On 12/13/2011 05:07 PM, Jerome Glisse wrote:
On Mon, Dec 12, 2011 at 03:09:26PM -0500, Konrad Rzeszutek Wilk wrote:
Jerome pointed me to some accounting error in the DMA API debugging code and
while I can't figure it out yet, I did notice some extreme slowness - which
is due to the nouveau driver calling the unpopulate (now that unbind +
unpopulate are squashed) quite a lot (this is using Gnome Shell - I think GNOME2
did not have those issues but I can't recall).
Anyhow these patches fix the 50% perf regression I saw and also some minor bugs
that I noticed.
Gonna review those today and test them.
Cheers,
Jerome
Hi!
I'm not whether any drivers are still using the AGP backend?
Calling unpopulate / (previous clear) each time unbind is done should be
quite
inefficient with that one, as AGP sets up its own data structures and
copies page tables
on each populate. That should really be avoided unless there is a good
reason to have it.
/Thomas
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