Re: [Xenomai] User Space Problems

[Bruno Tunes de Mello <bruno_v05_2005@yahoo.com.br>]

Hi Gilles,

You are right, in the first test, I executed both latency and xeno-test commands. Sorry.
The others test I executed only latency command.

I tried to enable the discard service on /etc/inetd.conf, I don't know if I did it right, but in /etc/services file I found 'discard 9/tcp sink null' and 'discard 9/udp sink null'.
Then I used the command you said:
xeno-test -l "dohell -s 192.168.0.5 -m /media/linaro/PENDRIVE -l /opt/ltp" -c 0 -p 100 -g histo

I tested a few times and the better result is: http://pt-br.tinypic.com/r/206mmvn/8
This result is not so good like that you showed.

My doubt is if this result is satisfactory (the platform is ready for develop applications) or do you think that I need to do some correction?

Thanks, 
Bruno





Em Segunda-feira, 3 de Março de 2014 15:45, Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> escreveu:
 
On 03/03/2014 07:32 PM, Bruno Tunes de Mello wrote:
> Hi Gilles,
> 
> I did the tests you said to verify the system's behavior with load .
> 
> I executed some tests using commands 'stress', cpuburn for Cortex A8 and dohell with LTP, for more than 20 minutes each one.
> I printed 3 results using some of these tools together: http://pastebin.com/VFavnaxW
> In each test it's indicated the commands used to generate load.
> 
> It's just to confirm if it's all right.

71us may be a bit high, but have you run xeno-test and latency at the 
same time? xeno-test runs latency, so, if you also run the latency test 
separately, one latency test will perturb the results of the other.

Also, something I noted on omap4, I have no explanation, but it seems 
latency is better on cpu 0, also, running dohell with all the options 
should provide a harder load.

I use:
xeno-test -l "dohell -s 192.168.0.5 -m /mnt -l /ltp" -c 0 -p 100 -g histo

Where 192.168.0.5 has the "discard" service enabled in inetd.conf (the 
discard service is not enabled by default).

And an USB key is mounted on /mnt.

The generated "histo" files can be used with scripts/histo.gp to generate
histograms like:
http://sisyphus.hd.free.fr/~gilles/core-3.10-latencies/panda.png

Note that since the feedback from mx6 users about the L2 "write-allocate" 
bit, the panda board latency dropped down to about 25us.


-- 
                                                                Gilles.