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 Wed Aug 05, 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
3563704	2	94	0,0	sleep6	0	-21	swapper/6	11:33:55	6
3621014	2	93	0,1	sleep4	0	-21	swapper/4	11:58:54	4
3254541	2	63	52,7	sleep4	0	-21	swapper/4	07:03:40	4
3254877	2	55	44,7	sleep5	0	-21	swapper/5	07:08:30	5
3254699	2	54	19,30	sleep7	0	-21	swapper/7	07:06:00	7
3255168	99	50	47,2	cyclictest	3579378	-21	kworker/u16:2+events_unbound	12:33:46	4
3255168	99	46	43,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:38:35	4
3255182	99	45	40,3	cyclictest	3273695	-21	cut	08:48:32	7
3255168	99	44	43,1	cyclictest	3259966	-21	kworker/u16:1+events_unbound	09:53:46	4
3255182	99	43	39,3	cyclictest	3619668	-21	ssh	11:58:49	7
3255173	99	41	39,2	cyclictest	3579378	-21	kworker/u16:2+events_unbound	12:34:07	5
3255168	99	41	39,2	cyclictest	3398816	-21	kworker/u16:2+events_unbound	10:48:49	4
3255168	99	41	39,2	cyclictest	3398816	-21	kworker/u16:2+events_unbound	10:48:49	4
3255168	99	41	39,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:08:59	4
3255168	99	41	39,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:08:59	4
3255168	99	41	39,1	cyclictest	3292023	-21	kworker/u16:4+events_unbound	12:14:05	4
3255182	99	40	0,38	cyclictest	3274328	-21	pluginstate	08:53:32	7
3255173	99	40	38,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	12:19:03	5
3255173	99	40	37,3	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	12:13:50	5
3255168	99	40	38,2	cyclictest	3259966	-21	kworker/u16:1+events_unbound	10:19:05	4
3255182	99	39	33,5	cyclictest	648	-21	systemd-journal	08:23:32	7
3255168	99	39	37,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	12:24:07	4
3255168	99	39	37,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	12:20:13	4
3255168	99	39	37,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:03:46	4
3255173	99	38	36,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	10:28:47	5
3255168	99	38	36,2	cyclictest	3579378	-21	kworker/u16:2+flush-8:0	12:09:03	4
3255168	99	38	36,2	cyclictest	3579378	-21	kworker/u16:2+flush-8:0	12:09:03	4
3255168	99	38	35,2	cyclictest	3329157	-21	kworker/u16:0+flush-8:0	10:43:58	4
3255173	99	37	35,2	cyclictest	3579378	-21	kworker/u16:2+events_unbound	11:44:05	5
3255173	99	37	35,2	cyclictest	3398816	-21	kworker/u16:2+events_unbound	10:49:06	5
3255173	99	37	35,2	cyclictest	3398816	-21	kworker/u16:2+events_unbound	10:49:06	5
3255173	99	37	35,2	cyclictest	3269089	-21	kworker/u16:3+events_unbound	09:54:58	5
3255173	99	37	33,4	cyclictest	3579378	-21	kworker/u16:2+flush-8:0	12:33:32	5
3255168	99	37	35,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:38:45	4
3255168	99	37	34,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:43:46	4
3255182	99	36	30,5	cyclictest	3271395	-21	latency_hist	08:33:33	7
3255173	99	36	34,2	cyclictest	3594511	-21	kworker/u16:0+events_unbound	12:03:55	5
3255173	99	36	34,2	cyclictest	3579378	-21	kworker/u16:2+events_unbound	11:53:32	5
3255173	99	36	34,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	11:04:06	5
3255168	99	36	34,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:23:54	4
3255168	99	36	34,2	cyclictest	3276952	-21	kworker/u16:0+events_unbound	09:13:19	4
3255168	99	36	33,2	cyclictest	3484152	-21	kworker/u16:3+events_unbound	11:09:04	4
3255168	99	36	33,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:58:57	4
3255168	99	36	33,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	09:58:35	4
3255182	99	35	33,1	cyclictest	3642165	-21	ssh	12:07:03	7
3255173	99	35	33,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:33:46	5
3255168	99	35	32,2	cyclictest	3259966	-21	kworker/u16:1+events_unbound	09:38:35	4
3254679	2	35	24,7	sleep6	0	-21	swapper/6	07:05:43	6
3255173	99	34	32,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:57:42	5
3255173	99	33	31,2	cyclictest	3269089	-21	kworker/u16:3+events_unbound	08:18:32	5
3255173	99	33	31,2	cyclictest	3259966	-21	kworker/u16:1+events_unbound	10:15:59	5
3255168	99	33	31,2	cyclictest	3276952	-21	kworker/u16:0+events_unbound	09:14:06	4
3255168	99	33	31,2	cyclictest	3259966	-21	kworker/u16:1+events_unbound	10:07:41	4
3255168	99	33	30,3	cyclictest	3579378	-21	kworker/u16:2+events_unbound	11:55:23	4
3255168	99	32	29,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:28:35	4
3255173	99	31	29,2	cyclictest	3594511	-21	kworker/u16:0+events_unbound	11:55:43	5
3255173	99	31	29,2	cyclictest	3532939	-21	kworker/u16:0+events_unbound	11:24:05	5
3255173	99	31	29,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	10:24:31	5
3255173	99	31	28,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:11:10	5
3255173	99	31	28,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:11:10	5
3255168	99	31	29,2	cyclictest	3579378	-21	kworker/u16:2+events_unbound	12:32:10	4
3255168	99	31	29,2	cyclictest	3484152	-21	kworker/u16:3+events_unbound	11:20:21	4
3255177	99	30	28,2	cyclictest	3329157	-21	kworker/u16:0+flush-8:0	10:58:32	6
3255173	99	30	28,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	11:14:10	5
3255168	99	30	28,2	cyclictest	3594511	-21	kworker/u16:0+events_unbound	12:07:09	4
3255182	99	29	0,27	cyclictest	3375744	-21	smartctl	10:18:47	7
3255168	99	29	27,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:34:01	4
3255168	99	29	27,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:29:18	4
3255168	99	29	27,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:29:18	4
3255168	99	29	27,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	10:17:19	4
3255168	99	29	27,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	09:52:18	4
3255168	99	29	27,2	cyclictest	3269089	-21	kworker/u16:3+events_unbound	09:26:42	4
3255182	99	28	25,2	cyclictest	3261780	-21	perf	07:28:32	7
3255182	99	28	23,4	cyclictest	3255721	-21	latency_hist	07:13:32	7
3255182	99	28	22,5	cyclictest	3655209	-21	latency_hist	12:13:32	7
3255182	99	28	22,5	cyclictest	3655209	-21	latency_hist	12:13:32	7
3255173	99	28	26,2	cyclictest	3532939	-21	kworker/u16:0+events_unbound	11:38:49	5
3255173	99	28	26,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	10:35:42	5
3255173	99	28	26,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:59:43	5
3255173	99	28	25,3	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	12:23:54	5
3255173	99	28	25,2	cyclictest	3458321	-21	kworker/u16:1+flush-8:0	11:18:42	5
3255168	99	28	26,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	10:33:38	4
3255168	99	28	26,2	cyclictest	3269089	-21	kworker/u16:3+flush-8:0	09:30:10	4
3255168	99	28	26,2	cyclictest	3269089	-21	kworker/u16:3+flush-8:0	09:30:10	4
3255182	99	27	22,4	cyclictest	3508504	-21	latency_hist	11:13:32	7
3255173	99	27	25,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:30:34	5
3255173	99	27	25,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:30:34	5
3255173	99	27	25,2	cyclictest	3458321	-21	kworker/u16:1+events_unbound	11:02:14	5
3255173	99	27	25,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	09:59:18	5
3255173	99	27	24,2	cyclictest	3594511	-21	kworker/u16:0+events_unbound	12:08:49	5
3255173	99	27	24,2	cyclictest	3594511	-21	kworker/u16:0+events_unbound	12:08:49	5
3255173	99	27	22,2	cyclictest	3398816	-21	kworker/u16:2+flush-8:0	10:48:31	5
3255168	99	27	25,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	11:49:00	4
3255168	99	27	25,2	cyclictest	3292023	-21	kworker/u16:4+events_unbound	09:48:22	4
3255173	99	26	24,2	cyclictest	3329157	-21	kworker/u16:0+events_unbound	10:07:19	5
3255173	99	26	24,2	cyclictest	3276952	-21	kworker/u16:0+events_unbound	09:22:48	5
3255173	99	26	24,2	cyclictest	3269089	-21	kworker/u16:3+events_unbound	09:49:42	5
3255173	99	26	23,2	cyclictest	3276952	-21	kworker/u16:0+events_unbound	09:13:50	5
3255168	99	26	24,2	cyclictest	3269089	-21	kworker/u16:3+events_unbound	09:34:51	4
3255168	99	26	23,2	cyclictest	3292023	-21	kworker/u16:4+flush-8:0	10:23:45	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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