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 Fri Jul 17, 2026 00:43:30)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1819435	2	97	0,1	sleep4	0	-21	swapper/4	21:20:00	4
1556973	2	46	11,30	sleep7	0	-21	swapper/7	19:07:11	7
1557444	99	44	42,2	cyclictest	1904681	-21	kworker/u16:2+flush-8:0	22:40:02	6
1557444	99	41	39,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	00:15:02	6
1557439	99	41	38,2	cyclictest	1930016	-21	kworker/u16:0+flush-8:0	22:55:03	4
6324	89	40	0,33	rtkit-daemon	0	-21	swapper/5	19:04:53	5
1557439	99	40	37,2	cyclictest	1990629	-21	kworker/u16:4+flush-8:0	22:50:18	4
1557444	99	39	37,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	23:35:06	6
1557444	99	39	37,2	cyclictest	1765460	-21	kworker/u16:0+flush-8:0	21:00:18	6
1557011	2	39	29,7	sleep6	0	-21	swapper/6	19:07:42	6
1557444	99	38	35,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	23:55:02	6
1557444	99	38	35,2	cyclictest	1672805	-21	kworker/u16:2+events_unbound	21:09:50	6
1557439	99	38	36,2	cyclictest	1941353	-21	kworker/u16:3+flush-8:0	22:25:03	4
1557439	99	38	36,2	cyclictest	1941353	-21	kworker/u16:3+events_unbound	22:19:38	4
1557439	99	38	36,2	cyclictest	1765460	-21	kworker/u16:0+events_unbound	21:42:42	4
1557439	99	38	36,2	cyclictest	1711348	-21	kworker/u16:4+flush-8:0	21:35:03	4
1557444	99	37	34,2	cyclictest	1711348	-21	kworker/u16:4+events_unbound	21:25:18	6
1557439	99	37	35,2	cyclictest	1941353	-21	kworker/u16:3+flush-8:0	22:42:59	4
1557439	99	37	34,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	23:49:55	4
1557444	99	36	34,2	cyclictest	1990628	-21	kworker/u16:1+events_unbound	00:11:19	6
1557444	99	36	34,2	cyclictest	1930016	-21	kworker/u16:0+events_unbound	23:05:06	6
1557444	99	36	34,2	cyclictest	1672805	-21	kworker/u16:2+flush-8:0	20:15:03	6
1557439	99	36	34,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	00:05:24	4
1557439	99	36	34,2	cyclictest	1990628	-21	kworker/u16:1+events_unbound	23:42:39	4
1557444	99	35	34,1	cyclictest	2124915	-21	kworker/u16:4+events_unbound	00:27:29	6
1557444	99	35	33,2	cyclictest	2149735	-21	kworker/u16:0+events_unbound	00:07:38	6
1557444	99	35	33,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	23:59:55	6
1557444	99	35	33,2	cyclictest	1990628	-21	kworker/u16:1+events_unbound	22:47:58	6
1557444	99	35	33,2	cyclictest	1941353	-21	kworker/u16:3+flush-8:0	22:38:22	6
1557444	99	35	32,2	cyclictest	1528570	-21	kworker/u16:3+events_unbound	20:20:06	6
1557439	99	35	33,2	cyclictest	1990628	-21	kworker/u16:1+events_unbound	00:17:34	4
1557439	99	35	33,2	cyclictest	1990628	-21	kworker/u16:1+events_unbound	00:09:55	4
1557448	99	34	32,1	cyclictest	0	-21	swapper/7	19:35:18	7
1557444	99	34	32,2	cyclictest	1765460	-21	kworker/u16:0+flush-8:0	21:44:30	6
1557444	99	34	32,2	cyclictest	1711348	-21	kworker/u16:4+flush-8:0	20:25:11	6
1557444	99	34	32,2	cyclictest	1711348	-21	kworker/u16:4+flush-8:0	20:25:11	6
1557444	99	34	31,2	cyclictest	1876868	-21	kworker/u16:1+flush-8:0	22:00:02	6
1557439	99	34	32,2	cyclictest	2272049	-21	kworker/u16:6+events_unbound	00:31:02	4
1557439	99	34	32,2	cyclictest	2272049	-21	kworker/u16:6+events_unbound	00:31:02	4
1557439	99	34	32,2	cyclictest	2235184	-21	kworker/u16:3+events_unbound	00:28:19	4
1557439	99	34	32,2	cyclictest	2137477	-21	kworker/u16:2+events_unbound	23:33:21	4
1557439	99	34	32,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	00:36:38	4
1557439	99	34	32,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	00:36:38	4
1557439	99	34	32,2	cyclictest	1930016	-21	kworker/u16:0+events_unbound	23:13:03	4
1557439	99	34	32,2	cyclictest	1793280	-21	kworker/u16:1+events_unbound	21:18:18	4
1557439	99	34	32,2	cyclictest	1711348	-21	kworker/u16:4+events_unbound	21:58:51	4
1557439	99	34	32,2	cyclictest	1711348	-21	kworker/u16:4+events_unbound	21:27:02	4
1557444	99	33	31,2	cyclictest	2124915	-21	kworker/u16:4+events_unbound	23:50:25	6
1557444	99	33	31,2	cyclictest	1930016	-21	kworker/u16:0+flush-8:0	22:10:10	6
1557439	99	33	31,2	cyclictest	2124915	-21	kworker/u16:4+flush-8:0	23:25:03	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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