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 Mon May 18, 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
3715045	2	92	0,1	sleep4	0	-21	swapper/4	23:18:10	4
3162034	99	59	57,2	cyclictest	3550885	-21	kworker/u16:1+events_unbound	23:28:01	5
3162035	99	58	55,2	cyclictest	3405536	-21	kworker/u16:2+events_unbound	21:38:03	6
3161449	2	51	41,7	sleep5	0	-21	swapper/5	19:03:37	5
3718149	2	49	0,0	sleep7	3718153	-21	kthreadcore	23:18:13	7
3162035	99	49	47,2	cyclictest	3806965	-21	kworker/u16:3+events_unbound	00:28:16	6
3162035	99	49	47,2	cyclictest	3550885	-21	kworker/u16:1+flush-8:0	23:03:04	6
3162034	99	45	43,2	cyclictest	3176121	-21	kworker/u16:3+flush-8:0	19:48:06	5
3162035	99	44	42,2	cyclictest	3550885	-21	kworker/u16:1+events_unbound	22:23:21	6
3162040	99	43	42,0	cyclictest	0	-21	swapper/7	00:28:20	7
3162035	99	42	40,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	23:18:08	6
3162035	99	41	39,2	cyclictest	3647455	-21	kworker/u16:4+events_unbound	23:23:37	6
3162035	99	41	39,2	cyclictest	3550885	-21	kworker/u16:1+events_unbound	23:53:01	6
3162035	99	41	39,2	cyclictest	3537843	-21	kworker/u16:0+flush-8:0	22:03:20	6
3162035	99	40	38,2	cyclictest	3553072	-21	kworker/u16:3+events_unbound	22:32:46	6
3162034	99	40	38,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	23:43:17	5
3162034	99	40	38,2	cyclictest	3590636	-21	kworker/u16:0+events_unbound	22:48:05	5
3161491	2	40	6,29	sleep7	0	-21	swapper/7	19:04:11	7
3580145	2	39	0,0	sleep7	3580143	-21	cut	22:23:07	7
3162035	99	39	37,2	cyclictest	3176121	-21	kworker/u16:3+flush-8:0	19:48:15	6
3162034	99	39	37,2	cyclictest	3638071	-21	kworker/u16:2+flush-8:0	22:58:18	5
3162034	99	39	37,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	00:37:29	5
3162035	99	38	36,2	cyclictest	3456545	-21	kworker/u16:4+flush-8:0	21:58:09	6
3162035	99	38	35,2	cyclictest	3550885	-21	kworker/u16:1+flush-8:0	23:08:11	6
3162035	99	37	35,2	cyclictest	3806965	-21	kworker/u16:3+events_unbound	00:11:53	6
3162035	99	37	35,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	23:59:09	6
3162035	99	37	35,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	23:51:35	6
3162035	99	37	35,2	cyclictest	3553072	-21	kworker/u16:3+events_unbound	22:17:39	6
3162034	99	37	35,2	cyclictest	3806854	-21	kworker/u16:0+flush-8:0	00:02:50	5
3162034	99	37	35,2	cyclictest	3638071	-21	kworker/u16:2+events_unbound	23:48:22	5
3162040	99	36	30,5	cyclictest	3252069	-21	latency_hist	19:52:49	7
3162035	99	36	34,2	cyclictest	3867373	-21	kworker/u16:0+events_unbound	00:36:17	6
3162035	99	36	34,2	cyclictest	3647455	-21	kworker/u16:4+events_unbound	23:38:16	6
3162035	99	36	34,2	cyclictest	3647455	-21	kworker/u16:4+events_unbound	23:15:30	6
3162035	99	36	34,2	cyclictest	3638071	-21	kworker/u16:2+flush-8:0	00:19:41	6
3162035	99	36	34,2	cyclictest	3386627	-21	kworker/u16:3+events_unbound	21:35:05	6
3162034	99	36	34,2	cyclictest	3550885	-21	kworker/u16:1+events_unbound	23:53:19	5
3162031	99	36	32,3	cyclictest	3176121	-21	kworker/u16:3+flush-8:0	19:38:14	4
3162035	99	35	33,2	cyclictest	3806965	-21	kworker/u16:3+events_unbound	00:23:25	6
3162035	99	35	33,2	cyclictest	3806965	-21	kworker/u16:3+events_unbound	00:23:25	6
3162035	99	35	33,2	cyclictest	3647455	-21	kworker/u16:4+flush-8:0	22:55:54	6
3162035	99	35	33,2	cyclictest	3647455	-21	kworker/u16:4+events_unbound	23:47:14	6
3162035	99	35	33,2	cyclictest	3590636	-21	kworker/u16:0+events_unbound	22:44:53	6
3162035	99	35	33,2	cyclictest	3550885	-21	kworker/u16:1+events_unbound	23:29:13	6
3162035	99	35	33,2	cyclictest	3537843	-21	kworker/u16:0+events_unbound	22:22:34	6
3162035	99	35	33,2	cyclictest	3405536	-21	kworker/u16:2+events_unbound	22:09:37	6
3162035	99	35	33,2	cyclictest	3386627	-21	kworker/u16:3+events_unbound	21:30:26	6
3162034	99	35	33,2	cyclictest	3806854	-21	kworker/u16:0+flush-8:0	23:58:03	5
3162034	99	35	33,2	cyclictest	3386627	-21	kworker/u16:3+flush-8:0	21:11:58	5
3162035	99	34	32,2	cyclictest	3638071	-21	kworker/u16:2+flush-8:0	22:58:19	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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