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 Jan 23, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
670666	2	202	0,2	sleep3	653	-21	kworker/3:2-events	23:05:07	3
434591	99	76	59,14	cyclictest	517429	-21	latency_hist	20:35:00	1
522510	2	74	0,5	sleep2	0	-21	swapper/2	20:39:57	2
434586	99	69	60,6	cyclictest	558046	-21	latency_hist	21:15:01	0
434586	99	67	49,11	cyclictest	503232	-21	kworker/u8:1+events_unbound	21:50:03	0
652510	2	66	0,4	sleep3	0	-21	swapper/3	22:45:13	3
434586	99	61	52,6	cyclictest	688738	-21	latency_hist	23:25:01	0
434586	99	61	52,6	cyclictest	688738	-21	latency_hist	23:25:01	0
434586	99	60	52,6	cyclictest	456987	-21	kworker/u8:3+flush-8:0	19:40:02	0
434591	99	59	45,10	cyclictest	658435	-21	latency_hist	22:55:00	1
434586	99	58	51,5	cyclictest	713980	-21	latency_hist	23:50:00	0
434586	99	58	51,5	cyclictest	713980	-21	latency_hist	23:50:00	0
434586	99	58	51,4	cyclictest	503232	-21	kworker/u8:1+events_unbound	20:30:00	0
434586	99	58	49,7	cyclictest	698841	-21	diskstats	23:34:58	0
434591	99	57	47,7	cyclictest	728836	-21	latency_hist	00:05:00	1
434591	99	57	47,7	cyclictest	728836	-21	latency_hist	00:05:00	1
434586	99	56	50,4	cyclictest	647760	-21	kworker/u8:3+events_unbound	00:15:15	0
434586	99	56	48,6	cyclictest	647760	-21	kworker/u8:3+flush-8:0	23:05:14	0
701901	2	55	0,4	chrt	0	-21	swapper/3	23:35:05	3
434586	99	55	47,6	cyclictest	723864	-21	latency_hist	00:00:01	0
434586	99	55	47,6	cyclictest	723864	-21	latency_hist	00:00:00	0
434592	99	54	43,7	cyclictest	286	-21	systemd-journal	19:45:01	2
434586	99	54	49,3	cyclictest	542117	-21	kworker/u8:3+events_unbound	21:20:01	0
434586	99	54	43,8	cyclictest	286	-21	systemd-journal	22:30:00	0
434586	99	53	47,4	cyclictest	647760	-21	kworker/u8:3+events_unbound	00:30:03	0
434586	99	53	47,4	cyclictest	395585	-21	kworker/u8:3+flush-8:0	19:10:09	0
434586	99	53	46,5	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:00:09	0
434586	99	53	45,6	cyclictest	456987	-21	kworker/u8:3+flush-8:0	19:45:09	0
434586	99	52	47,4	cyclictest	647760	-21	kworker/u8:3+flush-8:0	00:25:21	0
434586	99	52	46,4	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:40:13	0
434586	99	51	46,4	cyclictest	414432	-21	kworker/u8:0+events_unbound	21:30:03	0
434586	99	51	46,3	cyclictest	404604	-21	kworker/u8:2+events_unbound	19:35:01	0
434586	99	51	43,6	cyclictest	647760	-21	kworker/u8:3+events_unbound	23:50:08	0
434586	99	51	43,6	cyclictest	647760	-21	kworker/u8:3+events_unbound	23:50:08	0
682012	2	50	0,2	sleep3	47	1	rcuc/3	23:15:06	3
434586	99	50	44,4	cyclictest	456987	-21	kworker/u8:3+events_unbound	20:20:00	0
578146	2	49	0,3	sleep3	653	-21	kworker/3:2-events	21:34:59	3
434586	99	49	43,4	cyclictest	456987	-21	kworker/u8:3+events_unbound	19:55:13	0
434592	99	47	40,5	cyclictest	542809	-21	gpgv	21:00:00	2
434586	99	47	42,3	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:55:02	0
434586	99	47	42,3	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:55:01	0
434586	99	47	41,4	cyclictest	672802	-21	kworker/u8:1+events_unbound	23:10:08	0
434586	99	47	41,4	cyclictest	637953	-21	kworker/u8:0+events_unbound	22:35:14	0
434586	99	47	38,3	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:49:18	0
434586	99	47	37,8	cyclictest	723256	-21	kworker/u8:0+events_unbound	00:20:11	0
434591	99	46	38,6	cyclictest	698994	-21	latency_hist	23:35:00	1
434586	99	46	42,3	cyclictest	698196	-21	kworker/u8:2+flush-8:0	23:40:16	0
434586	99	46	42,3	cyclictest	595159	-21	kworker/u8:3+events_unbound	21:55:16	0
434586	99	46	42,3	cyclictest	503232	-21	kworker/u8:1+flush-8:0	20:40:18	0
434586	99	46	41,3	cyclictest	404604	-21	kworker/u8:2+events_unbound	20:00:03	0
434586	99	46	40,5	cyclictest	492510	-21	kworker/u8:2+events_unbound	20:50:06	0
434586	99	46	38,3	cyclictest	414432	-21	kworker/u8:0+events_unbound	22:20:33	0
434586	99	46	37,3	cyclictest	542117	-21	kworker/u8:3+events_unbound	21:02:04	0
434592	99	45	39,4	cyclictest	492510	-21	kworker/u8:2+flush-8:0	20:30:14	2
434591	99	45	36,6	cyclictest	628354	-21	latency_hist	22:25:01	1
434586	99	45	40,3	cyclictest	456987	-21	kworker/u8:3+events_unbound	19:44:57	0
434586	99	45	34,4	cyclictest	414432	-21	kworker/u8:0+events_unbound	20:58:38	0
591791	2	44	0,2	sleep3	47	1	rcuc/3	21:45:06	3
434592	99	44	38,4	cyclictest	414432	-21	kworker/u8:0+flush-8:0	19:50:20	2
434591	99	44	35,6	cyclictest	286	-21	systemd-journal	20:25:00	1
434586	99	44	40,3	cyclictest	617570	-21	kworker/u8:2+events_unbound	22:15:15	0
434586	99	44	39,4	cyclictest	414432	-21	kworker/u8:0+flush-8:0	21:40:14	0
434586	99	44	38,4	cyclictest	414432	-21	kworker/u8:0+events_unbound	20:20:12	0
434586	99	44	35,3	cyclictest	723256	-21	kworker/u8:0+events_unbound	00:07:38	0
434586	99	44	35,3	cyclictest	414432	-21	kworker/u8:0+events_unbound	19:26:21	0
434586	99	44	33,8	cyclictest	532815	-21	latency_hist	20:50:01	0
434586	99	43	39,3	cyclictest	647760	-21	kworker/u8:3+events_unbound	23:39:58	0
434586	99	43	38,4	cyclictest	414432	-21	kworker/u8:0+events_unbound	21:20:19	0
434586	99	43	36,5	cyclictest	503232	-21	kworker/u8:1+flush-8:0	22:05:48	0
434586	99	43	34,3	cyclictest	492510	-21	kworker/u8:2+events_unbound	20:30:18	0
434038	2	43	5,32	sleep1	0	-21	swapper/1	19:09:57	1
434591	99	42	34,6	cyclictest	472200	-21	/usr/sbin/munin	19:50:15	1
434586	99	42	36,4	cyclictest	503232	-21	kworker/u8:1+events_unbound	22:30:17	0
434586	99	42	35,5	cyclictest	441719	-21	kworker/u8:1+events_unbound	19:20:10	0
434586	99	42	33,3	cyclictest	672802	-21	kworker/u8:1+events_unbound	23:25:13	0
434591	99	41	36,4	cyclictest	723256	-21	kworker/u8:0+flush-8:0	00:20:15	1
434586	99	41	36,3	cyclictest	503232	-21	kworker/u8:1+flush-8:0	22:10:15	0
434586	99	41	35,4	cyclictest	503232	-21	kworker/u8:1+events_unbound	21:35:18	0
434586	99	41	33,3	cyclictest	503232	-21	kworker/u8:1+events_unbound	20:35:18	0
434586	99	41	31,9	cyclictest	414432	-21	kworker/u8:0+flush-8:0	19:50:05	0
434586	99	40	36,3	cyclictest	662776	-21	kworker/u8:2+flush-8:0	23:00:13	0
434586	99	40	36,3	cyclictest	662776	-21	kworker/u8:2+flush-8:0	23:00:13	0
434586	99	40	32,3	cyclictest	723256	-21	kworker/u8:0+events_unbound	00:12:40	0
434586	99	40	32,3	cyclictest	647760	-21	kworker/u8:3+events_unbound	00:35:34	0
434586	99	40	31,7	cyclictest	434352	-21	latency_hist	19:10:01	0
434586	99	39	35,3	cyclictest	647760	-21	kworker/u8:3+events_unbound	22:53:34	0
434586	99	39	35,3	cyclictest	414432	-21	kworker/u8:0+flush-8:0	21:25:20	0
434586	99	39	32,5	cyclictest	456987	-21	kworker/u8:3+events_unbound	20:10:03	0
434586	99	39	31,3	cyclictest	503232	-21	kworker/u8:1+events_unbound	21:49:21	0
434586	99	39	31,3	cyclictest	414432	-21	kworker/u8:0+events_unbound	21:07:22	0
434591	99	38	32,4	cyclictest	286	-21	systemd-journal	00:30:00	1
434586	99	38	33,4	cyclictest	723256	-21	kworker/u8:0+events_unbound	00:05:01	0
434586	99	38	33,4	cyclictest	723256	-21	kworker/u8:0+events_unbound	00:05:00	0
434586	99	38	29,3	cyclictest	647760	-21	kworker/u8:3+events_unbound	23:17:02	0
434586	99	38	0,36	cyclictest	1	-21	systemd	19:15:05	0
434592	99	37	32,4	cyclictest	456987	-21	kworker/u8:3+flush-8:0	19:55:12	2
434591	99	37	29,5	cyclictest	618346	-21	latency_hist	22:15:01	1
434586	99	37	28,3	cyclictest	414432	-21	kworker/u8:0+events_unbound	20:05:02	0
434591	99	36	29,5	cyclictest	286	-21	systemd-journal	21:00:00	1
434591	99	36	28,6	cyclictest	512546	-21	latency_hist	20:30:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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