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Date: Sun, 19 Jan 2014 00:24:26 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai] Fwd: Kernel Compilation Problems
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To: Andy Pugh <andy@bodgesoc.org>
Cc: xenomai <xenomai@xenomai.org>

On 01/18/2014 11:31 PM, Andy Pugh wrote:
> On 18 January 2014 12:43, Gilles Chanteperdrix
> <gilles.chanteperdrix@xenomai.org> wrote:
> 
>> It is an imx6, right? Could you try ton run the X server without
>> acceleration (using the fbdev driver)?
> 
> That does look a lot more promising:
> 
> RTT|  00:00:43  (periodic user-mode task, 1000 us period, priority 99)
> RTH|----lat min|----lat avg|----lat max|-overrun|---msw|---lat best|--lat worst
> RTD|      6.404|     13.219|     42.202|       0|     0|      1.709|     44.921
> RTD|      3.856|     14.416|     46.916|       0|     0|      1.709|     46.916
> RTD|      3.765|     15.383|     36.954|       0|     0|      1.709|     46.916
> RTD|      2.939|     15.292|     40.489|       0|     0|      1.709|     46.916
> RTD|      2.886|     15.669|     75.785|       0|     0|      1.709|     75.785
> RTD|      3.679|     15.752|     42.689|       0|     0|      1.709|     75.785
> RTD|      4.585|     17.161|     47.861|       0|     0|      1.709|     75.785
> RTD|      4.590|     16.749|     46.838|       0|     0|      1.709|     75.785
> RTD|      3.343|     14.154|     28.101|       0|     0|      1.709|     75.785
> RTD|      3.323|     16.641|     48.358|       0|     0|      1.709|     75.785
> 
> The 75uS was the point where I opened a web browser. Running glxgears
> seemed to have no effect at all

75uS still looks like a lot for a cortex A9, how many cores does it have?

-- 
                                                                Gilles.