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 100 highest latencies:

System rack0slot2.osadl.org (updated Tue Feb 24, 2026 00:43:40)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
716966	2	94	0,1	sleep7	716968	-21	sh	00:02:32	7
54721	99	64	61,2	cyclictest	431829	-21	kworker/u16:1+events_unbound	22:25:30	5
54339	2	62	50,8	sleep5	0	-21	swapper/5	19:03:57	5
54356	2	52	42,7	sleep4	0	-21	swapper/4	19:04:12	4
46306	2	49	3,36	sleep7	0	-21	swapper/7	19:00:22	7
54721	99	45	42,2	cyclictest	730344	-21	kworker/u16:4+flush-8:0	00:25:04	5
54726	99	44	42,2	cyclictest	309732	-21	kworker/u16:0+flush-8:0	21:25:04	6
54726	99	44	42,2	cyclictest	309732	-21	kworker/u16:0+flush-8:0	21:25:04	6
54719	99	43	41,2	cyclictest	248821	-21	kworker/u16:0+flush-8:0	20:45:04	4
54721	99	42	40,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:38:18	5
54721	99	42	40,2	cyclictest	3273460	-21	kworker/u16:0+flush-8:0	20:10:30	5
54719	99	41	39,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:12:22	4
54719	99	41	39,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:45:06	4
54719	99	41	39,2	cyclictest	259679	-21	kworker/u16:3+events_unbound	21:00:04	4
54721	99	40	38,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:27:02	5
54719	99	40	38,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:33:29	4
54282	2	40	30,7	sleep6	0	-21	swapper/6	19:03:09	6
54721	99	39	37,2	cyclictest	248821	-21	kworker/u16:0+events_unbound	20:50:04	5
54719	99	39	37,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:02:34	4
54719	99	39	37,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	22:37:53	4
54719	99	39	37,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	21:56:46	4
54719	99	39	37,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:14:02	4
54721	99	38	36,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:45:04	5
54721	99	38	36,2	cyclictest	381337	-21	kworker/u16:2+flush-8:0	22:20:41	5
54719	99	38	37,1	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:53:45	4
54719	99	38	36,2	cyclictest	695682	-21	kworker/u16:2+events_unbound	23:57:05	4
54719	99	38	36,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	22:52:50	4
54719	99	38	36,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	22:22:50	4
54719	99	38	36,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	21:41:30	4
54719	99	38	36,2	cyclictest	335982	-21	kworker/u16:1+events_unbound	21:36:54	4
54719	99	38	36,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	22:17:06	4
54719	99	38	36,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:33:54	4
54719	99	38	36,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:24:10	4
54719	99	38	36,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:24:10	4
54719	99	38	36,2	cyclictest	2665121	-21	kworker/u16:1+flush-8:0	19:05:33	4
54719	99	38	36,2	cyclictest	259679	-21	kworker/u16:3+events_unbound	21:27:06	4
54721	99	37	35,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	23:05:32	5
54721	99	37	35,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	22:37:23	5
54721	99	37	35,2	cyclictest	406610	-21	kworker/u16:5+events_unbound	21:55:03	5
54721	99	37	35,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:19:03	5
54719	99	37	35,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:37:50	4
54719	99	37	35,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:28:22	4
54719	99	37	35,2	cyclictest	527051	-21	kworker/u16:1+events_unbound	22:56:50	4
54719	99	37	35,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:42:38	4
54719	99	37	35,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:42:38	4
54719	99	37	35,2	cyclictest	381337	-21	kworker/u16:2+flush-8:0	22:10:45	4
54719	99	37	35,2	cyclictest	278645	-21	kworker/u16:1+events_unbound	21:06:15	4
54719	99	37	35,2	cyclictest	192088	-21	kworker/u16:2+events_unbound	21:17:18	4
54726	99	36	33,2	cyclictest	527051	-21	kworker/u16:1+events_unbound	23:10:21	6
54721	99	36	34,2	cyclictest	730344	-21	kworker/u16:4+events_unbound	00:17:25	5
54721	99	36	34,2	cyclictest	670679	-21	kworker/u16:4+events_unbound	23:53:34	5
54721	99	36	34,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:32:30	5
54721	99	36	34,2	cyclictest	335983	-21	kworker/u16:4+events_unbound	21:48:55	5
54719	99	36	34,2	cyclictest	584618	-21	kworker/u16:0+events_unbound	23:14:14	4
54719	99	36	34,2	cyclictest	527051	-21	kworker/u16:1+events_unbound	23:19:42	4
54719	99	36	34,2	cyclictest	527051	-21	kworker/u16:1+events_unbound	23:09:22	4
54719	99	36	34,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:34:31	4
54726	99	35	33,2	cyclictest	3273460	-21	kworker/u16:0+flush-8:0	19:09:59	6
54726	99	35	31,3	cyclictest	489348	-21	kworker/u16:3+flush-8:0	22:45:25	6
54721	99	35	33,2	cyclictest	779945	-21	kworker/u16:0+events_unbound	00:34:29	5
54721	99	35	33,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:26:26	5
54721	99	35	33,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:31:53	5
54721	99	35	33,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:49:38	5
54721	99	35	33,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	22:17:14	5
54721	99	35	33,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:13:11	5
54719	99	35	33,2	cyclictest	779945	-21	kworker/u16:0+events_unbound	00:34:50	4
54719	99	35	33,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:22:02	4
54719	99	35	33,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:23:46	4
54719	99	35	33,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	23:54:21	4
54719	99	35	33,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	22:26:38	4
54726	99	34	31,3	cyclictest	309732	-21	kworker/u16:0+flush-8:0	21:30:04	6
54721	99	34	32,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:04:29	5
54721	99	34	32,2	cyclictest	527051	-21	kworker/u16:1+events_unbound	23:19:50	5
54721	99	34	32,2	cyclictest	431829	-21	kworker/u16:1+events_unbound	22:11:30	5
54721	99	34	32,2	cyclictest	431829	-21	kworker/u16:1+events_unbound	22:06:46	5
54721	99	34	32,2	cyclictest	431829	-21	kworker/u16:1+events_unbound	22:06:46	5
54721	99	34	32,2	cyclictest	335982	-21	kworker/u16:1+events_unbound	21:39:34	5
54721	99	34	32,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:21:18	5
54721	99	34	32,2	cyclictest	309732	-21	kworker/u16:0+events_unbound	21:21:18	5
54719	99	34	32,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	00:27:33	4
54719	99	34	32,2	cyclictest	381337	-21	kworker/u16:2+flush-8:0	22:05:42	4
54719	99	34	32,2	cyclictest	381337	-21	kworker/u16:2+flush-8:0	22:05:42	4
54719	99	34	32,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	22:01:22	4
54719	99	34	32,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	22:01:22	4
54719	99	34	32,2	cyclictest	335983	-21	kworker/u16:4+events_unbound	21:46:50	4
54726	99	33	31,2	cyclictest	489348	-21	kworker/u16:3+flush-8:0	23:54:59	6
54726	99	33	31,2	cyclictest	335982	-21	kworker/u16:1+flush-8:0	21:39:59	6
54721	99	33	31,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:24:49	5
54721	99	33	31,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	23:46:13	5
54721	99	33	31,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	23:03:38	5
54721	99	33	31,2	cyclictest	489348	-21	kworker/u16:3+events_unbound	22:53:54	5
54721	99	33	31,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	22:03:21	5
54721	99	33	31,2	cyclictest	381337	-21	kworker/u16:2+events_unbound	22:03:21	5
54721	99	33	31,2	cyclictest	335982	-21	kworker/u16:1+events_unbound	21:34:18	5
54721	99	33	31,2	cyclictest	259679	-21	kworker/u16:3+events_unbound	21:28:01	5
54719	99	33	31,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:16:46	4
54719	99	33	31,2	cyclictest	694410	-21	kworker/u16:1+events_unbound	00:08:29	4
54719	99	33	31,2	cyclictest	616376	-21	kworker/u16:2+events_unbound	23:42:22	4
54719	99	33	31,2	cyclictest	500817	-21	kworker/u16:6+events_unbound	22:48:26	4
54726	99	32	30,2	cyclictest	616376	-21	kworker/u16:2+flush-8:0	23:34:59	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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