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 Wed May 13, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
769530	2	62	52,7	sleep4	0	-21	swapper/4	19:04:04	4
770105	99	55	50,4	cyclictest	1077204	-21	latency_hist	21:38:07	7
770099	99	50	48,2	cyclictest	1234503	-21	kworker/u16:0+events_unbound	00:08:39	5
769820	2	50	40,7	sleep5	0	-21	swapper/5	19:08:06	5
770100	99	45	43,2	cyclictest	1210346	-21	kworker/u16:2+flush-8:0	22:38:08	6
768979	2	41	6,29	sleep7	0	-21	swapper/7	19:03:43	7
770099	99	39	37,2	cyclictest	995094	-21	kworker/u16:1+events_unbound	21:30:39	5
770099	99	39	37,2	cyclictest	1210346	-21	kworker/u16:2+events_unbound	23:55:47	5
770099	99	38	36,2	cyclictest	1343314	-21	kworker/u16:1+flush-8:0	23:50:48	5
770099	99	38	36,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	22:52:03	5
770099	99	37	35,2	cyclictest	1343314	-21	kworker/u16:1+events_unbound	23:35:39	5
770099	99	37	35,2	cyclictest	1234503	-21	kworker/u16:0+events_unbound	00:06:03	5
770099	99	37	35,2	cyclictest	1113487	-21	kworker/u16:4+events_unbound	22:04:12	5
770099	99	36	34,2	cyclictest	975895	-21	kworker/u16:3+events_unbound	21:08:48	5
770099	99	36	34,2	cyclictest	760303	-21	kworker/u16:0+flush-8:0	20:13:34	5
770099	99	36	34,2	cyclictest	1210346	-21	kworker/u16:2+events_unbound	23:30:44	5
770099	99	36	34,2	cyclictest	1210346	-21	kworker/u16:2+events_unbound	22:55:04	5
770099	99	36	34,2	cyclictest	1161110	-21	kworker/u16:0+flush-8:0	22:23:47	5
770099	99	36	34,2	cyclictest	1135273	-21	kworker/u16:1+flush-8:0	22:39:27	5
770099	99	36	34,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	23:10:23	5
770099	99	36	34,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	23:10:23	5
770099	99	35	33,2	cyclictest	995094	-21	kworker/u16:1+events_unbound	21:25:36	5
770099	99	35	33,2	cyclictest	1343314	-21	kworker/u16:1+events_unbound	23:58:47	5
770099	99	35	33,2	cyclictest	1234503	-21	kworker/u16:0+flush-8:0	23:18:51	5
770099	99	35	33,2	cyclictest	1234503	-21	kworker/u16:0+events_unbound	23:24:23	5
770099	99	35	33,2	cyclictest	1234503	-21	kworker/u16:0+events_unbound	00:24:39	5
770099	99	35	33,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	22:35:16	5
770099	99	35	33,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	22:16:23	5
770099	99	35	33,2	cyclictest	1037760	-21	kworker/u16:3+events_unbound	21:50:27	5
770099	99	35	33,2	cyclictest	1037760	-21	kworker/u16:3+events_unbound	21:39:27	5
770105	99	34	32,1	cyclictest	1004721	-21	diskmemload	22:27:19	7
770105	99	34	29,4	cyclictest	1343273	-21	latency_hist	23:28:08	7
770099	99	34	32,2	cyclictest	1343314	-21	kworker/u16:1+events_unbound	23:42:20	5
770099	99	34	32,2	cyclictest	1234503	-21	kworker/u16:0+flush-8:0	23:47:59	5
770099	99	34	32,2	cyclictest	1210346	-21	kworker/u16:2+events_unbound	22:44:12	5
770099	99	34	32,2	cyclictest	1161110	-21	kworker/u16:0+flush-8:0	22:29:44	5
770099	99	34	32,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	23:00:35	5
770099	99	34	32,2	cyclictest	1135273	-21	kworker/u16:1+events_unbound	22:19:24	5
770099	99	34	32,2	cyclictest	1113487	-21	kworker/u16:4+events_unbound	22:09:03	5
770099	99	34	32,2	cyclictest	1113487	-21	kworker/u16:4+events_unbound	21:56:11	5
770099	99	34	32,2	cyclictest	1016793	-21	kworker/u16:0+events_unbound	21:34:00	5
770100	99	33	30,2	cyclictest	1210346	-21	kworker/u16:2+events_unbound	23:18:20	6
770099	99	33	31,2	cyclictest	995094	-21	kworker/u16:1+events_unbound	21:45:24	5
770099	99	33	31,2	cyclictest	1476414	-21	kworker/u16:3+events_unbound	00:32:59	5
770099	99	33	31,2	cyclictest	1234503	-21	kworker/u16:0+events_unbound	00:33:11	5
770099	99	33	31,2	cyclictest	1037760	-21	kworker/u16:3+events_unbound	21:20:55	5
770099	99	32	30,2	cyclictest	995094	-21	kworker/u16:1+flush-8:0	21:14:28	5
770099	99	32	30,2	cyclictest	1113487	-21	kworker/u16:4+flush-8:0	22:00:43	5
770099	99	32	29,2	cyclictest	1135273	-21	kworker/u16:1+flush-8:0	23:13:15	5
769713	2	32	22,7	sleep6	0	-21	swapper/6	19:06:38	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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