Timing issue with Dummynet on high kernel timer interrupt

Rasool Al-Saadi ralsaadi at swin.edu.au
Wed Nov 4 23:44:24 UTC 2015


On Wednesday, 4 November 2015 12:34 AM, Hans Petter Selasky wrote:
> On 11/03/15 14:14, Rasool Al-Saadi wrote:
> > Does anyone have thoughts on what we can test next to narrow down the
> root-cause of these unusual timing jumps?
> 
> You might also want to test the "projects/hps_head" branch, which uses a bit
> different callout implementation.

Thanks Hans for your suggestion.
I have tried "projects/hps_head" branch and the result is better (number of spikes is less than in the master branch). However, the problem still exists on the same timer interrupt frequencies (>3000 in my case). You can see in this graph https://goo.gl/photos/C2Mqx4xhMQuzxWnz6 the RTT spikes still there.

Do you have any further suggestions? 

Regards,
Rasool

> --HPS
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