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 50 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
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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