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 Wed Jul 08, 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
2699479	2	100	0,1	sleep7	2699480	-21	sh	11:57:48	7
2042452	2	58	48,7	sleep5	0	-21	swapper/5	07:06:26	5
2042648	2	52	17,30	sleep7	0	-21	swapper/7	07:09:08	7
2598682	2	50	0,0	sleep5	0	-21	swapper/5	11:15:22	5
2796493	2	48	0,0	sleep5	0	-21	swapper/5	12:35:21	5
2042663	2	41	31,7	sleep4	0	-21	swapper/4	07:09:21	4
2043017	99	40	38,2	cyclictest	2553808	-21	kworker/u16:0+events_unbound	11:05:27	6
2043017	99	40	37,2	cyclictest	2688802	-21	kworker/u16:0+flush-8:0	12:15:08	6
2043017	99	39	36,2	cyclictest	2503024	-21	kworker/u16:3+flush-8:0	11:09:54	6
2043017	99	38	35,2	cyclictest	2317775	-21	kworker/u16:2+events_unbound	09:30:07	6
2043017	99	38	35,2	cyclictest	2246597	-21	kworker/u16:1+flush-8:0	09:20:08	6
2043017	99	37	35,2	cyclictest	2478141	-21	kworker/u16:5+events_unbound	10:52:35	6
2043017	99	37	35,2	cyclictest	2351979	-21	kworker/u16:3+events_unbound	10:24:50	6
2043017	99	37	35,2	cyclictest	2317775	-21	kworker/u16:2+events_unbound	09:28:35	6
2043007	99	37	34,2	cyclictest	2366871	-21	kworker/u16:4+events_unbound	10:04:19	4
2043007	99	37	34,2	cyclictest	2042748	-21	kworker/u16:1+flush-8:0	07:25:11	4
2043017	99	36	34,2	cyclictest	2651705	-21	kworker/u16:5+events_unbound	12:14:50	6
2043017	99	36	34,2	cyclictest	2553808	-21	kworker/u16:0+events_unbound	11:36:18	6
2043017	99	36	34,2	cyclictest	2246597	-21	kworker/u16:1+flush-8:0	09:10:22	6
2043017	99	36	33,3	cyclictest	2771588	-21	kworker/u16:1+events_unbound	12:33:02	6
2043017	99	36	33,2	cyclictest	2610985	-21	kworker/u16:3+flush-8:0	11:45:08	6
2043017	99	35	33,2	cyclictest	2688802	-21	kworker/u16:0+flush-8:0	12:04:10	6
2043017	99	35	33,2	cyclictest	2610985	-21	kworker/u16:3+events_unbound	11:50:05	6
2043007	99	35	33,2	cyclictest	2651705	-21	kworker/u16:5+events_unbound	12:36:22	4
2043020	99	34	29,4	cyclictest	2688323	-21	latency_hist	11:54:53	7
2043017	99	34	32,2	cyclictest	2651705	-21	kworker/u16:5+flush-8:0	11:41:18	6
2043017	99	34	32,2	cyclictest	2499716	-21	kworker/u16:1+flush-8:0	11:15:14	6
2043017	99	34	32,2	cyclictest	2366871	-21	kworker/u16:4+events_unbound	10:12:26	6
2043017	99	34	32,2	cyclictest	2288740	-21	kworker/u16:0+events_unbound	09:56:26	6
2043007	99	34	32,2	cyclictest	2713131	-21	kworker/u16:2+events_unbound	12:29:39	4
2043007	99	34	32,2	cyclictest	2288740	-21	kworker/u16:0+events_unbound	09:33:28	4
2043017	99	33	31,2	cyclictest	2688802	-21	kworker/u16:0+events_unbound	12:20:01	6
2043017	99	33	31,2	cyclictest	2651705	-21	kworker/u16:5+events_unbound	12:07:22	6
2043017	99	33	31,2	cyclictest	2590796	-21	kworker/u16:2+events_unbound	11:23:22	6
2043017	99	33	31,2	cyclictest	2553808	-21	kworker/u16:0+events_unbound	11:31:50	6
2043017	99	33	31,2	cyclictest	2503024	-21	kworker/u16:3+events_unbound	10:59:22	6
2043017	99	33	31,2	cyclictest	2499716	-21	kworker/u16:1+events_unbound	11:01:07	6
2043017	99	33	31,2	cyclictest	2478140	-21	kworker/u16:2+events_unbound	10:34:50	6
2043017	99	33	31,2	cyclictest	2351979	-21	kworker/u16:3+events_unbound	10:05:51	6
2043017	99	33	31,2	cyclictest	2351979	-21	kworker/u16:3+events_unbound	09:51:19	6
2043017	99	33	31,2	cyclictest	2288740	-21	kworker/u16:0+events_unbound	09:17:35	6
2043017	99	33	31,2	cyclictest	2288740	-21	kworker/u16:0+events_unbound	09:17:35	6
2043017	99	33	30,2	cyclictest	2119266	-21	kworker/u16:0+events_unbound	08:29:55	6
2043017	99	33	30,2	cyclictest	2042748	-21	kworker/u16:1+events_unbound	07:55:08	6
2043017	99	33	30,2	cyclictest	1773939	-21	kworker/u16:3+flush-8:0	07:20:10	6
2043007	99	33	31,2	cyclictest	2771588	-21	kworker/u16:1+events_unbound	12:32:45	4
2043007	99	33	31,2	cyclictest	2366871	-21	kworker/u16:4+events_unbound	09:53:20	4
2043007	99	33	31,2	cyclictest	2351979	-21	kworker/u16:3+events_unbound	09:39:34	4
2043017	99	32	30,2	cyclictest	2771588	-21	kworker/u16:1+events_unbound	12:36:06	6
2043017	99	32	30,2	cyclictest	2651705	-21	kworker/u16:5+flush-8:0	11:55:23	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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