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 Sun Jan 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
2550592	2	58	47,7	sleep4	0	-21	swapper/4	07:04:01	4
2550768	2	53	20,29	sleep7	0	-21	swapper/7	07:06:29	7
2550869	2	46	35,8	sleep5	0	-21	swapper/5	07:07:55	5
2551163	99	45	43,2	cyclictest	2531803	-21	kworker/u16:4+flush-8:0	07:58:00	5
2551163	99	42	40,2	cyclictest	2958656	-21	kworker/u16:2+events_unbound	10:36:30	5
2551163	99	41	39,2	cyclictest	3217289	-21	kworker/u16:1+events_unbound	12:16:23	5
2551163	99	41	39,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:02:37	5
2551163	99	41	39,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:02:37	5
2551163	99	41	39,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	11:17:59	5
2551173	99	40	38,1	cyclictest	2788084	-21	diskmemload	11:34:46	7
2551163	99	40	38,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:31:13	5
2551163	99	40	38,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:11:38	5
2551163	99	40	38,2	cyclictest	3182640	-21	kworker/u16:2+events_unbound	11:57:51	5
2551163	99	40	38,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	10:22:31	5
2551163	99	40	38,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	10:06:30	5
2551163	99	40	38,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:32:10	5
2551163	99	40	37,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:25:14	5
2551163	99	39	37,2	cyclictest	3182640	-21	kworker/u16:2+events_unbound	11:50:30	5
2551163	99	39	37,2	cyclictest	3169740	-21	kworker/u16:1+events_unbound	11:46:23	5
2551163	99	39	37,2	cyclictest	2958656	-21	kworker/u16:2+events_unbound	10:17:46	5
2551163	99	39	37,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	11:30:47	5
2551163	99	39	37,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	11:27:18	5
2551163	99	39	37,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	10:00:30	5
2551163	99	39	37,2	cyclictest	2739908	-21	kworker/u16:2+flush-8:0	09:50:54	5
2551173	99	38	0,36	cyclictest	3096421	-21	taskset	11:12:41	7
2551163	99	38	36,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	10:25:41	5
2551163	99	38	36,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	10:11:07	5
2551163	99	38	36,2	cyclictest	2748294	-21	kworker/u16:3+flush-8:0	09:17:07	5
2551163	99	38	36,2	cyclictest	2748294	-21	kworker/u16:3+flush-8:0	09:17:07	5
2551163	99	38	36,2	cyclictest	2739908	-21	kworker/u16:2+flush-8:0	09:22:34	5
2551163	99	38	36,2	cyclictest	2739908	-21	kworker/u16:2+events_unbound	09:40:59	5
2551163	99	38	35,2	cyclictest	2615069	-21	kworker/u16:2+events_unbound	08:28:02	5
2551163	99	38	35,2	cyclictest	2615069	-21	kworker/u16:2+events_unbound	08:28:02	5
2551168	99	37	35,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	10:15:45	6
2551163	99	37	35,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:04:14	5
2551163	99	37	35,2	cyclictest	3182640	-21	kworker/u16:2+events_unbound	12:24:05	5
2551163	99	37	35,2	cyclictest	3057203	-21	kworker/u16:3+events_unbound	11:07:14	5
2551163	99	37	35,2	cyclictest	2936485	-21	kworker/u16:0+flush-8:0	10:42:26	5
2551163	99	37	35,2	cyclictest	2936485	-21	kworker/u16:0+flush-8:0	10:42:26	5
2551163	99	37	35,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	10:30:01	5
2551163	99	37	35,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	11:37:38	5
2551163	99	37	35,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	09:44:07	5
2551173	99	36	35,0	cyclictest	0	-21	swapper/7	11:58:58	7
2551173	99	36	35,0	cyclictest	0	-21	swapper/7	11:58:58	7
2551163	99	36	34,2	cyclictest	3217289	-21	kworker/u16:1+events_unbound	12:35:01	5
2551163	99	36	34,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	10:47:05	5
2551163	99	36	34,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	11:20:38	5
2551163	99	36	34,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	11:20:38	5
2551163	99	36	34,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	10:57:14	5
2551173	99	35	34,0	cyclictest	0	-21	swapper/7	12:30:14	7
2551168	99	35	33,2	cyclictest	2936485	-21	kworker/u16:0+events_unbound	10:26:10	6
2551168	99	35	33,2	cyclictest	2797952	-21	kworker/u16:0+events_unbound	09:12:57	6
2551168	99	35	32,2	cyclictest	3217289	-21	kworker/u16:1+events_unbound	12:13:37	6
2551163	99	35	33,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	11:41:26	5
2551163	99	35	33,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:57:46	5
2551163	99	35	33,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:57:46	5
2551163	99	35	33,2	cyclictest	2797952	-21	kworker/u16:0+events_unbound	09:11:54	5
2550644	2	35	25,7	sleep6	0	-21	swapper/6	07:04:43	6
2551168	99	34	32,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	11:33:49	6
2551168	99	34	32,2	cyclictest	2583310	-21	kworker/u16:5+events_unbound	08:02:30	6
2551163	99	34	32,2	cyclictest	3207043	-21	kworker/u16:0+events_unbound	12:21:26	5
2551163	99	34	32,2	cyclictest	3094192	-21	kworker/u16:1+events_unbound	11:12:31	5
2551163	99	34	32,2	cyclictest	3057165	-21	kworker/u16:1+flush-8:0	11:01:54	5
2551163	99	34	32,2	cyclictest	2810309	-21	kworker/u16:1+flush-8:0	09:35:22	5
2551173	99	33	32,1	cyclictest	3084152	-21	ssh	11:07:50	7
2551168	99	33	31,2	cyclictest	2876166	-21	kworker/u16:4+events_unbound	10:57:32	6
2551158	99	33	31,2	cyclictest	2822709	-21	kworker/u16:0+events_unbound	09:38:19	4
2551173	99	32	31,0	cyclictest	0	-21	swapper/7	12:11:42	7
2551173	99	32	31,0	cyclictest	0	-21	swapper/7	12:05:33	7
2551173	99	32	31,0	cyclictest	0	-21	swapper/7	11:20:18	7
2551173	99	32	31,0	cyclictest	0	-21	swapper/7	11:20:18	7
2551173	99	32	29,2	cyclictest	3144403	-21	ssh	11:30:22	7
2551173	99	32	29,2	cyclictest	2788084	-21	diskmemload	11:02:27	7
2551168	99	32	30,2	cyclictest	3072299	-21	kworker/u16:2+events_unbound	11:07:57	6
2551168	99	32	30,2	cyclictest	3057203	-21	kworker/u16:3+events_unbound	11:56:12	6
2551168	99	32	30,2	cyclictest	2822709	-21	kworker/u16:0+events_unbound	09:26:36	6
2551168	99	32	30,2	cyclictest	2810309	-21	kworker/u16:1+flush-8:0	09:53:48	6
2551168	99	32	30,2	cyclictest	2810309	-21	kworker/u16:1+flush-8:0	09:53:48	6
2551168	99	32	30,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:59:53	6
2551168	99	32	30,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:48:33	6
2551168	99	32	30,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	09:32:35	6
2551163	99	32	30,2	cyclictest	2958656	-21	kworker/u16:2+events_unbound	10:51:13	5
2551158	99	32	30,2	cyclictest	2739908	-21	kworker/u16:2+events_unbound	09:50:14	4
2551173	99	31	31,0	cyclictest	0	-21	swapper/7	10:57:50	7
2551168	99	31	29,2	cyclictest	3217289	-21	kworker/u16:1+events_unbound	12:34:20	6
2551168	99	31	29,2	cyclictest	3182640	-21	kworker/u16:2+events_unbound	12:19:13	6
2551168	99	31	29,2	cyclictest	3057203	-21	kworker/u16:3+events_unbound	11:43:55	6
2551168	99	31	29,2	cyclictest	2739908	-21	kworker/u16:2+events_unbound	09:40:44	6
2551168	99	31	29,2	cyclictest	2681311	-21	kworker/u16:1+events_unbound	08:15:14	6
2551168	99	31	29,2	cyclictest	2615069	-21	kworker/u16:2+events_unbound	08:25:39	6
2551173	99	30	29,0	cyclictest	0	-21	swapper/7	10:13:59	7
2551173	99	30	29,0	cyclictest	0	-21	swapper/7	09:30:34	7
2551168	99	30	28,2	cyclictest	3182640	-21	kworker/u16:2+events_unbound	11:49:17	6
2551168	99	30	28,2	cyclictest	2958656	-21	kworker/u16:2+events_unbound	10:43:34	6
2551168	99	30	28,2	cyclictest	2810309	-21	kworker/u16:1+events_unbound	10:05:51	6
2551168	99	30	28,2	cyclictest	2551446	-21	kworker/u16:2+events_unbound	07:10:27	6
2551163	99	30	28,2	cyclictest	2615069	-21	kworker/u16:2+events_unbound	08:21:11	5
2551158	99	30	28,2	cyclictest	3057203	-21	kworker/u16:3+flush-8:0	10:59:46	4
2551158	99	30	28,2	cyclictest	2810309	-21	kworker/u16:1+flush-8:0	10:09:35	4
2551158	99	30	28,2	cyclictest	2739908	-21	kworker/u16:2+events_unbound	08:45:57	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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