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 Sat Apr 04, 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
85826	2	59	48,8	sleep5	0	-21	swapper/5	19:02:01	5
85798	2	58	48,7	sleep6	0	-21	swapper/6	19:01:38	6
86160	99	49	44,4	cyclictest	607710	-21	latency_hist	23:02:28	7
86156	99	46	44,2	cyclictest	542402	-21	kworker/u16:0+events_unbound	22:47:31	6
86156	99	44	42,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	22:38:51	6
86156	99	41	39,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	23:54:52	6
85588	2	41	13,8	sleep4	0	-21	swapper/4	18:58:39	4
86156	99	40	38,2	cyclictest	559573	-21	kworker/u16:1+events_unbound	22:55:51	6
86156	99	40	38,2	cyclictest	439360	-21	kworker/u16:4+events_unbound	22:07:27	6
86156	99	40	38,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	21:28:20	6
86156	99	40	38,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	22:08:12	6
86152	99	40	38,2	cyclictest	309340	-21	kworker/u16:1+events_unbound	21:37:52	5
86150	99	40	38,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:27:58	4
86150	99	40	38,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:27:58	4
86156	99	39	37,2	cyclictest	593479	-21	kworker/u16:4+events_unbound	23:17:11	6
86156	99	39	37,2	cyclictest	439360	-21	kworker/u16:4+events_unbound	22:25:20	6
86156	99	39	37,2	cyclictest	439360	-21	kworker/u16:4+events_unbound	22:13:32	6
86156	99	39	37,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	00:06:28	6
86156	99	39	37,2	cyclictest	309340	-21	kworker/u16:1+events_unbound	21:15:16	6
86156	99	39	37,2	cyclictest	147171	-21	kworker/u16:1+flush-8:0	19:47:24	6
76741	2	39	3,31	sleep7	0	-21	swapper/7	18:57:38	7
86156	99	38	37,1	cyclictest	331292	-21	kworker/u16:0+events_unbound	21:11:55	6
86156	99	38	37,1	cyclictest	331292	-21	kworker/u16:0+events_unbound	21:11:55	6
86156	99	38	36,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:23:59	6
86156	99	38	36,2	cyclictest	542402	-21	kworker/u16:0+flush-8:0	22:44:35	6
86156	99	38	36,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	22:37:27	6
86156	99	38	36,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	21:23:44	6
86156	99	37	35,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:28:19	6
86156	99	37	35,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:28:19	6
86156	99	37	35,2	cyclictest	593479	-21	kworker/u16:4+events_unbound	23:19:43	6
86156	99	37	35,2	cyclictest	403774	-21	kworker/u16:0+events_unbound	21:46:15	6
86156	99	37	35,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	21:53:36	6
86156	99	37	35,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	21:53:36	6
86156	99	36	34,2	cyclictest	680156	-21	kworker/u16:5+events_unbound	00:14:11	6
86156	99	36	34,2	cyclictest	593479	-21	kworker/u16:4+events_unbound	23:31:35	6
86156	99	36	34,2	cyclictest	559573	-21	kworker/u16:1+events_unbound	23:03:36	6
86156	99	36	34,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	22:02:28	6
86156	99	35	34,1	cyclictest	3581050	-21	kworker/u16:2+events_unbound	21:40:07	6
86156	99	35	33,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	00:21:48	6
86156	99	35	33,2	cyclictest	559573	-21	kworker/u16:1+events_unbound	23:38:39	6
86156	99	35	33,2	cyclictest	403774	-21	kworker/u16:0+flush-8:0	21:48:16	6
86156	99	35	33,2	cyclictest	403774	-21	kworker/u16:0+flush-8:0	21:48:16	6
86156	99	35	33,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	23:09:36	6
86156	99	35	33,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	23:09:36	6
86150	99	35	33,2	cyclictest	739821	-21	kworker/u16:3+flush-8:0	00:12:59	4
86156	99	34	32,2	cyclictest	680156	-21	kworker/u16:5+events_unbound	00:10:03	6
86156	99	34	32,2	cyclictest	559573	-21	kworker/u16:1+events_unbound	23:26:51	6
86150	99	34	32,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	23:32:24	4
86150	99	34	31,2	cyclictest	309340	-21	kworker/u16:1+flush-8:0	21:37:47	4
86160	99	33	32,0	cyclictest	0	-21	swapper/7	23:47:52	7
86160	99	33	32,0	cyclictest	0	-21	swapper/7	23:47:52	7
86156	99	33	31,2	cyclictest	728196	-21	kworker/u16:1+events_unbound	23:58:35	6
86156	99	33	31,2	cyclictest	715874	-21	kworker/u16:0+events_unbound	23:49:12	6
86156	99	33	31,2	cyclictest	715874	-21	kworker/u16:0+events_unbound	23:49:12	6
86156	99	33	31,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	22:27:35	6
86156	99	33	31,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	22:27:35	6
86156	99	33	31,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	21:19:07	6
86156	99	33	31,2	cyclictest	309340	-21	kworker/u16:1+events_unbound	21:36:36	6
86156	99	32	30,2	cyclictest	680156	-21	kworker/u16:5+events_unbound	23:43:20	6
86156	99	32	30,2	cyclictest	309340	-21	kworker/u16:1+events_unbound	21:04:35	6
86156	99	32	29,2	cyclictest	194945	-21	kworker/u16:3+flush-8:0	20:17:30	6
86156	99	31	29,2	cyclictest	559573	-21	kworker/u16:1+events_unbound	23:33:24	6
86156	99	31	29,2	cyclictest	353969	-21	kworker/u16:3+events_unbound	22:18:00	6
86156	99	31	29,2	cyclictest	147171	-21	kworker/u16:1+flush-8:0	19:57:29	6
86150	99	30	28,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	23:22:24	4
86160	99	29	28,0	cyclictest	0	-21	swapper/7	20:47:43	7
86156	99	29	27,2	cyclictest	593479	-21	kworker/u16:4+events_unbound	22:59:47	6
86152	99	29	27,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	21:17:54	5
86150	99	29	27,2	cyclictest	593479	-21	kworker/u16:4+flush-8:0	23:02:47	4
86150	99	29	25,3	cyclictest	680156	-21	kworker/u16:5+events_unbound	23:32:47	4
86152	99	28	25,2	cyclictest	439360	-21	kworker/u16:4+flush-8:0	22:12:34	5
86150	99	28	26,2	cyclictest	542402	-21	kworker/u16:0+flush-8:0	22:48:08	4
86150	99	28	26,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	23:47:24	4
86152	99	27	24,2	cyclictest	331292	-21	kworker/u16:0+events_unbound	21:07:43	5
86152	99	27	24,2	cyclictest	331292	-21	kworker/u16:0+events_unbound	21:07:43	5
86150	99	27	25,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	21:27:49	4
86150	99	27	24,2	cyclictest	439360	-21	kworker/u16:4+flush-8:0	22:27:33	4
86150	99	27	24,2	cyclictest	439360	-21	kworker/u16:4+flush-8:0	22:27:33	4
737914	2	27	0,1	chrt	737913	-21	ssh	23:53:54	7
547347	2	27	0,1	chrt	547348	-21	ssh	22:37:17	7
86152	99	26	23,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	23:37:29	5
330852	2	26	0,1	chrt	330850	-21	ssh	21:06:45	7
86152	99	25	23,2	cyclictest	86352	-21	kworker/u16:3+flush-8:0	19:07:53	5
86152	99	25	22,2	cyclictest	353969	-21	kworker/u16:3+flush-8:0	22:12:29	5
86152	99	24	22,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	21:02:55	5
86152	99	24	22,2	cyclictest	147171	-21	kworker/u16:1+events_unbound	19:37:43	5
86150	99	24	22,2	cyclictest	353969	-21	kworker/u16:3+flush-8:0	21:52:47	4
86150	99	24	22,2	cyclictest	353969	-21	kworker/u16:3+flush-8:0	21:52:47	4
86156	99	23	20,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	20:12:40	6
86152	99	23	21,2	cyclictest	593479	-21	kworker/u16:4+flush-8:0	23:27:58	5
86152	99	23	20,3	cyclictest	353969	-21	kworker/u16:3+flush-8:0	21:57:54	5
86152	99	23	20,2	cyclictest	439360	-21	kworker/u16:4+events_unbound	22:22:45	5
86150	99	23	21,2	cyclictest	542402	-21	kworker/u16:0+events_unbound	22:37:56	4
86160	99	22	20,1	cyclictest	523383	-21	munin-run	22:27:28	7
86156	99	22	19,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	20:32:36	6
86152	99	22	20,2	cyclictest	3581050	-21	kworker/u16:2+events_unbound	20:32:52	5
86152	99	22	19,2	cyclictest	811985	-21	kworker/u16:2+flush-8:0	00:27:33	5
86152	99	22	19,2	cyclictest	811985	-21	kworker/u16:2+flush-8:0	00:27:33	5
86150	99	22	20,2	cyclictest	166585	-21	kworker/u16:0+events_unbound	19:47:51	4
86156	99	21	19,2	cyclictest	3581050	-21	kworker/u16:2+flush-8:0	20:27:39	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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