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 Feb 21, 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
351905	2	64	53,7	sleep5	0	-21	swapper/5	19:01:53	5
351905	2	64	53,7	sleep5	0	-21	swapper/5	19:01:53	5
846953	2	56	0,0	sleep7	846952	-21	tr	22:50:39	7
352444	99	55	49,2	cyclictest	884950	-21	kworker/u16:1+events_unbound	23:45:29	4
352444	99	52	50,2	cyclictest	996384	-21	kworker/u16:4+events_unbound	00:10:41	4
352444	99	52	50,2	cyclictest	884950	-21	kworker/u16:1+flush-8:0	23:25:41	4
352444	99	52	50,2	cyclictest	766621	-21	kworker/u16:0+flush-8:0	22:50:16	4
352444	99	52	50,2	cyclictest	695341	-21	kworker/u16:2+events_unbound	22:15:41	4
352444	99	52	50,2	cyclictest	695341	-21	kworker/u16:2+events_unbound	22:15:41	4
352444	99	49	47,2	cyclictest	884950	-21	kworker/u16:1+events_unbound	23:10:18	4
352444	99	47	45,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	23:30:45	4
352444	99	47	44,2	cyclictest	932426	-21	kworker/u16:2+flush-8:0	23:55:31	4
352444	99	47	44,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	00:20:30	4
352450	99	45	43,2	cyclictest	932426	-21	kworker/u16:2+events_unbound	23:35:44	6
352450	99	45	43,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	22:20:44	6
352444	99	45	43,2	cyclictest	779060	-21	kworker/u16:5+events_unbound	22:25:45	4
352444	99	45	43,2	cyclictest	739371	-21	kworker/u16:1+events_unbound	22:10:46	4
352444	99	45	43,2	cyclictest	704988	-21	kworker/u16:4+events_unbound	22:20:30	4
352450	99	43	41,2	cyclictest	996384	-21	kworker/u16:4+events_unbound	00:05:33	6
352444	99	43	41,2	cyclictest	884950	-21	kworker/u16:1+events_unbound	23:15:41	4
352444	99	43	41,2	cyclictest	1066047	-21	kworker/u16:4+events_unbound	00:25:38	4
351866	2	43	33,7	sleep4	0	-21	swapper/4	19:01:19	4
351866	2	43	33,7	sleep4	0	-21	swapper/4	19:01:19	4
352450	99	42	40,2	cyclictest	971441	-21	kworker/u16:3+events_unbound	00:25:44	6
352450	99	42	40,2	cyclictest	932426	-21	kworker/u16:2+events_unbound	23:50:45	6
352444	99	42	40,2	cyclictest	932426	-21	kworker/u16:2+events_unbound	23:40:45	4
352444	99	42	40,2	cyclictest	932426	-21	kworker/u16:2+events_unbound	23:40:45	4
352444	99	42	40,2	cyclictest	670261	-21	kworker/u16:0+events_unbound	22:03:38	4
352446	99	40	38,2	cyclictest	352207	-21	kworker/u16:3+events_unbound	21:25:29	5
352444	99	40	38,2	cyclictest	670261	-21	kworker/u16:0+flush-8:0	21:50:41	4
352450	99	39	37,2	cyclictest	825287	-21	kworker/u16:1+events_unbound	22:46:49	6
352450	99	39	37,2	cyclictest	1056147	-21	kworker/u16:1+events_unbound	00:30:43	6
352450	99	39	36,2	cyclictest	1056147	-21	kworker/u16:1+events_unbound	00:24:18	6
352444	99	39	37,2	cyclictest	884950	-21	kworker/u16:1+events_unbound	23:38:13	4
352444	99	39	37,2	cyclictest	851213	-21	kworker/u16:2+events_unbound	23:05:29	4
352129	2	39	29,7	sleep6	0	-21	swapper/6	19:05:06	6
352129	2	39	29,7	sleep6	0	-21	swapper/6	19:05:06	6
352073	2	39	6,29	sleep7	0	-21	swapper/7	19:04:19	7
352073	2	39	6,29	sleep7	0	-21	swapper/7	19:04:19	7
352444	99	38	37,1	cyclictest	971441	-21	kworker/u16:3+events_unbound	00:18:58	4
352444	99	38	36,2	cyclictest	704988	-21	kworker/u16:4+events_unbound	22:05:19	4
352444	99	38	36,2	cyclictest	594499	-21	kworker/u16:1+events_unbound	21:41:07	4
352444	99	38	35,3	cyclictest	1056147	-21	kworker/u16:1+flush-8:0	00:30:46	4
352450	99	37	35,2	cyclictest	851213	-21	kworker/u16:2+events_unbound	22:59:53	6
352444	99	37	36,1	cyclictest	555749	-21	kworker/u16:1+events_unbound	20:45:45	4
352444	99	37	35,2	cyclictest	996384	-21	kworker/u16:4+events_unbound	00:04:01	4
352444	99	37	35,2	cyclictest	594499	-21	kworker/u16:1+events_unbound	21:27:09	4
352454	99	36	30,5	cyclictest	403867	-21	latency_hist	19:30:16	7
352454	99	36	30,5	cyclictest	403867	-21	latency_hist	19:30:16	7
352450	99	36	34,2	cyclictest	971441	-21	kworker/u16:3+events_unbound	23:47:32	6
352450	99	36	34,2	cyclictest	779060	-21	kworker/u16:5+flush-8:0	22:30:39	6
352450	99	36	34,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	23:09:16	6
352450	99	36	34,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	23:23:28	6
352450	99	36	34,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	22:50:48	6
352450	99	36	34,2	cyclictest	670261	-21	kworker/u16:0+flush-8:0	21:47:41	6
352444	99	36	35,1	cyclictest	766621	-21	kworker/u16:0+events_unbound	22:34:58	4
352444	99	36	34,2	cyclictest	851213	-21	kworker/u16:2+events_unbound	23:00:30	4
352444	99	36	34,2	cyclictest	352207	-21	kworker/u16:3+events_unbound	21:10:13	4
352450	99	35	33,2	cyclictest	695341	-21	kworker/u16:2+events_unbound	22:15:08	6
352444	99	35	33,2	cyclictest	779060	-21	kworker/u16:5+events_unbound	22:44:38	4
352450	99	34	32,2	cyclictest	851213	-21	kworker/u16:2+events_unbound	23:04:40	6
352450	99	34	32,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	23:33:55	6
352450	99	34	32,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	23:17:57	6
352450	99	34	32,2	cyclictest	739371	-21	kworker/u16:1+events_unbound	22:06:49	6
352450	99	34	31,2	cyclictest	375525	-21	kworker/u16:2+flush-8:0	19:50:17	6
352444	99	34	32,2	cyclictest	971441	-21	kworker/u16:3+events_unbound	23:55:13	4
352444	99	34	32,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	23:24:34	4
352444	99	34	32,2	cyclictest	670261	-21	kworker/u16:0+events_unbound	21:50:01	4
352444	99	34	32,2	cyclictest	557118	-21	kworker/u16:2+events_unbound	21:36:22	4
352444	99	34	32,2	cyclictest	557118	-21	kworker/u16:2+events_unbound	21:36:22	4
352444	99	34	32,2	cyclictest	352207	-21	kworker/u16:3+events_unbound	21:32:06	4
352450	99	33	31,2	cyclictest	932426	-21	kworker/u16:2+events_unbound	23:26:24	6
352450	99	33	31,2	cyclictest	779060	-21	kworker/u16:5+events_unbound	22:29:12	6
352450	99	33	31,2	cyclictest	766621	-21	kworker/u16:0+flush-8:0	23:40:32	6
352450	99	33	31,2	cyclictest	766621	-21	kworker/u16:0+flush-8:0	23:40:32	6
352450	99	33	31,2	cyclictest	704988	-21	kworker/u16:4+events_unbound	22:18:09	6
352450	99	33	31,2	cyclictest	704988	-21	kworker/u16:4+events_unbound	22:18:09	6
352450	99	33	31,2	cyclictest	704988	-21	kworker/u16:4+events_unbound	22:04:07	6
352450	99	33	31,2	cyclictest	352207	-21	kworker/u16:3+events_unbound	21:16:49	6
352450	99	33	31,2	cyclictest	323990	-21	kworker/u16:1+flush-8:0	19:05:38	6
352444	99	33	31,2	cyclictest	825287	-21	kworker/u16:1+events_unbound	22:56:16	4
352444	99	33	31,2	cyclictest	825287	-21	kworker/u16:1+events_unbound	22:51:01	4
352450	99	32	30,2	cyclictest	971441	-21	kworker/u16:3+events_unbound	00:17:08	6
352450	99	32	30,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	00:14:12	6
352450	99	32	29,2	cyclictest	594499	-21	kworker/u16:1+events_unbound	21:25:21	6
352444	99	32	30,2	cyclictest	996384	-21	kworker/u16:4+events_unbound	00:08:17	4
352444	99	32	30,2	cyclictest	670261	-21	kworker/u16:0+events_unbound	21:58:29	4
352444	99	32	30,2	cyclictest	557118	-21	kworker/u16:2+events_unbound	21:13:01	4
352450	99	31	29,2	cyclictest	695341	-21	kworker/u16:2+events_unbound	21:59:12	6
352446	99	31	29,2	cyclictest	670261	-21	kworker/u16:0+events_unbound	21:55:29	5
352446	99	31	29,2	cyclictest	352207	-21	kworker/u16:3+events_unbound	19:45:28	5
352444	99	31	29,2	cyclictest	779060	-21	kworker/u16:5+events_unbound	22:38:25	4
352444	99	31	29,2	cyclictest	480698	-21	kworker/u16:0+events_unbound	21:21:33	4
352454	99	30	22,7	cyclictest	470759	-21	latency_hist	20:05:16	7
352450	99	30	28,2	cyclictest	971441	-21	kworker/u16:3+events_unbound	00:02:07	6
352450	99	30	28,2	cyclictest	766621	-21	kworker/u16:0+events_unbound	22:39:08	6
352450	99	30	28,2	cyclictest	752042	-21	kworker/u16:3+events_unbound	23:14:40	6
352450	99	30	28,2	cyclictest	557118	-21	kworker/u16:2+flush-8:0	21:45:11	6
352450	99	30	28,2	cyclictest	480698	-21	kworker/u16:0+events_unbound	21:21:13	6
352450	99	30	28,2	cyclictest	480698	-21	kworker/u16:0+events_unbound	21:12:45	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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