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 Sun Aug 23, 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
3189581	2	99	0,0	sleep6	0	-21	swapper/6	21:47:52	6
2845853	2	58	23,30	sleep7	0	-21	swapper/7	19:03:52	7
2845853	2	58	23,30	sleep7	0	-21	swapper/7	19:03:52	7
2845851	2	45	35,7	sleep5	0	-21	swapper/5	19:03:50	5
2845851	2	45	35,7	sleep5	0	-21	swapper/5	19:03:50	5
3407855	2	44	0,0	sleep7	3407856	-21	sh	23:20:18	7
2846399	99	41	39,2	cyclictest	2782481	-21	kworker/u16:3+flush-8:0	19:37:25	4
2846399	99	38	36,2	cyclictest	2908646	-21	kworker/u16:1+flush-8:0	20:07:24	4
2846414	99	37	32,4	cyclictest	3553278	-21	latency_hist	00:22:24	7
2846412	99	36	34,2	cyclictest	3469039	-21	kworker/u16:3+events_unbound	23:52:58	6
2846412	99	35	32,2	cyclictest	3287286	-21	kworker/u16:1+flush-8:0	22:32:25	6
2846407	99	35	31,3	cyclictest	2986313	-21	kworker/u16:0+flush-8:0	20:32:51	5
2846407	99	34	29,4	cyclictest	2888836	-21	kworker/u16:4+flush-8:0	19:27:25	5
2846399	99	34	31,2	cyclictest	3430754	-21	kworker/u16:1+events_unbound	00:07:38	4
2845788	2	34	23,7	sleep6	0	-21	swapper/6	19:03:02	6
2845788	2	34	23,7	sleep6	0	-21	swapper/6	19:03:02	6
2846412	99	31	29,2	cyclictest	3225493	-21	kworker/u16:3+events_unbound	22:13:30	6
2846412	99	31	29,2	cyclictest	3225493	-21	kworker/u16:3+events_unbound	22:13:30	6
2846407	99	31	28,2	cyclictest	3154591	-21	kworker/u16:1+events_unbound	22:22:39	5
2846412	99	30	28,2	cyclictest	3142430	-21	kworker/u16:0+events_unbound	21:37:05	6
2846412	99	30	28,2	cyclictest	3064889	-21	kworker/u16:3+events_unbound	21:21:45	6
2846412	99	30	24,6	cyclictest	2781859	-21	kworker/u16:2+flush-8:0	19:50:23	6
2846407	99	30	28,2	cyclictest	3006319	-21	kworker/u16:4+events_unbound	20:57:40	5
2836827	2	30	19,8	sleep4	0	-21	swapper/4	19:02:36	4
2836827	2	30	19,8	sleep4	0	-21	swapper/4	19:02:36	4
2860700	2	29	0,1	chrt	0	-21	swapper/5	19:12:38	5
2846412	99	29	27,2	cyclictest	3565739	-21	kworker/u16:0+events_unbound	00:36:16	6
2846412	99	29	27,2	cyclictest	3516020	-21	kworker/u16:0+events_unbound	00:06:16	6
2846412	99	29	27,2	cyclictest	3108472	-21	kworker/u16:2+flush-8:0	21:24:04	6
2846412	99	29	27,2	cyclictest	3108472	-21	kworker/u16:2+events_unbound	22:04:46	6
2846412	99	29	27,2	cyclictest	2782481	-21	kworker/u16:3+events_unbound	20:00:15	6
2846412	99	29	26,2	cyclictest	3274325	-21	kworker/u16:2+events_unbound	22:27:26	6
2846407	99	29	27,2	cyclictest	3430754	-21	kworker/u16:1+flush-8:0	23:47:50	5
2846414	99	28	23,4	cyclictest	3493081	-21	latency_hist	23:57:25	7
2846412	99	28	27,1	cyclictest	3274325	-21	kworker/u16:2+events_unbound	22:53:01	6
2846412	99	28	27,1	cyclictest	3274325	-21	kworker/u16:2+events_unbound	22:53:01	6
2846412	99	28	26,2	cyclictest	3287286	-21	kworker/u16:1+events_unbound	22:48:17	6
2846412	99	28	26,2	cyclictest	3287286	-21	kworker/u16:1+events_unbound	22:39:33	6
2846412	99	28	26,2	cyclictest	2986313	-21	kworker/u16:0+events_unbound	20:29:42	6
2846412	99	28	26,2	cyclictest	2957838	-21	kworker/u16:2+flush-8:0	20:02:59	6
2846412	99	28	26,2	cyclictest	2132081	-21	kworker/u16:1+flush-8:0	19:11:39	6
2846412	99	28	25,2	cyclictest	3166654	-21	kworker/u16:3+flush-8:0	21:42:25	6
2846407	99	28	25,2	cyclictest	2782481	-21	kworker/u16:3+events_unbound	20:12:38	5
2846414	99	27	26,0	cyclictest	0	-21	swapper/7	21:27:54	7
2846412	99	27	25,2	cyclictest	3469039	-21	kworker/u16:3+flush-8:0	00:24:48	6
2846412	99	27	25,2	cyclictest	3430754	-21	kworker/u16:1+events_unbound	23:29:49	6
2846412	99	27	25,2	cyclictest	3399490	-21	kworker/u16:2+events_unbound	23:38:29	6
2846412	99	27	25,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:34:03	6
2846412	99	27	25,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:34:03	6
2846412	99	27	25,2	cyclictest	3312814	-21	kworker/u16:4+events_unbound	23:13:36	6
2846412	99	27	25,2	cyclictest	3191476	-21	kworker/u16:0+events_unbound	21:56:01	6
2846412	99	27	25,2	cyclictest	3154591	-21	kworker/u16:1+events_unbound	22:07:40	6
2846412	99	27	25,2	cyclictest	3108472	-21	kworker/u16:2+events_unbound	21:31:50	6
2846412	99	27	24,2	cyclictest	3553107	-21	kworker/u16:2+events_unbound	00:27:28	6
2846412	99	27	24,2	cyclictest	2816833	-21	kworker/u16:0+flush-8:0	19:17:31	6
2846407	99	27	25,2	cyclictest	3576547	-21	kworker/u16:4+events_unbound	00:32:54	5
2846407	99	27	25,2	cyclictest	3006319	-21	kworker/u16:4+events_unbound	20:52:49	5
2846399	99	27	25,2	cyclictest	2908646	-21	kworker/u16:1+flush-8:0	20:07:45	4
2846412	99	26	24,2	cyclictest	3312814	-21	kworker/u16:4+events_unbound	23:08:17	6
2846412	99	26	24,2	cyclictest	3064889	-21	kworker/u16:3+events_unbound	21:05:47	6
2846412	99	26	24,2	cyclictest	2908646	-21	kworker/u16:1+events_unbound	19:53:11	6
2846412	99	26	24,2	cyclictest	2908646	-21	kworker/u16:1+events_unbound	19:45:04	6
2846407	99	26	24,2	cyclictest	3154591	-21	kworker/u16:1+flush-8:0	22:07:44	5
2846399	99	26	24,2	cyclictest	3312814	-21	kworker/u16:4+events_unbound	23:12:55	4
2846414	99	25	20,4	cyclictest	3240436	-21	latency_hist	22:12:24	7
2846412	99	25	23,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:44:17	6
2846412	99	25	23,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:04:11	6
2846412	99	25	23,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:01:13	6
2846412	99	25	23,2	cyclictest	3312814	-21	kworker/u16:4+events_unbound	23:20:40	6
2846412	99	25	23,2	cyclictest	3225493	-21	kworker/u16:3+events_unbound	22:19:41	6
2846412	99	25	23,2	cyclictest	3191476	-21	kworker/u16:0+events_unbound	22:44:09	6
2846412	99	25	23,2	cyclictest	3064889	-21	kworker/u16:3+events_unbound	21:08:21	6
2846412	99	25	23,2	cyclictest	2782481	-21	kworker/u16:3+events_unbound	19:38:00	6
2846412	99	25	23,2	cyclictest	2781859	-21	kworker/u16:2+events_unbound	19:17:15	6
2846399	99	25	23,2	cyclictest	2816833	-21	kworker/u16:0+flush-8:0	19:12:54	4
2846412	99	24	22,2	cyclictest	3469039	-21	kworker/u16:3+events_unbound	23:59:29	6
2846412	99	24	22,2	cyclictest	3399490	-21	kworker/u16:2+events_unbound	23:25:29	6
2846412	99	24	22,2	cyclictest	2986313	-21	kworker/u16:0+events_unbound	20:45:39	6
2846412	99	24	22,2	cyclictest	2782481	-21	kworker/u16:3+events_unbound	19:27:23	6
2846407	99	24	21,2	cyclictest	3469039	-21	kworker/u16:3+flush-8:0	23:52:30	5
2846399	99	24	22,2	cyclictest	3516020	-21	kworker/u16:0+events_unbound	00:17:46	4
2846412	99	23	21,2	cyclictest	3469039	-21	kworker/u16:3+events_unbound	23:48:44	6
2846412	99	23	21,2	cyclictest	2986313	-21	kworker/u16:0+events_unbound	21:14:29	6
2846412	99	23	21,2	cyclictest	2986313	-21	kworker/u16:0+events_unbound	20:35:18	6
2846412	99	23	21,2	cyclictest	2957838	-21	kworker/u16:2+events_unbound	20:19:59	6
2846412	99	23	21,2	cyclictest	2957838	-21	kworker/u16:2+events_unbound	20:19:59	6
2846399	99	23	21,2	cyclictest	3225493	-21	kworker/u16:3+events_unbound	22:33:38	4
2846414	99	22	19,2	cyclictest	3589432	-21	cat	00:37:24	7
2846414	99	22	0,20	cyclictest	3481040	-21	latency_hist	23:52:25	7
2846412	99	22	20,2	cyclictest	3516020	-21	kworker/u16:0+flush-8:0	00:21:49	6
2846412	99	22	20,2	cyclictest	3469039	-21	kworker/u16:3+events_unbound	00:10:57	6
2846412	99	22	20,2	cyclictest	3225493	-21	kworker/u16:3+flush-8:0	22:24:45	6
2846412	99	22	20,2	cyclictest	3191476	-21	kworker/u16:0+events_unbound	22:01:09	6
2846412	99	22	20,2	cyclictest	3108472	-21	kworker/u16:2+flush-8:0	21:41:03	6
2846412	99	22	20,2	cyclictest	3006319	-21	kworker/u16:4+events_unbound	20:54:27	6
2846412	99	22	20,2	cyclictest	3005996	-21	kworker/u16:1+events_unbound	20:51:27	6
2846412	99	22	20,2	cyclictest	2986313	-21	kworker/u16:0+flush-8:0	21:02:04	6
2846412	99	22	19,2	cyclictest	3469039	-21	kworker/u16:3+flush-8:0	00:12:26	6
2846407	99	22	20,2	cyclictest	3348774	-21	kworker/u16:0+events_unbound	23:37:48	5
2846399	99	22	19,2	cyclictest	3430754	-21	kworker/u16:1+flush-8:0	23:37:30	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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