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 01, 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
1231433	2	99	0,1	sleep4	0	-21	swapper/4	09:39:25	4
912309	2	75	64,7	sleep4	0	-21	swapper/4	07:08:22	4
912234	2	62	52,7	sleep5	0	-21	swapper/5	07:07:19	5
912635	99	53	51,2	cyclictest	1285579	-21	kworker/u16:3+flush-8:0	10:21:30	5
912635	99	45	40,4	cyclictest	1196521	-21	kworker/u16:0+flush-8:0	09:39:03	5
912635	99	41	38,2	cyclictest	984439	-21	kworker/u16:0+flush-8:0	09:09:34	5
903058	2	40	3,31	sleep7	0	-21	swapper/7	07:04:08	7
6414	89	39	0,32	rtkit-daemon	0	-21	swapper/6	07:04:05	6
912639	99	37	35,2	cyclictest	1359748	-21	kworker/u16:0+events_unbound	11:48:57	6
912639	99	37	35,2	cyclictest	1285579	-21	kworker/u16:3+events_unbound	10:17:02	6
912640	99	36	31,4	cyclictest	1618191	-21	latency_hist	12:19:03	7
912639	99	36	34,2	cyclictest	1319957	-21	kworker/u16:1+events_unbound	10:49:29	6
912639	99	35	33,2	cyclictest	936192	-21	kworker/u16:1+flush-8:0	09:11:33	6
912639	99	35	33,2	cyclictest	1442584	-21	kworker/u16:3+events_unbound	12:06:25	6
912639	99	35	33,2	cyclictest	1442584	-21	kworker/u16:3+events_unbound	11:59:07	6
912639	99	35	33,2	cyclictest	1320830	-21	kworker/u16:5+events_unbound	10:37:49	6
912639	99	34	32,2	cyclictest	984439	-21	kworker/u16:0+events_unbound	09:16:37	6
912639	99	34	32,2	cyclictest	936192	-21	kworker/u16:1+flush-8:0	10:04:32	6
912639	99	34	32,2	cyclictest	1482877	-21	kworker/u16:2+events_unbound	12:28:18	6
912639	99	34	32,2	cyclictest	1285579	-21	kworker/u16:3+events_unbound	10:30:41	6
912639	99	34	32,2	cyclictest	1196521	-21	kworker/u16:0+events_unbound	09:35:46	6
912635	99	34	31,3	cyclictest	873709	-21	kworker/u16:2+flush-8:0	07:34:29	5
912640	99	33	32,0	cyclictest	0	-21	swapper/7	09:34:05	7
912639	99	33	31,2	cyclictest	1544784	-21	kworker/u16:1+events_unbound	12:22:44	6
912639	99	33	31,2	cyclictest	1442584	-21	kworker/u16:3+events_unbound	11:56:33	6
912639	99	33	31,2	cyclictest	1442584	-21	kworker/u16:3+events_unbound	11:40:04	6
912639	99	33	31,2	cyclictest	1285579	-21	kworker/u16:3+flush-8:0	10:13:40	6
912639	99	33	31,2	cyclictest	1196521	-21	kworker/u16:0+events_unbound	09:47:10	6
912639	99	33	31,2	cyclictest	1174290	-21	kworker/u16:5+events_unbound	09:57:53	6
912633	99	33	31,2	cyclictest	936192	-21	kworker/u16:1+flush-8:0	09:14:17	4
912633	99	33	31,2	cyclictest	1139662	-21	kworker/u16:3+flush-8:0	09:09:04	4
912639	99	32	30,2	cyclictest	1544784	-21	kworker/u16:1+events_unbound	11:52:42	6
912639	99	32	30,2	cyclictest	1482877	-21	kworker/u16:2+events_unbound	12:17:49	6
912633	99	32	29,2	cyclictest	1319957	-21	kworker/u16:1+flush-8:0	10:26:36	4
912640	99	31	29,1	cyclictest	1517226	-21	ssh	11:34:32	7
912639	99	31	29,2	cyclictest	936192	-21	kworker/u16:1+events_unbound	09:33:33	6
912639	99	31	29,2	cyclictest	828327	-21	kworker/u16:4+flush-8:0	07:19:29	6
912639	99	31	29,2	cyclictest	1544784	-21	kworker/u16:1+events_unbound	12:11:20	6
912639	99	31	29,2	cyclictest	1394203	-21	kworker/u16:2+events_unbound	10:54:04	6
912639	99	31	29,2	cyclictest	1320830	-21	kworker/u16:5+events_unbound	10:39:04	6
912639	99	31	29,2	cyclictest	1319957	-21	kworker/u16:1+flush-8:0	10:44:34	6
912639	99	31	29,2	cyclictest	1319957	-21	kworker/u16:1+flush-8:0	10:44:34	6
912639	99	31	29,2	cyclictest	1196521	-21	kworker/u16:0+events_unbound	09:53:06	6
912640	99	30	29,0	cyclictest	0	-21	swapper/7	12:29:05	7
912640	99	30	24,5	cyclictest	1310106	-21	latency_hist	10:14:03	7
912639	99	30	28,2	cyclictest	1319957	-21	kworker/u16:1+flush-8:0	11:04:36	6
912639	99	30	28,2	cyclictest	1285579	-21	kworker/u16:3+events_unbound	10:27:06	6
912639	99	30	27,2	cyclictest	936192	-21	kworker/u16:1+events_unbound	09:59:08	6
912635	99	30	28,2	cyclictest	1544784	-21	kworker/u16:1+flush-8:0	12:34:28	5
912633	99	30	29,1	cyclictest	1482877	-21	kworker/u16:2+events_unbound	12:30:17	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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