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 05, 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
585644	2	98	0,1	sleep7	585646	-21	tr	11:37:46	7
585644	2	98	0,1	sleep7	585646	-21	tr	11:37:46	7
4161173	2	61	49,8	sleep6	0	-21	swapper/6	06:58:51	6
4161370	2	59	48,8	sleep5	0	-21	swapper/5	07:01:39	5
4161707	99	58	56,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	12:07:37	4
4161707	99	53	51,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:27:53	4
4161707	99	53	50,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:42:40	4
4161707	99	51	48,2	cyclictest	601556	-21	kworker/u16:1+events_unbound	12:17:24	4
4161707	99	51	48,2	cyclictest	601556	-21	kworker/u16:1+events_unbound	12:17:24	4
4161310	2	51	41,7	sleep4	0	-21	swapper/4	07:00:49	4
4161707	99	50	48,2	cyclictest	358519	-21	kworker/u16:2+flush-8:0	10:42:41	4
4161717	99	49	46,2	cyclictest	38828	-21	kworker/u16:0+events_unbound	08:52:23	6
4161707	99	49	47,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	12:12:54	4
4161721	99	48	46,1	cyclictest	453278	-21	switchtime	10:42:54	7
4161721	99	46	43,2	cyclictest	392598	-21	smart_sda	10:17:53	7
4161721	99	46	43,2	cyclictest	392598	-21	smart_sda	10:17:53	7
4161707	99	46	44,2	cyclictest	358519	-21	kworker/u16:2+events_unbound	10:36:33	4
4161707	99	46	44,2	cyclictest	213581	-21	kworker/u16:3+events_unbound	09:41:01	4
4161707	99	46	44,2	cyclictest	213581	-21	kworker/u16:3+events_unbound	09:41:01	4
4161707	99	45	43,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:17:10	4
4161717	99	44	42,2	cyclictest	358519	-21	kworker/u16:2+events_unbound	11:42:50	6
4161707	99	44	42,2	cyclictest	554506	-21	kworker/u16:0+flush-8:0	11:37:52	4
4161707	99	44	42,2	cyclictest	554506	-21	kworker/u16:0+flush-8:0	11:37:52	4
4161721	99	43	40,2	cyclictest	67440	-21	awk	07:52:23	7
4161717	99	43	41,2	cyclictest	38828	-21	kworker/u16:0+flush-8:0	08:12:23	6
4161707	99	43	41,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:57:51	4
4161707	99	43	41,2	cyclictest	274698	-21	kworker/u16:1+events_unbound	10:29:53	4
4161707	99	43	41,2	cyclictest	191801	-21	kworker/u16:2+events_unbound	09:20:05	4
4161717	99	42	40,2	cyclictest	671624	-21	kworker/u16:4+flush-8:0	12:27:22	6
4161707	99	42	40,2	cyclictest	601556	-21	kworker/u16:1+events_unbound	12:05:54	4
4161707	99	42	40,2	cyclictest	601556	-21	kworker/u16:1+events_unbound	11:52:56	4
4161707	99	42	40,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:21:22	4
4161707	99	42	40,2	cyclictest	332733	-21	kworker/u16:0+events_unbound	10:05:46	4
4161717	99	41	38,3	cyclictest	274699	-21	kworker/u16:2+events_unbound	09:37:50	6
4161717	99	41	38,3	cyclictest	274699	-21	kworker/u16:2+events_unbound	09:37:50	6
4161707	99	41	39,2	cyclictest	601556	-21	kworker/u16:1+events_unbound	12:28:52	4
4161707	99	41	39,2	cyclictest	554506	-21	kworker/u16:0+events_unbound	11:50:57	4
4161707	99	41	39,2	cyclictest	554506	-21	kworker/u16:0+events_unbound	11:33:41	4
4161707	99	41	39,2	cyclictest	426663	-21	kworker/u16:0+events_unbound	10:38:42	4
4161707	99	41	39,2	cyclictest	274699	-21	kworker/u16:2+events_unbound	09:51:50	4
4161707	99	40	38,2	cyclictest	671624	-21	kworker/u16:4+events_unbound	12:26:13	4
4161707	99	40	38,2	cyclictest	528125	-21	kworker/u16:1+events_unbound	11:23:45	4
4161707	99	40	38,2	cyclictest	440846	-21	kworker/u16:3+events_unbound	10:49:29	4
4161707	99	40	38,2	cyclictest	426663	-21	kworker/u16:0+events_unbound	11:03:24	4
4161707	99	40	38,2	cyclictest	237731	-21	kworker/u16:0+events_unbound	09:25:21	4
4161707	99	40	38,2	cyclictest	213581	-21	kworker/u16:3+events_unbound	09:10:14	4
4161707	99	39	37,2	cyclictest	509404	-21	kworker/u16:3+events_unbound	11:10:49	4
4161707	99	39	37,2	cyclictest	406448	-21	kworker/u16:3+events_unbound	10:27:14	4
4161707	99	39	37,2	cyclictest	358519	-21	kworker/u16:2+events_unbound	10:59:33	4
4161707	99	39	37,2	cyclictest	358519	-21	kworker/u16:2+events_unbound	10:59:33	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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