Re: Raspberry Pi GPU acceleration

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

Recently I testet a current image of NetBSD on the Pi and I had a
quite well impression. The last time I tried, the filesystem got
destroyed after trying to resize it.

However, I identified two things that contribute to a very slow boot process:

-One is postfix, which (I don´t know) may require quite much CPU or
I/O. I think it is only necessary to deliver cron´s / at´s mails and -
for this task - is pretty heavywight.

-Two is devpubd, which seems to invoke several instaces of the MAKEDEV script.

If I disable both of these things, the boot process becomes dramatically faster.

Another thing I noticed is that X (even the mouse pointer) becomes
sluggish when opening huge applications (I suspect this is also a CPU
and/or I/O issue).

The rest is great :)

2015-01-30 12:59 GMT+01:00 Jared McNeill <jmcneill%invisible.ca@localhost>:
> I think at that time DEBUG and maybe LOCKDEBUG were enabled in the kernel.
> No longer the case, and lots of improvements since then. SD card performance
> is pretty good now, considering we don't support UHS-I transfer modes yet:
>
>   undine# dd if=/dev/rld0c of=/dev/null bs=1m count=128
>   128+0 records in
>   128+0 records out
>   134217728 bytes transferred in 7.632 secs (17586180 bytes/sec)
>
>
> On Fri, 30 Jan 2015, Stephan wrote:
>
>> That sounds great. The last time I tried a current NetBSD image on the
>> Raspberri Pi, the overall performance subjectively felt a bit slower
>> compared to Linux; e.g. regarding the boot time or SSH key generation.
>> Though I didn?t perform any kind of benchmark. That was at the time
>> when DMA support for the 2835 was just imported.
>>
>> Are there any benchmarks or known issues in terms of performance with
>> the NetBSD ARM port or 2835 support?
>>
>> 2015-01-30 12:46 GMT+01:00 Jared McNeill <jmcneill%invisible.ca@localhost>:
>>>
>>> The kernel driver is BSD licensed (see src/sys/external/bsd/vchiq) and
>>> source code is available for the userland libaries (EGL, GLES, GLES2,
>>> OpenMAX IL, etc): https://github.com/raspberrypi/userland
>>>
>>> Once vc4 drm and the Mesa support matures, we can look into bringing that
>>> in
>>> at some point as well.
>>>
>>>
>>> On Fri, 30 Jan 2015, Stephan wrote:
>>>
>>>> Hi
>>>>
>>>> How was this achieved? Wasn?t there mainly proprietary (Linux?) bits
>>>> for 3D accelleration? The Mesa driver isn?t yet finished, is it?
>>>>
>>>> 2015-01-30 11:57 GMT+01:00 Jared McNeill <jmcneill%invisible.ca@localhost>:
>>>>>
>>>>>
>>>>> Hi folks --
>>>>>
>>>>> 3D graphics and hardware video decode are now working on the Raspberry
>>>>> Pi
>>>>> More info on the NetBSD blog:
>>>>>
>>>>>   http://blog.netbsd.org/tnf/entry/raspberry_pi_gpu_acceleration_in
>>>>>
>>>>> Anybody want to package XBMC? :)
>>>>>
>>>>> Cheers,
>>>>> Jared
>>>>
>>>>
>>>>
>>>
>>
>