OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack0slot2.osadl.org (updated Sat Apr 11, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4100496	2	98	0,1	sleep7	4100495	-21	ssh	10:22:09	7
3671509	2	58	47,7	sleep5	0	-21	swapper/5	07:01:11	5
3671851	99	56	53,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	10:47:14	5
4119082	2	55	0,0	sleep7	4119083	-21	grep	10:27:22	7
3671856	99	54	52,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:22:29	6
3671851	99	54	52,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	09:27:28	5
3671490	2	54	44,7	sleep4	0	-21	swapper/4	07:00:54	4
3671303	2	53	43,7	sleep6	0	-21	swapper/6	06:58:15	6
3671856	99	51	48,2	cyclictest	4026863	-21	kworker/u16:5+events_unbound	10:07:13	6
3671851	99	51	49,2	cyclictest	52871	-21	kworker/u16:0+events_unbound	11:22:29	5
3671851	99	51	49,2	cyclictest	4112262	-21	kworker/u16:2+flush-8:0	11:27:28	5
3671851	99	51	49,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	12:27:16	5
3671851	99	50	48,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:02:29	5
3671851	99	50	48,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:02:29	5
3671851	99	49	46,2	cyclictest	3990344	-21	kworker/u16:4+events_unbound	09:57:13	5
3671851	99	48	45,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:07:13	5
3671861	99	47	39,7	cyclictest	650	-21	systemd-journal	08:36:59	7
3671856	99	47	45,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:02:13	6
3671851	99	47	45,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:22:29	5
3671851	99	47	45,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:22:29	5
3671856	99	46	44,2	cyclictest	4112262	-21	kworker/u16:2+flush-8:0	10:32:33	6
3671856	99	46	44,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:12:29	6
3671856	99	46	43,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	12:17:12	6
3671851	99	46	43,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:12:21	5
3671856	99	45	42,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:52:17	6
3671851	99	45	42,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:32:00	5
3671856	99	44	42,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	11:17:32	6
3671856	99	44	41,2	cyclictest	3941404	-21	kworker/u16:1+events_unbound	09:27:13	6
3671856	99	44	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:47:32	6
3671851	99	44	42,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:37:01	5
3671851	99	44	42,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	12:16:41	5
3671851	99	44	42,2	cyclictest	3990344	-21	kworker/u16:4+events_unbound	09:52:25	5
3671851	99	44	42,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:08:09	5
3671851	99	44	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:37:14	5
3671851	99	43	41,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:51:01	5
3671851	99	43	41,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:31:01	5
3671851	99	43	41,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:22:12	5
3671851	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:42:28	5
3671851	99	43	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:17:28	5
3671847	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:22:24	4
3671847	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:22:24	4
3671856	99	42	40,2	cyclictest	4174749	-21	kworker/u16:4+events_unbound	11:07:32	6
3671856	99	42	39,2	cyclictest	3913849	-21	kworker/u16:1+events_unbound	09:07:01	6
3671851	99	42	40,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:17:15	5
3671861	99	41	34,6	cyclictest	174456	-21	latency_hist	12:11:59	7
3671856	99	41	39,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	10:42:28	6
3671856	99	41	39,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	10:42:28	6
3671856	99	41	39,2	cyclictest	3941404	-21	kworker/u16:1+events_unbound	09:19:08	6
3671856	99	41	39,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	11:59:41	6
3671856	99	41	38,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	10:57:16	6
3671856	99	41	38,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:37:14	6
3671851	99	41	39,2	cyclictest	4174749	-21	kworker/u16:4+flush-8:0	10:52:59	5
3671851	99	41	39,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:06:37	5
3671851	99	41	39,2	cyclictest	3713695	-21	kworker/u16:0+flush-8:0	07:51:59	5
3671851	99	41	39,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	11:42:34	5
3671851	99	41	39,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	12:20:41	5
3671851	99	40	38,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	09:32:20	5
3671851	99	40	38,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:12:12	5
3671851	99	40	38,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	11:59:45	5
3671427	2	40	4,31	sleep7	0	-21	swapper/7	07:00:00	7
3671856	99	39	37,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:17:32	6
3671851	99	39	37,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:44:01	5
3671851	99	39	37,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:44:01	5
3671851	99	39	37,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:41:33	5
3671851	99	39	37,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	10:59:29	5
3671856	99	38	36,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	11:52:24	6
3671856	99	38	35,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:42:31	6
3671851	99	38	36,2	cyclictest	52871	-21	kworker/u16:0+events_unbound	11:32:19	5
3671851	99	38	36,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	12:22:11	5
3671851	99	38	36,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:47:13	5
3671851	99	38	36,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:11:52	5
3671856	99	37	35,2	cyclictest	4112262	-21	kworker/u16:2+flush-8:0	12:12:19	6
3671856	99	37	35,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:13:20	6
3671856	99	37	35,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	12:07:28	6
3671851	99	37	35,2	cyclictest	4026863	-21	kworker/u16:5+events_unbound	10:17:16	5
3671856	99	36	33,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:27:18	6
3671851	99	36	34,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:09:02	5
3671861	99	35	32,2	cyclictest	650	-21	systemd-journal	11:31:58	7
3671851	99	35	33,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	10:12:27	5
3671856	99	34	32,2	cyclictest	3941404	-21	kworker/u16:1+events_unbound	09:34:25	6
3671851	99	34	33,1	cyclictest	3990344	-21	kworker/u16:4+events_unbound	10:04:44	5
3671851	99	34	33,1	cyclictest	3990344	-21	kworker/u16:4+events_unbound	10:04:44	5
3671856	99	33	31,2	cyclictest	52871	-21	kworker/u16:0+events_unbound	11:39:56	6
3671856	99	33	31,2	cyclictest	52871	-21	kworker/u16:0+events_unbound	11:25:05	6
3671856	99	33	31,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:42:27	6
3671856	99	33	31,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:51:09	6
3671856	99	33	31,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:24:09	6
3671856	99	33	31,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:24:09	6
3671856	99	33	31,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:40:57	6
3671856	99	33	31,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:02:57	6
3671856	99	33	31,2	cyclictest	3681621	-21	kworker/u16:2+flush-8:0	07:21:59	6
3671856	99	33	30,2	cyclictest	3733009	-21	kworker/u16:3+events_unbound	09:12:14	6
3671851	99	33	31,2	cyclictest	3913849	-21	kworker/u16:1+events_unbound	09:05:45	5
3671851	99	33	31,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:56:16	5
3671851	99	33	29,3	cyclictest	3896141	-21	diskstats	08:57:13	5
3671847	99	33	31,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:02:25	4
3671847	99	33	31,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:02:25	4
3671847	99	33	30,2	cyclictest	3624024	-21	kworker/u16:1+events_unbound	07:07:05	4
3671856	99	32	30,2	cyclictest	2230377	-21	kworker/u16:3+flush-8:0	07:16:59	6
3671856	99	32	30,2	cyclictest	2230377	-21	kworker/u16:3+flush-8:0	07:16:59	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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