[gstreamer-bugs] [Bug 636562] SSE misalignment removal in "audioresample"

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=636562
  GStreamer | gst-plugins-base | 0.10.30

--- Comment #1 from lisayueyue at gmail.com 2010-12-06 05:49:38 UTC ---
Created an attachment (id=175904)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=175904)
prototype (optimization) code to remove SSE misalignment

Yongnian tried to write several prototype functions to remove SSE misalignment
for one
function. Using the best prototype and after enabling SSE, the overhead is
reduced by 0.6x; system CPU utilization and C0 percentage (power) is reduced as
well.  
|-----------|--------------------------|------------|--------------|
| prototype | hot function overhead    | CPU util%  | C0 percentage|
|-----------|--------------------------|------------|--------------|
|  No.2     | 69.60%->26.29% (0.4x)    |12.6%->9.6% |   8.5%->7.6% |
|-----------|--------------------------|------------|--------------|

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