In bug 930793 I took the rather extreme approach to process only one native event per gecko event. But as bug 961869 for example shows, that was a bit too much. Instead of bringing back max 20ms processing, the patch gives max 10ms. (pushed from a bit old tree) https://tbpl.mozilla.org/?tree=Try&rev=25da36e626c7 https://tbpl.mozilla.org/?tree=Try&rev=a1fdcbb35dd2 (pushed from up-to-data) https://tbpl.mozilla.org/?tree=Try&rev=72e57f6b02f2 Based on try the patch seems to work rather well. tp doesn't seem to regress. The old code was http://mxr.mozilla.org/mozilla-aurora/source/widget/xpwidgets/nsBaseAppShell.cpp?mark=254-254,275-278#253 (apparently roc is on vacation, so perhaps you avih can review this partial backout.)

Comment on attachment 8364098 [details] [diff] [review] more_native_events.diff Review of attachment 8364098 [details] [diff] [review]: ----------------------------------------------------------------- Good move. This is closer to how native events were processed before bug 930793 landed, but still without the starvation. /me likes.

Backed out for making B2G reftests much more failure prone. R1 and R5 were near perma-fail after this landed. It's worth noting that the R1 failures are almost all on file, so it's probably exacerbating a preexisting timing issue. https://hg.mozilla.org/integration/mozilla-inbound/rev/93440685551d https://tbpl.mozilla.org/php/getParsedLog.php?id=33461914&tree=Mozilla-Inbound https://tbpl.mozilla.org/php/getParsedLog.php?id=33461884&tree=Mozilla-Inbound

Bah. Tryserver push with limit 20, which is the old value. https://tbpl.mozilla.org/?tree=Try&rev=ddf67ad3fae6

In general, it appears to just have made B2G tests more failure-prone. More examples: https://tbpl.mozilla.org/php/getParsedLog.php?id=33467269&tree=Mozilla-Inbound https://tbpl.mozilla.org/php/getParsedLog.php?id=33466936&tree=Mozilla-Inbound

But I need to now test whether 20ms causes other regressions. I thought it did...

looks like the fractal demo is still ok with 20ms.

Confirmed that B2G is a lot more green post-backout.

Nice, 20ms fails too. And I think wrapper.html is just broken. ...fixing another test.