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 Apr 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
236064	2	94	0,1	sleep6	0	-21	swapper/6	23:44:45	6
3801373	2	58	47,7	sleep6	0	-21	swapper/6	18:59:34	6
3801324	2	52	41,8	sleep4	0	-21	swapper/4	18:58:51	4
3801430	2	50	40,7	sleep5	0	-21	swapper/5	19:00:21	5
3801830	99	44	43,0	cyclictest	0	-21	swapper/7	22:16:40	7
3801830	99	42	37,4	cyclictest	81054	-21	latency_hist	22:42:04	7
3801830	99	41	0,39	cyclictest	3996384	-21	latency_hist	20:42:05	7
3801825	99	41	39,2	cyclictest	4015651	-21	kworker/u16:4+events_unbound	21:12:38	5
3801825	99	41	39,2	cyclictest	248319	-21	kworker/u16:0+events_unbound	23:56:15	5
3801825	99	40	38,2	cyclictest	4140548	-21	kworker/u16:0+events_unbound	22:01:32	5
3801825	99	40	38,2	cyclictest	4094979	-21	kworker/u16:4+events_unbound	21:30:39	5
3801825	99	40	38,2	cyclictest	4094979	-21	kworker/u16:4+events_unbound	21:30:39	5
3801825	99	40	38,2	cyclictest	4015651	-21	kworker/u16:4+events_unbound	21:10:21	5
3801825	99	40	38,2	cyclictest	295958	-21	kworker/u16:2+events_unbound	00:15:24	5
3801825	99	40	38,2	cyclictest	248319	-21	kworker/u16:0+events_unbound	00:05:55	5
3801825	99	39	37,2	cyclictest	94845	-21	kworker/u16:4+events_unbound	22:55:51	5
3801825	99	39	37,2	cyclictest	79533	-21	kworker/u16:1+flush-8:0	00:07:38	5
3801825	99	39	37,2	cyclictest	79533	-21	kworker/u16:1+flush-8:0	00:07:38	5
3801825	99	39	37,2	cyclictest	4153579	-21	kworker/u16:1+events_unbound	21:51:51	5
3801825	99	39	37,2	cyclictest	4091626	-21	kworker/u16:0+events_unbound	21:25:36	5
3801825	99	39	37,2	cyclictest	33096	-21	kworker/u16:5+events_unbound	22:28:40	5
3801825	99	39	37,2	cyclictest	307742	-21	kworker/u16:4+events_unbound	00:29:24	5
3801825	99	39	37,2	cyclictest	201746	-21	kworker/u16:5+events_unbound	23:42:08	5
3801825	99	39	37,2	cyclictest	127676	-21	kworker/u16:0+events_unbound	23:04:23	5
3801825	99	39	37,2	cyclictest	115088	-21	kworker/u16:2+events_unbound	23:11:12	5
3792840	2	39	3,30	sleep7	0	-21	swapper/7	18:57:18	7
3801825	99	38	36,2	cyclictest	79533	-21	kworker/u16:1+events_unbound	23:49:36	5
3801825	99	38	36,2	cyclictest	4078897	-21	kworker/u16:3+events_unbound	21:53:00	5
3801825	99	38	36,2	cyclictest	4015651	-21	kworker/u16:4+flush-8:0	21:02:31	5
3801825	99	38	36,2	cyclictest	295958	-21	kworker/u16:2+events_unbound	00:18:22	5
3801825	99	38	36,2	cyclictest	115088	-21	kworker/u16:2+events_unbound	23:26:52	5
3801830	99	37	36,0	cyclictest	0	-21	swapper/7	23:31:10	7
3801830	99	37	36,0	cyclictest	0	-21	swapper/7	23:31:10	7
3801830	99	37	36,0	cyclictest	0	-21	swapper/7	21:17:59	7
3801830	99	37	35,1	cyclictest	4034678	-21	diskmemload	22:25:30	7
3801830	99	37	33,3	cyclictest	343649	-21	sh	00:29:10	7
3801825	99	37	35,2	cyclictest	4140548	-21	kworker/u16:0+events_unbound	22:25:07	5
3801825	99	37	35,2	cyclictest	4078897	-21	kworker/u16:3+events_unbound	22:03:27	5
3801825	99	37	35,2	cyclictest	201696	-21	kworker/u16:4+events_unbound	23:36:36	5
3801825	99	37	35,2	cyclictest	115088	-21	kworker/u16:2+events_unbound	23:16:48	5
3801825	99	37	34,2	cyclictest	3792087	-21	kworker/u16:1+events_unbound	19:27:08	5
3801830	99	36	35,0	cyclictest	0	-21	swapper/7	21:56:44	7
3801825	99	36	34,2	cyclictest	4167034	-21	kworker/u16:2+events_unbound	22:16:07	5
3801825	99	36	34,2	cyclictest	4140548	-21	kworker/u16:0+events_unbound	22:41:24	5
3801825	99	36	34,2	cyclictest	271034	-21	kworker/u16:3+events_unbound	00:26:48	5
3801825	99	36	34,2	cyclictest	19114	-21	kworker/u16:3+events_unbound	22:20:15	5
3801825	99	36	34,2	cyclictest	189759	-21	kworker/u16:3+events_unbound	23:30:35	5
3801825	99	36	34,2	cyclictest	189759	-21	kworker/u16:3+events_unbound	23:30:35	5
3801825	99	36	33,2	cyclictest	3928545	-21	kworker/u16:2+events_unbound	21:17:51	5
3801825	99	35	33,2	cyclictest	271076	-21	kworker/u16:4+events_unbound	23:59:36	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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