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 ?
Cheers
Thierry
Le 30/06/2013 20:39, Gilles Chanteperdrix a écrit :
On 06/28/2013 11:24 AM, Thierry Bultel wrote:
I understand that the thermal management is disabled with xenomai,
because CPU_FREQ is forbidden.
If you are using the Freescale kernel, CPU_FREQ should actually be
enabled. But it is true that the frequency should not be changed after
Xenomai is started, as Xenomai does not support it. However, if I
remember correctly, there was a kernel parameter allowing to select a
frequency at boot time.
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