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 Tue Jan 20, 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
2380600	2	61	50,8	sleep5	0	-21	swapper/5	07:04:38	5
2380600	2	61	50,8	sleep5	0	-21	swapper/5	07:04:38	5
2380674	2	54	44,7	sleep4	0	-21	swapper/4	07:05:41	4
2380674	2	54	44,7	sleep4	0	-21	swapper/4	07:05:41	4
2381084	99	46	40,5	cyclictest	2703061	-21	latency_hist	09:42:21	7
2380659	2	44	10,30	sleep7	0	-21	swapper/7	07:05:28	7
2380659	2	44	10,30	sleep7	0	-21	swapper/7	07:05:28	7
2380619	2	42	19,7	sleep6	0	-21	swapper/6	07:04:55	6
2380619	2	42	19,7	sleep6	0	-21	swapper/6	07:04:55	6
2381079	99	39	36,2	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	10:57:21	6
2381074	99	37	35,2	cyclictest	2491129	-21	kworker/u16:0+flush-8:0	09:57:16	5
2381079	99	35	33,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:32:55	6
2381074	99	34	32,2	cyclictest	2754132	-21	kworker/u16:3+events_unbound	10:17:36	5
2381084	99	33	26,6	cyclictest	3034477	-21	latency_hist	11:57:21	7
2381079	99	32	30,2	cyclictest	2520278	-21	kworker/u16:2+flush-8:0	09:12:17	6
2381074	99	32	30,2	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	11:27:52	5
2381074	99	32	30,2	cyclictest	2520278	-21	kworker/u16:2+flush-8:0	08:52:21	5
2381071	99	32	28,3	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	11:12:52	4
2381079	99	31	29,2	cyclictest	2850676	-21	kworker/u16:0+flush-8:0	11:17:56	6
2381079	99	31	29,2	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	12:17:51	6
2381079	99	31	29,2	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	12:17:51	6
2381079	99	31	29,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	09:02:36	6
2381074	99	31	29,2	cyclictest	2692042	-21	kworker/u16:2+flush-8:0	09:58:22	5
2381071	99	31	29,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	10:18:25	4
2381084	99	30	24,5	cyclictest	3083489	-21	latency_hist	12:17:21	7
2381079	99	30	28,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:12:46	6
2381074	99	30	27,2	cyclictest	2801856	-21	kworker/u16:1+flush-8:0	10:42:28	5
2381071	99	30	28,2	cyclictest	3011261	-21	kworker/u16:0+flush-8:0	11:48:13	4
2381071	99	29	27,2	cyclictest	2887813	-21	kworker/u16:2+events_unbound	11:39:47	4
2381071	99	29	27,2	cyclictest	2887813	-21	kworker/u16:2+events_unbound	11:39:47	4
2381074	99	28	25,2	cyclictest	2491129	-21	kworker/u16:0+flush-8:0	09:27:37	5
2381071	99	28	26,2	cyclictest	2887813	-21	kworker/u16:2+flush-8:0	11:33:19	4
2381071	99	28	26,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	08:29:36	4
2381071	99	28	26,2	cyclictest	2501302	-21	kworker/u16:1+events_unbound	08:40:52	4
2653320	2	27	0,1	chrt	2653321	-21	ssh	09:21:24	7
2381079	99	26	23,2	cyclictest	2307426	-21	kworker/u16:1+flush-8:0	07:07:53	6
2381071	99	26	24,2	cyclictest	2850676	-21	kworker/u16:0+events_unbound	10:48:15	4
2381071	99	26	24,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	08:06:28	4
2381071	99	26	24,2	cyclictest	2471998	-21	kworker/u16:1+events_unbound	07:56:48	4
2381071	99	26	24,2	cyclictest	2445251	-21	kworker/u16:0+events_unbound	07:39:48	4
2381071	99	26	24,2	cyclictest	2307460	-21	kworker/u16:3+events_unbound	07:31:04	4
2381084	99	25	20,4	cyclictest	2948735	-21	latency_hist	11:22:22	7
2381074	99	25	23,2	cyclictest	2754132	-21	kworker/u16:3+flush-8:0	10:07:44	5
2381074	99	25	23,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:02:21	5
2381074	99	25	23,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:02:21	5
2381074	99	25	23,2	cyclictest	2307426	-21	kworker/u16:1+flush-8:0	07:07:41	5
2381071	99	25	23,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:38:11	4
2381071	99	25	23,2	cyclictest	2307426	-21	kworker/u16:1+events_unbound	07:14:53	4
2381071	99	25	23,2	cyclictest	2307426	-21	kworker/u16:1+events_unbound	07:08:57	4
2381079	99	24	21,2	cyclictest	2445251	-21	kworker/u16:0+events_unbound	07:42:34	6
2381074	99	24	22,2	cyclictest	3107092	-21	kworker/u16:2+flush-8:0	12:32:49	5
2381074	99	24	22,2	cyclictest	2801856	-21	kworker/u16:1+flush-8:0	10:32:51	5
2381074	99	24	22,2	cyclictest	2754132	-21	kworker/u16:3+flush-8:0	10:24:20	5
2381074	99	24	22,2	cyclictest	2578536	-21	kworker/u16:3+events_unbound	09:47:46	5
2381074	99	24	20,3	cyclictest	2491129	-21	kworker/u16:0+flush-8:0	09:47:21	5
2381071	99	24	22,2	cyclictest	3056558	-21	kworker/u16:0+flush-8:0	12:21:51	4
2381071	99	24	22,2	cyclictest	3056558	-21	kworker/u16:0+flush-8:0	12:21:51	4
2381071	99	24	22,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:12:32	4
2381071	99	24	22,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	09:01:08	4
2381071	99	24	22,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	09:01:08	4
2381071	99	24	22,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	08:08:37	4
2381071	99	24	22,2	cyclictest	2381297	-21	kworker/u16:4+events_unbound	07:50:09	4
2381071	99	24	22,2	cyclictest	2381297	-21	kworker/u16:4+events_unbound	07:36:48	4
2381074	99	23	21,2	cyclictest	3107092	-21	kworker/u16:2+events_unbound	12:27:16	5
2381074	99	23	20,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	08:52:40	5
2381071	99	23	21,2	cyclictest	2850676	-21	kworker/u16:0+events_unbound	11:08:07	4
2381071	99	23	21,2	cyclictest	2801856	-21	kworker/u16:1+events_unbound	10:22:59	4
2381071	99	23	21,2	cyclictest	2754132	-21	kworker/u16:3+flush-8:0	10:13:04	4
2381071	99	23	21,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:27:47	4
2381071	99	23	21,2	cyclictest	2578536	-21	kworker/u16:3+flush-8:0	09:18:37	4
2381071	99	23	21,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	08:24:53	4
2381071	99	23	21,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	08:15:08	4
2381071	99	23	21,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	08:15:08	4
2381071	99	23	21,2	cyclictest	2307460	-21	kworker/u16:3+events_unbound	07:45:53	4
2381071	99	23	21,2	cyclictest	2307460	-21	kworker/u16:3+events_unbound	07:26:52	4
2381071	99	23	21,2	cyclictest	2307426	-21	kworker/u16:1+events_unbound	07:18:57	4
2381084	99	22	19,2	cyclictest	0	-21	swapper/7	09:27:35	7
2381079	99	22	20,2	cyclictest	2491129	-21	kworker/u16:0+flush-8:0	09:42:46	6
2381074	99	22	20,2	cyclictest	2501302	-21	kworker/u16:1+flush-8:0	08:27:40	5
2381071	99	22	20,2	cyclictest	2578536	-21	kworker/u16:3+events_unbound	09:04:41	4
2381071	99	22	20,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	08:54:25	4
2381071	99	22	20,2	cyclictest	2491129	-21	kworker/u16:0+events_unbound	08:02:12	4
2381084	99	21	14,5	cyclictest	2549256	-21	latency_hist	08:32:22	7
2381074	99	21	19,2	cyclictest	2381297	-21	kworker/u16:4+events_unbound	07:47:45	5
2381071	99	21	19,2	cyclictest	2754132	-21	kworker/u16:3+flush-8:0	10:33:24	4
2381071	99	21	19,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	08:49:12	4
2381071	99	21	19,2	cyclictest	2520278	-21	kworker/u16:2+events_unbound	08:44:06	4
2381079	99	20	18,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:07:21	6
2381074	99	20	19,1	cyclictest	2766647	-21	kworker/u16:4+flush-8:0	11:23:10	5
2381074	99	20	18,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:17:38	5
2381074	99	20	18,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:17:38	5
2381074	99	20	18,2	cyclictest	2958474	-21	kworker/u16:1+flush-8:0	12:12:57	5
2381074	99	20	18,2	cyclictest	2578536	-21	kworker/u16:3+events_unbound	09:12:49	5
2381074	99	20	18,2	cyclictest	2307460	-21	kworker/u16:3+flush-8:0	07:23:02	5
2381074	99	20	17,2	cyclictest	2958474	-21	kworker/u16:1+events_unbound	12:07:36	5
2381071	99	20	18,2	cyclictest	2692042	-21	kworker/u16:2+flush-8:0	09:58:01	4
2381071	99	20	18,2	cyclictest	2501302	-21	kworker/u16:1+events_unbound	08:36:07	4
2381084	99	19	9,9	cyclictest	0	-21	swapper/7	09:22:38	7
2381084	99	19	15,3	cyclictest	1267	-21	snmpd	07:46:45	7
2381084	99	19	13,5	cyclictest	2471925	-21	latency_hist	07:52:22	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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