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 Thu Jun 04, 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
552096	2	96	0,0	sleep6	0	-21	swapper/6	00:21:59	6
4152065	2	57	47,7	sleep4	0	-21	swapper/4	19:04:24	4
4152527	99	55	53,2	cyclictest	99096	-21	kworker/u16:2+flush-8:0	21:36:55	5
4152527	99	54	52,2	cyclictest	523175	-21	kworker/u16:0+events_unbound	00:31:55	5
4152527	99	50	48,2	cyclictest	172224	-21	kworker/u16:0+events_unbound	21:51:55	5
4152527	99	49	47,2	cyclictest	496024	-21	kworker/u16:0+events_unbound	23:57:04	5
4152527	99	48	46,2	cyclictest	439778	-21	kworker/u16:1+events_unbound	00:22:12	5
4152535	99	46	43,2	cyclictest	65534	-21	latency_hist	20:41:40	7
4152527	99	46	44,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:21:53	5
4151979	2	46	35,8	sleep5	0	-21	swapper/5	19:03:13	5
4152527	99	45	43,2	cyclictest	44841	-21	kworker/u16:3+events_unbound	21:47:08	5
4152527	99	45	43,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:21:55	5
4152527	99	45	41,3	cyclictest	44841	-21	kworker/u16:3+flush-8:0	20:47:06	5
4152527	99	45	41,3	cyclictest	44841	-21	kworker/u16:3+flush-8:0	20:47:06	5
4152527	99	44	42,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	20:27:05	5
4152535	99	43	38,4	cyclictest	114192	-21	latency_hist	21:21:40	7
4152527	99	43	41,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:43:37	5
4152527	99	43	41,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:27:53	5
4152535	99	42	37,4	cyclictest	138336	-21	latency_hist	21:31:40	7
4152527	99	42	40,2	cyclictest	4177208	-21	kworker/u16:1+flush-8:0	19:47:05	5
4151257	2	42	3,32	sleep7	0	-21	swapper/7	19:02:10	7
4152527	99	41	39,2	cyclictest	413248	-21	kworker/u16:3+events_unbound	23:36:21	5
4152527	99	41	39,2	cyclictest	283177	-21	kworker/u16:2+events_unbound	23:37:06	5
4152527	99	40	38,2	cyclictest	477352	-21	kworker/u16:4+flush-8:0	00:27:09	5
4152527	99	40	38,2	cyclictest	44841	-21	kworker/u16:3+flush-8:0	21:13:22	5
4152527	99	40	37,2	cyclictest	44841	-21	kworker/u16:3+events_unbound	21:16:45	5
4152527	99	39	37,2	cyclictest	44841	-21	kworker/u16:3+events_unbound	20:36:58	5
4152527	99	39	37,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	20:01:42	5
4152527	99	39	37,2	cyclictest	283177	-21	kworker/u16:2+events_unbound	23:43:21	5
4152527	99	39	37,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:18:10	5
4152527	99	39	37,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:11:02	5
4152527	99	38	36,2	cyclictest	439778	-21	kworker/u16:1+events_unbound	00:03:54	5
4152527	99	38	36,2	cyclictest	283177	-21	kworker/u16:2+events_unbound	23:54:41	5
4152527	99	38	36,2	cyclictest	283177	-21	kworker/u16:2+events_unbound	23:00:45	5
4152527	99	38	36,2	cyclictest	222794	-21	kworker/u16:4+flush-8:0	22:20:06	5
4152527	99	38	36,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:35:01	5
4152527	99	38	36,2	cyclictest	184670	-21	kworker/u16:1+events_unbound	22:06:54	5
4152527	99	38	36,2	cyclictest	172224	-21	kworker/u16:0+events_unbound	21:42:46	5
4152527	99	37	35,2	cyclictest	88017	-21	kworker/u16:1+flush-8:0	21:07:14	5
4152527	99	37	35,2	cyclictest	66369	-21	kworker/u16:4+flush-8:0	21:27:13	5
4152527	99	37	35,2	cyclictest	4177208	-21	kworker/u16:1+flush-8:0	20:17:01	5
4152527	99	37	35,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:29:42	5
4152527	99	37	35,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:16:17	5
4152527	99	37	35,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:50:17	5
4152535	99	36	0,34	cyclictest	635	-21	systemd-journal	23:26:39	7
4152527	99	36	34,2	cyclictest	99096	-21	kworker/u16:2+flush-8:0	21:23:57	5
4152527	99	36	34,2	cyclictest	66369	-21	kworker/u16:4+events_unbound	21:32:54	5
4152527	99	36	34,2	cyclictest	523175	-21	kworker/u16:0+flush-8:0	00:21:06	5
4152527	99	36	34,2	cyclictest	331323	-21	kworker/u16:1+flush-8:0	23:05:30	5
4152527	99	36	34,2	cyclictest	331323	-21	kworker/u16:1+events_unbound	22:56:09	5
4152527	99	36	34,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:40:58	5
4152535	99	35	30,4	cyclictest	210633	-21	latency_hist	22:01:40	7
4152527	99	35	33,2	cyclictest	44841	-21	kworker/u16:3+flush-8:0	22:04:29	5
4152527	99	35	33,2	cyclictest	222794	-21	kworker/u16:4+flush-8:0	22:47:45	5
4152527	99	34	32,2	cyclictest	212365	-21	kworker/u16:0+flush-8:0	23:12:41	5
4152527	99	34	32,2	cyclictest	184670	-21	kworker/u16:1+flush-8:0	21:59:58	5
4152527	99	33	31,2	cyclictest	439778	-21	kworker/u16:1+events_unbound	00:11:10	5
4152527	99	33	31,2	cyclictest	439778	-21	kworker/u16:1+events_unbound	00:11:10	5
4152527	99	33	31,2	cyclictest	4103348	-21	kworker/u16:0+events_unbound	19:16:53	5
4152527	99	33	30,2	cyclictest	4162004	-21	kworker/u16:3+events_unbound	19:22:49	5
4152527	99	32	30,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	19:37:00	5
4152527	99	32	30,2	cyclictest	24502	-21	kworker/u16:0+events_unbound	20:07:02	5
4152523	99	32	28,3	cyclictest	172224	-21	kworker/u16:0+flush-8:0	21:46:40	4
4152535	99	31	26,4	cyclictest	85782	-21	cat	20:57:06	7
4152527	99	31	29,2	cyclictest	477352	-21	kworker/u16:4+flush-8:0	00:12:37	5
4152009	2	31	21,7	sleep6	0	-21	swapper/6	19:03:38	6
4152527	99	30	28,2	cyclictest	44841	-21	kworker/u16:3+flush-8:0	20:57:01	5
4152535	99	29	24,4	cyclictest	270964	-21	latency_hist	22:26:40	7
4152527	99	29	27,2	cyclictest	3887171	-21	kworker/u16:2+events_unbound	19:09:51	5
4152527	99	28	26,2	cyclictest	44841	-21	kworker/u16:3+events_unbound	20:53:06	5
4152527	99	28	26,2	cyclictest	4186814	-21	kworker/u16:0+events_unbound	19:43:51	5
4152527	99	28	26,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	20:44:22	5
4152527	99	28	26,2	cyclictest	3887171	-21	kworker/u16:2+events_unbound	20:22:50	5
4152527	99	28	25,2	cyclictest	3887171	-21	kworker/u16:2+events_unbound	20:13:06	5
569977	2	27	0,1	chrt	0	-21	swapper/6	00:27:12	6
4152535	99	27	0,25	cyclictest	418697	-21	grep	23:26:58	7
4152527	99	27	24,2	cyclictest	4103348	-21	kworker/u16:0+events_unbound	19:12:58	5
4152532	99	26	23,3	cyclictest	99096	-21	kworker/u16:2+flush-8:0	21:41:40	6
4152527	99	26	24,2	cyclictest	66369	-21	kworker/u16:4+events_unbound	21:02:50	5
4152535	99	25	20,4	cyclictest	76652	-21	latency_hist	20:56:40	7
4152527	99	25	23,2	cyclictest	3887171	-21	kworker/u16:2+events_unbound	19:26:49	5
280006	2	25	0,1	chrt	280004	-21	ntpq	22:27:07	7
4152527	99	24	22,2	cyclictest	4177208	-21	kworker/u16:1+events_unbound	20:33:18	5
4152535	99	23	18,4	cyclictest	463919	-21	latency_hist	23:46:40	7
4152535	99	23	18,4	cyclictest	4161952	-21	latency_hist	19:11:40	7
4152535	99	22	0,20	cyclictest	364592	-21	sensors	23:02:09	7
4152532	99	22	19,2	cyclictest	222794	-21	kworker/u16:4+flush-8:0	22:46:39	6
4152523	99	22	20,2	cyclictest	523175	-21	kworker/u16:0+events_unbound	00:36:22	4
4152523	99	22	20,2	cyclictest	222794	-21	kworker/u16:4+events_unbound	22:38:47	4
4152532	99	21	18,2	cyclictest	222794	-21	kworker/u16:4+flush-8:0	22:21:51	6
4152527	99	21	19,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	19:57:25	5
4152523	99	21	19,2	cyclictest	66369	-21	kworker/u16:4+events_unbound	21:09:46	4
4152523	99	21	19,2	cyclictest	477352	-21	kworker/u16:4+events_unbound	23:57:41	4
4152523	99	21	19,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	23:30:33	4
4152535	99	20	17,2	cyclictest	485054	-21	ntpq	23:52:06	7
4152523	99	20	18,2	cyclictest	3887171	-21	kworker/u16:2+flush-8:0	20:31:36	4
4152523	99	20	18,2	cyclictest	222794	-21	kworker/u16:4+flush-8:0	22:23:41	4
4152523	99	20	18,2	cyclictest	212365	-21	kworker/u16:0+events_unbound	22:52:09	4
4152523	99	20	18,2	cyclictest	172224	-21	kworker/u16:0+events_unbound	21:53:33	4
4152535	99	19	14,4	cyclictest	4188338	-21	cat	19:36:52	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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