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 Sun Apr 12, 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
2224625	99	48	45,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	23:16:59	6
2224622	99	47	45,2	cyclictest	2438574	-21	kworker/u16:0+events_unbound	21:17:21	5
2224622	99	46	43,2	cyclictest	2720061	-21	kworker/u16:2+events_unbound	00:01:58	5
2224622	99	46	43,2	cyclictest	2400134	-21	kworker/u16:1+events_unbound	21:36:59	5
2224129	2	46	34,8	sleep4	0	-21	swapper/4	18:58:57	4
2224627	99	44	39,4	cyclictest	650	-21	systemd-journal	20:46:57	7
2224622	99	44	42,2	cyclictest	2493452	-21	kworker/u16:3+events_unbound	21:50:07	5
2224625	99	43	40,2	cyclictest	2889231	-21	kworker/u16:3+events_unbound	00:16:59	6
2224625	99	43	40,2	cyclictest	2889231	-21	kworker/u16:3+events_unbound	00:11:58	6
2224622	99	43	41,2	cyclictest	2816844	-21	kworker/u16:3+flush-8:0	23:31:57	5
2224622	99	43	40,2	cyclictest	2493452	-21	kworker/u16:3+events_unbound	21:28:47	5
2224622	99	42	40,2	cyclictest	2912657	-21	kworker/u16:4+events_unbound	00:25:35	5
2224622	99	42	40,2	cyclictest	2720061	-21	kworker/u16:2+events_unbound	00:09:59	5
2224622	99	42	40,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	23:20:50	5
2224622	99	42	40,2	cyclictest	2400134	-21	kworker/u16:1+events_unbound	21:35:18	5
2224123	2	42	1,36	sleep7	0	-21	swapper/7	18:58:52	7
2224622	99	41	39,2	cyclictest	2625349	-21	kworker/u16:2+events_unbound	22:25:02	5
2224622	99	41	39,2	cyclictest	2625349	-21	kworker/u16:2+events_unbound	22:17:27	5
2224622	99	41	39,2	cyclictest	2541773	-21	kworker/u16:2+events_unbound	21:53:15	5
2224622	99	41	38,2	cyclictest	2438574	-21	kworker/u16:0+events_unbound	21:06:58	5
2224625	99	40	38,2	cyclictest	2625349	-21	kworker/u16:2+events_unbound	22:26:08	6
2224625	99	40	37,2	cyclictest	2720061	-21	kworker/u16:2+events_unbound	23:41:58	6
2224622	99	40	38,2	cyclictest	2637360	-21	kworker/u16:4+events_unbound	22:40:58	5
2224622	99	40	38,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	22:06:08	5
2224622	99	39	37,2	cyclictest	2912657	-21	kworker/u16:4+events_unbound	00:27:50	5
2224622	99	39	37,2	cyclictest	2720061	-21	kworker/u16:2+events_unbound	23:37:30	5
2224622	99	39	37,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	23:51:54	5
2224622	99	39	37,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	22:33:07	5
2224625	99	38	36,2	cyclictest	2381418	-21	kworker/u16:4+flush-8:0	20:22:23	6
2224625	99	38	35,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	22:37:07	6
2224622	99	38	36,2	cyclictest	2637360	-21	kworker/u16:4+events_unbound	22:49:55	5
2224622	99	38	36,2	cyclictest	2637360	-21	kworker/u16:4+events_unbound	22:27:25	5
2224622	99	38	36,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	23:22:47	5
2224622	99	38	35,2	cyclictest	2670961	-21	kworker/u16:0+flush-8:0	23:57:07	5
2224622	99	38	35,2	cyclictest	2266393	-21	kworker/u16:2+events_unbound	19:41:59	5
2224627	99	37	34,2	cyclictest	902	-21	dbus-daemon	22:21:57	7
2224625	99	37	35,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	22:34:07	6
2224625	99	37	35,2	cyclictest	2438574	-21	kworker/u16:0+flush-8:0	21:52:30	6
2224622	99	37	36,1	cyclictest	2599928	-21	kworker/u16:1+events_unbound	22:07:07	5
2224622	99	37	35,2	cyclictest	2912657	-21	kworker/u16:4+events_unbound	00:12:06	5
2224622	99	37	35,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	22:59:02	5
2224622	99	37	35,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	22:53:38	5
2224622	99	37	35,2	cyclictest	2438574	-21	kworker/u16:0+events_unbound	21:16:07	5
2224622	99	37	34,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	22:42:02	5
2224625	99	36	34,2	cyclictest	2541773	-21	kworker/u16:2+events_unbound	21:41:56	6
2224625	99	36	34,2	cyclictest	2238443	-21	kworker/u16:0+events_unbound	19:12:11	6
2224622	99	36	34,2	cyclictest	2817269	-21	kworker/u16:4+events_unbound	23:44:07	5
2224622	99	36	34,2	cyclictest	2670961	-21	kworker/u16:0+events_unbound	23:04:31	5
2224622	99	36	34,2	cyclictest	2599928	-21	kworker/u16:1+events_unbound	23:30:30	5
2224168	2	36	26,7	sleep5	0	-21	swapper/5	18:59:30	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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