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 Thu Jan 01, 2026 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
681327	2	57	47,7	sleep6	0	-21	swapper/6	19:06:58	6
681144	2	47	37,7	sleep5	0	-21	swapper/5	19:04:25	5
681282	2	43	9,30	sleep7	0	-21	swapper/7	19:06:19	7
681409	2	34	24,7	sleep4	0	-21	swapper/4	19:08:09	4
681736	99	32	30,2	cyclictest	1179546	-21	kworker/u16:3+events_unbound	23:26:52	6
681736	99	31	29,2	cyclictest	1257092	-21	kworker/u16:6+events_unbound	00:27:51	6
681736	99	31	29,2	cyclictest	1044978	-21	kworker/u16:2+events_unbound	22:28:44	6
681736	99	31	29,2	cyclictest	1044978	-21	kworker/u16:2+events_unbound	22:19:52	6
681736	99	31	29,2	cyclictest	1044978	-21	kworker/u16:2+events_unbound	22:19:52	6
681736	99	30	28,2	cyclictest	918236	-21	kworker/u16:3+events_unbound	21:15:52	6
681736	99	30	28,2	cyclictest	3303372	-21	kworker/u16:2+events_unbound	19:54:52	6
681736	99	30	28,2	cyclictest	1307665	-21	kworker/u16:2+events_unbound	00:37:51	6
681727	99	30	28,2	cyclictest	1122637	-21	kworker/u16:4+events_unbound	22:54:08	4
681736	99	29	27,2	cyclictest	918236	-21	kworker/u16:3+events_unbound	22:17:16	6
681736	99	29	27,2	cyclictest	879742	-21	kworker/u16:1+events_unbound	21:21:52	6
681736	99	29	27,2	cyclictest	1228090	-21	kworker/u16:3+events_unbound	23:56:52	6
681736	99	29	27,2	cyclictest	1189878	-21	kworker/u16:1+events_unbound	23:48:42	6
681736	99	29	27,2	cyclictest	1112454	-21	kworker/u16:3+events_unbound	23:02:52	6
681733	99	29	27,2	cyclictest	681514	-21	kworker/u16:1+flush-8:0	19:39:20	5
681736	99	28	26,2	cyclictest	928075	-21	kworker/u16:4+events_unbound	21:42:52	6
681736	99	28	26,2	cyclictest	1237620	-21	kworker/u16:4+events_unbound	00:30:56	6
681736	99	28	26,2	cyclictest	1112454	-21	kworker/u16:3+events_unbound	22:52:52	6
681727	99	28	25,2	cyclictest	681514	-21	kworker/u16:1+flush-8:0	19:28:57	4
681727	99	28	25,2	cyclictest	3303372	-21	kworker/u16:2+events_unbound	19:08:56	4
681736	99	27	25,2	cyclictest	986362	-21	kworker/u16:0+events_unbound	21:59:47	6
681736	99	27	25,2	cyclictest	928075	-21	kworker/u16:4+events_unbound	22:10:12	6
681736	99	27	25,2	cyclictest	928075	-21	kworker/u16:4+events_unbound	22:05:48	6
681736	99	27	25,2	cyclictest	879742	-21	kworker/u16:1+events_unbound	21:27:53	6
681736	99	27	25,2	cyclictest	811842	-21	kworker/u16:0+events_unbound	20:14:52	6
681736	99	27	25,2	cyclictest	681514	-21	kworker/u16:1+events_unbound	19:50:16	6
681736	99	27	25,2	cyclictest	1044978	-21	kworker/u16:2+events_unbound	23:42:28	6
681736	99	26	25,1	cyclictest	879742	-21	kworker/u16:1+events_unbound	21:11:24	6
681736	99	26	24,2	cyclictest	879742	-21	kworker/u16:1+flush-8:0	21:03:42	6
681736	99	26	24,2	cyclictest	753291	-21	kworker/u16:3+events_unbound	20:42:17	6
681736	99	26	24,2	cyclictest	4151265	-21	kworker/u16:0+events_unbound	19:11:17	6
681736	99	26	24,2	cyclictest	3303372	-21	kworker/u16:2+events_unbound	20:09:06	6
681736	99	26	24,2	cyclictest	1257092	-21	kworker/u16:6+events_unbound	00:17:25	6
681736	99	26	24,2	cyclictest	1247976	-21	kworker/u16:5+events_unbound	00:02:15	6
681736	99	26	23,2	cyclictest	1228090	-21	kworker/u16:3+events_unbound	00:07:00	6
681733	99	26	23,2	cyclictest	986552	-21	kworker/u16:2+flush-8:0	21:43:57	5
912770	2	25	0,1	chrt	0	-21	swapper/4	21:04:01	4
681736	99	25	23,2	cyclictest	918236	-21	kworker/u16:3+flush-8:0	21:48:37	6
681736	99	25	23,2	cyclictest	879742	-21	kworker/u16:1+events_unbound	21:30:16	6
681736	99	25	23,2	cyclictest	879742	-21	kworker/u16:1+events_unbound	20:52:17	6
681736	99	25	23,2	cyclictest	743235	-21	kworker/u16:0+events_unbound	19:35:17	6
681736	99	25	23,2	cyclictest	3303372	-21	kworker/u16:2+events_unbound	20:27:52	6
681736	99	25	23,2	cyclictest	1189878	-21	kworker/u16:1+events_unbound	23:33:39	6
681736	99	25	23,2	cyclictest	1044978	-21	kworker/u16:2+events_unbound	23:17:24	6
681727	99	25	21,3	cyclictest	1044978	-21	kworker/u16:2+events_unbound	23:04:04	4
681738	99	24	22,1	cyclictest	908529	-21	basename	21:03:42	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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