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 50 highest latencies:

System rack0slot2.osadl.org (updated Sat May 09, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3907351	2	58	48,7	sleep4	0	-21	swapper/4	19:07:52	4
3907696	99	56	53,2	cyclictest	297740	-21	kworker/u16:1+flush-8:0	00:08:39	4
3898184	2	53	42,7	sleep5	0	-21	swapper/5	19:03:27	5
3907696	99	52	50,2	cyclictest	310695	-21	kworker/u16:2+events_unbound	00:03:50	4
3907699	99	48	46,2	cyclictest	345928	-21	kworker/u16:0+events_unbound	00:28:41	5
3907696	99	47	45,2	cyclictest	4036473	-21	kworker/u16:4+flush-8:0	20:18:50	4
3907705	99	46	40,5	cyclictest	4154185	-21	latency_hist	21:13:24	7
3907705	99	46	40,5	cyclictest	4154185	-21	latency_hist	21:13:24	7
3907699	99	45	43,2	cyclictest	310695	-21	kworker/u16:2+flush-8:0	00:03:37	5
3907699	99	45	42,2	cyclictest	345928	-21	kworker/u16:0+events_unbound	00:13:26	5
3907699	99	44	42,2	cyclictest	360564	-21	kworker/u16:3+flush-8:0	00:18:53	5
3907696	99	42	40,2	cyclictest	118306	-21	kworker/u16:2+flush-8:0	23:03:48	4
3907188	2	42	3,34	sleep7	0	-21	swapper/7	19:05:38	7
3907699	99	41	39,2	cyclictest	345928	-21	kworker/u16:0+events_unbound	00:34:03	5
3907699	99	41	39,2	cyclictest	345928	-21	kworker/u16:0+events_unbound	00:34:03	5
3907696	99	40	38,2	cyclictest	310695	-21	kworker/u16:2+events_unbound	23:48:18	4
3907700	99	39	37,2	cyclictest	3834554	-21	kworker/u16:4+events_unbound	19:53:39	6
3907705	99	38	32,5	cyclictest	239351	-21	latency_hist	23:08:24	7
3907699	99	38	36,2	cyclictest	360564	-21	kworker/u16:3+events_unbound	00:01:02	5
3907699	99	38	36,2	cyclictest	360564	-21	kworker/u16:3+events_unbound	00:01:02	5
3907699	99	38	36,2	cyclictest	310695	-21	kworker/u16:2+events_unbound	23:51:39	5
3907699	99	38	36,2	cyclictest	310695	-21	kworker/u16:2+events_unbound	00:10:46	5
3907699	99	38	36,2	cyclictest	118308	-21	kworker/u16:5+events_unbound	23:01:23	5
3907699	99	37	35,2	cyclictest	4178552	-21	kworker/u16:3+events_unbound	22:00:11	5
3907699	99	37	35,2	cyclictest	4141084	-21	kworker/u16:4+events_unbound	22:07:02	5
3907699	99	37	35,2	cyclictest	4141084	-21	kworker/u16:4+events_unbound	21:45:30	5
3907699	99	37	35,2	cyclictest	345928	-21	kworker/u16:0+events_unbound	23:55:22	5
3907699	99	37	35,2	cyclictest	227242	-21	kworker/u16:0+events_unbound	23:04:23	5
3907699	99	36	34,2	cyclictest	45997	-21	kworker/u16:1+events_unbound	22:21:39	5
3907699	99	36	34,2	cyclictest	4084837	-21	kworker/u16:0+events_unbound	21:10:39	5
3907699	99	36	34,2	cyclictest	4084837	-21	kworker/u16:0+events_unbound	21:10:39	5
3907699	99	36	34,2	cyclictest	360564	-21	kworker/u16:3+events_unbound	00:28:06	5
3907699	99	36	34,2	cyclictest	263973	-21	kworker/u16:3+events_unbound	23:46:22	5
3907699	99	36	34,2	cyclictest	227242	-21	kworker/u16:0+events_unbound	23:32:18	5
3907699	99	36	34,2	cyclictest	118308	-21	kworker/u16:5+events_unbound	22:54:35	5
3907699	99	36	34,2	cyclictest	118306	-21	kworker/u16:2+events_unbound	22:52:42	5
3907696	99	36	34,2	cyclictest	345928	-21	kworker/u16:0+flush-8:0	00:23:52	4
3907699	99	35	33,2	cyclictest	45997	-21	kworker/u16:1+events_unbound	22:14:43	5
3907699	99	35	33,2	cyclictest	4178552	-21	kworker/u16:3+events_unbound	21:38:59	5
3907699	99	35	33,2	cyclictest	4084837	-21	kworker/u16:0+events_unbound	20:48:24	5
3907699	99	35	33,2	cyclictest	3834554	-21	kworker/u16:4+events_unbound	19:50:35	5
3907699	99	35	33,2	cyclictest	227242	-21	kworker/u16:0+events_unbound	23:21:02	5
3907699	99	35	33,2	cyclictest	227242	-21	kworker/u16:0+events_unbound	23:21:02	5
3907699	99	35	33,2	cyclictest	118308	-21	kworker/u16:5+events_unbound	22:25:22	5
3907699	99	35	33,2	cyclictest	118306	-21	kworker/u16:2+events_unbound	22:31:02	5
3907696	99	35	33,2	cyclictest	297740	-21	kworker/u16:1+flush-8:0	23:58:50	4
3907696	99	35	33,2	cyclictest	297740	-21	kworker/u16:1+flush-8:0	23:58:50	4
3907696	99	35	33,2	cyclictest	118308	-21	kworker/u16:5+events_unbound	23:09:18	4
3907699	99	34	32,2	cyclictest	45997	-21	kworker/u16:1+events_unbound	21:52:30	5
3907699	99	34	32,2	cyclictest	4141084	-21	kworker/u16:4+events_unbound	22:13:07	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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