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 Wed Jan 21, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1243957	2	96	0,1	sleep7	1243958	-21	cat	21:17:37	7
981310	2	57	47,7	sleep5	0	-21	swapper/5	19:05:31	5
981247	2	56	22,30	sleep7	0	-21	swapper/7	19:04:37	7
981320	2	54	44,7	sleep6	0	-21	swapper/6	19:05:40	6
981755	99	53	50,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	21:22:33	6
981755	99	53	50,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	21:22:33	6
981747	99	48	45,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	21:27:35	4
981253	2	48	38,7	sleep4	0	-21	swapper/4	19:04:42	4
981755	99	47	44,2	cyclictest	1014737	-21	kworker/u16:4+events_unbound	19:42:35	6
981747	99	46	44,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:02:33	4
981747	99	46	44,2	cyclictest	1604994	-21	kworker/u16:2+events_unbound	00:32:51	4
981755	99	45	43,2	cyclictest	1337217	-21	kworker/u16:3+flush-8:0	22:22:35	6
981747	99	45	42,2	cyclictest	1458280	-21	kworker/u16:2+events_unbound	23:02:34	4
981755	99	44	42,2	cyclictest	1566131	-21	kworker/u16:4+events_unbound	23:32:50	6
981755	99	44	42,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:52:50	6
981755	99	44	42,2	cyclictest	1110992	-21	kworker/u16:0+events_unbound	21:12:33	6
981747	99	44	41,2	cyclictest	1471914	-21	kworker/u16:4+flush-8:0	23:07:35	4
981755	99	43	41,2	cyclictest	1337217	-21	kworker/u16:3+flush-8:0	22:48:22	6
981755	99	43	41,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	23:17:35	6
981755	99	43	40,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:17:47	6
981747	99	42	39,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:22:33	4
981755	99	41	39,2	cyclictest	1604994	-21	kworker/u16:2+flush-8:0	23:52:45	6
981755	99	41	39,2	cyclictest	1251256	-21	kworker/u16:2+events_unbound	21:43:45	6
981747	99	41	39,2	cyclictest	1265585	-21	kworker/u16:0+flush-8:0	21:52:46	4
981747	99	41	39,2	cyclictest	1197928	-21	kworker/u16:3+flush-8:0	21:22:54	4
981747	99	41	39,2	cyclictest	1197928	-21	kworker/u16:3+flush-8:0	21:22:54	4
981747	99	41	38,2	cyclictest	1251256	-21	kworker/u16:2+events_unbound	22:12:21	4
981755	99	40	38,2	cyclictest	1723598	-21	kworker/u16:0+events_unbound	00:34:58	6
981755	99	40	38,2	cyclictest	1604994	-21	kworker/u16:2+flush-8:0	00:02:54	6
981747	99	40	37,2	cyclictest	1651197	-21	kworker/u16:0+flush-8:0	00:07:35	4
981755	99	39	37,2	cyclictest	1651197	-21	kworker/u16:0+events_unbound	00:16:30	6
981755	99	39	37,2	cyclictest	1458280	-21	kworker/u16:2+events_unbound	23:02:44	6
981755	99	39	37,2	cyclictest	1110992	-21	kworker/u16:0+events_unbound	21:17:45	6
981754	99	39	36,2	cyclictest	1005098	-21	kworker/u16:0+flush-8:0	19:37:46	5
981747	99	39	37,2	cyclictest	1337217	-21	kworker/u16:3+flush-8:0	22:58:50	4
981747	99	39	37,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	22:02:50	4
981747	99	39	36,2	cyclictest	1565255	-21	kworker/u16:1+events_unbound	23:32:22	4
981755	99	38	36,2	cyclictest	1604908	-21	kworker/u16:1+events_unbound	00:30:29	6
981755	99	38	36,2	cyclictest	1590639	-21	kworker/u16:0+events_unbound	23:46:30	6
981755	99	38	36,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	23:11:30	6
981755	99	38	36,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:45:59	6
981755	99	38	36,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:45:59	6
981755	99	38	36,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:17:18	6
981755	99	38	36,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	22:05:05	6
981755	99	38	36,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	22:01:30	6
981755	99	38	36,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	21:41:14	6
981747	99	38	36,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	21:17:47	4
981747	99	38	36,2	cyclictest	1429625	-21	kworker/u16:1+events_unbound	22:32:50	4
981747	99	38	35,2	cyclictest	1197928	-21	kworker/u16:3+events_unbound	21:47:22	4
981755	99	37	35,2	cyclictest	1604994	-21	kworker/u16:2+events_unbound	00:21:31	6
981755	99	37	35,2	cyclictest	1604908	-21	kworker/u16:1+events_unbound	00:25:34	6
981755	99	37	35,2	cyclictest	1566131	-21	kworker/u16:4+events_unbound	23:49:34	6
981755	99	37	35,2	cyclictest	1458280	-21	kworker/u16:2+events_unbound	22:59:25	6
981755	99	37	35,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	23:59:17	6
981755	99	37	35,2	cyclictest	1014737	-21	kworker/u16:4+events_unbound	19:52:50	6
981747	99	37	34,2	cyclictest	1337217	-21	kworker/u16:3+flush-8:0	23:47:35	4
981755	99	36	34,2	cyclictest	1423775	-21	kworker/u16:0+events_unbound	22:39:46	6
981755	99	36	34,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	22:10:14	6
981755	99	36	34,2	cyclictest	1110992	-21	kworker/u16:0+events_unbound	20:42:33	6
981755	99	36	34,2	cyclictest	1110992	-21	kworker/u16:0+events_unbound	20:42:33	6
981747	99	36	34,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	21:59:19	4
981755	99	35	33,2	cyclictest	927801	-21	kworker/u16:2+flush-8:0	19:17:46	6
981755	99	35	33,2	cyclictest	1604994	-21	kworker/u16:2+events_unbound	00:09:01	6
981755	99	35	33,2	cyclictest	1590639	-21	kworker/u16:0+events_unbound	23:38:30	6
981755	99	35	33,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	23:28:26	6
981755	99	35	33,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	23:26:42	6
981755	99	35	33,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:33:33	6
981755	99	35	33,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:29:15	6
981755	99	35	33,2	cyclictest	1197928	-21	kworker/u16:3+events_unbound	21:33:39	6
981755	99	35	33,2	cyclictest	1197928	-21	kworker/u16:3+events_unbound	21:10:43	6
981747	99	35	33,2	cyclictest	1251256	-21	kworker/u16:2+events_unbound	21:43:19	4
981747	99	35	32,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	19:37:34	4
981760	99	34	30,3	cyclictest	124	-21	kswapd0	22:27:33	7
981760	99	34	29,4	cyclictest	1338315	-21	latency_hist	21:57:19	7
981755	99	34	32,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	21:28:30	6
981747	99	34	32,2	cyclictest	1565255	-21	kworker/u16:1+flush-8:0	23:37:35	4
981747	99	34	32,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:25:30	4
981747	99	34	32,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	00:01:06	4
981747	99	34	31,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:47:34	4
981747	99	34	31,2	cyclictest	1541962	-21	kworker/u16:0+flush-8:0	23:22:30	4
981755	99	33	31,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:39:31	6
981755	99	33	31,2	cyclictest	1471914	-21	kworker/u16:4+events_unbound	23:12:32	6
981755	99	33	31,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	21:49:03	6
981755	99	33	31,2	cyclictest	1005098	-21	kworker/u16:0+events_unbound	19:27:38	6
981754	99	33	31,2	cyclictest	1072529	-21	kworker/u16:2+flush-8:0	20:22:45	5
981747	99	33	31,2	cyclictest	1651197	-21	kworker/u16:0+events_unbound	00:13:29	4
981747	99	33	31,2	cyclictest	1604908	-21	kworker/u16:1+flush-8:0	00:22:29	4
1428009	2	33	0,0	chrt	1428012	-21	cut	22:32:39	7
981747	99	32	30,2	cyclictest	4181914	-21	kworker/u16:1+flush-8:0	20:57:50	4
981747	99	32	30,2	cyclictest	1651197	-21	kworker/u16:0+events_unbound	00:04:33	4
981747	99	32	30,2	cyclictest	1337352	-21	kworker/u16:4+events_unbound	22:27:51	4
981747	99	32	30,2	cyclictest	1265585	-21	kworker/u16:0+events_unbound	21:39:15	4
981760	99	31	29,1	cyclictest	1187198	-21	ntpq	20:47:45	7
981755	99	31	29,2	cyclictest	1337352	-21	kworker/u16:4+events_unbound	21:57:16	6
981754	99	31	29,2	cyclictest	1458280	-21	kworker/u16:2+flush-8:0	23:02:15	5
981754	99	31	28,3	cyclictest	4181914	-21	kworker/u16:1+flush-8:0	21:27:42	5
981747	99	31	29,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:42:44	4
981747	99	31	29,2	cyclictest	4181914	-21	kworker/u16:1+events_unbound	20:42:44	4
981747	99	31	29,2	cyclictest	1699383	-21	kworker/u16:3+events_unbound	00:30:07	4
981747	99	31	29,2	cyclictest	1337217	-21	kworker/u16:3+events_unbound	22:17:31	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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