[ltt-dev] LTTng on OMAP3 with Android

[ltt-dev] LTTng on OMAP3 with Android

[Mathieu Desnoyers]

* Hugo Dupras-XID (h-dupras at ti.com) wrote:
>
> Hello,
>
> I try to apply and use LTTng on OMAP3 with Android. I applied LTTng  
> 0.124 kernel patches to the Android kernel because Android is always at  
> 2.6.29 kernel version.
> LTTng seems to work correctly, I obtain data and viewing them with LTTV.  
> Unfortunately the timings are just wrong and some tasks appears smaller  
> than they should be. I saw a correction for the OMAP trace clock with  
> the 0.134 kernel patches, but i blocked applying these patches to the  
> android kernel (some files dont exit in the 2.6.29 kernel).
>
> So my question is : Is there anybody who succeed to apply LTTng on  
> Android, and how ??

Have you looked at the lttng-omap tree ? It is based on 2.6.32-rc8-omap
though.

See http://lttng.org/content/download

LTTng OMAP support prior to this one won't support suspend/resume and
DVFS correctly. The LTTng version you have for 2.6.29 is possibly based
on the "generic" timestamp support, which provides a 1 HZ accuracy,
which is pretty coarse.

Hope this helps,

Mathieu

>
> Thanks advance,
>
> Regards,
> Hugo
>
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com