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Date: Thu, 26 Aug 2010 14:32:56 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] kernel compilation problem with a Cortex A8,
 AM3517 EVM
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To: marc doz <doz.marc@domain.hid>
Cc: xenomai@xenomai.org

marc doz wrote:
> Actualy, I have got 2 versions :
> 1) TI SDK : OMAP35x-PSP-SDK-03.00.00.05 with a kernel 2.6.32 which
> comes from linux-omap-2.6.git with specific TI patch for EVM of AM3517
> 2) TI SDK : OMAP35x-PSP-SDK-03.00.00.02 with a kernel 2.6.31-rc7 which
> comes from linux-omap-2.6.git with specific TI patch for EVM of AM3517
> 
> I am testing solution 2 with software examples for native skin.
> 
> ./trivial-periodic
> Time since last turn: 1000.024230 ms
> Time since last turn: 999.991461 ms
> Time since last turn: 999.991999 ms
> Time since last turn: 999.999384 ms
> Time since last turn: 999.998538 ms
> Time since last turn: 1000.005999 ms
> Time since last turn: 999.993538 ms
> 
> ./rtprint
> This triggers auto-init of rt_print for the calling thread.
> A last switch to secondary mode can occure here, but future invocations of rt_pr
> 401f0470: #1 Yet another RT printer - but to stderr.
> 400221e0 Task 1: #1 Hello RT world!
> 401f0470: #2 Yet another RT printer - but to stderr.
> 401f0470: #3 Yet another RT printer - but to stderr.
> 
> What do you think about this test ?
> can you recommend me  some measure points  ?

You want to run the latency test. But the latency on a system without
load is meaningless. As part of validating Xenomai, we use a test called
"dohell" to load the system. We provide a system to build a root
filesystem for running these tests called mkrootfs, available through git:
http://git.xenomai.org/?p=mkrootfs.git;a=summary

It has a README which should help you generate the root filesystem.

The procedure to run the test is:
- in a telnet session connected to the board, run the latency test
- in another telnet session, launch "dohell"
- when this scripts displays "Listening on any address 5566"
  run netcat target 5566 > /dev/null

Now wait a few hours.

-- 
					    Gilles.