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 Fri Jun 05, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
221650	2	199	0,2	sleep3	75	-21	kworker/3:1+events	23:10:42	3
139946	2	80	0,3	chrt	75	-21	kworker/3:1+events	21:50:40	3
225719	2	79	0,4	sleep0	0	-21	swapper/0	23:15:40	0
280497	2	68	0,4	sleep1	28	1	rcuc/1	00:10:44	1
4172635	99	67	59,6	cyclictest	154377	-21	kworker/u8:0+events_unbound	22:55:50	0
4172635	99	65	60,3	cyclictest	4177168	-21	kworker/u8:2+events_unbound	19:55:49	0
4172635	99	65	55,8	cyclictest	283461	-21	cp	00:15:01	0
4172641	99	62	56,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	20:40:50	2
4172635	99	61	55,4	cyclictest	3822996	-21	kworker/u8:0+events_unbound	20:05:50	0
4172638	99	57	48,6	cyclictest	89341	-21	latency_hist	21:00:01	1
4172635	99	57	52,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	19:40:51	0
4172635	99	57	51,4	cyclictest	268728	-21	kworker/u8:3+flush-8:0	00:00:53	0
165888	2	57	0,4	chrt	0	-21	swapper/0	22:15:41	0
4172638	99	56	50,4	cyclictest	263247	-21	apt-get	23:52:38	1
4172638	99	56	50,4	cyclictest	224069	-21	kworker/u8:2+flush-8:0	23:15:50	1
4172635	99	56	50,5	cyclictest	3822996	-21	kworker/u8:0+flush-8:0	19:25:52	0
4172635	99	56	50,4	cyclictest	257951	-21	kworker/u8:2+flush-8:0	00:15:51	0
4172635	99	55	50,4	cyclictest	154377	-21	kworker/u8:0+flush-8:0	23:25:51	0
4172635	99	55	50,4	cyclictest	154377	-21	kworker/u8:0+flush-8:0	23:25:51	0
4172635	99	55	49,5	cyclictest	154377	-21	kworker/u8:0+events_unbound	23:10:49	0
4172635	99	55	48,5	cyclictest	99668	-21	kworker/u8:1+events_unbound	21:25:51	0
4172635	99	54	48,4	cyclictest	278639	-21	kworker/u8:0+events_unbound	00:30:54	0
4172635	99	54	47,5	cyclictest	139118	-21	kworker/u8:1+flush-8:0	22:00:51	0
4172635	99	53	46,5	cyclictest	154377	-21	kworker/u8:0+events_unbound	22:10:49	0
4172635	99	52	48,3	cyclictest	238689	-21	kworker/u8:1+flush-8:0	23:35:51	0
4172635	99	52	45,5	cyclictest	174368	-21	kworker/u8:3+flush-8:0	23:40:47	0
4172635	99	52	36,4	cyclictest	54438	-21	kworker/u8:0+events_unbound	20:50:48	0
4172638	99	51	40,8	cyclictest	153281	-21	ntpq	22:00:47	1
4172635	99	51	47,3	cyclictest	3822996	-21	kworker/u8:0+events_unbound	19:15:52	0
4172635	99	51	46,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	21:10:36	0
4172635	99	50	47,2	cyclictest	133815	-21	kworker/u8:2+events_unbound	22:35:36	0
4172635	99	50	45,3	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	20:10:51	0
4172635	99	50	44,4	cyclictest	99668	-21	kworker/u8:1+flush-8:0	21:15:52	0
297660	2	50	0,3	sleep3	75	-21	kworker/3:1+events	00:25:50	3
4172635	99	49	43,4	cyclictest	3822996	-21	kworker/u8:0+flush-8:0	19:50:52	0
4172641	99	48	37,9	cyclictest	179102	-21	/usr/sbin/munin	22:30:01	2
4172635	99	48	42,4	cyclictest	302946	-21	kworker/u8:2+events_unbound	00:35:47	0
4172638	99	47	36,8	cyclictest	193057	-21	ntpq	22:40:47	1
4172635	99	47	41,4	cyclictest	133815	-21	kworker/u8:2+events_unbound	21:50:53	0
4172638	99	46	38,6	cyclictest	4189301	-21	latency_hist	19:25:01	1
4172638	99	46	33,10	cyclictest	1704890	-21	systemd-journal	21:30:00	1
4172635	99	46	40,4	cyclictest	3822996	-21	kworker/u8:0+events_unbound	19:45:51	0
4172635	99	46	39,5	cyclictest	139118	-21	kworker/u8:1+flush-8:0	22:20:45	0
4172635	99	46	32,12	cyclictest	257951	-21	kworker/u8:2+flush-8:0	00:05:57	0
92579	2	45	0,2	chrt	47	1	rcuc/3	21:00:41	3
4172635	99	45	41,3	cyclictest	99668	-21	kworker/u8:1+flush-8:0	21:40:52	0
4172635	99	45	41,3	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	20:00:51	0
4172635	99	45	41,3	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	20:00:51	0
4172635	99	45	39,4	cyclictest	4184599	-21	kworker/u8:1+events_unbound	20:15:34	0
4172635	99	45	38,5	cyclictest	278639	-21	kworker/u8:0+events_unbound	00:25:49	0
4172641	99	44	34,7	cyclictest	1704890	-21	systemd-journal	22:30:37	2
4172638	99	44	35,6	cyclictest	1704890	-21	systemd-journal	20:35:50	1
4172635	99	44	38,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	20:25:47	0
4172635	99	44	37,4	cyclictest	1	-21	systemd	23:52:38	0
4172635	99	44	31,11	cyclictest	45047	-21	kworker/u8:3+events_unbound	20:20:38	0
4172635	99	43	38,4	cyclictest	188676	-21	kworker/u8:1+flush-8:0	22:50:49	0
4172635	99	43	37,4	cyclictest	4184599	-21	kworker/u8:1+events_unbound	19:20:50	0
4172635	99	43	37,4	cyclictest	154377	-21	kworker/u8:0+events_unbound	23:55:51	0
4172635	99	43	36,4	cyclictest	45047	-21	kworker/u8:3+events_unbound	21:30:41	0
4172641	99	42	33,7	cyclictest	198902	-21	apt-get	22:50:00	2
4172638	99	42	36,4	cyclictest	229064	-21	/usr/sbin/munin	23:20:50	1
4172638	99	42	34,6	cyclictest	188676	-21	kworker/u8:1+flush-8:0	22:45:36	1
4172635	99	42	36,5	cyclictest	154377	-21	kworker/u8:0+events_unbound	22:05:50	0
4172638	99	41	32,7	cyclictest	19216	-21	ntpq	19:45:46	1
4172635	99	41	37,3	cyclictest	133815	-21	kworker/u8:2+flush-8:0	21:55:50	0
4172635	99	41	34,5	cyclictest	224069	-21	kworker/u8:2+events_unbound	23:20:48	0
4172635	99	41	34,4	cyclictest	154377	-21	kworker/u8:0+events_unbound	23:00:50	0
4172638	99	40	30,6	cyclictest	45047	-21	kworker/u8:3+flush-8:0	20:15:32	1
4172635	99	40	34,4	cyclictest	45047	-21	kworker/u8:3+events_unbound	20:35:49	0
4172635	99	40	16,15	cyclictest	278639	-21	kworker/u8:0+flush-8:0	00:22:56	0
4172638	99	39	32,5	cyclictest	154377	-21	kworker/u8:0+flush-8:0	22:10:51	1
4172635	99	39	35,3	cyclictest	45047	-21	kworker/u8:3+events_unbound	21:35:51	0
4172635	99	39	34,3	cyclictest	154377	-21	kworker/u8:0+events_unbound	22:25:41	0
4172635	99	39	33,4	cyclictest	174368	-21	kworker/u8:3+events_unbound	23:30:46	0
4172635	99	39	32,6	cyclictest	54438	-21	kworker/u8:0+flush-8:0	21:05:52	0
4172638	99	38	32,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	19:25:51	1
4172638	99	38	31,5	cyclictest	45047	-21	kworker/u8:3+flush-8:0	20:20:37	1
4172638	99	38	31,5	cyclictest	174368	-21	kworker/u8:3+events_unbound	23:30:51	1
4172638	99	38	29,7	cyclictest	3822997	-21	kworker/u8:3+events_unbound	19:15:03	1
4172638	99	38	28,7	cyclictest	1704890	-21	systemd-journal	23:00:00	1
4172635	99	38	27,8	cyclictest	198014	-21	ntpq	22:45:45	0
4172641	99	37	25,9	cyclictest	1704890	-21	systemd-journal	20:55:00	2
4172638	99	37	31,4	cyclictest	4177168	-21	kworker/u8:2+flush-8:0	21:15:35	1
4172638	99	36	30,4	cyclictest	79729	-21	/usr/sbin/munin	20:50:45	1
4172638	99	36	29,5	cyclictest	288758	-21	kworker/u8:1+events_unbound	00:30:36	1
4172638	99	36	24,9	cyclictest	277518	-21	ntpq	00:05:49	1
4172635	99	36	30,4	cyclictest	257951	-21	kworker/u8:2+events_unbound	23:45:53	0
4172638	99	35	29,4	cyclictest	3822996	-21	kworker/u8:0+events_unbound	19:50:50	1
4172638	99	35	29,4	cyclictest	154377	-21	kworker/u8:0+flush-8:0	22:25:51	1
4172635	99	35	32,1	cyclictest	54438	-21	kworker/u8:0+events_unbound	21:04:51	0
4172635	99	35	30,3	cyclictest	135350	-21	kthreadcore	21:45:41	0
4172635	99	35	30,3	cyclictest	135350	-21	kthreadcore	21:45:40	0
4172641	99	34	29,3	cyclictest	50773	-21	irqrtprio	20:20:39	2
4172641	99	34	29,3	cyclictest	188676	-21	kworker/u8:1+flush-8:0	22:40:53	2
4172641	99	34	27,5	cyclictest	116773	-21	sort	21:25:44	2
4172638	99	34	28,5	cyclictest	4177168	-21	kworker/u8:2+events_unbound	21:10:50	1
4172638	99	34	28,4	cyclictest	154377	-21	kworker/u8:0+flush-8:0	23:55:52	1
4172638	99	34	26,6	cyclictest	3822996	-21	kworker/u8:0+events_unbound	19:35:51	1
4172638	99	34	26,6	cyclictest	154377	-21	kworker/u8:0+events_unbound	23:05:48	1
4172638	99	34	26,6	cyclictest	139118	-21	kworker/u8:1+events_unbound	22:20:48	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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