[Xenomai] imx6q xenomai ipipe-3.0-imx6q

嵌入式工程师 ericvic at 163.com
Thu Apr 3 12:25:06 CEST 2014


oh ,thanks
在 2014-04-02 15:28:10,"Gilles Chanteperdrix" <gilles.chanteperdrix at xenomai.org> 写道:
>On 04/02/2014 02:53 AM, 嵌入式工程师 wrote:
>> I know latency test can not run with e other real-time  activity, but
>> my program will run some real-time activties at the same time ,now it
>> looks  like because multiple cpu shared memory causes a great
>> difference jitter .
>
>That is not your problem. Your problem is that if you run a task with
>priority 99 on the same cpu as the latency test, the time this task
>prevents the latency test from running is counted by the latency test as
>latency, which gives wrong results. This is not latency, this is simply
>the scheduler doing its job: letting a task running until it suspends
>before letting the latency task running. That is because the two tasks
>have the same priority.
>
>-- 
>                                                                Gilles.


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