Re: Raspberry Pi GPU acceleration

[Stephan <stephanwib%googlemail.com@localhost>]

Thanks - I´ll try your enhancement soon.

I´ve also performed a lot more testing yesterday. NetBSD is running
very very stable now. The last time I tried, I couldn´t resize the
filesystem and - with a fresh install - the filesystem became
corrupted quickly. I guess that was a bug with the initial DMA
support.

Some findings:

-Video and audio playback work great with omxplayer.

-One can play SDL based games without X on wscons :) SDL is a good
candidate to receive GPU acelleration.

-I downloaded, extracted and built some packages from pkgsrc. That
procedure is horribly slow. There are 3 conditions that can occur:

>One is that the SD card gets 100% busy. Maybe this could be improved with the transfer modes you mentioned?

>Two is that user CPU is at 100% when the compiler works - this might be the natural limit of the processor.

>Three looked familiar to me. Problem is that the SD cards is barely busy, user CPU consumption is near-zero but kernel CPU is at a very high level. I guess it is related to what I metioned here:

http://mail-index.netbsd.org/current-users/2014/08/22/msg025646.html

I saw this happening with the x11-links package for instance.

2015-02-15 17:05 GMT+01:00 Jared McNeill <jmcneill%invisible.ca@localhost>:
> I've checked in a change to devpubd and the hook scripts to only run MAKEDEV
> once at startup, it makes a noticeable difference for me. Can you give it a
> shot?
>
> http://mail-index.netbsd.org/source-changes/2015/02/15/msg063185.html
>
>
>
> On Sun, 15 Feb 2015, Stephan wrote:
>
>>
>> Indeed - adding a nice of 20 helps a lot here.
>>
>> Am 13.02.2015 13:09 schrieb "Jared McNeill" <jmcneill%invisible.ca@localhost>:
>>       Does adding nice to the MAKEDEV call
>>       in /libexec/devpubd-hooks/01-makedev help at all?
>>
>>       On 2015-02-13 7:48:32 AM, Stephan
>>       <stephanwib%googlemail.com@localhost> wrote:
>>
>>       -Two is devpubd, which seems to invoke several instaces of
>>       the MAKEDEV script.
>>
>>
>