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 Mon Apr 27, 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
1585721	2	191	0,3	sleep3	75	-21	kworker/3:1+events	07:11:22	3
1882744	2	81	0,2	chrt	0	-21	swapper/3	12:11:10	3
1581524	99	72	67,3	cyclictest	1702885	-21	kworker/u8:2+events_unbound	09:46:22	1
1581524	99	69	62,5	cyclictest	1657659	-21	kworker/u8:3+events_unbound	08:36:17	1
1581524	99	68	62,4	cyclictest	1657659	-21	kworker/u8:3+events_unbound	10:06:22	1
1581524	99	64	58,5	cyclictest	1561983	-21	kworker/u8:2+events_unbound	08:31:21	1
1581524	99	64	57,5	cyclictest	1722207	-21	kworker/u8:0+events_unbound	10:56:21	1
1581524	99	64	57,5	cyclictest	1722207	-21	kworker/u8:0+events_unbound	10:56:21	1
1581524	99	63	59,3	cyclictest	1702885	-21	kworker/u8:2+events_unbound	09:31:21	1
1581524	99	63	58,4	cyclictest	1822014	-21	kworker/u8:1+events_unbound	11:36:24	1
1581524	99	60	56,3	cyclictest	1561983	-21	kworker/u8:2+events_unbound	08:01:24	1
1581524	99	60	54,5	cyclictest	1581387	-21	kworker/u8:3+flush-8:0	07:11:23	1
1581524	99	60	54,5	cyclictest	1561983	-21	kworker/u8:2+flush-8:0	07:41:22	1
1883233	2	59	0,1	sleep0	1883237	-21	grep	12:11:11	0
1581524	99	59	55,3	cyclictest	1561983	-21	kworker/u8:2+events_unbound	07:26:15	1
1581524	99	58	54,3	cyclictest	1772696	-21	kworker/u8:3+events_unbound	10:21:21	1
1581524	99	58	53,4	cyclictest	1782614	-21	kworker/u8:2+events_unbound	12:31:19	1
1581524	99	58	52,5	cyclictest	1598272	-21	kworker/u8:1+events_unbound	09:06:20	1
1581524	99	58	52,4	cyclictest	1561983	-21	kworker/u8:2+events_unbound	08:06:17	1
1581521	99	57	47,8	cyclictest	1905629	-21	ntpq	12:31:14	0
1581524	99	56	52,3	cyclictest	1657659	-21	kworker/u8:3+events_unbound	09:51:20	1
1581524	99	56	51,4	cyclictest	1561983	-21	kworker/u8:2+events_unbound	08:21:18	1
1581524	99	56	50,4	cyclictest	1871154	-21	kworker/u8:0+events_unbound	12:06:16	1
1581524	99	56	50,4	cyclictest	1782614	-21	kworker/u8:2+events_unbound	11:21:06	1
1843255	2	55	0,3	chrt	0	-21	swapper/2	11:31:12	2
1581524	99	55	51,3	cyclictest	1747251	-21	kworker/u8:1+events_unbound	10:31:22	1
1581524	99	55	50,4	cyclictest	1603496	-21	kworker/u8:3+events_unbound	07:46:10	1
1581521	99	55	45,7	cyclictest	1732405	-21	latency_hist	09:40:01	0
1581524	99	54	49,4	cyclictest	1702885	-21	kworker/u8:2+flush-8:0	09:16:18	1
1581524	99	54	48,4	cyclictest	1747251	-21	kworker/u8:1+events_unbound	10:01:21	1
1617208	2	53	0,2	chrt	47	1	rcuc/3	07:41:16	3
1581526	99	52	44,6	cyclictest	280	-21	systemd-journal	08:40:00	2
1581524	99	51	45,4	cyclictest	1657659	-21	kworker/u8:3+events_unbound	08:56:10	1
1581524	99	51	45,4	cyclictest	1598272	-21	kworker/u8:1+flush-8:0	08:16:18	1
1581521	99	51	43,6	cyclictest	1702513	-21	base64	09:10:01	0
1581524	99	50	46,3	cyclictest	1722207	-21	kworker/u8:0+flush-8:0	11:31:23	1
1581524	99	50	45,3	cyclictest	1822014	-21	kworker/u8:1+events_unbound	12:16:20	1
1581524	99	50	44,5	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	09:11:20	1
1581521	99	50	40,7	cyclictest	1821996	-21	latency_hist	11:10:01	0
1581524	99	49	45,3	cyclictest	1747251	-21	kworker/u8:1+flush-8:0	10:46:08	1
1581524	99	49	45,3	cyclictest	1722207	-21	kworker/u8:0+flush-8:0	10:11:24	1
1581524	99	49	44,3	cyclictest	1657659	-21	kworker/u8:3+events_unbound	09:56:20	1
1581524	99	49	43,4	cyclictest	1772696	-21	kworker/u8:3+events_unbound	10:26:06	1
1581524	99	49	43,4	cyclictest	1598272	-21	kworker/u8:1+events_unbound	07:31:26	1
1581524	99	48	44,3	cyclictest	1747251	-21	kworker/u8:1+events_unbound	10:41:06	1
1581524	99	48	43,4	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	09:01:18	1
1581524	99	48	42,5	cyclictest	1702885	-21	kworker/u8:2+flush-8:0	09:36:18	1
1581524	99	48	42,4	cyclictest	1782614	-21	kworker/u8:2+events_unbound	12:21:17	1
1581524	99	46	40,4	cyclictest	1846687	-21	kworker/u8:3+flush-8:0	11:41:25	1
1581524	99	46	40,4	cyclictest	1782614	-21	kworker/u8:2+events_unbound	12:11:22	1
1581524	99	46	39,5	cyclictest	1822014	-21	kworker/u8:1+flush-8:0	12:36:17	1
1581524	99	46	39,5	cyclictest	1822014	-21	kworker/u8:1+flush-8:0	11:51:22	1
1581521	99	46	41,3	cyclictest	1544842	-21	kworker/u8:0+flush-8:0	07:16:08	0
1581521	99	46	39,5	cyclictest	1561983	-21	kworker/u8:2+flush-8:0	08:01:21	0
1581521	99	46	36,8	cyclictest	1752712	-21	/usr/sbin/munin	10:01:14	0
1581524	99	45	39,4	cyclictest	1822014	-21	kworker/u8:1+events_unbound	11:56:18	1
1581524	99	45	39,4	cyclictest	1603496	-21	kworker/u8:3+flush-8:0	07:56:22	1
1581524	99	45	38,5	cyclictest	1822014	-21	kworker/u8:1+events_unbound	11:46:06	1
1581521	99	45	40,3	cyclictest	1722207	-21	kworker/u8:0+flush-8:0	10:51:23	0
1581521	99	45	40,3	cyclictest	1722207	-21	kworker/u8:0+flush-8:0	10:51:22	0
1581521	99	45	37,5	cyclictest	1801307	-21	ntpq	10:46:18	0
1581524	99	44	39,4	cyclictest	1747251	-21	kworker/u8:1+events_unbound	10:36:19	1
1581524	99	44	39,3	cyclictest	1762273	-21	kworker/u8:2+events_unbound	10:16:06	1
1581524	99	44	38,4	cyclictest	1603496	-21	kworker/u8:3+events_unbound	07:36:22	1
1581524	99	44	37,5	cyclictest	1822014	-21	kworker/u8:1+flush-8:0	12:26:17	1
1581521	99	44	35,6	cyclictest	1876382	-21	latency_hist	12:05:01	0
1581526	99	43	37,4	cyclictest	1881314	-21	apt-get	12:10:00	2
1581524	99	43	38,4	cyclictest	1544842	-21	kworker/u8:0+flush-8:0	07:21:25	1
1581524	99	43	38,3	cyclictest	1782614	-21	kworker/u8:2+events_unbound	11:16:16	1
1581524	99	43	37,5	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	08:46:18	1
1581524	99	43	37,4	cyclictest	1561983	-21	kworker/u8:2+flush-8:0	08:26:20	1
1581524	99	43	36,5	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	09:41:19	1
1581524	99	43	36,5	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	09:26:17	1
1581524	99	43	36,5	cyclictest	1581363	-21	latency_hist	07:10:01	1
1581524	99	43	35,5	cyclictest	280	-21	systemd-journal	11:01:37	1
1581521	99	43	34,7	cyclictest	1832187	-21	/usr/sbin/munin	11:21:14	0
1581524	99	42	38,3	cyclictest	1561983	-21	kworker/u8:2+events_unbound	08:11:15	1
1581524	99	42	37,4	cyclictest	1561983	-21	kworker/u8:2+events_unbound	07:51:15	1
1581524	99	42	37,3	cyclictest	1722207	-21	kworker/u8:0+events_unbound	10:51:18	1
1581524	99	42	37,3	cyclictest	1722207	-21	kworker/u8:0+events_unbound	10:51:18	1
1581524	99	41	37,3	cyclictest	1822014	-21	kworker/u8:1+flush-8:0	12:01:18	1
1581521	99	41	37,3	cyclictest	1561983	-21	kworker/u8:2+flush-8:0	08:06:20	0
1581521	99	41	30,9	cyclictest	1628627	-21	diskstats	07:56:06	0
1581521	99	41	29,9	cyclictest	1822572	-21	diskstats	11:11:07	0
1581524	99	40	35,3	cyclictest	1598272	-21	kworker/u8:1+events_unbound	08:41:11	1
1581524	99	40	35,3	cyclictest	1598272	-21	kworker/u8:1+events_unbound	08:41:11	1
1581521	99	40	35,4	cyclictest	1782614	-21	kworker/u8:2+events_unbound	11:26:22	0
1581521	99	40	34,5	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	08:51:08	0
1581521	99	39	36,2	cyclictest	1747251	-21	kworker/u8:1+flush-8:0	10:41:17	0
1581521	99	39	34,3	cyclictest	1667809	-21	kworker/u8:0+flush-8:0	09:01:24	0
1581521	99	39	33,4	cyclictest	1561983	-21	kworker/u8:2+events_unbound	07:26:10	0
1581521	99	39	30,7	cyclictest	1741413	-21	ntpq	09:46:17	0
1581524	99	38	34,3	cyclictest	1782614	-21	kworker/u8:2+events_unbound	11:11:12	1
1581524	99	38	33,4	cyclictest	1657659	-21	kworker/u8:3+flush-8:0	09:21:25	1
1581524	99	38	31,5	cyclictest	1782614	-21	kworker/u8:2+flush-8:0	11:26:18	1
1581521	99	38	33,3	cyclictest	1822014	-21	kworker/u8:1+flush-8:0	12:26:13	0
1581521	99	38	32,4	cyclictest	280	-21	systemd-journal	11:00:00	0
1581521	99	38	32,4	cyclictest	280	-21	systemd-journal	11:00:00	0
1581521	99	38	32,4	cyclictest	1608185	-21	latency_hist	07:35:01	0
1581521	99	38	32,4	cyclictest	1598272	-21	kworker/u8:1+events_unbound	08:41:19	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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