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 Jun 04, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
230989	99	63	53,7	cyclictest	325487	-21	kworker/u8:1+flush-8:0	22:20:53	1
352008	2	61	0,5	sleep3	0	-21	swapper/3	22:05:43	3
230989	99	60	54,4	cyclictest	260300	-21	kworker/u8:2+events_unbound	20:45:46	1
230989	99	58	51,5	cyclictest	444870	-21	kworker/u8:3+flush-8:0	00:15:47	1
230989	99	58	47,7	cyclictest	444870	-21	kworker/u8:3+flush-8:0	00:20:53	1
230989	99	58	47,7	cyclictest	444870	-21	kworker/u8:3+flush-8:0	00:20:52	1
230989	99	57	48,6	cyclictest	479689	-21	kworker/u8:2+events_unbound	00:35:47	1
230989	99	57	46,7	cyclictest	444870	-21	kworker/u8:3+flush-8:0	00:10:49	1
230989	99	56	47,6	cyclictest	265642	-21	kworker/u8:0+events_unbound	20:05:47	1
230989	99	54	43,8	cyclictest	339937	-21	ntpq	21:50:45	1
230989	99	53	47,4	cyclictest	3574110	-21	kworker/u8:2+flush-8:0	19:15:36	1
230989	99	52	46,4	cyclictest	331226	-21	kworker/u8:0+flush-8:0	22:25:37	1
230989	99	52	45,5	cyclictest	331226	-21	kworker/u8:0+events_unbound	22:45:45	1
230989	99	51	42,6	cyclictest	320633	-21	gpgv	21:35:01	1
230989	99	50	46,3	cyclictest	260300	-21	kworker/u8:2+events_unbound	20:55:46	1
230989	99	50	44,5	cyclictest	444870	-21	kworker/u8:3+events_unbound	00:30:49	1
230989	99	50	43,5	cyclictest	450040	-21	kworker/u8:2+flush-8:0	23:55:52	1
230989	99	50	42,6	cyclictest	380241	-21	kworker/u8:2+flush-8:0	22:40:50	1
230989	99	49	45,3	cyclictest	450040	-21	kworker/u8:2+events_unbound	23:50:41	1
230989	99	49	43,5	cyclictest	410538	-21	kworker/u8:1+flush-8:0	23:40:47	1
230989	99	49	43,4	cyclictest	465210	-21	kworker/u8:0+events_unbound	00:05:51	1
230989	99	48	43,4	cyclictest	331226	-21	kworker/u8:0+events_unbound	23:10:49	1
230989	99	48	39,7	cyclictest	249402	-21	/usr/sbin/munin	19:35:42	1
230989	99	47	42,3	cyclictest	410538	-21	kworker/u8:1+events_unbound	23:35:41	1
230989	99	47	40,5	cyclictest	325487	-21	kworker/u8:1+flush-8:0	22:00:49	1
230989	99	47	40,4	cyclictest	380241	-21	kworker/u8:2+flush-8:0	23:20:48	1
230989	99	47	39,6	cyclictest	298412	-21	kworker/u8:1+flush-8:0	21:05:44	1
230988	99	47	37,8	cyclictest	459086	-21	ntpq	23:50:47	0
230988	99	47	36,8	cyclictest	1704890	-21	systemd-journal	22:55:01	0
302554	2	46	0,3	chrt	75	-21	kworker/3:1-events	21:05:40	3
230994	99	46	40,4	cyclictest	464938	-40	logrotate	00:00:00	2
230989	99	46	37,7	cyclictest	424077	-21	ntpq	23:15:45	1
230989	99	45	37,6	cyclictest	1704890	-21	systemd-journal	23:30:00	1
230989	99	44	35,6	cyclictest	1704890	-21	systemd-journal	23:06:16	1
230988	99	44	35,7	cyclictest	430532	-21	kworker/u8:0+flush-8:0	23:30:47	0
230989	99	43	35,6	cyclictest	331226	-21	kworker/u8:0+flush-8:0	22:15:48	1
230989	99	43	32,9	cyclictest	379583	-21	ntpq	22:30:46	1
230989	99	42	36,4	cyclictest	265642	-21	kworker/u8:0+events_unbound	20:35:48	1
230989	99	42	36,4	cyclictest	265642	-21	kworker/u8:0+events_unbound	20:35:47	1
230989	99	41	36,4	cyclictest	450040	-21	kworker/u8:2+flush-8:0	23:45:48	1
230988	99	40	33,4	cyclictest	230792	-21	latency_hist	19:10:02	0
230989	99	39	34,3	cyclictest	230854	-21	kworker/u8:3+flush-8:0	21:25:40	1
230988	99	39	32,5	cyclictest	449797	-21	cron	23:45:00	0
230994	99	38	32,4	cyclictest	331226	-21	kworker/u8:0+flush-8:0	22:35:46	2
230994	99	38	32,4	cyclictest	331226	-21	kworker/u8:0+flush-8:0	22:35:46	2
230989	99	38	33,3	cyclictest	298412	-21	kworker/u8:1+flush-8:0	21:15:47	1
230989	99	38	33,3	cyclictest	243220	-21	kworker/u8:1+flush-8:0	19:55:32	1
230989	99	38	32,4	cyclictest	310923	-21	kworker/u8:2+events_unbound	21:40:52	1
230988	99	38	30,6	cyclictest	484972	-21	latency_hist	00:20:00	0
230994	99	37	33,3	cyclictest	230854	-21	kworker/u8:3+flush-8:0	21:35:53	2
230989	99	37	29,6	cyclictest	230854	-21	kworker/u8:3+events_unbound	21:55:46	1
230988	99	37	0,31	cyclictest	365626	-21	kworker/0:1+events	23:05:29	0
230989	99	36	32,3	cyclictest	243220	-21	kworker/u8:1+flush-8:0	19:25:42	1
230989	99	36	31,3	cyclictest	385394	-21	systemd-run	22:40:00	1
230989	99	36	31,3	cyclictest	385394	-21	systemd-run	22:40:00	1
230989	99	36	31,3	cyclictest	260300	-21	kworker/u8:2+events_unbound	20:25:38	1
230989	99	36	28,6	cyclictest	275567	-21	ntpq	20:15:46	1
230988	99	36	31,3	cyclictest	265273	-21	systemd-run	20:00:01	0
230988	99	36	30,4	cyclictest	331226	-21	kworker/u8:0+flush-8:0	21:50:50	0
230988	99	36	2,29	cyclictest	221042	-21	kworker/0:2+events	20:55:11	0
229735	2	36	2,5	sleep1	226184	-21	/usr/sbin/munin	19:05:44	1
230989	99	35	30,3	cyclictest	230854	-21	kworker/u8:3+events_unbound	19:45:43	1
230989	99	35	28,5	cyclictest	331226	-21	kworker/u8:0+events_unbound	22:55:37	1
230989	99	35	26,7	cyclictest	399271	-21	ntpq	22:50:46	1
230989	99	35	26,7	cyclictest	355698	-21	latency_hist	22:10:01	1
230988	99	35	30,4	cyclictest	444870	-21	kworker/u8:3+flush-8:0	00:04:59	0
230988	99	35	2,28	cyclictest	221042	-21	kworker/0:2+events	20:42:15	0
230994	99	34	28,4	cyclictest	305500	-21	kworker/u8:0+flush-8:0	21:30:39	2
230994	99	34	24,8	cyclictest	419140	-21	ntpq	23:10:47	2
230988	99	34	2,31	cyclictest	365626	-21	kworker/0:1+events	23:37:23	0
230988	99	34	2,31	cyclictest	365626	-21	kworker/0:1+events	22:41:13	0
230988	99	34	2,31	cyclictest	365626	-21	kworker/0:1+events	00:08:41	0
230988	99	34	2,30	cyclictest	221042	-21	kworker/0:2+events	20:28:47	0
230988	99	34	2,28	cyclictest	221042	-21	kworker/0:2+events	19:52:27	0
230988	99	34	2,26	cyclictest	221042	-21	kworker/0:2+events	21:35:02	0
230988	99	34	1,32	cyclictest	365626	-21	kworker/0:1+events	00:26:39	0
230988	99	34	1,28	cyclictest	221042	-21	kworker/0:2+events	19:43:37	0
230989	99	33	27,4	cyclictest	430532	-21	kworker/u8:0+flush-8:0	23:30:41	1
230988	99	33	9,20	cyclictest	365626	-21	kworker/0:1+events	23:00:11	0
230988	99	33	29,3	cyclictest	331226	-21	kworker/u8:0+flush-8:0	22:15:52	0
230988	99	33	25,5	cyclictest	298412	-21	kworker/u8:1+flush-8:0	21:05:42	0
230988	99	33	24,6	cyclictest	464922	-21	latency_hist	00:00:01	0
230988	99	33	2,30	cyclictest	365626	-21	kworker/0:1+events	23:24:23	0
230988	99	33	2,30	cyclictest	221042	-21	kworker/0:2+events	22:02:57	0
230988	99	33	2,26	cyclictest	221042	-21	kworker/0:2+events	20:01:44	0
230988	99	33	1,31	cyclictest	365626	-21	kworker/0:1+events	23:48:50	0
230988	99	33	1,31	cyclictest	221042	-21	kworker/0:2+events	21:57:14	0
230988	99	33	1,27	cyclictest	365626	-21	kworker/0:1+events	22:25:28	0
230988	99	33	1,26	cyclictest	221042	-21	kworker/0:2+events	20:35:29	0
230988	99	33	1,26	cyclictest	221042	-21	kworker/0:2+events	20:35:28	0
230989	99	32	26,4	cyclictest	3574110	-21	kworker/u8:2+events_unbound	19:10:49	1
230988	99	32	2,29	cyclictest	365626	-21	kworker/0:1+events	00:12:43	0
230988	99	32	2,29	cyclictest	221042	-21	kworker/0:2+events	21:44:27	0
230988	99	32	2,29	cyclictest	221042	-21	kworker/0:2+events	20:48:40	0
230988	99	32	2,25	cyclictest	221042	-21	kworker/0:2+events	19:30:25	0
230988	99	32	1,30	cyclictest	365626	-21	kworker/0:1+events	00:39:27	0
230988	99	32	1,30	cyclictest	365626	-21	kworker/0:1+events	00:33:04	0
230988	99	32	1,30	cyclictest	221042	-21	kworker/0:2+events	21:24:32	0
230988	99	32	1,27	cyclictest	221042	-21	kworker/0:2+events	21:00:45	0
230988	99	32	1,26	cyclictest	221042	-21	kworker/0:2+events	21:12:29	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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