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 Tue Jun 09, 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
723862	2	58	48,7	sleep4	0	-21	swapper/4	07:04:30	4
991992	2	56	0,0	sleep7	991991	-21	rm	09:17:17	7
724297	99	42	0,40	cyclictest	1102639	-21	latency_hist	10:06:18	7
724288	99	41	39,2	cyclictest	1126899	-21	kworker/u16:3+events_unbound	12:24:40	5
724288	99	40	38,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:38:05	5
723699	2	40	3,31	sleep7	0	-21	swapper/7	07:02:08	7
724297	99	39	34,4	cyclictest	1391493	-21	latency_hist	12:06:17	7
724288	99	39	37,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:49:00	5
724288	99	39	37,2	cyclictest	1040629	-21	kworker/u16:1+events_unbound	09:52:37	5
724288	99	38	36,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	11:02:49	5
724288	99	38	36,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	10:57:18	5
724288	99	38	36,2	cyclictest	1259626	-21	kworker/u16:4+events_unbound	11:15:50	5
724288	99	38	36,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:57:32	5
724288	99	38	35,2	cyclictest	1063852	-21	kworker/u16:0+events_unbound	10:01:21	5
724287	99	38	35,2	cyclictest	1126899	-21	kworker/u16:3+flush-8:0	11:16:44	4
724288	99	37	35,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	10:47:36	5
724288	99	37	35,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	10:25:08	5
724288	99	37	35,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:43:08	5
724288	99	37	35,2	cyclictest	1063852	-21	kworker/u16:0+events_unbound	10:00:13	5
724288	99	37	35,2	cyclictest	1040629	-21	kworker/u16:1+events_unbound	09:38:21	5
724287	99	37	34,2	cyclictest	890129	-21	kworker/u16:4+events_unbound	08:51:33	4
724288	99	36	34,2	cyclictest	890129	-21	kworker/u16:4+events_unbound	09:27:05	5
724288	99	36	34,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	11:10:10	5
724288	99	36	34,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	09:12:37	5
724288	99	36	34,2	cyclictest	1126899	-21	kworker/u16:3+events_unbound	11:17:44	5
723807	2	36	28,5	sleep5	0	-21	swapper/5	07:03:43	5
724292	99	35	32,2	cyclictest	1063852	-21	kworker/u16:0+flush-8:0	09:56:18	6
724288	99	35	33,2	cyclictest	890129	-21	kworker/u16:4+events_unbound	09:36:01	5
724288	99	35	33,2	cyclictest	890129	-21	kworker/u16:4+events_unbound	09:36:01	5
724288	99	35	33,2	cyclictest	1414396	-21	kworker/u16:2+events_unbound	12:19:08	5
724288	99	35	33,2	cyclictest	1414396	-21	kworker/u16:2+events_unbound	12:15:56	5
724288	99	35	33,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:53:45	5
724288	99	35	33,2	cyclictest	1126899	-21	kworker/u16:3+events_unbound	12:09:08	5
724288	99	35	33,2	cyclictest	1126899	-21	kworker/u16:3+events_unbound	12:05:25	5
724288	99	35	33,2	cyclictest	1126899	-21	kworker/u16:3+events_unbound	10:28:13	5
724288	99	35	33,2	cyclictest	1063852	-21	kworker/u16:0+events_unbound	10:17:09	5
724288	99	35	32,2	cyclictest	715609	-21	kworker/u16:0+events_unbound	07:06:21	5
724287	99	35	32,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	09:36:40	4
724292	99	34	32,2	cyclictest	890129	-21	kworker/u16:4+flush-8:0	09:26:44	6
724288	99	34	32,2	cyclictest	890129	-21	kworker/u16:4+events_unbound	09:22:49	5
724288	99	34	32,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	10:55:37	5
724288	99	34	32,2	cyclictest	833110	-21	kworker/u16:1+flush-8:0	08:11:40	5
724288	99	34	32,2	cyclictest	833110	-21	kworker/u16:1+flush-8:0	08:11:40	5
724288	99	34	32,2	cyclictest	1414396	-21	kworker/u16:2+events_unbound	12:33:08	5
724288	99	34	32,2	cyclictest	1414396	-21	kworker/u16:2+events_unbound	12:30:41	5
724288	99	34	32,2	cyclictest	1063852	-21	kworker/u16:0+events_unbound	09:47:30	5
724288	99	33	31,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	10:07:48	5
724288	99	33	31,2	cyclictest	852947	-21	kworker/u16:2+events_unbound	09:07:01	5
724288	99	33	31,2	cyclictest	1174994	-21	kworker/u16:1+events_unbound	11:23:06	5
724288	99	33	31,2	cyclictest	1162716	-21	kworker/u16:0+events_unbound	10:38:00	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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