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 Fri May 08, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2904723	2	98	0,1	sleep7	2904722	-21	cut	21:38:52	7
3271903	2	65	0,1	sleep6	0	-21	swapper/6	00:10:13	6
2590671	99	49	47,2	cyclictest	3163135	-21	kworker/u16:2+events_unbound	23:28:55	6
3149741	2	46	0,0	sleep6	0	-21	swapper/6	23:19:00	6
2590671	99	46	43,2	cyclictest	3028739	-21	kworker/u16:1+flush-8:0	23:03:43	6
2590671	99	46	43,2	cyclictest	2632810	-21	kworker/u16:2+events_unbound	19:53:55	6
2590177	2	46	36,7	sleep5	0	-21	swapper/5	19:05:54	5
2590671	99	45	43,2	cyclictest	3285829	-21	kworker/u16:1+events_unbound	00:33:56	6
2590673	99	44	43,0	cyclictest	0	-21	swapper/7	20:18:42	7
2590671	99	44	42,2	cyclictest	2885657	-21	kworker/u16:2+events_unbound	21:44:00	6
2590671	99	44	42,2	cyclictest	2709407	-21	kworker/u16:1+flush-8:0	20:43:57	6
2590291	2	43	33,7	sleep4	0	-21	swapper/4	19:07:29	4
2590671	99	42	36,6	cyclictest	3163135	-21	kworker/u16:2+events_unbound	00:29:34	6
2590671	99	40	38,2	cyclictest	3308074	-21	kworker/u16:0+events_unbound	00:27:58	6
2590671	99	40	38,2	cyclictest	3163135	-21	kworker/u16:2+events_unbound	23:50:11	6
2590671	99	40	38,2	cyclictest	3163135	-21	kworker/u16:2+events_unbound	23:43:44	6
2590671	99	40	38,2	cyclictest	3149262	-21	kworker/u16:0+events_unbound	23:37:15	6
2590671	99	39	37,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:51:34	6
2590332	2	39	5,29	sleep7	0	-21	swapper/7	19:08:04	7
2590673	99	38	36,1	cyclictest	0	-21	swapper/7	20:33:43	7
2590673	99	38	35,2	cyclictest	3295099	-21	smartctl	00:19:01	7
2590673	99	38	35,2	cyclictest	2749165	-21	perl	20:28:42	7
2590671	99	38	37,1	cyclictest	2859899	-21	kworker/u16:0+events_unbound	21:23:53	6
2590671	99	38	36,2	cyclictest	3176652	-21	kworker/u16:3+events_unbound	23:40:15	6
2590671	99	38	36,2	cyclictest	3176652	-21	kworker/u16:3+events_unbound	00:08:14	6
2590671	99	38	36,2	cyclictest	3163135	-21	kworker/u16:2+events_unbound	23:28:02	6
2590673	99	37	36,0	cyclictest	0	-21	swapper/7	00:23:42	7
2590671	99	37	35,2	cyclictest	3176652	-21	kworker/u16:3+events_unbound	00:18:51	6
2590671	99	37	35,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:36:11	6
2590671	99	37	35,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:04:35	6
2590671	99	37	35,2	cyclictest	2885657	-21	kworker/u16:2+events_unbound	22:26:54	6
2590671	99	36	34,2	cyclictest	3237764	-21	kworker/u16:4+events_unbound	00:02:01	6
2590671	99	36	34,2	cyclictest	3115975	-21	kworker/u16:4+events_unbound	23:16:42	6
2590671	99	36	34,2	cyclictest	3115975	-21	kworker/u16:4+events_unbound	23:11:59	6
2590671	99	36	34,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:46:42	6
2590671	99	36	34,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:21:02	6
2590671	99	36	34,2	cyclictest	2946610	-21	kworker/u16:0+events_unbound	22:16:58	6
2590671	99	36	34,2	cyclictest	2885657	-21	kworker/u16:2+events_unbound	21:52:07	6
2590671	99	36	34,2	cyclictest	2825011	-21	kworker/u16:2+events_unbound	21:19:01	6
2590673	99	35	34,0	cyclictest	0	-21	swapper/7	23:38:43	7
2590673	99	35	32,2	cyclictest	2955189	-21	ntpq	21:58:55	7
2590671	99	35	33,2	cyclictest	2872348	-21	kworker/u16:3+events_unbound	21:33:19	6
2590671	99	35	33,2	cyclictest	2872348	-21	kworker/u16:3+events_unbound	21:33:19	6
2590671	99	35	33,2	cyclictest	2709407	-21	kworker/u16:1+events_unbound	20:53:27	6
2590671	99	35	33,2	cyclictest	2709407	-21	kworker/u16:1+events_unbound	20:53:27	6
2590671	99	35	33,2	cyclictest	2690838	-21	kworker/u16:3+events_unbound	19:58:54	6
2590671	99	35	33,2	cyclictest	2632810	-21	kworker/u16:2+flush-8:0	19:38:45	6
2590671	99	35	32,2	cyclictest	2690838	-21	kworker/u16:3+flush-8:0	20:23:44	6
2590660	99	35	32,2	cyclictest	3163135	-21	kworker/u16:2+flush-8:0	23:28:51	4
2590673	99	34	31,2	cyclictest	3252910	-21	kthreadcore	00:03:46	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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