ProcPutImage calls exaDoMoveOutPixmap, 4x slowdown
linuxhippy at gmail.com
Tue Oct 14 07:02:37 PDT 2008
I've a use-case where the client uploads 32x32 A8 images to an
256x256x8 pixmap which is later used as mask in a composition
The test-case is able to render with 40fps on xserver-1.3/intel-2.1.1
however with the latest GIT of both I only get ~10-15fps.
Unfourtunatly I've not been able to create a stand-alone testcase
which triggers this problem :-/
Using sysprof I can see a lot of time is spent moving data arround,
very strange is that PutImage seems to cause a readback:
In Composite I see the re-uploading again.
Any idea why ProcPutImage could to fallback (there's plenty of free vram)?
Are there tools / settings which could help me to identify the problem?
Thank you in advance, Clemens
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