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 Fri Apr 10, 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
2363944	2	60	49,8	sleep4	0	-21	swapper/4	06:59:09	4
2364067	2	51	41,7	sleep5	0	-21	swapper/5	07:00:55	5
2364435	99	49	43,5	cyclictest	650	-21	systemd-journal	10:07:03	7
2364435	99	49	43,5	cyclictest	650	-21	systemd-journal	10:07:03	7
2364430	99	49	47,2	cyclictest	2742928	-21	kworker/u16:1+flush-8:0	11:17:33	5
2364434	99	46	43,2	cyclictest	3081851	-21	kworker/u16:0+events_unbound	12:27:05	6
2364430	99	45	43,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:29:59	5
2364434	99	44	42,2	cyclictest	2682219	-21	kworker/u16:0+events_unbound	09:48:10	6
2364434	99	44	41,2	cyclictest	3021475	-21	kworker/u16:4+events_unbound	12:02:12	6
2364434	99	44	41,2	cyclictest	3021475	-21	kworker/u16:4+events_unbound	12:02:12	6
2364430	99	44	41,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	10:57:05	5
2364434	99	43	41,2	cyclictest	2958539	-21	kworker/u16:0+events_unbound	11:31:29	6
2364434	99	43	41,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:25:53	6
2364434	99	43	41,2	cyclictest	2609238	-21	kworker/u16:2+events_unbound	09:20:05	6
2364078	2	43	2,37	sleep7	0	-21	swapper/7	07:01:05	7
2364434	99	42	40,2	cyclictest	2958539	-21	kworker/u16:0+events_unbound	11:58:17	6
2364434	99	42	40,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:35:41	6
2364434	99	42	40,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:18:21	6
2364434	99	42	40,2	cyclictest	2656217	-21	kworker/u16:5+events_unbound	10:10:09	6
2364434	99	42	40,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:45:31	6
2364434	99	42	40,2	cyclictest	2511218	-21	kworker/u16:1+events_unbound	09:13:26	6
2364434	99	41	39,2	cyclictest	2972898	-21	kworker/u16:1+events_unbound	11:50:05	6
2364434	99	41	39,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	10:58:13	6
2364434	99	41	39,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:54:46	6
2364434	99	41	39,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:06:05	6
2364434	99	41	39,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:06:05	6
2364434	99	41	39,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:11:09	6
2364434	99	41	39,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:55:49	6
2364426	99	41	38,2	cyclictest	2815689	-21	kworker/u16:2+flush-8:0	10:41:58	4
2364002	2	41	31,7	sleep6	0	-21	swapper/6	06:59:59	6
2364434	99	40	38,2	cyclictest	3045737	-21	kworker/u16:2+events_unbound	12:07:56	6
2364434	99	40	38,2	cyclictest	2972898	-21	kworker/u16:1+events_unbound	11:44:21	6
2364434	99	40	38,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	11:36:49	6
2364434	99	40	38,2	cyclictest	2656217	-21	kworker/u16:5+events_unbound	10:16:22	6
2364434	99	40	38,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:40:34	6
2364434	99	40	38,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:25:14	6
2364434	99	40	38,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:25:14	6
2364434	99	40	38,2	cyclictest	2609238	-21	kworker/u16:2+events_unbound	09:35:45	6
2364434	99	40	38,2	cyclictest	2609238	-21	kworker/u16:2+events_unbound	09:07:05	6
2364434	99	39	38,1	cyclictest	2656217	-21	kworker/u16:5+events_unbound	10:01:11	6
2364434	99	39	37,2	cyclictest	3045737	-21	kworker/u16:2+events_unbound	12:13:22	6
2364434	99	39	37,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:40:13	6
2364434	99	39	37,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:45:33	6
2364434	99	39	37,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:45:33	6
2364434	99	39	37,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:28:22	6
2364434	99	39	36,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:22:12	6
2364430	99	39	38,1	cyclictest	3045737	-21	kworker/u16:2+events_unbound	12:08:09	5
2364430	99	39	37,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:47:05	5
2364430	99	39	36,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:17:05	5
2364426	99	39	36,2	cyclictest	2994111	-21	kworker/u16:3+flush-8:0	12:22:03	4
2364435	99	38	31,6	cyclictest	2656064	-21	pool-gnome-soft	09:24:03	7
2364435	99	38	31,6	cyclictest	2656064	-21	pool-gnome-soft	09:24:03	7
2364434	99	38	36,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:19:16	6
2364434	99	38	36,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	11:16:53	6
2364434	99	38	36,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:25:33	6
2364434	99	38	36,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:25:33	6
2364434	99	38	36,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:20:56	6
2364434	99	38	36,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:47:42	6
2364430	99	38	36,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:09:02	5
2364434	99	37	35,2	cyclictest	2540192	-21	kworker/u16:0+events_unbound	09:06:38	6
2364434	99	36	34,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	11:41:29	6
2364434	99	36	34,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:29:18	6
2364430	99	36	34,2	cyclictest	2815689	-21	kworker/u16:2+events_unbound	11:09:02	5
2364430	99	36	34,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:17:01	5
2364435	99	35	29,4	cyclictest	2803403	-21	latency_hist	10:27:03	7
2364434	99	35	32,2	cyclictest	2345098	-21	kworker/u16:4+events_unbound	07:22:05	6
2364430	99	35	33,2	cyclictest	2609238	-21	kworker/u16:2+flush-8:0	09:17:03	5
2364434	99	34	32,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:04:50	6
2364434	99	34	31,2	cyclictest	2994111	-21	kworker/u16:3+events_unbound	11:52:06	6
2364430	99	34	32,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:30:14	5
2364430	99	33	31,2	cyclictest	3021475	-21	kworker/u16:4+events_unbound	11:57:28	5
2364430	99	33	31,2	cyclictest	2994111	-21	kworker/u16:3+events_unbound	11:42:33	5
2364430	99	33	31,2	cyclictest	2742928	-21	kworker/u16:1+events_unbound	10:55:02	5
2364430	99	33	31,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:47:05	5
2364426	99	33	30,2	cyclictest	2425542	-21	kworker/u16:2+events_unbound	07:37:19	4
2364430	99	32	30,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:26:53	5
2364430	99	32	30,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:06:06	5
2364430	99	32	30,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:31:54	5
2364430	99	32	30,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:33:09	5
2364430	99	32	30,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:24:31	5
2364430	99	32	30,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:24:31	5
2364426	99	32	30,2	cyclictest	2958539	-21	kworker/u16:0+flush-8:0	11:37:21	4
2364434	99	31	29,2	cyclictest	2511218	-21	kworker/u16:1+events_unbound	08:28:18	6
2364434	99	31	29,2	cyclictest	2425542	-21	kworker/u16:2+flush-8:0	08:02:32	6
2364430	99	31	29,2	cyclictest	3045495	-21	kworker/u16:1+events_unbound	12:16:02	5
2364430	99	31	29,2	cyclictest	2682219	-21	kworker/u16:0+events_unbound	09:43:19	5
2364430	99	31	29,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	10:20:01	5
2364430	99	31	29,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	09:38:45	5
2364430	99	31	29,2	cyclictest	2587555	-21	kworker/u16:3+events_unbound	09:03:19	5
2364430	99	31	28,3	cyclictest	2445627	-21	kworker/u16:1+flush-8:0	07:42:29	5
2364430	99	31	28,2	cyclictest	2958539	-21	kworker/u16:0+events_unbound	11:37:05	5
2364426	99	31	28,3	cyclictest	2815689	-21	kworker/u16:2+flush-8:0	11:07:26	4
2364434	99	30	28,2	cyclictest	2425542	-21	kworker/u16:2+events_unbound	08:42:01	6
2364434	99	30	28,2	cyclictest	2425542	-21	kworker/u16:2+events_unbound	08:16:17	6
2364430	99	30	28,2	cyclictest	2742928	-21	kworker/u16:1+flush-8:0	10:44:41	5
2364430	99	30	28,2	cyclictest	2742928	-21	kworker/u16:1+flush-8:0	10:44:41	5
2364430	99	30	28,2	cyclictest	2682219	-21	kworker/u16:0+events_unbound	09:58:41	5
2364430	99	30	28,2	cyclictest	2682219	-21	kworker/u16:0+events_unbound	09:53:50	5
2364430	99	30	28,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:24:46	5
2364430	99	30	28,2	cyclictest	2656216	-21	kworker/u16:4+events_unbound	11:24:46	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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