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 Aug 01, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4081264	99	65	62,2	cyclictest	552778	-21	kworker/u16:4+events_unbound	00:24:05	4
4081276	99	52	50,2	cyclictest	575709	-21	kworker/u16:1+events_unbound	00:19:08	6
4080831	2	48	38,7	sleep5	0	-21	swapper/5	19:06:34	5
4081264	99	47	44,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:58:51	4
4081276	99	46	43,2	cyclictest	575709	-21	kworker/u16:1+events_unbound	00:24:19	6
4081264	99	46	44,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:29:04	4
4081278	99	45	39,5	cyclictest	8228	-21	latency_hist	20:08:50	7
4081276	99	45	43,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	23:24:07	6
4081271	99	44	42,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:44:15	5
4080880	2	43	33,7	sleep4	0	-21	swapper/4	19:07:13	4
4081278	99	42	37,4	cyclictest	234333	-21	latency_hist	21:53:49	7
4081276	99	42	39,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:34:11	6
4081276	99	41	39,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:14:23	6
4081271	99	41	38,2	cyclictest	47200	-21	kworker/u16:0+flush-8:0	23:49:15	5
4081271	99	41	38,2	cyclictest	47200	-21	kworker/u16:0+flush-8:0	23:49:15	5
4081264	99	41	39,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:08:51	4
4081264	99	41	38,2	cyclictest	552778	-21	kworker/u16:4+flush-8:0	00:14:04	4
4081278	99	40	35,4	cyclictest	246492	-21	latency_hist	21:58:50	7
4081271	99	40	37,2	cyclictest	439947	-21	kworker/u16:2+flush-8:0	23:59:22	5
4071703	2	40	3,31	sleep7	0	-21	swapper/7	19:03:55	7
4081276	99	39	37,2	cyclictest	47200	-21	kworker/u16:0+flush-8:0	23:40:23	6
4081271	99	39	37,2	cyclictest	575709	-21	kworker/u16:1+flush-8:0	00:34:14	5
4081271	99	39	37,2	cyclictest	552778	-21	kworker/u16:4+events_unbound	00:09:18	5
4081271	99	39	37,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:26:20	5
4081271	99	38	36,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	23:30:32	5
4081264	99	38	36,2	cyclictest	552778	-21	kworker/u16:4+events_unbound	00:19:24	4
4081264	99	38	36,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:19:40	4
548079	2	37	0,1	chrt	548077	-21	ssh	00:01:08	7
4081276	99	37	35,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	23:08:35	6
4081271	99	37	35,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:17:52	5
4081276	99	36	34,2	cyclictest	513053	-21	kworker/u16:1+flush-8:0	23:49:19	6
4081276	99	36	34,2	cyclictest	513053	-21	kworker/u16:1+flush-8:0	23:49:19	6
4081276	99	36	34,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:20:11	6
4081276	99	36	32,3	cyclictest	47200	-21	kworker/u16:0+flush-8:0	22:29:14	6
4081271	99	36	34,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:40:48	5
4081271	99	36	34,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:19:51	5
4081271	99	36	34,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	00:16:20	5
4081271	99	36	34,2	cyclictest	416676	-21	kworker/u16:5+events_unbound	23:17:07	5
4081264	99	36	34,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:59:51	4
4081264	99	36	34,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	23:39:08	4
4081264	99	36	34,2	cyclictest	316720	-21	kworker/u16:1+flush-8:0	23:35:47	4
4081278	99	35	30,4	cyclictest	404082	-21	latency_hist	23:03:49	7
4081276	99	35	33,2	cyclictest	619029	-21	kworker/u16:2+events_unbound	00:34:11	6
4081276	99	35	33,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:55:04	6
4081276	99	35	33,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	22:50:56	6
4081271	99	35	33,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:19:48	5
4081271	99	35	33,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:26:51	5
4081271	99	35	33,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	23:28:19	5
4081271	99	35	33,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	22:58:27	5
4081271	99	35	33,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	22:34:47	5
4081264	99	35	33,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:17:31	4
4081264	99	35	33,2	cyclictest	4081042	-21	kworker/u16:1+events_unbound	20:28:44	4
4081264	99	35	32,2	cyclictest	316720	-21	kworker/u16:1+flush-8:0	23:24:04	4
4081264	99	35	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	23:08:51	4
4081276	99	34	32,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:24:55	6
4081276	99	34	32,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:12:35	6
4081276	99	34	32,2	cyclictest	221970	-21	kworker/u16:1+events_unbound	22:06:24	6
4081276	99	34	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:25:32	6
4081276	99	34	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	21:55:32	6
4081271	99	34	32,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:40:15	5
4081271	99	34	32,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:59:36	5
4081271	99	34	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:51:31	5
4081271	99	34	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:20:48	5
4081264	99	34	32,2	cyclictest	546623	-21	kworker/u16:3+events_unbound	00:06:16	4
4081264	99	34	32,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:27:00	4
4081264	99	34	32,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	22:33:32	4
4081264	99	34	32,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	21:46:23	4
4081264	99	34	31,2	cyclictest	464753	-21	kworker/u16:4+events_unbound	23:54:03	4
4081276	99	33	31,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:46:12	6
4081276	99	33	31,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:02:16	6
4081276	99	33	31,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	23:59:16	6
4081276	99	33	31,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	22:41:31	6
4081276	99	33	31,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	23:01:51	6
4081276	99	33	31,2	cyclictest	137295	-21	kworker/u16:4+events_unbound	22:14:47	6
4081276	99	33	31,2	cyclictest	137226	-21	kworker/u16:3+events_unbound	21:34:47	6
4081276	99	33	30,2	cyclictest	513053	-21	kworker/u16:1+events_unbound	00:04:11	6
4081271	99	33	31,2	cyclictest	575709	-21	kworker/u16:1+events_unbound	00:29:20	5
4081271	99	33	31,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	23:37:44	5
4081271	99	33	31,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:46:20	5
4081271	99	33	31,2	cyclictest	439947	-21	kworker/u16:2+events_unbound	00:04:27	5
4081271	99	33	31,2	cyclictest	4081042	-21	kworker/u16:1+events_unbound	21:11:08	5
4081271	99	33	31,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	23:04:56	5
4081271	99	33	31,2	cyclictest	137295	-21	kworker/u16:4+events_unbound	21:25:57	5
4081264	99	33	31,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	22:57:39	4
4081264	99	33	31,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:53:40	4
4081276	99	32	30,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:31:24	6
4081276	99	32	30,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	00:32:27	6
4081276	99	32	30,2	cyclictest	439947	-21	kworker/u16:2+flush-8:0	23:33:31	6
4081276	99	32	30,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	21:45:55	6
4081276	99	32	30,2	cyclictest	137226	-21	kworker/u16:3+events_unbound	21:17:04	6
4081271	99	32	30,2	cyclictest	47200	-21	kworker/u16:0+events_unbound	21:29:56	5
4081271	99	32	30,2	cyclictest	464753	-21	kworker/u16:4+events_unbound	23:56:36	5
4081271	99	32	30,2	cyclictest	416676	-21	kworker/u16:5+events_unbound	23:13:48	5
4081271	99	32	30,2	cyclictest	3887042	-21	kworker/u16:3+events_unbound	19:26:00	5
4081271	99	32	30,2	cyclictest	316720	-21	kworker/u16:1+events_unbound	23:03:03	5
4081271	99	32	30,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	22:03:52	5
4081271	99	32	30,2	cyclictest	198109	-21	kworker/u16:2+events_unbound	21:57:56	5
4081271	99	32	30,2	cyclictest	137295	-21	kworker/u16:4+events_unbound	21:46:19	5
4081271	99	32	30,2	cyclictest	137226	-21	kworker/u16:3+events_unbound	21:35:28	5
4081271	99	32	30,2	cyclictest	137226	-21	kworker/u16:3+events_unbound	21:15:03	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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