linux4.14+xenomai3.1 real-time

Meng, Fino fino.meng at intel.com
Sun Apr 19 04:33:51 CEST 2020


>
>dear Xenomai Team:
>
>When we tested on the Intel(r) Celeron(r) processor 1047ue (third
>generation) motherboard (using kernel version: 4.1.18, xenomai version: 2.6.
>5, patch: ipipe-core-4.1.18-x86-3. ), The real-time test results meet the requirements.But the 4.1.18 version of the kernel
>(xenomai version 2.6.5) running on the Intel(r) Celeron(r) processor 3955U (sixth generation) motherboard can not
>guarantee real-time performance
>
>And on Intel(r) Celeron(r) processor 3955U (sixth generation) motherboard (kernel version: 4.14.134, xenomai version: 3.1,
>patch:
>ipipe-core-4.14.134-x86-2. Patch ), We have done many configuration modification tests. However, the maximum jitter is
>25u under 1ms, the real-time test results cannot meet our requirements. Our goal is a maximum jitter of around 10u.
>
>We would like to ask what relevant content needs to be modified.
>
>

Hi houliang,

by our experience, to reach worst case jitter around 10u is hard. 
If your cycle period is 1ms, do u really need 10u in your application?

BR / Fino (孟祥夫)
Intel – IOTG Developer Enabling




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