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 May 11, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
904231	2	41	4,31	sleep7	0	-21	swapper/7	07:04:37	7
904458	2	40	30,7	sleep4	0	-21	swapper/4	07:07:47	4
904249	2	39	29,7	sleep5	0	-21	swapper/5	07:04:51	5
904808	99	38	37,0	cyclictest	0	-21	swapper/7	07:13:40	7
904808	99	38	34,3	cyclictest	1420104	-21	fwupd	07:59:19	7
904799	99	38	36,2	cyclictest	1261176	-21	kworker/u16:2+events_unbound	10:08:29	5
904808	99	37	0,35	cyclictest	827	-21	dbus-daemon	09:43:13	7
904798	99	37	35,2	cyclictest	885050	-21	kworker/u16:0+events_unbound	07:28:29	4
904798	99	37	35,2	cyclictest	1081744	-21	kworker/u16:1+flush-8:0	09:38:40	4
904808	99	36	32,2	cyclictest	1227479	-21	irqstats	09:43:30	7
904808	99	36	32,2	cyclictest	1227479	-21	irqstats	09:43:30	7
904798	99	35	33,2	cyclictest	1141925	-21	kworker/u16:2+events_unbound	09:18:29	4
904799	99	34	32,2	cyclictest	1120331	-21	kworker/u16:0+events_unbound	09:08:29	5
904808	99	31	28,2	cyclictest	1332734	-21	ssh	10:23:36	7
904799	99	31	29,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:51:52	5
904799	99	31	29,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:33:52	5
1163733	2	31	0,0	chrt	1163731	-21	ssh	09:17:05	7
904808	99	30	29,0	cyclictest	0	-21	swapper/7	11:28:40	7
904808	99	30	28,1	cyclictest	1260432	-21	ssh	09:54:34	7
904808	99	29	28,0	cyclictest	0	-21	swapper/7	12:03:36	7
904798	99	29	27,2	cyclictest	1419592	-21	kworker/u16:3+events_unbound	11:03:30	4
904799	99	28	26,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	07:55:28	5
904799	99	28	26,2	cyclictest	1188422	-21	kworker/u16:3+flush-8:0	10:38:41	5
904798	99	28	26,2	cyclictest	1566906	-21	kworker/u16:0+events_unbound	12:18:28	4
904798	99	28	25,3	cyclictest	1188422	-21	kworker/u16:3+events_unbound	09:33:36	4
904375	2	28	18,7	sleep6	0	-21	swapper/6	07:06:37	6
904808	99	27	24,2	cyclictest	1590287	-21	ssh	12:08:36	7
904808	99	27	22,3	cyclictest	956767	-21	latency_hist	07:33:14	7
904799	99	27	25,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:06:32	5
904799	99	27	25,2	cyclictest	1130342	-21	kworker/u16:3+events_unbound	09:08:13	5
904804	99	26	24,2	cyclictest	1261176	-21	kworker/u16:2+events_unbound	11:13:30	6
904799	99	26	24,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	07:35:20	5
904799	99	26	24,2	cyclictest	914092	-21	kworker/u16:2+flush-8:0	07:21:20	5
904799	99	26	24,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:19:45	5
904799	99	26	24,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:19:45	5
904799	99	26	24,2	cyclictest	885050	-21	kworker/u16:0+events_unbound	07:49:53	5
904799	99	26	23,2	cyclictest	1261176	-21	kworker/u16:2+events_unbound	11:12:06	5
904799	99	26	23,2	cyclictest	1261176	-21	kworker/u16:2+events_unbound	11:12:06	5
904798	99	26	24,2	cyclictest	914092	-21	kworker/u16:2+flush-8:0	07:23:37	4
904798	99	26	24,2	cyclictest	1188422	-21	kworker/u16:3+events_unbound	10:18:39	4
904804	99	25	23,2	cyclictest	914092	-21	kworker/u16:2+flush-8:0	07:28:14	6
904799	99	25	23,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:12:45	5
904799	99	25	23,2	cyclictest	885050	-21	kworker/u16:0+events_unbound	07:32:57	5
904798	99	25	23,2	cyclictest	1520568	-21	kworker/u16:1+flush-8:0	12:23:38	4
904798	99	25	23,2	cyclictest	1033643	-21	kworker/u16:0+flush-8:0	08:23:28	4
904804	99	24	21,3	cyclictest	1081744	-21	kworker/u16:1+events_unbound	09:38:37	6
904799	99	24	22,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:44:52	5
904799	99	24	22,2	cyclictest	885050	-21	kworker/u16:0+flush-8:0	07:08:28	5
904799	99	24	22,2	cyclictest	1566906	-21	kworker/u16:0+events_unbound	12:31:38	5
904798	99	24	22,2	cyclictest	1348845	-21	kworker/u16:4+events_unbound	10:48:09	4
904808	99	23	22,0	cyclictest	0	-21	swapper/7	11:33:30	7
904808	99	23	18,4	cyclictest	1471091	-21	latency_hist	11:23:14	7
904808	99	23	17,5	cyclictest	635	-21	systemd-journal	10:08:14	7
904808	99	23	0,21	cyclictest	995227	-21	latency_hist	07:53:14	7
904799	99	23	21,2	cyclictest	975953	-21	kworker/u16:1+events_unbound	07:44:00	5
904799	99	23	21,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:41:47	5
904799	99	23	21,2	cyclictest	1482680	-21	kworker/u16:2+events_unbound	11:31:28	5
904799	99	23	21,2	cyclictest	1261176	-21	kworker/u16:2+flush-8:0	10:43:40	5
904799	99	23	21,2	cyclictest	1004536	-21	kworker/u16:1+events_unbound	08:02:36	5
904798	99	23	21,2	cyclictest	1419592	-21	kworker/u16:3+events_unbound	11:08:42	4
904798	99	23	21,2	cyclictest	1419592	-21	kworker/u16:3+events_unbound	11:08:42	4
904808	99	22	17,4	cyclictest	1373027	-21	latency_hist	10:43:14	7
904804	99	22	21,1	cyclictest	1470136	-21	kworker/u16:0+events_unbound	11:33:12	6
904804	99	22	20,2	cyclictest	885050	-21	kworker/u16:0+events_unbound	07:38:29	6
904799	99	22	20,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	07:39:08	5
904799	99	22	20,2	cyclictest	885050	-21	kworker/u16:0+events_unbound	07:18:00	5
904799	99	22	20,2	cyclictest	1569249	-21	kworker/u16:5+flush-8:0	12:25:38	5
904799	99	22	20,2	cyclictest	1395180	-21	kworker/u16:1+events_unbound	10:51:07	5
904799	99	22	20,2	cyclictest	1081744	-21	kworker/u16:1+events_unbound	10:24:21	5
904799	99	22	20,2	cyclictest	1081744	-21	kworker/u16:1+events_unbound	09:14:31	5
904798	99	22	20,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:33:40	4
904798	99	22	20,2	cyclictest	1395180	-21	kworker/u16:1+events_unbound	10:58:38	4
904798	99	22	20,2	cyclictest	1130342	-21	kworker/u16:3+events_unbound	09:03:36	4
904808	99	21	20,0	cyclictest	0	-21	swapper/7	10:50:24	7
904804	99	21	19,2	cyclictest	1261176	-21	kworker/u16:2+events_unbound	10:53:41	6
904804	99	21	17,3	cyclictest	1261176	-21	kworker/u16:2+flush-8:0	09:58:27	6
904799	99	21	19,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:55:33	5
904799	99	21	19,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	07:25:26	5
904799	99	21	19,2	cyclictest	1482680	-21	kworker/u16:2+events_unbound	11:48:27	5
904799	99	21	19,2	cyclictest	1482680	-21	kworker/u16:2+events_unbound	11:48:27	5
904799	99	21	19,2	cyclictest	1081744	-21	kworker/u16:1+events_unbound	09:23:40	5
904798	99	21	19,2	cyclictest	937773	-21	kworker/u16:4+flush-8:0	08:38:38	4
904798	99	21	19,2	cyclictest	937773	-21	kworker/u16:4+events_unbound	08:53:28	4
904798	99	21	19,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:13:38	4
904798	99	21	19,2	cyclictest	1495671	-21	kworker/u16:4+flush-8:0	11:43:42	4
904798	99	21	19,2	cyclictest	1482680	-21	kworker/u16:2+events_unbound	11:35:39	4
904798	99	21	19,2	cyclictest	1188422	-21	kworker/u16:3+flush-8:0	09:28:43	4
904798	99	21	19,2	cyclictest	1033643	-21	kworker/u16:0+events_unbound	08:28:39	4
904808	99	20	19,0	cyclictest	0	-21	swapper/7	10:32:33	7
904808	99	20	19,0	cyclictest	0	-21	swapper/7	08:28:29	7
904808	99	20	19,0	cyclictest	0	-21	swapper/7	07:53:32	7
904804	99	20	18,2	cyclictest	1120331	-21	kworker/u16:0+flush-8:0	09:33:42	6
904799	99	20	18,2	cyclictest	914092	-21	kworker/u16:2+events_unbound	08:15:20	5
904799	99	20	18,2	cyclictest	1520568	-21	kworker/u16:1+events_unbound	11:47:57	5
904799	99	20	18,2	cyclictest	1188422	-21	kworker/u16:3+flush-8:0	10:19:42	5
904798	99	20	18,2	cyclictest	851168	-21	kworker/u16:3+events_unbound	07:13:27	4
904798	99	20	18,2	cyclictest	1520568	-21	kworker/u16:1+events_unbound	12:03:26	4
904798	99	20	18,2	cyclictest	1130342	-21	kworker/u16:3+events_unbound	09:13:28	4
904798	99	20	18,2	cyclictest	1081744	-21	kworker/u16:1+events_unbound	09:44:56	4
904798	99	20	18,2	cyclictest	1081744	-21	kworker/u16:1+events_unbound	09:44:56	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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