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 Mon Jun 22, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
489294	2	59	48,8	sleep4	0	-21	swapper/4	07:05:19	4
489457	2	54	44,7	sleep5	0	-21	swapper/5	07:07:37	5
6414	89	45	0,38	rtkit-daemon	0	-21	swapper/6	07:08:27	6
489459	2	41	5,31	sleep7	0	-21	swapper/7	07:07:39	7
489874	99	37	35,2	cyclictest	752257	-21	kworker/u16:2+events_unbound	09:37:34	5
489874	99	37	35,2	cyclictest	609716	-21	kworker/u16:3+flush-8:0	09:44:54	5
489874	99	36	34,2	cyclictest	975943	-21	kworker/u16:0+events_unbound	11:11:34	5
489874	99	36	34,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:34:06	5
489874	99	36	34,2	cyclictest	1036383	-21	kworker/u16:2+events_unbound	11:41:38	5
489874	99	36	34,2	cyclictest	1036383	-21	kworker/u16:2+events_unbound	11:21:34	5
489874	99	35	32,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:09:49	5
489874	99	34	32,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:14:42	5
489874	99	34	32,2	cyclictest	1086113	-21	kworker/u16:3+events_unbound	11:37:49	5
489874	99	34	31,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:29:41	5
489874	99	33	32,1	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:00:53	5
489874	99	33	32,1	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:00:53	5
489874	99	33	31,2	cyclictest	935214	-21	kworker/u16:4+flush-8:0	10:47:34	5
489874	99	33	31,2	cyclictest	935214	-21	kworker/u16:4+events_unbound	10:37:34	5
489874	99	33	31,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:20:26	5
489874	99	33	31,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:16:53	5
489874	99	33	31,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:06:50	5
489874	99	32	31,1	cyclictest	960514	-21	kworker/u16:0+events_unbound	10:42:13	5
489874	99	32	30,2	cyclictest	935214	-21	kworker/u16:4+events_unbound	10:49:41	5
489874	99	32	30,2	cyclictest	849774	-21	kworker/u16:2+flush-8:0	10:30:26	5
489874	99	32	30,2	cyclictest	1036383	-21	kworker/u16:2+events_unbound	11:31:46	5
489874	99	32	30,2	cyclictest	1036383	-21	kworker/u16:2+events_unbound	11:18:13	5
489874	99	32	30,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	12:10:45	5
489874	99	31	29,2	cyclictest	935214	-21	kworker/u16:4+events_unbound	11:06:02	5
489874	99	31	29,2	cyclictest	752257	-21	kworker/u16:2+events_unbound	09:27:55	5
489874	99	31	29,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:55:54	5
489874	99	31	29,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:55:54	5
489874	99	31	29,2	cyclictest	1184761	-21	kworker/u16:0+events_unbound	12:35:42	5
489874	99	31	29,2	cyclictest	1061432	-21	kworker/u16:0+events_unbound	11:25:50	5
489874	99	31	29,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	11:49:09	5
489874	99	30	28,2	cyclictest	925259	-21	kworker/u16:3+events_unbound	11:02:50	5
489874	99	30	28,2	cyclictest	849774	-21	kworker/u16:2+events_unbound	10:03:18	5
489874	99	30	28,2	cyclictest	813927	-21	kworker/u16:0+events_unbound	09:53:35	5
489874	99	30	28,2	cyclictest	752257	-21	kworker/u16:2+events_unbound	09:21:38	5
489874	99	30	28,2	cyclictest	659723	-21	kworker/u16:1+events_unbound	09:11:25	5
489874	99	30	28,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	11:51:38	5
489874	99	29	27,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:28:50	5
489874	99	29	27,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	10:06:10	5
911924	2	28	0,1	chrt	911925	-21	sh	10:22:57	7
489874	99	28	26,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:44:38	5
489874	99	28	26,2	cyclictest	1209337	-21	kworker/u16:2+events_unbound	12:25:09	5
489874	99	28	26,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	12:15:46	5
489874	99	28	24,3	cyclictest	571898	-21	kworker/u16:4+events_unbound	08:19:59	5
1083374	2	28	0,1	chrt	1083372	-21	ssh	11:30:21	7
489874	99	27	25,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	09:00:01	5
489871	99	27	25,2	cyclictest	849774	-21	kworker/u16:2+events_unbound	10:24:46	4
489874	99	26	24,2	cyclictest	935214	-21	kworker/u16:4+events_unbound	10:58:54	5
489874	99	26	24,2	cyclictest	609716	-21	kworker/u16:3+events_unbound	08:10:03	5
489874	99	26	24,2	cyclictest	571898	-21	kworker/u16:4+events_unbound	07:55:02	5
489874	99	26	24,2	cyclictest	571898	-21	kworker/u16:4+events_unbound	07:55:02	5
489874	99	26	24,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:21:49	5
489874	99	26	24,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	11:56:50	5
489874	99	26	24,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	11:56:50	5
666215	2	25	0,1	sleep4	65	-21	ksoftirqd/4	08:35:00	4
489871	99	25	23,2	cyclictest	813927	-21	kworker/u16:0+flush-8:0	09:55:05	4
489871	99	25	23,2	cyclictest	813927	-21	kworker/u16:0+flush-8:0	09:55:05	4
489871	99	25	23,2	cyclictest	571898	-21	kworker/u16:4+events_unbound	08:49:39	4
489871	99	25	23,2	cyclictest	1123126	-21	kworker/u16:4+events_unbound	11:49:54	4
489871	99	25	23,2	cyclictest	1086113	-21	kworker/u16:3+events_unbound	11:45:07	4
489871	99	25	21,3	cyclictest	752498	-21	cat	09:19:39	4
983909	2	24	0,1	chrt	983910	-21	sendmail_mailqu	10:50:06	7
489877	99	24	20,3	cyclictest	436276	-21	kworker/u16:2+flush-8:0	07:39:55	6
489874	99	24	21,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	08:24:50	5
489871	99	24	22,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	07:59:35	4
489871	99	24	22,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	07:59:35	4
489874	99	23	21,2	cyclictest	697363	-21	kworker/u16:2+flush-8:0	08:55:05	5
489871	99	23	21,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	07:49:55	4
489871	99	23	21,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	07:49:55	4
489871	99	22	20,2	cyclictest	925259	-21	kworker/u16:3+events_unbound	10:59:04	4
489871	99	22	20,2	cyclictest	554390	-21	kworker/u16:1+flush-8:0	07:44:55	4
489871	99	22	20,2	cyclictest	478452	-21	kworker/u16:3+flush-8:0	07:09:55	4
489871	99	22	20,2	cyclictest	459270	-21	kworker/u16:1+events_unbound	07:14:54	4
489871	99	22	20,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	11:59:54	4
489871	99	22	20,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	11:59:54	4
489871	99	22	20,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	11:10:02	4
489874	99	21	19,2	cyclictest	571898	-21	kworker/u16:4+flush-8:0	08:49:58	5
489871	99	21	19,2	cyclictest	947741	-21	kworker/u16:5+flush-8:0	10:44:35	4
489871	99	21	19,2	cyclictest	609716	-21	kworker/u16:3+flush-8:0	08:30:08	4
489871	99	21	19,2	cyclictest	1209337	-21	kworker/u16:2+events_unbound	12:34:45	4
489874	99	20	17,2	cyclictest	591554	-21	kworker/u16:1+flush-8:0	08:04:59	5
489874	99	20	17,2	cyclictest	512253	-21	kworker/u16:5+flush-8:0	07:30:00	5
489871	99	20	18,2	cyclictest	947741	-21	kworker/u16:5+flush-8:0	10:45:05	4
489871	99	20	18,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:19:54	4
489871	99	20	18,2	cyclictest	1086113	-21	kworker/u16:3+events_unbound	11:39:56	4
489871	99	20	17,2	cyclictest	826387	-21	kworker/u16:1+events_unbound	10:14:55	4
489880	99	19	17,1	cyclictest	571698	-21	turbostat	07:49:39	7
489874	99	19	17,2	cyclictest	708038	-21	kworker/u16:0+flush-8:0	09:04:49	5
489874	99	19	17,2	cyclictest	571898	-21	kworker/u16:4+events_unbound	08:40:01	5
489874	99	19	16,2	cyclictest	552638	-21	kworker/u16:0+flush-8:0	07:59:40	5
489871	99	19	17,2	cyclictest	813927	-21	kworker/u16:0+flush-8:0	09:50:01	4
489871	99	19	17,2	cyclictest	1036383	-21	kworker/u16:2+events_unbound	11:34:53	4
489871	99	19	17,2	cyclictest	1021565	-21	kworker/u16:1+events_unbound	11:16:56	4
489871	99	19	14,2	cyclictest	1145288	-21	kworker/u16:5+events_unbound	12:16:58	4
489880	99	18	0,16	cyclictest	934327	-21	ssh	10:30:04	7
489874	99	18	16,2	cyclictest	489762	-21	kworker/u16:0+events_unbound	07:16:51	5
489874	99	18	16,2	cyclictest	436276	-21	kworker/u16:2+flush-8:0	07:44:35	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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