touch-packages team mailing list archive

[Timo Jyrinki <timo.jyrinki@xxxxxxxxxxxxx>]

I can't seem to reproduce this on mako with just running calendar app
and smemstat:ing it:

---
root@ubuntu-phablet:~# smemstat -p 3347 60
Change in memory (average per second):
  PID       Swap       USS       PSS       RSS User       Command
  3347     0.0 B  1228.8 B  2133.3 B  1501.9 B phablet    /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene
Total:     0.0 B  1228.8 B  2133.3 B  1501.9 B

  PID       Swap       USS       PSS       RSS User       Command
Total:     0.0 B     0.0 B     0.0 B     0.0 B

  PID       Swap       USS       PSS       RSS User       Command
Total:     0.0 B     0.0 B     0.0 B     0.0 B
---

What I did I booted (mako rtm 22 image), launched calendar app and let
it be idle. I also tried waking up the device, putting the app to
background and waiting. The biggest I could get after the initial start
of the app was:

  PID       Swap       USS       PSS       RSS User       Command
  3347     0.0 B    68.3 B    85.3 B   136.5 B phablet    /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene
Total:     0.0 B    68.3 B    85.3 B   136.5 B

...when I switched it to background, after that 0 again. This was a 10
minute test.

If you can reliably reproduce the leaking, could you try using the
instructions at https://wiki.ubuntu.com/Touch/QtTesting and try out Qt
5.3.1?

I searched through the 5.3.x point release git logs, and while there are
a couple of leak fixes, there weren't any that would sound like
happening when doing nothing. The most probable upstream source branches
possibly containing fixes are the '5.3' ones (or '5.3.2' is currently as
good) https://qt.gitorious.org/qt/qtbase/ and
https://qt.gitorious.org/qt/qtdeclarative/, although note that the known
leak we're hitting in bug #1201116 is in
https://qt.gitorious.org/qt/qtxmlpatterns/ instead.

-- 
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src in Ubuntu.
https://bugs.launchpad.net/bugs/1364404

Title:
  qmlscene is leaking ~1.7K per second on an idle application on the
  phone

Status in “qtdeclarative-opensource-src” package in Ubuntu:
  New

Bug description:
  Running apps on the phone using qmlscene and just keeping *idle* one
  can see ~1.7K per second of heap growth.  I monitored qmlscene for
  ~570 minutes and observed 58156K of anonymous mapped memory (normally
  this is heap) growth.

  Running smemstat on qmlscene, for example, an idle calendar app:

  ps -ax | grep calendar.qml | grep -v grep
  14006 ?        Ssl    8:26 /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene calendar.qml

  smemstat -p 14006 60
  Change in memory (average per second):
    PID       Swap       USS       PSS       RSS User       Command
   14006     0.0 B  1706.7 B  1706.7 B  1706.7 B phablet    /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene
  Total:     0.0 B  1706.7 B  1706.7 B  1706.7 B

  ...etc

  This seems to be a similar leak rate to bug 1364380 so it may be a
  common library that is the root of the problem.

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