<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - KDE Konsole very slow scrolling with TearFree and QT graphics system native" href="https://bugs.freedesktop.org/show_bug.cgi?id=77436#c141">Comment # 141</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - KDE Konsole very slow scrolling with TearFree and QT graphics system native" href="https://bugs.freedesktop.org/show_bug.cgi?id=77436">bug 77436</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>I've restored the throttling and tried to compromise to not over-throttle during allocations: commit ca0d06add926eb17fcec6c031adabb656498d744 Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Date: Wed Jun 25 14:19:33 2014 +0100 sna: Improve throttling during bo allocation By controlling how long we may block during buffer allocation, we can relax the throttle elsewhere to prevent render lag buildup. References: <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - KDE Konsole very slow scrolling with TearFree and QT graphics system native" href="show_bug.cgi?id=77436">https://bugs.freedesktop.org/show_bug.cgi?id=77436</a> Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>> Can you please check that prevents the lag buildup on both TearFree and non-TearFree setups? Due to the well flips are scheduled in TearFree there can easily be a 20ms delay between render and seeing the results, at best 16ms. That should be enough to make non-TearFree feel snappier. To improve, I would need to submit the next frame just before the vblank to minimise the render output latency. The current solution is nice for its simplicity. :)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>