Slow 2D with radeon KMS
mailings.xorg at mirabel-sil.com
Tue Feb 16 10:56:11 PST 2010
> That's it ! Thanks !
> I have the feeling that OSS radeon/EXA have never been improving so fast.
> Cheers from a happy end-user !
After my recent discoveries about KMS, I've got a few questions about what
KMS actually brings...
I read some time ago that the performance drawbacks sometimes associated
with EXA were related to the way EXA handles memory / migration. Am I
Personally, until now I always experienced better performance with
migrationheuristic=greedy, especially when switching windows/desktop in a
This either with an old Xpress 200M or with a new HD4650.
Is KMS supposed to bring improvements about this ? For example by taking
advantage of the kernel capabilities to handle memory ? Is it related to
TTM or GEM ? What about the "unmappable" VRAM above 265M ?
Is migrationheuristic=always now supposed to be the best performing setting ?
Thanks in advance for the answers !
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