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 100 highest latencies:

System rack0slot2.osadl.org (updated Mon Dec 22, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1714140	2	58	47,8	sleep4	0	-21	swapper/4	19:09:00	4
1714151	2	54	44,7	sleep6	0	-21	swapper/6	19:09:10	6
1714075	2	53	19,30	sleep7	0	-21	swapper/7	19:08:07	7
1713883	2	46	36,7	sleep5	0	-21	swapper/5	19:05:24	5
1714482	99	45	39,5	cyclictest	2056870	-21	latency_hist	22:04:21	7
1714482	99	36	1,33	cyclictest	2279771	-21	date	23:59:21	7
1714482	99	34	0,32	cyclictest	2269922	-21	latency_hist	23:54:21	7
1714478	99	33	31,2	cyclictest	1873063	-21	kworker/u16:2+flush-8:0	21:24:51	6
1714478	99	32	30,2	cyclictest	2278812	-21	kworker/u16:4+events_unbound	00:35:31	6
1714476	99	32	30,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	21:49:24	5
1714476	99	32	30,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	21:49:24	5
1714478	99	31	29,2	cyclictest	2254816	-21	kworker/u16:2+events_unbound	23:48:31	6
1714478	99	31	28,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	00:24:23	6
1714482	99	30	0,28	cyclictest	1853572	-21	latency_hist	20:19:21	7
1714482	99	30	0,28	cyclictest	1853572	-21	latency_hist	20:19:21	7
1714478	99	30	27,2	cyclictest	2056606	-21	kworker/u16:5+events_unbound	22:44:31	6
1714476	99	30	28,2	cyclictest	2056606	-21	kworker/u16:5+flush-8:0	23:25:51	5
1714478	99	29	27,2	cyclictest	1873064	-21	kworker/u16:4+flush-8:0	21:03:31	6
1714478	99	29	26,2	cyclictest	2047550	-21	kworker/u16:4+events_unbound	22:34:23	6
1714476	99	29	27,2	cyclictest	2221581	-21	kworker/u16:3+events_unbound	23:55:31	5
1714476	99	29	27,2	cyclictest	1988767	-21	kworker/u16:1+events_unbound	21:26:27	5
1714478	99	28	26,2	cyclictest	2037390	-21	kworker/u16:0+flush-8:0	22:00:11	6
1714476	99	28	26,2	cyclictest	2318183	-21	kworker/u16:1+events_unbound	00:26:51	5
1714476	99	28	26,2	cyclictest	2056606	-21	kworker/u16:5+flush-8:0	23:11:31	5
1714476	99	28	26,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	21:39:19	5
1714476	99	28	26,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	21:01:47	5
1714476	99	28	26,2	cyclictest	1815322	-21	kworker/u16:0+flush-8:0	20:17:47	5
1714476	99	28	26,2	cyclictest	1815322	-21	kworker/u16:0+flush-8:0	20:17:47	5
1714476	99	28	25,2	cyclictest	2124982	-21	kworker/u16:0+events_unbound	00:19:30	5
1714482	99	27	0,17	cyclictest	0	-21	swapper/7	21:44:44	7
1714476	99	27	25,2	cyclictest	2240824	-21	kworker/u16:1+events_unbound	23:40:09	5
1714476	99	27	25,2	cyclictest	2047550	-21	kworker/u16:4+flush-8:0	22:07:31	5
1714476	99	27	25,2	cyclictest	1834296	-21	kworker/u16:1+events_unbound	20:21:47	5
1714478	99	26	23,2	cyclictest	2337556	-21	kworker/u16:2+flush-8:0	00:29:30	6
1714476	99	26	24,2	cyclictest	2337556	-21	kworker/u16:2+flush-8:0	00:30:42	5
1714476	99	26	24,2	cyclictest	2095668	-21	kworker/u16:1+flush-8:0	22:38:55	5
1714476	99	26	24,2	cyclictest	2056606	-21	kworker/u16:5+events_unbound	23:22:55	5
1714476	99	26	24,2	cyclictest	1834296	-21	kworker/u16:1+events_unbound	20:58:12	5
1714482	99	25	19,5	cyclictest	2299062	-21	latency_hist	00:09:21	7
1714478	99	25	23,2	cyclictest	2017884	-21	kworker/u16:1+events_unbound	22:08:30	6
1714478	99	25	22,2	cyclictest	2047550	-21	kworker/u16:4+flush-8:0	22:29:22	6
1714476	99	25	23,2	cyclictest	2240824	-21	kworker/u16:1+flush-8:0	23:44:22	5
1714476	99	25	23,2	cyclictest	2124982	-21	kworker/u16:0+events_unbound	23:00:54	5
1714476	99	25	23,2	cyclictest	2047550	-21	kworker/u16:4+events_unbound	22:54:51	5
1714476	99	25	23,2	cyclictest	2037390	-21	kworker/u16:0+flush-8:0	21:55:34	5
1714476	99	25	23,2	cyclictest	1785909	-21	kworker/u16:2+events_unbound	20:11:47	5
1714478	99	24	22,2	cyclictest	2278812	-21	kworker/u16:4+events_unbound	00:05:51	6
1714476	99	24	22,2	cyclictest	240804	-21	kworker/u16:3+events_unbound	19:54:18	5
1714476	99	24	22,2	cyclictest	1979090	-21	kworker/u16:0+events_unbound	21:30:47	5
1714476	99	24	22,2	cyclictest	1815322	-21	kworker/u16:0+flush-8:0	20:25:11	5
1714476	99	24	21,2	cyclictest	240804	-21	kworker/u16:3+events_unbound	19:09:25	5
1714473	99	24	22,2	cyclictest	2124982	-21	kworker/u16:0+events_unbound	23:49:38	4
1714482	99	23	21,1	cyclictest	2308774	-21	idleruntime-cro	00:14:20	7
1714482	99	23	17,5	cyclictest	650	-21	systemd-journal	21:04:21	7
1714482	99	23	17,5	cyclictest	1766560	-21	latency_hist	19:34:22	7
1714478	99	23	21,2	cyclictest	2221581	-21	kworker/u16:3+events_unbound	23:49:49	6
1714478	99	23	21,2	cyclictest	2056606	-21	kworker/u16:5+events_unbound	22:25:30	6
1714478	99	23	21,2	cyclictest	2047550	-21	kworker/u16:4+flush-8:0	23:04:21	6
1714478	99	23	21,2	cyclictest	1950730	-21	kworker/u16:3+events_unbound	21:15:32	6
1714476	99	23	21,2	cyclictest	240804	-21	kworker/u16:3+flush-8:0	19:55:36	5
1714476	99	23	21,2	cyclictest	2278812	-21	kworker/u16:4+flush-8:0	00:34:54	5
1714476	99	23	21,2	cyclictest	2278812	-21	kworker/u16:4+flush-8:0	00:02:22	5
1714476	99	23	21,2	cyclictest	2221581	-21	kworker/u16:3+flush-8:0	00:14:19	5
1714476	99	23	21,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	23:29:41	5
1714476	99	23	21,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	23:29:41	5
1714476	99	23	21,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	22:46:36	5
1714476	99	23	21,2	cyclictest	2124982	-21	kworker/u16:0+events_unbound	23:52:06	5
1714476	99	23	21,2	cyclictest	2056606	-21	kworker/u16:5+flush-8:0	23:34:48	5
1714476	99	23	21,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	20:50:51	5
1714476	99	23	21,2	cyclictest	1873063	-21	kworker/u16:2+events_unbound	20:37:47	5
1714476	99	23	20,2	cyclictest	2124982	-21	kworker/u16:0+events_unbound	00:04:23	5
1714473	99	23	20,2	cyclictest	1795228	-21	kworker/u16:4+flush-8:0	20:04:36	4
1714482	99	22	16,5	cyclictest	650	-21	systemd-journal	19:44:22	7
1714478	99	22	20,2	cyclictest	1834296	-21	kworker/u16:1+events_unbound	20:51:47	6
1714478	99	22	20,2	cyclictest	1834296	-21	kworker/u16:1+events_unbound	20:36:15	6
1714476	99	22	20,2	cyclictest	240804	-21	kworker/u16:3+flush-8:0	19:18:44	5
1714476	99	22	20,2	cyclictest	240804	-21	kworker/u16:3+events_unbound	19:42:40	5
1714476	99	22	20,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	22:50:35	5
1714476	99	22	20,2	cyclictest	2056606	-21	kworker/u16:5+events_unbound	22:29:20	5
1714476	99	22	20,2	cyclictest	2027604	-21	kworker/u16:3+events_unbound	22:03:44	5
1714476	99	22	20,2	cyclictest	1950730	-21	kworker/u16:3+events_unbound	21:17:47	5
1714476	99	22	20,2	cyclictest	1834296	-21	kworker/u16:1+flush-8:0	20:46:48	5
1714476	99	22	20,2	cyclictest	1685667	-21	kworker/u16:1+flush-8:0	19:26:55	5
1714476	99	22	20,2	cyclictest	1685667	-21	kworker/u16:1+flush-8:0	19:26:55	5
1714476	99	22	20,2	cyclictest	1685667	-21	kworker/u16:1+events_unbound	19:35:19	5
1714476	99	22	20,2	cyclictest	1685667	-21	kworker/u16:1+events_unbound	19:24:20	5
1714473	99	22	20,2	cyclictest	1873063	-21	kworker/u16:2+flush-8:0	21:39:52	4
2066808	2	21	0,1	chrt	2066807	-21	sed	22:09:22	7
1714478	99	21	19,2	cyclictest	2318183	-21	kworker/u16:1+flush-8:0	00:20:15	6
1714478	99	21	19,2	cyclictest	1944837	-21	kworker/u16:1+events_unbound	21:06:23	6
1714478	99	21	19,2	cyclictest	1834296	-21	kworker/u16:1+events_unbound	20:56:19	6
1714476	99	21	19,2	cyclictest	2047550	-21	kworker/u16:4+events_unbound	22:15:51	5
1714476	99	21	19,2	cyclictest	1979090	-21	kworker/u16:0+events_unbound	21:44:53	5
1714476	99	21	19,2	cyclictest	1873064	-21	kworker/u16:4+flush-8:0	20:43:33	5
1714476	99	21	19,2	cyclictest	1815322	-21	kworker/u16:0+events_unbound	20:32:36	5
1714476	99	21	19,2	cyclictest	1795228	-21	kworker/u16:4+events_unbound	20:02:44	5
1714476	99	21	19,2	cyclictest	1785909	-21	kworker/u16:2+events_unbound	20:05:48	5
1714476	99	21	18,2	cyclictest	2047550	-21	kworker/u16:4+flush-8:0	22:19:22	5
1714473	99	21	19,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	22:39:36	4
1714473	99	21	19,2	cyclictest	2124982	-21	kworker/u16:0+flush-8:0	22:39:36	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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