OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #1

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

Characteristics of the 100 highest latencies:

System rackbslot1.osadl.org (updated Thu Dec 18, 2025 12:44:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1400868	2	214	159,13	sleep2	0	-21	swapper/2	07:07:46	2
1400999	2	210	159,41	sleep1	0	-21	swapper/1	07:09:22	1
1400845	2	209	173,10	sleep0	0	-21	swapper/0	07:07:28	0
1400991	2	177	153,14	sleep3	0	-21	swapper/3	07:09:16	3
1401268	99	62	58,3	cyclictest	1479123	-21	kworker/u8:3+flush-179:0	09:50:15	0
1401275	99	61	50,10	cyclictest	1701282	-21	kworker/u8:1+events_unbound	12:10:14	1
1401268	99	61	58,2	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	08:40:10	0
1401282	99	59	55,3	cyclictest	1546639	-21	kworker/u8:2+flush-179:0	09:45:12	3
1401282	99	58	53,4	cyclictest	1618923	-21	kworker/u8:0+flush-179:0	11:00:34	3
1401282	99	57	52,4	cyclictest	1577567	-21	kworker/u8:1+flush-179:0	10:10:00	3
1401268	99	57	40,15	cyclictest	1516365	-21	/usr/share/muni	09:00:03	0
1401282	99	56	49,5	cyclictest	1443920	-21	/usr/share/muni	07:50:10	3
1401275	99	56	52,3	cyclictest	1479123	-21	kworker/u8:3+flush-179:0	09:05:30	1
1401268	99	56	52,3	cyclictest	1649973	-21	kworker/u8:2+events_unbound	11:15:17	0
1401278	99	55	36,18	cyclictest	1438702	-26	chrome	07:45:02	2
1401275	99	55	52,2	cyclictest	1432954	-21	kworker/u8:0+flush-179:0	07:40:16	1
1401275	99	55	49,4	cyclictest	1600234	-21	apt-get	10:20:14	1
1401268	99	55	51,3	cyclictest	1349322	-21	kworker/u8:1+flush-179:0	07:25:15	0
1401268	99	55	39,15	cyclictest	1685888	-21	kworker/u8:0+flush-179:0	11:45:18	0
1401278	99	54	50,3	cyclictest	1675624	-21	munin-update	11:35:35	2
1401275	99	54	51,2	cyclictest	1577567	-21	kworker/u8:1+events_unbound	11:10:27	1
1401275	99	54	50,3	cyclictest	1411964	-21	kworker/u8:3+events_unbound	07:35:09	1
1401275	99	53	50,2	cyclictest	1721904	-21	kworker/u8:1+events_unbound	12:35:32	1
1401275	99	53	50,2	cyclictest	1567562	-21	kworker/u8:0+events_unbound	09:50:10	1
1401275	99	53	50,2	cyclictest	1300200	-21	kworker/u8:2+events_unbound	08:37:52	1
1401275	99	53	49,3	cyclictest	1479126	-21	kworker/u8:5+events_unbound	09:25:10	1
1401282	99	52	47,3	cyclictest	1521597	-21	/usr/share/muni	09:05:16	3
1401278	99	52	46,4	cyclictest	1686153	-21	CacheThread_Blo	11:45:01	2
1401275	99	52	48,3	cyclictest	1400929	-21	kworker/u8:0+flush-179:0	07:15:27	1
1401268	99	52	49,2	cyclictest	1567657	-21	kworker/u8:4+flush-179:0	09:55:27	0
1401268	99	52	48,3	cyclictest	1654815	-21	kworker/u8:3+flush-179:0	11:30:13	0
1401278	99	51	29,21	cyclictest	1690790	-21	kworker/u8:2+flush-179:0	12:10:30	2
1401275	99	51	47,3	cyclictest	1577567	-21	kworker/u8:1+flush-179:0	10:15:28	1
1401275	99	51	45,2	cyclictest	1443436	-21	kworker/u8:3+flush-179:0	07:56:53	1
1401268	99	51	48,2	cyclictest	1479126	-21	kworker/u8:5+events_unbound	08:50:26	0
1401268	99	51	48,2	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	08:35:21	0
1401268	99	51	46,4	cyclictest	1469145	-21	kworker/u8:0+events_unbound	08:15:14	0
1401282	99	50	45,3	cyclictest	1593244	-21	kworker/u8:3+flush-179:0	10:14:45	3
1401275	99	50	47,2	cyclictest	1567657	-21	kworker/u8:4+flush-179:0	10:05:51	1
1401275	99	50	47,2	cyclictest	1567562	-21	kworker/u8:0+events_unbound	09:55:30	1
1401275	99	50	42,7	cyclictest	1577567	-21	kworker/u8:1+flush-179:0	10:50:22	1
1401268	99	50	47,2	cyclictest	1526153	-21	kworker/u8:0+flush-179:0	09:31:20	0
1401268	99	50	47,2	cyclictest	1526153	-21	kworker/u8:0+flush-179:0	09:31:20	0
1401282	99	49	44,4	cyclictest	3125725	-21	ThreadPoolForeg	08:25:15	3
1401275	99	49	46,2	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	07:20:36	1
1401268	99	49	46,2	cyclictest	1716797	-21	kworker/u8:3+events_unbound	12:13:53	0
1401268	99	49	46,2	cyclictest	1618923	-21	kworker/u8:0+flush-179:0	11:00:23	0
1401268	99	49	45,3	cyclictest	1479126	-21	kworker/u8:5+flush-179:0	09:10:15	0
1401282	99	48	44,3	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	08:40:21	3
1401282	99	48	43,3	cyclictest	1567562	-21	kworker/u8:0+flush-179:0	10:20:23	3
1401278	99	48	31,15	cyclictest	247516	-21	Chrome_ChildIOT	07:16:34	2
1401268	99	48	45,3	cyclictest	1665145	-21	kworker/u8:4+flush-179:0	11:35:18	0
1401268	99	48	45,2	cyclictest	1544707	-21	kworker/u8:1+flush-179:0	09:45:31	0
1401268	99	48	44,3	cyclictest	1577567	-21	kworker/u8:1+flush-179:0	10:55:31	0
1401268	99	48	44,3	cyclictest	1432954	-21	kworker/u8:0+flush-179:0	07:45:39	0
1401268	99	48	43,4	cyclictest	1479123	-21	kworker/u8:3+events_unbound	09:25:13	0
1401268	99	48	42,4	cyclictest	3125688	-21	Chrome_ChildIOT	08:00:21	0
1401282	99	47	43,3	cyclictest	1690790	-21	kworker/u8:2+flush-179:0	12:00:37	3
1401282	99	47	42,4	cyclictest	1400929	-21	kworker/u8:0+flush-179:0	07:15:00	3
1401275	99	47	44,2	cyclictest	1349322	-21	kworker/u8:1+events_unbound	07:14:21	1
1401275	99	47	42,2	cyclictest	1411964	-21	kworker/u8:3+flush-179:0	07:30:28	1
1401275	99	47	34,12	cyclictest	1119791	-1	kworker/1:1H+kblockd	08:29:13	1
1401275	99	47	31,15	cyclictest	1526267	-1	kworker/1:2H+kblockd	10:40:36	1
1401282	99	46	42,3	cyclictest	1526153	-21	kworker/u8:0+events_unbound	09:25:33	3
1401282	99	46	42,3	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	08:45:31	3
1401282	99	46	42,3	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	07:35:17	3
1401282	99	46	41,4	cyclictest	1437964	-31	munin-graph	07:41:05	3
1401282	99	46	40,4	cyclictest	1578348	-21	/usr/share/muni	10:00:21	3
1401282	99	46	39,5	cyclictest	3125724	-21	ThreadPoolForeg	08:00:10	3
1401275	99	46	43,2	cyclictest	1479126	-21	kworker/u8:5+flush-179:0	08:55:32	1
1401275	99	46	41,4	cyclictest	1701646	-21	/usr/share/muni	12:00:16	1
1401275	99	46	37,8	cyclictest	1479126	-21	kworker/u8:5+events_unbound	08:40:25	1
1401268	99	46	44,2	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	08:55:11	0
1401268	99	46	41,3	cyclictest	1567562	-21	kworker/u8:0+events_unbound	10:17:02	0
1401268	99	46	31,14	cyclictest	1623946	-21	kworker/u8:4+flush-179:0	10:54:59	0
1401282	99	45	43,1	cyclictest	1411964	-21	kworker/u8:3+flush-179:0	07:20:09	3
1401278	99	45	42,2	cyclictest	1300200	-21	kworker/u8:2+flush-179:0	07:55:06	2
1401278	99	45	32,2	cyclictest	1700463	-21	kworker/2:1+pm	12:35:56	2
1401278	99	45	31,2	cyclictest	1700463	-21	kworker/2:1+pm	12:29:21	2
1401275	99	45	43,2	cyclictest	1690790	-21	kworker/u8:2+events_unbound	11:57:09	1
1401275	99	45	42,2	cyclictest	1654815	-21	kworker/u8:3+events_unbound	11:23:50	1
1401275	99	45	42,2	cyclictest	1544707	-21	kworker/u8:1+events_unbound	09:36:40	1
1401275	99	45	42,2	cyclictest	1517988	-21	kworker/u8:1+events_unbound	09:14:28	1
1401268	99	45	42,2	cyclictest	1665145	-21	kworker/u8:4+flush-179:0	11:40:22	0
1401268	99	45	42,2	cyclictest	1400929	-21	kworker/u8:0+flush-179:0	07:10:28	0
1401268	99	45	41,3	cyclictest	1654815	-21	kworker/u8:3+flush-179:0	11:20:30	0
1401268	99	45	40,4	cyclictest	1413904	-21	apt-get	07:20:13	0
1401268	99	45	31,13	cyclictest	1613764	-21	kworker/u8:3+flush-179:0	10:34:28	0
1401268	99	45	31,13	cyclictest	1479126	-21	kworker/u8:5+events_unbound	08:34:56	0
1401282	99	44	40,3	cyclictest	1551654	-31	munin-graph	09:31:28	3
1401282	99	44	40,3	cyclictest	1551654	-31	munin-graph	09:31:28	3
1401278	99	44	39,3	cyclictest	1665145	-21	kworker/u8:4+flush-179:0	12:02:49	2
1401278	99	44	37,5	cyclictest	1479126	-21	kworker/u8:5+flush-179:0	09:20:00	2
1401275	99	44	41,2	cyclictest	1567657	-21	kworker/u8:4+events_unbound	10:10:10	1
1401268	99	44	41,2	cyclictest	1690790	-21	kworker/u8:2+events_unbound	12:30:09	0
1401268	99	44	41,2	cyclictest	1690790	-21	kworker/u8:2+events_unbound	12:30:09	0
1401268	99	44	41,2	cyclictest	1618923	-21	kworker/u8:0+flush-179:0	11:09:21	0
1401268	99	44	41,2	cyclictest	1526153	-21	kworker/u8:0+flush-179:0	09:20:24	0
1401268	99	44	41,2	cyclictest	1526153	-21	kworker/u8:0+events_unbound	09:35:22	0
1401268	99	44	39,3	cyclictest	1558658	-21	apt-get	09:40:13	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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