Bug#740292: visualboyadvance-gtk: Runs with 100% CPU constantly without need

[Matthew Harvey]

Package: visualboyadvance-gtk
Version: 1.8.0.dfsg-2
Severity: important

Dear Maintainer,

I start playing a game boy colour or game boy advance game (start by running from the application list on gnome3).
The game is now using 100% of the CPU.
I start playing a game using the vba (sdl version) from the command line.
The game is now using about 5-10% CPU.
I do not expect the CPU to be used all the time with the GTK version of the emulator.
I expect the CPU usage to be about the same for either version.

The game and settings used during emulation didn't seem to make a difference. I tried with and without filters, without sound, but all produced the same result.

I tried doing some callgrind evaluation of the performance, but I'm not familiar enough with GTKmm (or callgrind for that matter) to deduce anything. It looks like a lot of CPU time (42% maybe?) is being used within the gtk libraries (callgrind wasn't giving a name).
I also compiled from the debian source, and found the exact same results.

Let me know if there's any other information that I can gather, or even ideas about what I can explore.

Thank-you very much
mattoh


-- System Information:
Debian Release: jessie/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.12-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages visualboyadvance-gtk depends on:
ii  libatkmm-1.6-1       2.22.7-2
ii  libc6                2.17-97
ii  libgcc1              1:4.8.2-16
ii  libglademm-2.4-1c2a  2.6.7-2
ii  libglib2.0-0         2.38.2-5
ii  libglibmm-2.4-1c2a   2.36.2-1
ii  libgtk2.0-0          2.24.22-1
ii  libgtkmm-2.4-1c2a    1:2.24.4-1
ii  libpng12-0           1.2.50-1
ii  libsdl1.2debian      1.2.15-8
ii  libsigc++-2.0-0c2a   2.2.10-0.2
ii  libstdc++6           4.8.2-16
ii  visualboyadvance     1.8.0.dfsg-2
ii  zlib1g               1:1.2.8.dfsg-1

visualboyadvance-gtk recommends no packages.

visualboyadvance-gtk suggests no packages.

-- no debconf information