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 Tue Jun 30, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1104957	2	198	0,2	sleep3	48	1	ktimers/3	11:05:21	3
934003	2	184	0,2	sleep3	75	-21	kworker/3:1-events	08:15:17	3
866600	99	60	56,3	cyclictest	861527	-21	kworker/u8:0+events_unbound	07:20:30	1
866600	99	59	52,5	cyclictest	861527	-21	kworker/u8:0+events_unbound	07:30:28	1
866600	99	59	52,5	cyclictest	1097665	-21	latency_hist	11:00:01	1
866598	99	59	48,8	cyclictest	1017879	-21	latency_hist	09:40:01	0
866598	99	59	48,8	cyclictest	1017879	-21	latency_hist	09:40:00	0
866600	99	57	52,4	cyclictest	861527	-21	kworker/u8:0+events_unbound	07:25:31	1
866600	99	57	51,4	cyclictest	1177887	-21	kworker/u8:3+events_unbound	12:25:28	1
866598	99	57	43,10	cyclictest	1062503	-21	apt-get	10:25:01	0
866600	99	56	50,5	cyclictest	1012799	-21	kworker/u8:3+flush-8:0	09:55:26	1
866598	99	56	50,4	cyclictest	1012799	-21	kworker/u8:3+flush-8:0	09:45:31	0
866600	99	55	48,5	cyclictest	952337	-21	kworker/u8:2+flush-8:0	08:40:25	1
866600	99	54	48,4	cyclictest	973073	-21	kworker/u8:3+flush-8:0	09:10:28	1
866600	99	54	48,4	cyclictest	1110386	-21	kworker/u8:1+events_unbound	12:35:31	1
866600	99	54	47,5	cyclictest	1057537	-21	kworker/u8:0+events_unbound	10:40:24	1
866600	99	53	47,3	cyclictest	992458	-21	kworker/u8:1+events_unbound	10:20:31	1
866600	99	53	46,5	cyclictest	1110386	-21	kworker/u8:1+events_unbound	11:10:28	1
866598	99	53	43,8	cyclictest	1081666	-21	ntpq	10:40:23	0
866600	99	52	48,3	cyclictest	861527	-21	kworker/u8:0+events_unbound	07:15:30	1
866600	99	52	48,3	cyclictest	1057537	-21	kworker/u8:0+events_unbound	11:25:30	1
866600	99	52	45,5	cyclictest	992458	-21	kworker/u8:1+flush-8:0	09:35:26	1
866600	99	52	45,5	cyclictest	992458	-21	kworker/u8:1+flush-8:0	09:35:25	1
866600	99	52	45,5	cyclictest	873512	-21	kworker/u8:3+events_unbound	08:30:27	1
866600	99	52	43,6	cyclictest	1121522	-21	ntpq	11:20:23	1
866600	99	51	47,3	cyclictest	952337	-21	kworker/u8:2+events_unbound	08:55:29	1
866600	99	51	47,3	cyclictest	873512	-21	kworker/u8:3+events_unbound	07:55:16	1
866600	99	51	44,5	cyclictest	1167847	-21	kworker/u8:0+events_unbound	12:30:28	1
866600	99	51	44,5	cyclictest	1101918	-21	kworker/u8:3+events_unbound	11:05:27	1
866600	99	51	43,6	cyclictest	907799	-21	kworker/u8:0+flush-8:0	09:20:26	1
866600	99	51	43,6	cyclictest	907799	-21	kworker/u8:0+flush-8:0	09:20:26	1
866600	99	50	43,5	cyclictest	992458	-21	kworker/u8:1+events_unbound	10:10:24	1
866600	99	50	42,6	cyclictest	1044834	-21	kworker/u8:2+events_unbound	10:50:28	1
866600	99	49	45,3	cyclictest	992458	-21	kworker/u8:1+events_unbound	09:30:23	1
866600	99	49	33,11	cyclictest	1704890	-21	systemd-journal	09:41:01	1
866600	99	48	43,3	cyclictest	1116594	-21	ntpq	11:15:25	1
866600	99	48	42,5	cyclictest	1081734	-21	kworker/u8:1+events_unbound	10:45:26	1
866600	99	48	37,9	cyclictest	947098	-21	ntpq	08:25:25	1
866600	99	48	37,8	cyclictest	870617	-21	ntpq	07:10:28	1
866600	99	47	41,5	cyclictest	952337	-21	kworker/u8:2+events_unbound	08:35:28	1
866600	99	47	41,4	cyclictest	907799	-21	kworker/u8:0+flush-8:0	08:50:24	1
866600	99	47	41,4	cyclictest	1081734	-21	kworker/u8:1+events_unbound	11:00:27	1
866600	99	46	39,5	cyclictest	1044834	-21	kworker/u8:2+events_unbound	10:25:28	1
866600	99	45	40,4	cyclictest	1110386	-21	kworker/u8:1+events_unbound	11:35:31	1
866600	99	45	38,5	cyclictest	1062961	-21	kworker/u8:3+events_unbound	10:35:27	1
866600	99	45	37,6	cyclictest	1161102	-21	ntpq	12:00:26	1
866600	99	44	38,5	cyclictest	873512	-21	kworker/u8:3+events_unbound	08:00:27	1
866600	99	44	38,4	cyclictest	1162250	-21	kworker/u8:2+flush-8:0	12:15:31	1
866598	99	44	35,6	cyclictest	1037641	-21	latency_hist	10:00:02	0
866600	99	43	38,4	cyclictest	1101918	-21	kworker/u8:3+flush-8:0	12:05:15	1
866600	99	43	33,8	cyclictest	912223	-21	ntpq	07:50:25	1
866598	99	43	34,6	cyclictest	1704890	-21	systemd-journal	07:30:01	0
866598	99	43	30,10	cyclictest	1704890	-21	systemd-journal	08:54:59	0
866600	99	42	38,3	cyclictest	907799	-21	kworker/u8:0+events_unbound	10:00:33	1
866600	99	42	35,5	cyclictest	1146850	-21	kworker/u8:0+events_unbound	11:50:27	1
866598	99	42	31,8	cyclictest	1704890	-21	systemd-journal	09:05:00	0
866600	99	41	35,5	cyclictest	1012799	-21	kworker/u8:3+flush-8:0	09:50:26	1
866600	99	41	33,6	cyclictest	936913	-21	ntpq	08:15:23	1
866598	99	41	30,7	cyclictest	1704890	-21	systemd-journal	10:25:03	0
866605	99	40	33,5	cyclictest	861527	-21	kworker/u8:0+flush-8:0	07:25:26	2
866600	99	40	36,3	cyclictest	1137912	-21	kworker/u8:2+flush-8:0	11:45:33	1
866600	99	40	35,4	cyclictest	1167847	-21	kworker/u8:0+events_unbound	12:20:13	1
866600	99	39	35,3	cyclictest	952337	-21	kworker/u8:2+events_unbound	08:45:30	1
866600	99	39	33,5	cyclictest	873512	-21	kworker/u8:3+events_unbound	07:35:14	1
866600	99	39	33,5	cyclictest	873512	-21	kworker/u8:3+events_unbound	07:35:14	1
866598	99	39	30,6	cyclictest	928004	-21	latency_hist	08:10:01	0
866598	99	39	29,8	cyclictest	1042848	-21	/usr/sbin/munin	10:05:22	0
866598	99	39	29,7	cyclictest	1704890	-21	systemd-journal	08:30:00	0
866600	99	38	33,4	cyclictest	1012799	-21	kworker/u8:3+events_unbound	09:45:17	1
866600	99	38	31,5	cyclictest	873512	-21	kworker/u8:3+events_unbound	08:20:26	1
866598	99	38	31,5	cyclictest	1166026	-21	ntpq	12:05:23	0
866598	99	38	30,6	cyclictest	1704890	-21	systemd-journal	11:34:59	0
866605	99	37	12,14	cyclictest	0	-21	swapper/2	11:40:13	2
866600	99	37	33,3	cyclictest	873512	-21	kworker/u8:3+events_unbound	08:10:36	1
866600	99	37	25,9	cyclictest	1704890	-21	systemd-journal	09:10:00	1
866605	99	36	20,13	cyclictest	1023353	-21	tr	09:45:15	2
866600	99	36	31,4	cyclictest	1110386	-21	kworker/u8:1+flush-8:0	11:55:26	1
866600	99	36	25,9	cyclictest	1131478	-21	ntpq	11:30:28	1
866598	99	36	27,7	cyclictest	907201	-21	ntpq	07:45:24	0
866605	99	35	19,14	cyclictest	898855	-21	fschecks_time	07:40:17	2
866605	99	35	15,4	cyclictest	927618	-21	grep	08:05:34	2
866600	99	35	31,3	cyclictest	1012799	-21	kworker/u8:3+events_unbound	10:05:28	1
866600	99	35	29,4	cyclictest	907799	-21	kworker/u8:0+events_unbound	09:15:32	1
866598	99	35	24,9	cyclictest	1136352	-21	ntpq	11:35:27	0
866600	99	34	30,3	cyclictest	907799	-21	kworker/u8:0+events_unbound	08:05:31	1
866600	99	34	30,3	cyclictest	1062961	-21	kworker/u8:3+flush-8:0	10:30:28	1
866600	99	34	25,6	cyclictest	1704890	-21	systemd-journal	09:01:00	1
866598	99	34	30,3	cyclictest	873512	-21	kworker/u8:3+events_unbound	07:40:20	0
866598	99	34	28,4	cyclictest	898221	-21	latency_hist	07:40:01	0
866598	99	34	28,4	cyclictest	898221	-21	latency_hist	07:40:00	0
866598	99	34	24,7	cyclictest	892250	-21	ntpq	07:30:25	0
866335	2	34	4,10	sleep2	0	-21	swapper/2	07:09:15	2
866605	99	33	20,11	cyclictest	1147185	-21	cron	11:50:00	2
866605	99	33	19,12	cyclictest	1182613	-21	cpuspeed_turbos	12:25:14	2
866605	99	33	18,13	cyclictest	0	-21	swapper/2	08:00:23	2
866598	99	33	24,7	cyclictest	1704890	-21	systemd-journal	09:20:00	0
866598	99	33	2,30	cyclictest	1082629	-21	kworker/0:0+events	11:50:47	0
866598	99	33	2,30	cyclictest	1082629	-21	kworker/0:0+events	10:53:49	0
866605	99	32	26,4	cyclictest	943051	-21	cron	08:25:00	2
866605	99	32	26,4	cyclictest	1131871	-21	unixbench_multi	11:30:33	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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