On 09/05/2013 11:32 PM, Thierry Bultel wrote:
> Hi,
>
> I have noticed something really weird.
> I was using for months the 3.0.43 kernel from ipipe-gch.git
>
> When the target is idle, I mean, with 4 CPUs at almost 0 % load,
> the temperature (/sys/class/thermal/thermal_zone0/temp) is about 66 degrees.
> (there is no heat spreader).
>
> With each CPU at 100%, the temperature gets over 90 quickly and the
> target reboots.
>
> Since today, I was -at last- able to apply the latest available ipipe patch
> (adeos-ipipe-3.0.43) from xenomai-2.6.git head) on the 3.0.35_4.0.0
> kernel from Freescale.
>
> With that kernel, in idle, the temperature is only 44 degrees,
> with 4 CPUs to 100% the temperature stabilizes at 60 degrees.
>
> I am a little bit puzzled ... I am obviously using the same config in
> both cases.
> Does anyone have an idea ?
Also, check the idle routine, maybe the mx6 specific patch removes some
parts of the idle routine because it causes high latencies, which the
mainline I-pipe patch can not do because it does not patch the mx6
specific code.
--
Gilles.
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