On 14.12.21 07:44, Chen, Hongzhan wrote: >> >> >> -----Original Message----- >> From: Jan Kiszka <[email protected]> >> Sent: Tuesday, December 14, 2021 2:38 PM >> To: Chen, Hongzhan <[email protected]>; [email protected] >> Subject: Re: [RFC PATCH 1/2] kernel-shark: add plugin for handling xenomai >> cobalt context switch event >> >> On 14.12.21 04:15, Hongzhan Chen wrote: >>> For Xenomai-cobalt enabled system, cobalt_switch_context means that there >>> is context switch in companion core(realtime core), which we may need >>> to do special treatment and take correct action as main kernel sched_switch. >>> We need to update cpu bar regarding cobalt_switch_context event to correct >>> color as switching-in task. >> >> It's tricker... I have trace with the following sequence here: >> >> gdb-898 [000] 753.944137: cobalt_switch_context: >> prev_name=ROOT/0 prev_pid=0 prev_prio=-1 prev_state=0x218008 ==> >> next_name=pthelper next_pid=912 next_prio=3 >> gdb-898 [000] 753.944142: cobalt_timer_start: >> timer=0xef7e8200([watchdog]) value=4000000000 interval=0 mode=0x0 >> pthelper-912 [000] 753.944172: cobalt_shadow_hardened: >> state=0x240840 info=0x0 >> >> Your plugin correctly switches colors on cobalt_switch_context, but that >> cobalt_timer_start is still running under the previous pid, causing a >> color switch-back and than forth on cobalt_shadow_hardened. We need to >> understand why and possibly fix that or rethink the visualization. > > You need to click menu Plots->tasks and then select RT tasks and then apply. > It would tigger plugin shape to redraw > and then the issue you observed would be fixed by plugin.
OK, now I also see that blue "OOB" box under the RT task. But the that does not affect the CPU graph, it continues to jump back and forth. And it has no RT mode visualization. BTW, is that blue hollow box exclusive for our plugin? Or can this be customized? Is it explained somewhere in Kernelshark what hollow boxes mean? Jan -- Siemens AG, T RDA IOT Corporate Competence Center Embedded Linux
