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 Dec 09, 2025 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
778548	2	67	55,8	sleep4	0	-21	swapper/4	03:20:02	4
779070	99	54	52,2	cyclictest	1281715	-21	kworker/u16:4+events_unbound	08:12:53	6
778467	2	48	38,7	sleep5	0	-21	swapper/5	03:18:59	5
778448	2	47	35,8	sleep6	0	-21	swapper/6	03:18:44	6
779075	99	46	41,4	cyclictest	789019	-21	latency_hist	03:27:26	7
779068	99	45	43,2	cyclictest	793335	-21	kworker/u16:4+flush-8:0	03:29:35	5
779070	99	44	42,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:37:54	6
779070	99	44	41,2	cyclictest	883537	-21	kworker/u16:0+flush-8:0	04:22:25	6
779068	99	44	42,2	cyclictest	1216893	-21	kworker/u16:3+flush-8:0	07:09:50	5
778619	2	43	10,29	sleep7	0	-21	swapper/7	03:21:02	7
779070	99	42	40,2	cyclictest	769079	-21	kworker/u16:0+events_unbound	03:32:54	6
779068	99	41	39,2	cyclictest	994855	-21	kworker/u16:1+events_unbound	05:08:55	5
779068	99	41	39,2	cyclictest	1351454	-21	kworker/u16:1+events_unbound	08:21:36	5
779068	99	41	39,2	cyclictest	1266718	-21	kworker/u16:0+events_unbound	07:34:54	5
779070	99	40	38,2	cyclictest	994855	-21	kworker/u16:1+events_unbound	05:48:59	6
779070	99	40	37,2	cyclictest	1116068	-21	kworker/u16:0+flush-8:0	06:42:55	6
779068	99	40	38,2	cyclictest	1125872	-21	kworker/u16:3+events_unbound	06:40:54	5
779075	99	39	37,1	cyclictest	1215552	-21	ntpq	06:52:50	7
779070	99	39	37,2	cyclictest	994855	-21	kworker/u16:1+events_unbound	06:28:00	6
779068	99	39	37,2	cyclictest	1266718	-21	kworker/u16:0+events_unbound	07:20:54	5
779070	99	38	36,2	cyclictest	803445	-21	kworker/u16:1+flush-8:0	03:49:44	6
779068	99	38	36,2	cyclictest	793335	-21	kworker/u16:4+flush-8:0	03:38:44	5
779060	99	38	34,3	cyclictest	823020	-21	kworker/u16:3+flush-8:0	04:22:43	4
779075	99	37	32,4	cyclictest	853459	-21	latency_hist	03:57:25	7
779075	99	37	0,35	cyclictest	1408086	-21	latency_hist	08:32:25	7
779068	99	37	35,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	04:13:36	5
779060	99	37	35,2	cyclictest	1186057	-21	kworker/u16:4+flush-8:0	06:47:54	4
779068	99	36	34,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	04:28:51	5
779068	99	36	34,2	cyclictest	1351454	-21	kworker/u16:1+events_unbound	08:05:54	5
779075	99	35	0,34	cyclictest	924084	-21	latency_hist	04:32:26	7
779068	99	35	33,2	cyclictest	1307371	-21	kworker/u16:3+events_unbound	08:01:48	5
779068	99	35	33,2	cyclictest	1044839	-21	kworker/u16:2+events_unbound	06:15:53	5
779068	99	35	32,2	cyclictest	1054974	-21	kworker/u16:0+events_unbound	05:37:19	5
779070	99	34	32,2	cyclictest	693034	-21	kworker/u16:2+flush-8:0	03:47:21	6
779068	99	34	32,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:08:55	5
779068	99	34	32,2	cyclictest	893859	-21	kworker/u16:4+flush-8:0	04:57:51	5
779068	99	34	32,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	04:10:35	5
779068	99	34	32,2	cyclictest	1044839	-21	kworker/u16:2+events_unbound	05:56:36	5
779060	99	34	32,2	cyclictest	1281715	-21	kworker/u16:4+flush-8:0	08:22:53	4
779060	99	34	30,3	cyclictest	1116068	-21	kworker/u16:0+flush-8:0	06:37:43	4
779068	99	33	31,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:54:35	5
779068	99	33	31,2	cyclictest	863951	-21	kworker/u16:1+events_unbound	04:04:35	5
779068	99	33	31,2	cyclictest	1281715	-21	kworker/u16:4+flush-8:0	08:24:35	5
779068	99	33	31,2	cyclictest	1266718	-21	kworker/u16:0+flush-8:0	07:30:07	5
779068	99	33	30,2	cyclictest	1368101	-21	kworker/u16:0+flush-8:0	08:32:34	5
779068	99	32	30,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:00:54	5
779068	99	32	30,2	cyclictest	953380	-21	kworker/u16:2+flush-8:0	04:46:07	5
779068	99	32	30,2	cyclictest	863226	-21	kworker/u16:5+events_unbound	03:58:00	5
779068	99	32	30,2	cyclictest	823020	-21	kworker/u16:3+flush-8:0	04:35:35	5
779068	99	32	30,2	cyclictest	1307371	-21	kworker/u16:3+events_unbound	07:50:53	5
779068	99	32	30,2	cyclictest	1266718	-21	kworker/u16:0+flush-8:0	07:53:24	5
779068	99	32	30,2	cyclictest	1024729	-21	kworker/u16:3+events_unbound	05:20:54	5
779075	99	31	30,0	cyclictest	0	-21	swapper/7	06:37:54	7
779070	99	31	29,2	cyclictest	769079	-21	kworker/u16:0+events_unbound	03:28:45	6
779070	99	31	29,2	cyclictest	1200344	-21	kworker/u16:2+flush-8:0	07:17:21	6
779068	99	31	29,2	cyclictest	994855	-21	kworker/u16:1+events_unbound	06:49:55	5
779068	99	31	29,2	cyclictest	913778	-21	kworker/u16:1+events_unbound	04:53:28	5
779068	99	31	29,2	cyclictest	769079	-21	kworker/u16:0+flush-8:0	03:25:35	5
779068	99	31	29,2	cyclictest	1125872	-21	kworker/u16:3+events_unbound	06:45:55	5
779068	99	31	29,2	cyclictest	1064997	-21	kworker/u16:4+events_unbound	05:39:28	5
779060	99	31	28,2	cyclictest	1266718	-21	kworker/u16:0+flush-8:0	07:22:55	4
779075	99	30	25,4	cyclictest	1055171	-21	latency_hist	05:37:25	7
779070	99	30	28,2	cyclictest	883537	-21	kworker/u16:0+flush-8:0	04:39:40	6
779068	99	30	28,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:28:56	5
779068	99	30	28,2	cyclictest	893859	-21	kworker/u16:4+flush-8:0	04:41:53	5
779068	99	30	28,2	cyclictest	1307371	-21	kworker/u16:3+events_unbound	08:08:56	5
779068	99	30	28,2	cyclictest	1200344	-21	kworker/u16:2+events_unbound	07:06:00	5
779075	99	29	28,0	cyclictest	0	-21	swapper/7	07:56:43	7
779075	99	29	24,4	cyclictest	863558	-21	latency_hist	04:02:25	7
779070	99	29	27,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	04:29:40	6
779068	99	29	27,2	cyclictest	893859	-21	kworker/u16:4+events_unbound	05:16:54	5
779068	99	29	27,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	05:25:53	5
779068	99	29	27,2	cyclictest	1216893	-21	kworker/u16:3+events_unbound	07:25:51	5
779068	99	29	27,2	cyclictest	1186057	-21	kworker/u16:4+flush-8:0	07:14:27	5
779068	99	29	27,2	cyclictest	1044839	-21	kworker/u16:2+events_unbound	05:45:55	5
779068	99	29	26,2	cyclictest	793335	-21	kworker/u16:4+flush-8:0	03:42:36	5
779075	99	28	0,26	cyclictest	1236686	-21	latency_hist	07:07:25	7
779068	99	28	26,2	cyclictest	769079	-21	kworker/u16:0+events_unbound	03:37:17	5
779068	99	28	26,2	cyclictest	1407864	-21	kworker/u16:5+flush-8:0	08:44:58	5
779068	99	28	26,2	cyclictest	1116068	-21	kworker/u16:0+events_unbound	06:21:35	5
779075	99	27	26,0	cyclictest	0	-21	swapper/7	08:50:18	7
779075	99	27	26,0	cyclictest	0	-21	swapper/7	04:40:03	7
779075	99	27	26,0	cyclictest	0	-21	swapper/7	03:48:00	7
779070	99	27	25,2	cyclictest	1064997	-21	kworker/u16:4+flush-8:0	05:57:21	6
779068	99	27	25,2	cyclictest	994855	-21	kworker/u16:1+flush-8:0	06:04:18	5
779068	99	27	25,2	cyclictest	893859	-21	kworker/u16:4+flush-8:0	04:52:07	5
779068	99	27	25,2	cyclictest	1307024	-21	kworker/u16:1+events_unbound	07:41:07	5
779075	99	26	25,0	cyclictest	0	-21	swapper/7	06:58:39	7
779075	99	26	25,0	cyclictest	0	-21	swapper/7	05:25:37	7
779075	99	26	21,4	cyclictest	1145957	-21	latency_hist	06:22:25	7
779075	99	26	0,24	cyclictest	1347538	-21	latency_hist	08:02:25	7
779070	99	26	23,2	cyclictest	883537	-21	kworker/u16:0+flush-8:0	05:27:27	6
779068	99	26	24,2	cyclictest	1116068	-21	kworker/u16:0+events_unbound	06:26:28	5
779060	99	26	23,2	cyclictest	769079	-21	kworker/u16:0+flush-8:0	03:27:28	4
779075	99	25	24,0	cyclictest	0	-21	swapper/7	06:51:03	7
779075	99	25	24,0	cyclictest	0	-21	swapper/7	04:34:47	7
779075	99	25	23,1	cyclictest	1418509	-21	cat	08:37:25	7
779070	99	25	23,2	cyclictest	883537	-21	kworker/u16:0+flush-8:0	04:57:55	6
779070	99	25	23,2	cyclictest	883537	-21	kworker/u16:0+events_unbound	04:22:28	6
779070	99	25	23,2	cyclictest	769079	-21	kworker/u16:0+events_unbound	03:25:44	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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