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 Mon Mar 09, 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
141305	99	59	57,2	cyclictest	589510	-21	kworker/u16:3+events_unbound	22:34:39	5
140892	2	58	48,7	sleep4	0	-21	swapper/4	19:02:28	4
141305	99	56	54,2	cyclictest	623343	-21	kworker/u16:1+events_unbound	23:14:44	5
141305	99	55	53,2	cyclictest	589510	-21	kworker/u16:3+events_unbound	22:54:27	5
141305	99	53	51,2	cyclictest	623344	-21	kworker/u16:4+events_unbound	23:04:44	5
141305	99	53	50,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	21:39:26	5
141307	99	52	50,2	cyclictest	623343	-21	kworker/u16:1+events_unbound	22:54:40	6
141305	99	52	50,2	cyclictest	765570	-21	kworker/u16:4+events_unbound	23:49:39	5
141305	99	52	49,2	cyclictest	623344	-21	kworker/u16:4+events_unbound	22:59:26	5
141305	99	52	49,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	21:59:26	5
141305	99	52	49,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	20:19:28	5
141307	99	51	49,2	cyclictest	455547	-21	kworker/u16:0+flush-8:0	21:49:42	6
141307	99	51	49,2	cyclictest	455547	-21	kworker/u16:0+flush-8:0	21:49:42	6
141305	99	50	48,2	cyclictest	780115	-21	kworker/u16:1+flush-8:0	23:54:27	5
141307	99	49	47,2	cyclictest	589510	-21	kworker/u16:3+events_unbound	22:44:44	6
141305	99	49	47,2	cyclictest	490667	-21	kworker/u16:2+flush-8:0	21:54:27	5
141305	99	49	47,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	21:44:27	5
141307	99	48	45,2	cyclictest	765570	-21	kworker/u16:4+events_unbound	23:59:14	6
141305	99	48	46,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:29:42	5
141305	99	46	44,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	00:09:31	5
141305	99	46	44,2	cyclictest	366412	-21	kworker/u16:2+flush-8:0	21:24:39	5
141307	99	45	43,2	cyclictest	122072	-21	kworker/u16:3+events_unbound	19:34:43	6
141305	99	45	43,2	cyclictest	837132	-21	kworker/u16:0+events_unbound	00:23:55	5
141310	99	44	39,3	cyclictest	568803	-21	tr	22:24:31	7
141307	99	44	42,2	cyclictest	457891	-21	kworker/u16:4+events_unbound	22:24:41	6
141307	99	44	42,2	cyclictest	457891	-21	kworker/u16:4+events_unbound	21:43:07	6
141307	99	44	42,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:34:44	6
141305	99	44	43,1	cyclictest	490667	-21	kworker/u16:2+events_unbound	21:49:46	5
141305	99	44	43,1	cyclictest	490667	-21	kworker/u16:2+events_unbound	21:49:46	5
141305	99	44	42,2	cyclictest	733786	-21	kworker/u16:1+events_unbound	23:40:50	5
141305	99	44	42,2	cyclictest	585754	-21	kworker/u16:0+flush-8:0	22:29:42	5
141305	99	44	42,2	cyclictest	428884	-21	kworker/u16:3+events_unbound	21:34:35	5
141305	99	43	41,2	cyclictest	684958	-21	kworker/u16:2+flush-8:0	23:59:40	5
141305	99	43	41,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	23:21:19	5
141307	99	42	40,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	23:49:02	6
141307	99	42	40,2	cyclictest	589510	-21	kworker/u16:3+events_unbound	22:52:14	6
141307	99	42	40,2	cyclictest	355283	-21	kworker/u16:0+events_unbound	21:20:36	6
141305	99	42	40,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	23:48:23	5
141305	99	42	40,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	23:32:43	5
141307	99	41	39,2	cyclictest	815416	-21	kworker/u16:3+events_unbound	00:10:14	6
141307	99	41	39,2	cyclictest	672993	-21	kworker/u16:0+events_unbound	23:53:51	6
141307	99	41	39,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:07:19	6
141307	99	41	39,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	21:29:26	6
141305	99	41	39,2	cyclictest	706059	-21	kworker/u16:3+events_unbound	23:27:32	5
141305	99	41	39,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:39:34	5
141310	99	40	36,3	cyclictest	212066	-21	latency_hist	19:39:12	7
141310	99	40	0,38	cyclictest	542861	-21	irqcore	22:14:30	7
141307	99	40	38,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	00:15:02	6
141307	99	40	38,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:37:44	6
141307	99	40	38,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:06:36	6
141307	99	40	37,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	00:05:39	6
141305	99	40	38,2	cyclictest	623343	-21	kworker/u16:1+events_unbound	23:09:28	5
141305	99	40	38,2	cyclictest	623343	-21	kworker/u16:1+events_unbound	23:09:28	5
141305	99	40	38,2	cyclictest	490667	-21	kworker/u16:2+events_unbound	22:27:11	5
141305	99	40	38,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:09:51	5
141305	99	40	37,2	cyclictest	355283	-21	kworker/u16:0+events_unbound	21:19:16	5
141310	99	39	37,1	cyclictest	150833	-21	latency_hist	19:09:13	7
141310	99	39	36,2	cyclictest	860236	-21	ntpq	00:24:38	7
141310	99	39	36,2	cyclictest	753183	-21	smart_sda	23:39:43	7
141307	99	39	37,2	cyclictest	851602	-21	kworker/u16:5+events_unbound	00:25:31	6
141307	99	39	37,2	cyclictest	837132	-21	kworker/u16:0+events_unbound	00:21:31	6
141307	99	39	37,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	23:29:41	6
141305	99	39	37,2	cyclictest	837132	-21	kworker/u16:0+flush-8:0	00:14:58	5
141305	99	39	37,2	cyclictest	803321	-21	kworker/u16:1+events_unbound	00:26:26	5
141305	99	39	37,2	cyclictest	684958	-21	kworker/u16:2+events_unbound	00:04:34	5
141305	99	39	37,2	cyclictest	623344	-21	kworker/u16:4+events_unbound	22:52:18	5
141305	99	39	37,2	cyclictest	623344	-21	kworker/u16:4+events_unbound	22:49:00	5
141305	99	39	37,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:09:40	5
141305	99	39	37,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:09:40	5
141305	99	39	37,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:08:14	5
141305	99	39	36,2	cyclictest	280649	-21	kworker/u16:1+flush-8:0	20:44:28	5
140709	2	39	3,31	sleep7	0	-21	swapper/7	18:59:50	7
141307	99	38	36,2	cyclictest	780158	-21	kworker/u16:3+events_unbound	23:56:26	6
141307	99	38	36,2	cyclictest	672993	-21	kworker/u16:0+events_unbound	23:12:51	6
141307	99	38	36,2	cyclictest	672993	-21	kworker/u16:0+events_unbound	23:12:51	6
141307	99	38	36,2	cyclictest	540604	-21	kworker/u16:0+events_unbound	22:12:55	6
141307	99	38	36,2	cyclictest	503522	-21	kworker/u16:5+events_unbound	21:57:15	6
141307	99	38	36,2	cyclictest	457891	-21	kworker/u16:4+events_unbound	22:29:59	6
141305	99	38	37,1	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:16:40	5
141305	99	38	36,2	cyclictest	280649	-21	kworker/u16:1+flush-8:0	20:59:35	5
141305	99	38	36,2	cyclictest	184836	-21	kworker/u16:4+flush-8:0	19:39:39	5
140764	2	38	28,7	sleep6	0	-21	swapper/6	19:00:37	6
141307	99	37	35,2	cyclictest	851602	-21	kworker/u16:5+events_unbound	00:30:14	6
141307	99	37	35,2	cyclictest	851602	-21	kworker/u16:5+events_unbound	00:30:14	6
141307	99	37	35,2	cyclictest	589510	-21	kworker/u16:3+events_unbound	23:01:11	6
141307	99	37	35,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:17:27	6
141307	99	37	35,2	cyclictest	280649	-21	kworker/u16:1+flush-8:0	20:19:38	6
141307	99	37	35,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:19:04	6
141307	99	37	35,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	20:49:36	6
141305	99	37	35,2	cyclictest	280649	-21	kworker/u16:1+events_unbound	22:24:11	5
141307	99	36	34,2	cyclictest	706059	-21	kworker/u16:3+events_unbound	23:37:54	6
141307	99	36	34,2	cyclictest	623343	-21	kworker/u16:1+events_unbound	23:06:08	6
141307	99	36	34,2	cyclictest	585754	-21	kworker/u16:0+events_unbound	22:43:50	6
141307	99	36	34,2	cyclictest	428884	-21	kworker/u16:3+events_unbound	21:26:03	6
141307	99	36	34,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:11:27	6
141307	99	36	34,2	cyclictest	366412	-21	kworker/u16:2+events_unbound	21:11:27	6
141307	99	36	34,2	cyclictest	280649	-21	kworker/u16:1+flush-8:0	22:19:58	6
141307	99	36	34,2	cyclictest	280649	-21	kworker/u16:1+flush-8:0	21:44:46	6
141305	99	36	34,2	cyclictest	851602	-21	kworker/u16:5+events_unbound	00:29:45	5
141305	99	36	34,2	cyclictest	851602	-21	kworker/u16:5+events_unbound	00:29:45	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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