[arch-general] regression in nouveau ?

Xavier Chantry chantry.xavier at gmail.com
Wed May 26 17:26:58 EDT 2010

On Wed, May 26, 2010 at 10:46 AM,  <fons at kokkinizita.net> wrote:
> Looking at the xrun statistics in function of audio period size,
> it looks like current nouveau is blocking audio (either by dis-
> abling interrupts, or by locking a shared HW resource) for about
> 3-4 ms. *No* driver today should ever do that - it's really late
> 1990's performance.

As I said, there are some people who are willing to help in that area.
But without people like you reporting and testing, it's never going to
We need audio guys and graphics/drivers guys allocating some times to
work together and resolve the issues.

There was at least one nouveau developer trying to help out :
But the reporter just disappeared.

I just talked to him on IRC #nouveau, here are some extracts :
23:01 < stillunknown> you need someone with the time and the itch to pursue this
23:02 < stillunknown> because the magic solution isn't going to drop
from the sky
23:02 < stillunknown> we can help, but that goes for anyone
23:07 < stillunknown> shining: my first guess is that we disable irq's
in a few code paths
23:14 < stillunknown> my guess is the irq disabling around fences,
since that is the only thing
                      that i suspect will trigger frequently when rendering
23:16 < stillunknown> makes me wonder why we disable irq's there
23:16 < stillunknown> mailinglist time :-)
23:18 < stillunknown> ah for nv04 i can understand, but for the rest not so much

If there is no one to test / experiment, I am afraid the situation
won't improve anytime soon.
And just a reminder that these people help/work for free in their
limited spare time :)

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