Le 11/12/2012 17:50, Gilles Chanteperdrix a écrit :
On 12/11/2012 05:01 PM, Thierry Bultel wrote:
Le 11/12/2012 16:36, Gilles Chanteperdrix a écrit :
On 12/11/2012 04:26 PM, Thierry Bultel wrote:
Gilles,
another issue (likely related, and that may help to diagnose) that I can
see is that time is completely wrong;
For instance:
[root@buildroot ~]# time sleep 10
real 0m10.009s
user 0m0.002s
sys 0m0.013s
The system says that it spent 10 secs but I actually measured 25 secs.
No, that is likely because you have CONFIG_CPU_FREQ or CONFIG_CPU_IDLE
enabled.
Thanks, yes this was CONFIG_CPU_FREQ
Ok, and when running at full speed, do the timer thread always take 20%
cpu ?
It is much better. I only have 1.3% of CPU load.
Also the target seems really stable now. Thanks a lot, again.
The only remaining 'weird' issue is that the iMX Timer Tick counter in
/proc/interrupts does not increase whereas it does when CONFIG_IPIPE is
set to NO. It is not really a blocking issue, but I would like to
understand why.
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