And based on John's earlier remark, ie that the same HW and drivers do perform properly with another OS, then it means that Ubuntu components between apps and driver/HW are introducing that extra 20/40ms delay. Mir? Unity8? Something else?
On Tue, Apr 19, 2016 at 8:47 PM, Chris Coulson <chrisccoul...@ubuntu.com> wrote: > The main reason Oxide is slow is because the browser's UI thread is > being blocked for long periods of time due to an issue *outside* of > Oxide. > > As a quick test, I just ran the address book app with > QSG_RENDER_TIMING=1, and it demonstrates exactly the same issue as the > browser - the render thread regularly being blocked for over 20ms and > sometimes up to 40ms in eglSwapBuffers, which causes the UI thread to be > blocked, eg: > > qt.scenegraph.time.renderloop: Frame rendered with 'threaded' renderloop > in 41ms, sync=0, render=5, swap=35 - (on render thread) > qt.scenegraph.time.renderloop: Frame prepared with 'threaded' renderloop, > polish=0, lock=0, blockedForSync=36, animations=0 - (on Gui thread) > QQuickView(0x385ef0) > > Scrolling in address book app is also very janky (like with every other > app and the shell on my M10). I'm not the only person seeing this, am I? > > -- > You received this bug notification because you are a bug assignee. > https://bugs.launchpad.net/bugs/1550371 > > Title: > Webbrowser slow scroll and artifact rendering on freiza > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/canonical-devices-system-image/+bug/1550371/+subscriptions > ** Also affects: mir Importance: Undecided Status: New ** Also affects: unity8 (Ubuntu) Importance: Undecided Status: New ** Changed in: webbrowser-app (Ubuntu) Assignee: Olivier Tilloy (osomon) => (unassigned) ** Changed in: canonical-devices-system-image Assignee: David Barth (dbarth) => kevin gunn (kgunn72) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to webbrowser-app in Ubuntu. https://bugs.launchpad.net/bugs/1550371 Title: Webbrowser slow scroll and artifact rendering on freiza Status in Canonical System Image: Confirmed Status in Mir: New Status in Oxide: Invalid Status in unity8 package in Ubuntu: New Status in webbrowser-app package in Ubuntu: Invalid Bug description: Copied from private avila bug: https://bugs.launchpad.net/avila-private/+bug/1547569 STEPS: 1. Install the latest image 2. Open the browser 3. Goto ubuntu.com 4. Wait for the page to load 5. Scroll the page EXPECT Smooth scrolling and rendering as seen on arale and krillin ACTUAL: Very slow render time on most site with a lot of content Scrolling is glitchy and seems to want to fresh render each page as it is scrolled This is most prominently seen on ubuntu.com but also ebay and amazon webapps. Webbrowser seems to display the issue the most although I beleive it is more likely to be the graphics stack somewhere, tvoss believe that perfservice will hopefully solve the issue. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1550371/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
