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 Jul 12, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
607524	2	71	61,7	sleep4	0	-21	swapper/4	19:08:26	4
607524	2	71	61,7	sleep4	0	-21	swapper/4	19:08:26	4
607602	2	57	23,29	sleep7	0	-21	swapper/7	19:09:33	7
607602	2	57	23,29	sleep7	0	-21	swapper/7	19:09:33	7
1147656	2	56	0,0	sleep7	1147657	-21	sh	23:10:43	7
607505	2	41	30,8	sleep5	0	-21	swapper/5	19:08:10	5
607505	2	41	30,8	sleep5	0	-21	swapper/5	19:08:10	5
607911	99	40	38,2	cyclictest	1210693	-21	kworker/u16:2+events_unbound	00:04:41	4
607911	99	39	37,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	22:09:42	4
607911	99	38	36,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	22:00:12	4
607911	99	38	36,2	cyclictest	867882	-21	kworker/u16:1+events_unbound	21:19:41	4
607911	99	35	33,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	23:52:32	4
607911	99	35	33,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	23:17:29	4
607911	99	35	33,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	22:33:21	4
607911	99	35	33,2	cyclictest	835502	-21	kworker/u16:0+events_unbound	21:14:53	4
607911	99	35	33,2	cyclictest	1223225	-21	kworker/u16:3+events_unbound	23:45:36	4
607911	99	35	33,2	cyclictest	1210693	-21	kworker/u16:2+events_unbound	00:26:44	4
607911	99	35	33,2	cyclictest	1136004	-21	kworker/u16:0+flush-8:0	23:29:39	4
607911	99	35	33,2	cyclictest	1136004	-21	kworker/u16:0+events_unbound	23:32:36	4
607911	99	35	33,2	cyclictest	1136004	-21	kworker/u16:0+events_unbound	23:22:48	4
607911	99	34	32,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	23:08:32	4
607911	99	34	32,2	cyclictest	845666	-21	kworker/u16:2+flush-8:0	21:27:20	4
607911	99	34	31,2	cyclictest	867882	-21	kworker/u16:1+flush-8:0	21:29:44	4
607911	99	33	31,2	cyclictest	835502	-21	kworker/u16:0+events_unbound	21:11:22	4
607911	99	33	31,2	cyclictest	1089349	-21	kworker/u16:1+flush-8:0	00:01:04	4
607911	99	33	31,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:11:28	4
607911	99	32	30,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	21:56:41	4
607911	99	32	30,2	cyclictest	845666	-21	kworker/u16:2+events_unbound	22:19:38	4
607911	99	32	30,2	cyclictest	1089349	-21	kworker/u16:1+flush-8:0	23:40:41	4
607911	99	32	30,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:04:37	4
607911	99	31	29,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	22:51:28	4
607911	99	31	29,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	22:47:00	4
607911	99	31	29,2	cyclictest	718938	-21	kworker/u16:2+events_unbound	20:59:54	4
607911	99	31	29,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:56:40	4
607911	99	31	29,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	00:23:13	4
607911	99	30	28,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:21:45	4
607911	99	30	28,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	21:50:29	4
607911	99	30	28,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	21:36:00	4
607911	99	30	28,2	cyclictest	845666	-21	kworker/u16:2+events_unbound	22:05:44	4
607418	2	30	19,8	sleep6	0	-21	swapper/6	19:06:59	6
607418	2	30	19,8	sleep6	0	-21	swapper/6	19:06:59	6
607911	99	29	27,2	cyclictest	845666	-21	kworker/u16:2+events_unbound	22:27:12	4
607911	99	29	27,2	cyclictest	631460	-21	kworker/u16:2+flush-8:0	19:24:39	4
607911	99	29	27,2	cyclictest	1270129	-21	kworker/u16:0+flush-8:0	00:16:56	4
607918	99	28	26,2	cyclictest	776060	-21	kworker/u16:5+events_unbound	20:45:09	6
607918	99	28	26,2	cyclictest	559130	-21	kworker/u16:3+events_unbound	19:13:06	6
607918	99	28	26,2	cyclictest	1270129	-21	kworker/u16:0+events_unbound	00:08:53	6
607918	99	28	26,2	cyclictest	1210693	-21	kworker/u16:2+events_unbound	00:23:54	6
607911	99	28	26,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	22:37:41	4
607911	99	28	26,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	21:40:29	4
607911	99	28	26,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	22:56:29	4
607911	99	28	26,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	00:30:44	4
607918	99	27	25,2	cyclictest	559130	-21	kworker/u16:3+events_unbound	19:34:05	6
607918	99	27	25,2	cyclictest	559130	-21	kworker/u16:3+events_unbound	19:34:05	6
607913	99	27	24,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:19:44	5
607911	99	27	25,2	cyclictest	845666	-21	kworker/u16:2+events_unbound	21:46:37	4
607911	99	27	25,2	cyclictest	1136004	-21	kworker/u16:0+events_unbound	23:36:13	4
607918	99	26	24,2	cyclictest	835502	-21	kworker/u16:0+events_unbound	21:06:33	6
607918	99	26	24,2	cyclictest	748100	-21	kworker/u16:4+events_unbound	20:23:08	6
607918	99	26	24,2	cyclictest	718938	-21	kworker/u16:2+events_unbound	21:02:33	6
607911	99	26	24,2	cyclictest	1270129	-21	kworker/u16:0+events_unbound	00:10:39	4
607918	99	25	23,2	cyclictest	894006	-21	kworker/u16:3+flush-8:0	21:55:20	6
607918	99	25	23,2	cyclictest	689435	-21	kworker/u16:4+events_unbound	20:04:09	6
607918	99	25	23,2	cyclictest	689435	-21	kworker/u16:4+events_unbound	19:56:18	6
607913	99	25	23,2	cyclictest	835852	-21	kworker/u16:3+events_unbound	21:12:17	5
607911	99	25	23,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:41:53	4
607911	99	25	23,2	cyclictest	776060	-21	kworker/u16:5+events_unbound	20:44:34	4
607911	99	25	23,2	cyclictest	559130	-21	kworker/u16:3+events_unbound	19:47:14	4
607920	99	24	18,5	cyclictest	648	-21	systemd-journal	19:54:39	7
607918	99	24	22,2	cyclictest	845666	-21	kworker/u16:2+flush-8:0	22:25:04	6
607918	99	24	22,2	cyclictest	718938	-21	kworker/u16:2+events_unbound	20:12:54	6
607913	99	24	22,2	cyclictest	967058	-21	kworker/u16:4+flush-8:0	22:55:34	5
607913	99	24	22,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:31:20	5
607913	99	24	22,2	cyclictest	845666	-21	kworker/u16:2+events_unbound	22:43:21	5
607913	99	24	22,2	cyclictest	835502	-21	kworker/u16:0+events_unbound	21:21:14	5
607913	99	24	22,2	cyclictest	1270129	-21	kworker/u16:0+events_unbound	00:12:48	5
607911	99	24	22,2	cyclictest	718938	-21	kworker/u16:2+flush-8:0	20:35:00	4
607911	99	24	22,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	00:37:43	4
607918	99	23	21,2	cyclictest	806382	-21	kworker/u16:1+events_unbound	20:52:05	6
607918	99	23	21,2	cyclictest	631460	-21	kworker/u16:2+events_unbound	19:21:13	6
607918	99	23	21,2	cyclictest	559130	-21	kworker/u16:3+events_unbound	19:15:17	6
607913	99	23	21,2	cyclictest	894006	-21	kworker/u16:3+events_unbound	21:54:45	5
607913	99	23	21,2	cyclictest	1307070	-21	kworker/u16:3+events_unbound	00:32:20	5
607913	99	23	21,2	cyclictest	1210693	-21	kworker/u16:2+events_unbound	00:05:04	5
607913	99	23	21,2	cyclictest	1210693	-21	kworker/u16:2+events_unbound	00:02:24	5
607913	99	23	21,2	cyclictest	1136004	-21	kworker/u16:0+events_unbound	23:37:21	5
607913	99	23	21,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:06:52	5
607913	99	23	19,2	cyclictest	1089349	-21	kworker/u16:1+events_unbound	23:12:24	5
607911	99	23	21,2	cyclictest	631460	-21	kworker/u16:2+flush-8:0	19:54:58	4
607918	99	22	20,2	cyclictest	738215	-21	kworker/u16:3+events_unbound	20:43:41	6
607918	99	22	20,2	cyclictest	708896	-21	kworker/u16:0+events_unbound	20:18:01	6
607918	99	22	20,2	cyclictest	689435	-21	kworker/u16:4+events_unbound	19:54:34	6
607918	99	22	20,2	cyclictest	670119	-21	kworker/u16:0+events_unbound	19:41:09	6
607918	99	22	19,2	cyclictest	1089349	-21	kworker/u16:1+flush-8:0	00:35:09	6
607918	99	22	16,6	cyclictest	967058	-21	kworker/u16:4+events_unbound	22:55:18	6
607913	99	22	20,2	cyclictest	967058	-21	kworker/u16:4+events_unbound	23:32:24	5
607913	99	22	20,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:49:13	5
607913	99	22	20,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:37:25	5
607913	99	22	20,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	22:26:37	5
607913	99	22	20,2	cyclictest	943934	-21	kworker/u16:0+events_unbound	21:50:49	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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