Add a special background to use for performance testing

Performance testing was producing inconsistent values at different
times in the day since the GNOME default background is animated and
sometimes has a single layer, and sometimes two blended layers.

So we have consistent numbers, install a simple animated background
with GNOME Shell that has 40-year long transition ending in 2030,a
and set an environment variable in gnome-shell-perf-tool so that the
background is override with that background. (The background depends
on files installed by gnome-backgrounds; we assume that the person
running performance tests is doing so within the scope of a full
GNOME install.)

https://bugzilla.gnome.org/show_bug.cgi?id=734610
This commit is contained in:
Owen W. Taylor 2014-08-11 14:35:52 +02:00
parent d450b74e10
commit 20fc9735fa
5 changed files with 67 additions and 13 deletions

View file

@ -0,0 +1,31 @@
<!-- With an animated background, performance will differ depending on whether
one layer or two layers are being blended together. This messes up our
benchmarks. We could just benchmark a single image, but since blended
images are present for much of the day with the GNOME default background,
we want to make sure that also performs well; for that reason we ship
an "animated" background that animates super-slowly to use during
performance tests; it will be in the blended state until 2030. -->
<background>
<starttime>
<year>1990</year>
<month>1</month>
<day>1</day>
<hour>0</hour>
<minute>00</minute>
<second>00</second>
</starttime>
<!-- One transition that takes 40 years -->
<transition type="overlay">
<duration>1261440000.0</duration>
<from>@datadir@/backgrounds/gnome/adwaita-morning.jpg</from>
<to>@datadir@/backgrounds/gnome/adwaita-day.jpg</to>
</transition>
<!-- A single slide doesn't work, so another slide for 1 minute after 40 years -->
<static>
<duration>60</duration>
<file>/usr/share/backgrounds/gnome/Sandstone.jpg</file>
</static>
</background>