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 50 highest latencies:

System rack0slot2.osadl.org (updated Tue Mar 10, 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
1457557	99	52	50,2	cyclictest	1867266	-21	kworker/u16:0+events_unbound	22:49:33	5
1457566	99	51	46,4	cyclictest	955	-21	in:imjournal	00:24:07	7
1449329	2	46	2,37	sleep7	0	-21	swapper/7	18:59:27	7
1456996	2	45	35,7	sleep4	0	-21	swapper/4	19:00:12	4
1457561	99	43	41,2	cyclictest	1518727	-21	kworker/u16:3+events_unbound	19:34:34	6
1457557	99	43	40,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	22:59:11	5
1457561	99	41	39,2	cyclictest	1518727	-21	kworker/u16:3+events_unbound	21:12:15	6
1457553	99	41	39,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	22:58:38	4
1457553	99	41	38,2	cyclictest	2021607	-21	kworker/u16:0+flush-8:0	00:13:57	4
6265	89	40	0,33	rtkit-daemon	0	-21	swapper/5	18:59:50	5
1457561	99	40	38,2	cyclictest	1773870	-21	kworker/u16:0+events_unbound	21:44:05	6
1457557	99	40	38,2	cyclictest	1928524	-21	kworker/u16:1+flush-8:0	23:04:50	5
1457557	99	40	38,2	cyclictest	1928524	-21	kworker/u16:1+flush-8:0	23:04:50	5
1457561	99	39	37,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	23:52:50	6
1457561	99	39	37,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	23:18:38	6
1457561	99	39	37,2	cyclictest	1680903	-21	kworker/u16:2+flush-8:0	22:07:50	6
1457557	99	39	37,2	cyclictest	1964466	-21	kworker/u16:2+events_unbound	23:15:09	5
1457557	99	39	37,2	cyclictest	1691760	-21	kworker/u16:0+events_unbound	21:09:02	5
1457557	99	39	37,2	cyclictest	1680903	-21	kworker/u16:2+events_unbound	21:59:45	5
1457557	99	39	36,2	cyclictest	1928524	-21	kworker/u16:1+events_unbound	23:09:09	5
1457557	99	39	36,2	cyclictest	1928524	-21	kworker/u16:1+events_unbound	23:09:09	5
1457561	99	38	36,2	cyclictest	2021607	-21	kworker/u16:0+events_unbound	23:20:31	6
1457561	99	38	36,2	cyclictest	2021607	-21	kworker/u16:0+events_unbound	00:18:42	6
1457561	99	38	36,2	cyclictest	1867266	-21	kworker/u16:0+events_unbound	22:16:35	6
1457561	99	38	36,2	cyclictest	1793785	-21	kworker/u16:1+events_unbound	21:47:55	6
1457557	99	38	36,2	cyclictest	2059856	-21	kworker/u16:1+events_unbound	23:40:18	5
1457557	99	38	36,2	cyclictest	2021607	-21	kworker/u16:0+events_unbound	23:22:17	5
1457553	99	38	36,2	cyclictest	1680903	-21	kworker/u16:2+events_unbound	22:08:38	4
1457561	99	37	35,2	cyclictest	1905040	-21	kworker/u16:4+flush-8:0	23:54:09	6
1457561	99	37	35,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	23:48:34	6
1457561	99	37	35,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	22:55:50	6
1457561	99	37	35,2	cyclictest	1867266	-21	kworker/u16:0+events_unbound	22:30:35	6
1457561	99	37	35,2	cyclictest	1867266	-21	kworker/u16:0+events_unbound	22:20:26	6
1457557	99	37	35,2	cyclictest	2129062	-21	kworker/u16:3+events_unbound	00:11:30	5
1457557	99	37	35,2	cyclictest	2021607	-21	kworker/u16:0+events_unbound	23:48:30	5
1457557	99	37	35,2	cyclictest	2021607	-21	kworker/u16:0+events_unbound	00:30:53	5
1457557	99	37	35,2	cyclictest	1890462	-21	kworker/u16:1+events_unbound	22:26:19	5
1457557	99	37	35,2	cyclictest	1680903	-21	kworker/u16:2+events_unbound	22:15:46	5
1457557	99	37	35,2	cyclictest	1518727	-21	kworker/u16:3+flush-8:0	21:14:50	5
1457553	99	37	35,2	cyclictest	1964466	-21	kworker/u16:2+events_unbound	23:16:11	4
1457561	99	36	34,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	23:25:26	6
1457561	99	36	34,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	22:51:46	6
1457561	99	36	34,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	22:47:14	6
1457561	99	36	34,2	cyclictest	1843518	-21	kworker/u16:1+events_unbound	22:11:01	6
1457561	99	36	34,2	cyclictest	1691760	-21	kworker/u16:0+flush-8:0	21:26:42	6
1457557	99	36	34,2	cyclictest	2129062	-21	kworker/u16:3+events_unbound	00:08:55	5
1457557	99	36	34,2	cyclictest	1905040	-21	kworker/u16:4+events_unbound	23:33:02	5
1457557	99	36	34,2	cyclictest	1691760	-21	kworker/u16:0+events_unbound	21:21:50	5
1457557	99	36	34,2	cyclictest	1680903	-21	kworker/u16:2+events_unbound	21:47:10	5
1457557	99	36	34,2	cyclictest	1518727	-21	kworker/u16:3+events_unbound	21:26:35	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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