OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Jul 23, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3885669	99	55	47,6	cyclictest	4093596	-21	latency_hist	22:45:01	1
3885667	99	53	46,5	cyclictest	4163282	-21	latency_hist	23:55:01	0
3885669	99	47	39,6	cyclictest	4153624	-21	kworker/u8:2+flush-8:0	00:02:55	1
3885677	99	44	40,3	cyclictest	3838737	-21	kworker/u8:2+events_unbound	21:37:50	2
3885669	99	44	34,7	cyclictest	4062693	-21	latency_hist	22:05:01	1
3885667	99	44	39,4	cyclictest	3907536	-21	kworker/u8:1+flush-8:0	19:42:43	0
3885677	99	42	35,5	cyclictest	3972618	-21	apt-get	20:35:00	2
3885669	99	42	36,4	cyclictest	3907536	-21	kworker/u8:1+flush-8:0	20:32:55	1
3885677	99	41	36,4	cyclictest	4183721	-21	kworker/u8:1+events_unbound	00:37:56	2
3885677	99	41	36,4	cyclictest	4183721	-21	kworker/u8:1+events_unbound	00:32:47	2
3885677	99	40	36,3	cyclictest	3972446	-21	kworker/u8:3+events_unbound	22:17:50	2
3885677	99	40	36,3	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	21:13:02	2
3885667	99	40	33,5	cyclictest	278	-21	systemd-journal	20:32:40	0
3885667	99	40	31,7	cyclictest	278	-21	systemd-journal	22:55:00	0
3885677	99	39	35,3	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	21:22:43	2
3885677	99	39	34,4	cyclictest	4103715	-21	kworker/u8:0+flush-8:0	22:57:56	2
3885677	99	39	34,4	cyclictest	4023079	-21	kworker/u8:1+events_unbound	21:27:46	2
3885677	99	39	34,4	cyclictest	4023079	-21	kworker/u8:1+events_unbound	21:27:46	2
3885677	99	38	34,3	cyclictest	4103715	-21	kworker/u8:0+events_unbound	23:12:42	2
3885669	99	38	33,4	cyclictest	3972446	-21	kworker/u8:3+flush-8:0	21:12:51	1
3885667	99	38	32,4	cyclictest	4555	-21	cron	00:35:01	0
3885667	99	38	29,7	cyclictest	4148439	-21	latency_hist	23:40:00	0
3880978	2	38	4,9	sleep1	0	-21	swapper/1	19:06:25	1
3885677	99	37	33,3	cyclictest	3907536	-21	kworker/u8:1+events_unbound	19:47:56	2
3885667	99	37	32,3	cyclictest	4153624	-21	kworker/u8:2+events_unbound	00:10:00	0
3885667	99	37	27,8	cyclictest	3913041	-21	/usr/sbin/munin	19:37:48	0
3885667	99	37	26,8	cyclictest	278	-21	systemd-journal	21:35:00	0
3885667	99	37	1,34	cyclictest	3932437	-21	munin-run	19:55:01	0
3885677	99	36	31,4	cyclictest	3972446	-21	kworker/u8:3+events_unbound	20:57:56	2
3885677	99	36	28,6	cyclictest	3942747	-21	apt-get	20:05:00	2
3885669	99	36	30,4	cyclictest	3932396	-21	apt-get	19:55:00	1
3885667	99	36	32,3	cyclictest	4138534	-21	kworker/u8:3+flush-8:0	00:12:56	0
3885667	99	36	32,3	cyclictest	4087616	-21	kworker/u8:1+flush-8:0	23:22:56	0
3885667	99	36	31,3	cyclictest	3972446	-21	kworker/u8:3+flush-8:0	20:37:50	0
3885677	99	35	31,3	cyclictest	4153624	-21	kworker/u8:2+events_unbound	23:52:55	2
3885669	99	35	30,4	cyclictest	3972446	-21	kworker/u8:3+flush-8:0	20:42:43	1
3885669	99	35	30,3	cyclictest	3908826	-21	irqrtprio	19:32:43	1
3885667	99	35	31,3	cyclictest	3907536	-21	kworker/u8:1+events_unbound	19:32:54	0
3885677	99	34	30,3	cyclictest	3972446	-21	kworker/u8:3+events_unbound	21:55:02	2
3885669	99	34	29,4	cyclictest	4153624	-21	kworker/u8:2+flush-8:0	00:27:41	1
3885669	99	34	23,8	cyclictest	278	-21	systemd-journal	23:57:59	1
3885667	99	34	29,4	cyclictest	4138534	-21	kworker/u8:3+flush-8:0	00:22:40	0
3885667	99	34	29,4	cyclictest	4103715	-21	kworker/u8:0+flush-8:0	23:57:42	0
3885667	99	34	28,4	cyclictest	3943428	-21	apt-get	20:07:37	0
3885667	99	34	27,5	cyclictest	4173018	-21	grep	00:02:57	0
3885677	99	33	28,3	cyclictest	4087616	-21	kworker/u8:1+events_unbound	23:45:01	2
3885667	99	33	28,4	cyclictest	3907536	-21	kworker/u8:1+flush-8:0	19:57:41	0
3885667	99	33	26,5	cyclictest	4183691	-21	latency_hist	00:20:02	0
3885667	99	33	26,3	cyclictest	3982832	-21	munin-run	20:45:02	0
3885667	99	33	23,8	cyclictest	4091602	-21	ntpq	22:32:49	0
3885667	99	33	19,5	cyclictest	3838737	-21	kworker/u8:2+events_unbound	19:10:00	0
3885677	99	32	28,3	cyclictest	3972446	-21	kworker/u8:3+events_unbound	22:52:49	2
3885677	99	32	28,3	cyclictest	3069895	-21	kworker/u8:3+events_unbound	19:27:50	2
3885669	99	32	27,4	cyclictest	4183721	-21	kworker/u8:1+flush-8:0	00:32:40	1
3885669	99	32	27,3	cyclictest	4003861	-21	irqcore	21:07:43	1
3885669	99	32	26,4	cyclictest	4103715	-21	kworker/u8:0+flush-8:0	23:32:55	1
3885669	99	32	26,4	cyclictest	3902651	-21	cron	19:25:00	1
3885667	99	32	28,2	cyclictest	4123482	-21	latency_hist	23:15:01	0
3885667	99	32	27,3	cyclictest	4183721	-21	kworker/u8:1+events_unbound	00:37:44	0
3885667	99	32	26,4	cyclictest	3988373	-21	apt-get	20:52:34	0
3885667	99	32	25,5	cyclictest	4077938	-21	apt-get	22:22:36	0
3885669	99	31	25,4	cyclictest	3907536	-21	kworker/u8:1+flush-8:0	19:37:41	1
3885669	99	31	22,6	cyclictest	4133369	-21	latency_hist	23:25:00	1
3885669	99	31	20,8	cyclictest	278	-21	systemd-journal	20:12:49	1
3885667	99	31	26,4	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	19:27:57	0
3880922	2	31	4,10	sleep2	0	-21	swapper/2	19:05:42	2
3885677	99	30	24,4	cyclictest	278	-21	systemd-journal	00:04:09	2
3885669	99	30	25,4	cyclictest	4138534	-21	kworker/u8:3+flush-8:0	23:42:42	1
3885667	99	30	25,3	cyclictest	4082275	-21	kworker/u8:0+events_unbound	22:27:54	0
3885667	99	30	24,4	cyclictest	4022616	-21	latency_hist	21:25:00	0
3885667	99	30	23,5	cyclictest	3967680	-21	latency_hist	20:30:01	0
3885667	99	30	23,5	cyclictest	3967680	-21	latency_hist	20:30:00	0
3885667	99	30	21,7	cyclictest	4042059	-21	ntpq	21:42:53	0
3885667	99	30	20,8	cyclictest	4011944	-21	ntpq	21:12:55	0
4172091	2	29	0,3	sleep3	577	-21	kworker/3:2+events	00:02:48	3
4030514	2	29	0,2	sleep3	48	1	ktimers/3	21:32:47	3
3885677	99	29	25,3	cyclictest	3972446	-21	kworker/u8:3+events_unbound	22:12:49	2
3885677	99	29	25,3	cyclictest	3838737	-21	kworker/u8:2+events_unbound	19:10:03	2
3885669	99	29	25,2	cyclictest	4184739	-21	irqcore	00:22:42	1
3885669	99	29	24,4	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	22:52:55	1
3885669	99	29	24,4	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	20:28:10	1
3885669	99	29	24,4	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	20:28:10	1
3885669	99	29	24,3	cyclictest	3973614	-21	fschecks_time	20:37:42	1
3885669	99	29	21,6	cyclictest	3957799	-21	cron	20:20:00	1
3885667	99	29	24,4	cyclictest	4028630	-21	kworker/u8:4+flush-8:0	21:52:56	0
3885667	99	29	24,3	cyclictest	4028630	-21	kworker/u8:4+flush-8:0	21:57:52	0
3885667	99	29	24,3	cyclictest	3948897	-21	irqcore	20:12:45	0
3885667	99	29	23,4	cyclictest	4103715	-21	kworker/u8:0+events_unbound	23:27:44	0
3885667	99	29	23,4	cyclictest	3838737	-21	kworker/u8:2+flush-8:0	19:17:52	0
3885667	99	29	18,8	cyclictest	4192854	-21	ntpq	00:27:49	0
3885677	99	28	24,3	cyclictest	4028630	-21	kworker/u8:4+events_unbound	21:32:48	2
3885677	99	28	24,3	cyclictest	3972446	-21	kworker/u8:3+events_unbound	20:39:50	2
3885669	99	28	25,2	cyclictest	4037795	-21	systemd-run	21:40:01	1
3885669	99	28	24,3	cyclictest	4183720	-21	true	00:20:00	1
3885669	99	28	24,3	cyclictest	4138509	-21	cron	23:30:00	1
3885669	99	28	24,3	cyclictest	3838737	-21	kworker/u8:2+events_unbound	19:45:01	1
3885669	99	28	23,4	cyclictest	402	-21	systemd-logind	21:32:36	1
3885669	99	28	23,4	cyclictest	3907536	-21	kworker/u8:1+events_unbound	20:22:41	1
3885669	99	28	23,3	cyclictest	4138534	-21	kworker/u8:3+events_unbound	23:37:40	1
3885669	99	28	23,3	cyclictest	4017644	-21	idleruntime-cro	21:20:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17