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 Apr 12, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
782761	99	62	59,2	cyclictest	1100043	-21	kworker/u16:1+events_unbound	09:42:09	4
782761	99	61	58,2	cyclictest	753602	-21	kworker/u16:1+events_unbound	08:07:10	4
782304	2	58	48,7	sleep4	0	-21	swapper/4	06:59:23	4
782231	2	58	48,7	sleep5	0	-21	swapper/5	06:58:19	5
782761	99	56	53,2	cyclictest	1016538	-21	kworker/u16:0+flush-8:0	09:27:10	4
782770	99	54	0,52	cyclictest	1148223	-21	latency_hist	09:56:55	7
782770	99	53	52,0	cyclictest	0	-21	swapper/7	11:37:10	7
782761	99	53	51,2	cyclictest	1434523	-21	kworker/u16:1+events_unbound	12:02:10	4
782761	99	50	48,2	cyclictest	1232365	-21	kworker/u16:1+events_unbound	11:22:14	4
782761	99	50	48,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	11:27:25	4
782761	99	50	47,2	cyclictest	1232365	-21	kworker/u16:1+flush-8:0	11:02:25	4
782761	99	49	47,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:47:09	4
782761	99	49	47,2	cyclictest	1280119	-21	kworker/u16:0+events_unbound	10:52:30	4
782761	99	49	47,2	cyclictest	1133181	-21	kworker/u16:7+flush-8:0	10:32:29	4
782761	99	48	46,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	10:27:12	4
782761	99	48	45,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	10:12:09	4
782232	2	48	38,7	sleep6	0	-21	swapper/6	06:58:20	6
782761	99	47	45,2	cyclictest	1112008	-21	kworker/u16:4+events_unbound	10:08:53	4
782761	99	47	44,2	cyclictest	843984	-21	kworker/u16:0+flush-8:0	08:12:13	4
776899	2	47	3,37	sleep7	0	-21	swapper/7	06:57:17	7
782766	99	46	44,2	cyclictest	1062064	-21	kworker/u16:2+flush-8:0	10:11:55	6
782761	99	46	44,2	cyclictest	769949	-21	kworker/u16:3+flush-8:0	07:22:21	4
782761	99	45	43,2	cyclictest	1363143	-21	kworker/u16:0+flush-8:0	11:37:24	4
782761	99	45	43,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	10:22:24	4
782766	99	44	41,3	cyclictest	1062064	-21	kworker/u16:2+flush-8:0	09:42:21	6
782761	99	44	42,2	cyclictest	891267	-21	kworker/u16:2+events_unbound	08:42:25	4
782761	99	44	42,2	cyclictest	1232365	-21	kworker/u16:1+events_unbound	11:07:45	4
782766	99	43	41,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	09:32:26	6
782761	99	43	41,2	cyclictest	1413556	-21	kworker/u16:2+events_unbound	12:25:57	4
782761	99	43	41,2	cyclictest	1413556	-21	kworker/u16:2+events_unbound	12:11:57	4
782761	99	43	41,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	12:21:16	4
782761	99	43	41,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:56:22	4
782761	99	43	41,2	cyclictest	1232365	-21	kworker/u16:1+events_unbound	10:48:57	4
782761	99	43	41,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	09:57:25	4
782761	99	43	41,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	09:57:25	4
782761	99	43	41,2	cyclictest	1112008	-21	kworker/u16:4+events_unbound	09:51:10	4
782761	99	43	41,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:35:13	4
782761	99	43	41,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:16:54	4
782766	99	42	40,2	cyclictest	753602	-21	kworker/u16:1+flush-8:0	07:11:55	6
782761	99	42	40,2	cyclictest	929824	-21	kworker/u16:1+events_unbound	09:03:33	4
782761	99	42	40,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	12:11:37	4
782761	99	42	40,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:58:14	4
782761	99	42	40,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:58:14	4
782761	99	42	40,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:44:45	4
782770	99	41	40,0	cyclictest	0	-21	swapper/7	10:27:37	7
782770	99	41	36,4	cyclictest	1436134	-21	sed	11:56:54	7
782770	99	40	33,1	cyclictest	1410523	-21	ssh	11:44:04	7
782765	99	40	38,2	cyclictest	1363143	-21	kworker/u16:0+flush-8:0	11:47:21	5
782761	99	40	38,2	cyclictest	1232365	-21	kworker/u16:1+flush-8:0	11:12:42	4
782761	99	40	38,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	11:20:29	4
782761	99	40	38,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	10:39:01	4
782761	99	40	38,2	cyclictest	1112008	-21	kworker/u16:4+events_unbound	10:19:30	4
782761	99	40	38,2	cyclictest	1062064	-21	kworker/u16:2+flush-8:0	10:42:23	4
782770	99	39	38,0	cyclictest	0	-21	swapper/7	08:12:25	7
782770	99	39	38,0	cyclictest	0	-21	swapper/7	08:06:58	7
782761	99	39	37,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	10:04:02	4
782761	99	39	37,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:40:10	4
782761	99	39	36,2	cyclictest	753602	-21	kworker/u16:1+events_unbound	07:12:09	4
782761	99	39	36,2	cyclictest	753602	-21	kworker/u16:1+events_unbound	07:12:09	4
782770	99	38	37,0	cyclictest	0	-21	swapper/7	10:38:36	7
782770	99	38	37,0	cyclictest	0	-21	swapper/7	10:16:56	7
782761	99	38	36,2	cyclictest	1508267	-21	kworker/u16:1+events_unbound	12:29:53	4
782761	99	38	36,2	cyclictest	1363143	-21	kworker/u16:0+events_unbound	11:36:01	4
782761	99	38	35,2	cyclictest	769949	-21	kworker/u16:3+events_unbound	07:27:10	4
1134857	2	38	0,0	sleep7	1134858	-21	sh	09:49:29	7
782770	99	37	33,2	cyclictest	842820	-21	ntpq	07:27:22	7
782766	99	37	35,2	cyclictest	1232365	-21	kworker/u16:1+events_unbound	10:37:10	6
782766	99	37	34,3	cyclictest	891267	-21	kworker/u16:2+flush-8:0	08:52:21	6
782766	99	37	34,2	cyclictest	968181	-21	kworker/u16:3+events_unbound	09:22:09	6
782761	99	37	35,2	cyclictest	968181	-21	kworker/u16:3+events_unbound	09:16:58	4
782761	99	37	35,2	cyclictest	968181	-21	kworker/u16:3+events_unbound	09:16:58	4
782761	99	37	35,2	cyclictest	929824	-21	kworker/u16:1+events_unbound	09:09:42	4
782761	99	37	35,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	09:54:30	4
782761	99	37	34,2	cyclictest	843984	-21	kworker/u16:0+flush-8:0	07:51:55	4
782766	99	36	34,2	cyclictest	1133181	-21	kworker/u16:7+events_unbound	09:52:26	6
782765	99	36	34,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:12:23	5
782761	99	36	34,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:23:19	4
782770	99	35	34,0	cyclictest	0	-21	swapper/7	10:02:56	7
782770	99	35	33,1	cyclictest	1015763	-21	diskmemload	10:59:28	7
782770	99	35	33,1	cyclictest	1015763	-21	diskmemload	10:36:27	7
782770	99	35	31,2	cyclictest	1518435	-21	ssh	12:29:24	7
782766	99	35	32,2	cyclictest	1413556	-21	kworker/u16:2+flush-8:0	11:53:05	6
782761	99	35	33,2	cyclictest	843984	-21	kworker/u16:0+events_unbound	07:42:11	4
782761	99	35	33,2	cyclictest	753602	-21	kworker/u16:1+events_unbound	07:17:18	4
782761	99	35	33,2	cyclictest	1280119	-21	kworker/u16:0+events_unbound	10:59:17	4
782761	99	35	32,2	cyclictest	891267	-21	kworker/u16:2+events_unbound	08:16:58	4
782770	99	34	33,0	cyclictest	0	-21	swapper/7	10:42:28	7
782770	99	34	29,4	cyclictest	967968	-21	latency_hist	08:36:55	7
782766	99	34	32,2	cyclictest	1340205	-21	kworker/u16:3+flush-8:0	12:12:26	6
782761	99	34	32,2	cyclictest	968181	-21	kworker/u16:3+events_unbound	08:57:22	4
782770	99	33	31,1	cyclictest	0	-21	swapper/7	09:40:00	7
782770	99	33	30,2	cyclictest	948525	-21	unixbench_singl	08:22:27	7
782766	99	33	31,2	cyclictest	1434523	-21	kworker/u16:1+flush-8:0	11:57:21	6
782766	99	33	31,2	cyclictest	1434523	-21	kworker/u16:1+flush-8:0	11:57:21	6
782766	99	33	31,2	cyclictest	1340205	-21	kworker/u16:3+events_unbound	11:42:26	6
782766	99	33	31,2	cyclictest	1062064	-21	kworker/u16:2+events_unbound	09:27:14	6
782766	99	33	31,2	cyclictest	1016538	-21	kworker/u16:0+events_unbound	09:12:13	6
782765	99	33	31,2	cyclictest	968181	-21	kworker/u16:3+events_unbound	09:37:22	5
782761	99	33	31,2	cyclictest	891267	-21	kworker/u16:2+flush-8:0	08:47:15	4
782770	99	32	31,0	cyclictest	0	-21	swapper/7	08:55:05	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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