From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 17 Feb 2006 09:17:07 +0100
From: Philippe Gerum <rpm@xenomai.org>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] no-brainer realtime issue
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To: Steven Seeger <steve@domain.hid>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>

Steven Seeger wrote:
>>Which framebuffer support did you select at kernel level?
>>
>>What is the output of testsuite/latency while using the VT console?
>>
> 
> 
> I'm using the gx1fb framebuffer for the geode. However, since this problem
> occurs even when the VT outputting the text is not active, I don't think
> it's fb related.
> 
> The latency output is just a bunch of numbers. :P
>

Until those numbers are sane, there is no point in trying anything else though.

> Here is some output with the latency -p 500 command, and halfway through it
> I put a 100% load on the cpu.
> 

Ok, the testsuite clearly fails on your board, and something in the current setup 
prevents any real-time use. .config would help.

> 
> == Sampling period: 500 us
> == Test mode: periodic user-mode task
> warming up...
> RTT|  00:00:01  (periodic user-mode task, 500 us period)
> RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat
> worst
> RTD|    -2327277|    -1766041|    -1196976|       0|    -2327277|
> -1196976
> RTD|    -3443424|    -2882532|    -2293218|       0|    -3443424|
> -1196976
> RTD|    -4558603|     3176566|    -3412343|       0|    -4558603|
> -1196976
> RTD|    -5663780|     2061495|    -4522950|       0|    -5663780|
> -1196976
> RTD|    -6764019|      976449|    -5637527|       0|    -6764019|
> -1196976
> RTD|    -7885937|     -137963|    -6750223|       0|    -7885937|
> -1196976
> RTD|    -8993661|    -1254331|    -7868111|       0|    -8993661|
> -1196976
> RTD|   -10141655|    -2395933|    -8979941|       0|   -10141655|
> -1196976
> ---|------------|------------|------------|--------|------------------------
> -
> RTS|   -10141655|     -277784|    -1196976|       0|    00:00:08/00:00:08
> 
> 


-- 

Philippe.