On 02/26/2013 01:11 AM, Paul wrote:
>
> Here is a first port for OLINUXINO A13 board.
>
> http://www.crubille.lautre.net/xenomai_sun5i/ipipe-linuxsun5i-3.4.24.beta.patch
>
> and apply the standart xenomai-2.6.2.1 procedure on a sunxi linux kernel
> from :
> "git clone git://github.com/linux-sunxi/linux-sunxi.git -b sunxi-3.4"
Hi,
good news the I-pipe patch for ARM is ported to yet another board! If
you wish the patch to be distributed with Xenomai, please generate a
-pre and -post patches.
If you generate pre and post patches, we can update the I-pipe patch
with your pre and post patches remaining valid. If you do otherwise,
your patch will bitrot fast.
Since I have been talking about it so many times, I guess we should
provide a script to generate the -pre and -post patches.
>
> I think that the A10/A13 port in the official linux tree is still too
> unstable to port on it.
>
>
> The patch is a basic but functionnal version. I attempt to use priority
> interrupt, but go in trouble.
> If i can have comments about this point?
Probably not much more than what you can find in the porting guide.
>
> If somebody is interested in it for A10, it is very easy to adapt, and i
> can do it and send the patch.
>
> Paul Crubillé
>
> ---------------------------------------------------------------------------------------------------
>
> Running it, i get
>
>
> latency -t 2 -p 100
> == Sampling period: 100 us
> == Test mode: in-kernel timer handler
> == All results in microseconds
> RTT| 00:00:01 (in-kernel timer handler, 100 us period, priority 99)
> RTH|----lat min|----lat avg|----lat max|-overrun|---msw|---lat
> best|--lat worst
> RTD| 5.583| 6.265| 11.167| 0| 0| 5.583|
> 11.167
> RTD| 6.125| 6.258| 10.917| 0| 0| 5.583|
> 11.167
> RTD| 5.500| 6.270| 12.000| 0| 0| 5.500|
> 12.000
>
>
> "lat worst" is mostly under 20 us but can go up for 30 ns.
>
> latency -p 100
> == Sampling period: 100 us
> == Test mode: periodic user-mode task
> == All results in microseconds
> warming up...
> RTT| 00:00:01 (periodic user-mode task, 100 us period, priority 99)
> RTH|----lat min|----lat avg|----lat max|-overrun|---msw|---lat
> best|--lat worst
> RTD| 11.999| 12.708| 21.333| 0| 0| 11.999|
> 21.333
> RTD| 12.624| 12.791| 21.541| 0| 0| 11.999|
> 21.541
> RTD| 12.458| 12.791| 26.458| 0| 0| 11.999|
> 26.458
>
> "lat worst" is mostly under 40 us but can go up for 80 ns.
Tests done without load are meaningless, try xeno-test or dohell.
--
Gilles.
_______________________________________________
Xenomai mailing list
[email protected]
http://www.xenomai.org/mailman/listinfo/xenomai
