[Bug 23085] Radeon KMS: XGetImage very slow, as is Firefox scrolling

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Aug 4 22:23:05 PDT 2009


--- Comment #12 from Joel Feiner <jafeiner at gmail.com>  2009-08-04 22:23:05 PST ---
(In reply to comment #11)
> With Jerome Glisse's patch "radeon/kms: add simple DownloadFromScreen
> implementation" to DDX and Linux kernel 2.6.31-rc5-git3 (contains drm-fixes
> 20090804) ExaGetImage CPU-usage was settles down from approx. 70-75% down to
> approx. 25% (see attached screenshot).
> [1]
> <http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=22074cf0e58fddba743924532625e6fca49b6bdc>

I may give that patch a try.  I saw it come through yesterday (or was it
today?), but I was afraid to try it given Dave Airlie's concerns on the mailing
list about the state of DFS (and UTS) under KMS.

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