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 Thu Jan 22, 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
1414012	2	110	0,1	sleep5	0	-21	swapper/5	10:27:47	5
1607873	2	99	0,1	sleep7	1607876	-21	cut	11:57:33	7
1598310	2	97	0,1	sleep4	0	-21	swapper/4	11:52:33	4
1332220	2	65	0,1	sleep6	0	-21	swapper/6	09:57:26	6
973066	2	64	52,8	sleep5	0	-21	swapper/5	07:02:17	5
982229	2	61	51,7	sleep4	0	-21	swapper/4	07:06:01	4
973067	2	58	47,7	sleep6	0	-21	swapper/6	07:02:18	6
982018	2	54	19,31	sleep7	0	-21	swapper/7	07:02:59	7
982618	99	50	48,2	cyclictest	1169796	-21	kworker/u16:1+flush-8:0	09:02:29	4
982627	99	49	46,2	cyclictest	1308310	-21	smartctl	09:47:30	7
982627	99	48	45,2	cyclictest	1558486	-21	hwlatdetect	11:37:28	7
982627	99	44	42,1	cyclictest	1405974	-21	/usr/sbin/munin	10:27:30	7
982627	99	43	38,4	cyclictest	1307037	-21	latency_hist	09:47:13	7
982627	99	42	39,2	cyclictest	1434806	-21	kthreadcore	10:42:31	7
982627	99	42	39,2	cyclictest	1364981	-21	ntpq	10:07:42	7
982622	99	42	40,2	cyclictest	1557604	-21	kworker/u16:1+events_unbound	12:17:43	6
982618	99	42	40,2	cyclictest	1252478	-21	kworker/u16:4+flush-8:0	10:07:45	4
982618	99	41	39,2	cyclictest	1267367	-21	kworker/u16:1+flush-8:0	09:27:46	4
982618	99	41	39,2	cyclictest	1063889	-21	kworker/u16:2+events_unbound	08:42:43	4
982627	99	40	39,0	cyclictest	0	-21	swapper/7	10:22:31	7
982618	99	40	38,2	cyclictest	1289953	-21	kworker/u16:0+events_unbound	10:13:16	4
982627	99	39	38,0	cyclictest	0	-21	swapper/7	12:16:19	7
982627	99	39	37,1	cyclictest	1218394	-21	diskmemload	11:35:15	7
982627	99	39	33,5	cyclictest	1121879	-21	latency_hist	08:17:14	7
982618	99	39	37,2	cyclictest	1473514	-21	kworker/u16:0+events_unbound	11:16:08	4
982627	99	38	37,0	cyclictest	0	-21	swapper/7	11:01:03	7
982627	99	38	36,1	cyclictest	1218394	-21	diskmemload	11:20:18	7
982627	99	38	36,1	cyclictest	0	-21	swapper/7	10:04:24	7
982618	99	38	36,2	cyclictest	1252478	-21	kworker/u16:4+flush-8:0	09:37:41	4
982618	99	38	36,2	cyclictest	1252478	-21	kworker/u16:4+flush-8:0	09:37:41	4
982627	99	37	36,0	cyclictest	0	-21	swapper/7	10:54:03	7
982627	99	37	36,0	cyclictest	0	-21	swapper/7	10:41:03	7
982627	99	37	36,0	cyclictest	0	-21	swapper/7	09:07:29	7
982627	99	37	34,2	cyclictest	1579698	-21	ssh	11:43:47	7
982627	99	36	35,0	cyclictest	0	-21	swapper/7	12:06:39	7
982618	99	36	34,2	cyclictest	1517720	-21	kworker/u16:3+events_unbound	11:19:04	4
1425282	2	36	0,1	chrt	1425283	-21	kthreadcore	10:32:38	7
982627	99	35	35,0	cyclictest	0	-21	swapper/7	09:21:48	7
982627	99	35	34,0	cyclictest	0	-21	swapper/7	11:57:04	7
982627	99	35	34,0	cyclictest	0	-21	swapper/7	09:34:19	7
982627	99	35	33,1	cyclictest	1494563	-21	ssh	11:09:02	7
982618	99	35	33,2	cyclictest	1664694	-21	kworker/u16:0+events_unbound	12:18:28	4
982618	99	35	32,2	cyclictest	1416684	-21	kworker/u16:1+events_unbound	10:37:22	4
982627	99	34	33,1	cyclictest	0	-21	swapper/7	11:26:19	7
982627	99	34	33,0	cyclictest	0	-21	swapper/7	09:40:12	7
982627	99	34	33,0	cyclictest	0	-21	swapper/7	09:40:12	7
982627	99	34	33,0	cyclictest	0	-21	swapper/7	09:16:30	7
982618	99	34	32,2	cyclictest	1557604	-21	kworker/u16:1+flush-8:0	11:57:50	4
982618	99	34	32,2	cyclictest	1557604	-21	kworker/u16:1+flush-8:0	11:39:33	4
982618	99	34	32,2	cyclictest	1543555	-21	kworker/u16:3+events_unbound	11:35:40	4
982618	99	34	32,2	cyclictest	1460151	-21	kworker/u16:2+events_unbound	11:11:15	4
982618	99	34	32,2	cyclictest	1319359	-21	kworker/u16:2+events_unbound	10:06:37	4
982618	99	34	32,2	cyclictest	1252478	-21	kworker/u16:4+flush-8:0	09:22:42	4
982618	99	34	32,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	10:50:53	4
982618	99	34	32,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	10:01:30	4
982618	99	34	32,2	cyclictest	1131715	-21	kworker/u16:0+flush-8:0	08:37:29	4
982627	99	33	33,0	cyclictest	0	-21	swapper/7	12:33:27	7
982627	99	33	32,1	cyclictest	0	-21	swapper/7	11:49:11	7
982627	99	33	32,0	cyclictest	0	-21	swapper/7	10:50:55	7
982627	99	33	31,1	cyclictest	1389983	-21	/usr/sbin/munin	10:17:46	7
982627	99	33	31,1	cyclictest	1218394	-21	diskmemload	09:30:50	7
982618	99	33	31,2	cyclictest	1582020	-21	kworker/u16:3+events_unbound	12:23:04	4
982618	99	33	31,2	cyclictest	1303460	-21	kworker/u16:3+events_unbound	09:46:53	4
982618	99	33	31,2	cyclictest	1289953	-21	kworker/u16:0+events_unbound	10:27:22	4
982627	99	32	32,0	cyclictest	0	-21	swapper/7	09:56:26	7
982627	99	32	32,0	cyclictest	0	-21	swapper/7	09:22:55	7
982618	99	32	30,2	cyclictest	1557604	-21	kworker/u16:1+events_unbound	12:33:00	4
982618	99	32	30,2	cyclictest	1416684	-21	kworker/u16:1+flush-8:0	11:02:48	4
982618	99	32	30,2	cyclictest	1416684	-21	kworker/u16:1+flush-8:0	11:02:48	4
982618	99	32	30,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	09:56:28	4
982627	99	31	31,0	cyclictest	0	-21	swapper/7	12:21:07	7
982627	99	31	28,2	cyclictest	1641508	-21	ssh	12:10:22	7
982618	99	31	29,2	cyclictest	1582020	-21	kworker/u16:3+events_unbound	12:13:45	4
982618	99	31	29,2	cyclictest	1557604	-21	kworker/u16:1+events_unbound	12:28:36	4
982618	99	31	29,2	cyclictest	1529812	-21	kworker/u16:0+events_unbound	11:24:26	4
982618	99	31	29,2	cyclictest	1444526	-21	kworker/u16:3+events_unbound	10:55:01	4
982618	99	31	29,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	10:45:37	4
982618	99	31	29,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	09:20:34	4
982618	99	31	29,2	cyclictest	1169796	-21	kworker/u16:1+events_unbound	09:08:37	4
982618	99	31	29,2	cyclictest	1131715	-21	kworker/u16:0+events_unbound	09:14:05	4
982627	99	30	29,0	cyclictest	0	-21	swapper/7	07:26:24	7
982627	99	30	27,2	cyclictest	1371898	-21	ssh	10:12:34	7
982627	99	30	0,29	cyclictest	1343072	-21	ssh	10:01:09	7
982621	99	30	28,2	cyclictest	1083119	-21	kworker/u16:1+events_unbound	08:12:39	5
982618	99	30	28,2	cyclictest	963087	-21	kworker/u16:1+events_unbound	07:14:43	4
982618	99	30	28,2	cyclictest	1557604	-21	kworker/u16:1+events_unbound	11:45:34	4
982618	99	30	28,2	cyclictest	1460151	-21	kworker/u16:2+events_unbound	11:30:37	4
982618	99	30	28,2	cyclictest	1131715	-21	kworker/u16:0+flush-8:0	08:47:41	4
982618	99	30	28,2	cyclictest	1131715	-21	kworker/u16:0+events_unbound	08:34:56	4
982618	99	30	28,2	cyclictest	1083119	-21	kworker/u16:1+events_unbound	08:25:55	4
982622	99	29	27,2	cyclictest	1557604	-21	kworker/u16:1+events_unbound	11:48:05	6
982618	99	29	27,2	cyclictest	934933	-21	kworker/u16:3+events_unbound	07:12:08	4
982618	99	29	27,2	cyclictest	1582020	-21	kworker/u16:3+events_unbound	12:04:06	4
982618	99	29	27,2	cyclictest	1460151	-21	kworker/u16:2+events_unbound	11:00:41	4
982618	99	29	27,2	cyclictest	1416684	-21	kworker/u16:1+flush-8:0	10:34:58	4
982618	99	29	27,2	cyclictest	1389334	-21	kworker/u16:1+events_unbound	10:24:42	4
982618	99	29	27,2	cyclictest	1303460	-21	kworker/u16:3+flush-8:0	09:48:08	4
982618	99	29	27,2	cyclictest	1252478	-21	kworker/u16:4+events_unbound	10:20:06	4
982618	99	29	27,2	cyclictest	1063889	-21	kworker/u16:2+events_unbound	08:57:40	4
982618	99	29	27,2	cyclictest	1006054	-21	kworker/u16:0+events_unbound	07:18:00	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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