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 Fri Jun 05, 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
1139773	2	58	48,7	sleep4	0	-21	swapper/4	19:03:54	4
1139773	2	58	48,7	sleep4	0	-21	swapper/4	19:03:54	4
1139727	2	45	34,8	sleep5	0	-21	swapper/5	19:03:15	5
1139727	2	45	34,8	sleep5	0	-21	swapper/5	19:03:15	5
1140274	99	43	37,5	cyclictest	1163128	-21	latency_hist	19:16:36	7
1140269	99	43	41,2	cyclictest	1288467	-21	kworker/u16:1+flush-8:0	22:47:01	6
1140264	99	43	41,2	cyclictest	1122014	-21	kworker/u16:1+events_unbound	19:06:51	4
1139003	2	42	3,32	sleep7	0	-21	swapper/7	19:02:05	7
1139003	2	42	3,32	sleep7	0	-21	swapper/7	19:02:05	7
1140269	99	41	39,2	cyclictest	1675909	-21	kworker/u16:3+flush-8:0	23:57:01	6
1140269	99	38	36,2	cyclictest	1675909	-21	kworker/u16:3+events_unbound	00:31:55	6
1140269	99	38	36,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:31:16	6
1140269	99	38	36,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:19:15	6
1140269	99	38	36,2	cyclictest	1504019	-21	kworker/u16:3+events_unbound	22:53:14	6
1140269	99	38	36,2	cyclictest	1297911	-21	kworker/u16:4+events_unbound	21:57:38	6
1140269	99	38	36,2	cyclictest	1288467	-21	kworker/u16:1+events_unbound	22:40:18	6
1140269	99	38	36,2	cyclictest	1288467	-21	kworker/u16:1+events_unbound	22:26:39	6
1140269	99	37	35,2	cyclictest	1288467	-21	kworker/u16:1+events_unbound	22:04:59	6
1140269	99	37	34,2	cyclictest	1661456	-21	kworker/u16:0+flush-8:0	00:01:55	6
1140269	99	36	34,2	cyclictest	1675909	-21	kworker/u16:3+events_unbound	00:14:02	6
1140269	99	36	34,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:34:10	6
1140269	99	36	34,2	cyclictest	1504019	-21	kworker/u16:3+flush-8:0	22:46:30	6
1140269	99	36	34,2	cyclictest	1483437	-21	kworker/u16:2+flush-8:0	22:23:59	6
1140269	99	36	34,2	cyclictest	1230775	-21	kworker/u16:0+events_unbound	21:45:44	6
1140269	99	36	34,2	cyclictest	1230775	-21	kworker/u16:0+events_unbound	21:13:55	6
1140269	99	35	33,2	cyclictest	1759278	-21	kworker/u16:2+events_unbound	23:52:38	6
1140269	99	35	33,2	cyclictest	1759278	-21	kworker/u16:2+events_unbound	23:48:46	6
1140269	99	35	33,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:24:43	6
1140269	99	35	33,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	00:29:42	6
1140269	99	35	33,2	cyclictest	1297911	-21	kworker/u16:4+events_unbound	21:36:10	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:43:47	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:43:47	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:13:23	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:08:30	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:03:18	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	23:03:18	6
1140269	99	34	32,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	00:25:46	6
1140269	99	34	32,2	cyclictest	1483437	-21	kworker/u16:2+events_unbound	22:09:43	6
1140269	99	34	32,2	cyclictest	1230775	-21	kworker/u16:0+events_unbound	21:49:15	6
1140269	99	34	32,2	cyclictest	1230775	-21	kworker/u16:0+events_unbound	21:17:59	6
1140264	99	34	32,2	cyclictest	1483437	-21	kworker/u16:2+events_unbound	22:22:00	4
1140269	99	33	31,2	cyclictest	1641368	-21	kworker/u16:1+events_unbound	23:40:02	6
1140269	99	33	31,2	cyclictest	1297911	-21	kworker/u16:4+events_unbound	21:52:47	6
1140269	99	33	31,2	cyclictest	1230775	-21	kworker/u16:0+events_unbound	21:22:39	6
1140264	99	33	31,2	cyclictest	1675909	-21	kworker/u16:3+events_unbound	23:32:03	4
1758148	2	32	0,0	chrt	1758146	-21	ssh	23:43:31	7
1758148	2	32	0,0	chrt	1758146	-21	ssh	23:43:31	7
1140274	99	32	26,5	cyclictest	635	-21	systemd-journal	00:01:36	7
1140269	99	32	30,2	cyclictest	1661456	-21	kworker/u16:0+events_unbound	00:18:14	6
1140269	99	31	29,2	cyclictest	1483437	-21	kworker/u16:2+events_unbound	22:17:47	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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