra interface in cairo (something like > cairo_device_throttle). Yes, I agree. But if a client should do active throtteling means the client needs two things a) intelligence when throtteling is useful. How to measure the speed of a xserver? b) intelligence how to throttle down What about a kind of callback each time called when the cairo xlib backend allocates/deallocate a shared memory arena? For the client it would be a good hint there is something strange with xserver Or can you think for other measuremnt parameters indicating a a xserver load ? Oh I think I am too directly attached to my problem. What about cairo_device_throttle_strategy(..) e.g. with NONE (=old behavior), COWARD (=try to get in sync with xserver every time), BEST (=sync if really needed) ? Maybe second solution would be much better. What do you think?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>