> >-----Original Message----- >From: Chen, Hongzhan >Sent: Tuesday, December 7, 2021 11:11 AM >To: xenomai@xenomai.org<mailto:xenomai@xenomai.org>; Jan Kiszka >jan.kis...@siemens.com<mailto:jan.kis...@siemens.com> >Subject: questions about comments on >https://gitlab.com/Xenomai/xenomai-hacker-space/-/issues/33 > >Hi Jan > >I have some questions about comments on >https://gitlab.com/Xenomai/xenomai-hacker-space/-/issues/33 and need your help >to comment more. > >1. I do not quite understand the requirement "visualize task switches >correctly in Kernelshark (color in CPU bar is not updating on >cobalt_switch_context)". > >When I click the cobalt_switch_context event listed in the event table on the >second half in the kernelshark, actually color in cpu bar is updating to >green because there is long green vertical line to mark focused event like >attached picture. In addition , In spite of focused thing, colors mainly >change depending on what task is running for cpu plots in kernelshark. when >cobalt_switch_context is traced, it still be in the prev context and its >color is same with task prev in kernelshark. Do we want to update color of >cobalt_switch_context to specific color different from all tasks even if >there is no >focused thing? What result do we need to achieve when there is >cobalt_switch_context, Could you be more specific?
After I understand what does means about sched_switch in kernelshark, I guess that we need to use cobalt_switch_context as dividing line for RT/non-RT tasks similar with sched_switch after we use xenomai. Regards Hongzhan Chen > >2. Regarding the requirement " visualize RT/Non-RT (out-of-band/in-band) >state in CPU bar)", > 2.1. Do we need to differentiate state running a Linux task out-of-band > and running whatever code from the out-of-band execution stage as described in > " What you really need to know at this point" of > https://evlproject.org/dovetail/altsched/? > 2.2 What state do we want to show in CPU bar? Different color covering > the size of RT/Non-RT state other than all tasks and CPUs? If so, we may > ask for a plugin > in kernelshark , which would raise similar question as you mentioned > in comments. > >For the other two aspects, I still need more time to do research. > > >Regards > >Hongzhan Chen
