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 Jul 26, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3065031	2	60	49,8	sleep4	0	-21	swapper/4	07:08:06	4
3065032	2	54	44,7	sleep5	0	-21	swapper/5	07:08:07	5
3064888	2	42	8,29	sleep7	0	-21	swapper/7	07:06:08	7
3065412	99	41	39,2	cyclictest	2991407	-21	kworker/u16:1+events_unbound	07:09:13	4
3065412	99	39	37,2	cyclictest	1622263	-21	kworker/u16:5+flush-8:0	07:44:39	4
3065417	99	38	36,2	cyclictest	3657235	-21	kworker/u16:3+events_unbound	12:02:25	6
3065417	99	37	35,2	cyclictest	3325937	-21	kworker/u16:1+events_unbound	09:24:44	6
3065417	99	37	34,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	12:04:11	6
3065417	99	36	34,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	09:46:10	6
3065416	99	36	34,2	cyclictest	3508509	-21	kworker/u16:1+events_unbound	10:35:08	5
3065416	99	36	34,2	cyclictest	3361644	-21	kworker/u16:2+events_unbound	09:30:48	5
3065416	99	36	33,2	cyclictest	3204959	-21	kworker/u16:3+events_unbound	09:19:12	5
3065412	99	36	34,2	cyclictest	3728930	-21	kworker/u16:1+events_unbound	12:15:46	4
3065412	99	36	34,2	cyclictest	3657235	-21	kworker/u16:3+events_unbound	11:39:04	4
3065412	99	36	34,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	09:42:24	4
3065416	99	35	33,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	12:21:44	5
3065416	99	35	33,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	12:07:24	5
3065416	99	35	33,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	11:36:49	5
3065416	99	35	33,2	cyclictest	3583319	-21	kworker/u16:1+events_unbound	11:01:56	5
3065416	99	35	33,2	cyclictest	3570711	-21	kworker/u16:0+events_unbound	11:26:04	5
3065412	99	35	33,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	11:17:48	4
3065412	99	35	33,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	11:17:48	4
3065412	99	35	33,2	cyclictest	3606699	-21	kworker/u16:1+events_unbound	11:13:32	4
3065412	99	35	33,2	cyclictest	3253613	-21	kworker/u16:2+flush-8:0	09:15:48	4
3065043	2	35	24,8	sleep6	0	-21	swapper/6	07:08:16	6
3065417	99	34	32,2	cyclictest	3447768	-21	kworker/u16:1+events_unbound	10:17:44	6
3065417	99	34	32,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	09:52:28	6
3065416	99	34	32,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	11:30:16	5
3065416	99	34	32,2	cyclictest	3327390	-21	kworker/u16:4+events_unbound	09:39:49	5
3065416	99	34	32,2	cyclictest	3204959	-21	kworker/u16:3+events_unbound	09:18:29	5
3065416	99	34	32,2	cyclictest	3204959	-21	kworker/u16:3+events_unbound	09:10:56	5
3065412	99	34	32,2	cyclictest	3732509	-21	kworker/u16:4+events_unbound	12:11:44	4
3065412	99	34	32,2	cyclictest	3523880	-21	kworker/u16:4+events_unbound	10:45:41	4
3065412	99	34	32,2	cyclictest	3523880	-21	kworker/u16:4+events_unbound	10:43:40	4
3065412	99	34	32,2	cyclictest	3253613	-21	kworker/u16:2+events_unbound	09:12:28	4
3065417	99	33	31,2	cyclictest	3657235	-21	kworker/u16:3+events_unbound	11:46:08	6
3065417	99	33	31,2	cyclictest	3570711	-21	kworker/u16:0+events_unbound	10:55:45	6
3065417	99	33	31,2	cyclictest	3547953	-21	kworker/u16:1+events_unbound	10:50:28	6
3065416	99	33	31,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	10:18:00	5
3065416	99	33	31,2	cyclictest	3313134	-21	kworker/u16:0+events_unbound	09:56:24	5
3065412	99	33	31,2	cyclictest	3781760	-21	kworker/u16:3+events_unbound	12:28:01	4
3065412	99	33	31,2	cyclictest	3619621	-21	kworker/u16:2+events_unbound	12:08:40	4
3065412	99	33	31,2	cyclictest	3606699	-21	kworker/u16:1+events_unbound	11:32:45	4
3065412	99	33	31,2	cyclictest	3585670	-21	kworker/u16:5+events_unbound	11:05:45	4
3065412	99	33	31,2	cyclictest	3570711	-21	kworker/u16:0+flush-8:0	11:42:04	4
3065412	99	33	31,2	cyclictest	3447768	-21	kworker/u16:1+events_unbound	10:05:12	4
3065412	99	33	31,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	10:34:05	4
3065412	99	33	31,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	10:15:45	4
3065412	99	33	31,2	cyclictest	3387501	-21	kworker/u16:2+events_unbound	09:55:33	4
3065412	99	33	31,2	cyclictest	3325937	-21	kworker/u16:1+events_unbound	09:23:44	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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