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 Mon Jul 20, 2026 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1991234	2	49	39,7	sleep5	0	-21	swapper/5	07:09:32	5
1981973	2	45	33,8	sleep4	0	-21	swapper/4	07:04:42	4
1991091	2	41	30,8	sleep6	0	-21	swapper/6	07:07:33	6
1990474	2	40	3,31	sleep7	0	-21	swapper/7	07:05:09	7
1991520	99	36	34,2	cyclictest	2500094	-21	kworker/u16:2+flush-8:0	11:49:28	5
1991520	99	36	33,2	cyclictest	2647543	-21	kworker/u16:0+events_unbound	12:19:33	5
1991524	99	35	33,2	cyclictest	2559486	-21	kworker/u16:1+events_unbound	11:38:19	6
1991524	99	35	33,2	cyclictest	2484853	-21	kworker/u16:0+events_unbound	10:55:47	6
1991520	99	35	32,2	cyclictest	2537032	-21	kworker/u16:4+flush-8:0	11:19:34	5
1991524	99	34	27,7	cyclictest	2131184	-21	kworker/u16:3+flush-8:0	10:23:51	6
1991524	99	32	30,2	cyclictest	2585950	-21	kworker/u16:4+events_unbound	12:03:20	6
1991524	99	32	30,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:02:10	6
1991524	99	32	30,2	cyclictest	2188500	-21	kworker/u16:0+flush-8:0	10:10:03	6
1991524	99	32	30,2	cyclictest	2188500	-21	kworker/u16:0+events_unbound	09:24:05	6
1991517	99	32	30,2	cyclictest	2585950	-21	kworker/u16:4+events_unbound	11:44:28	4
1991524	99	31	29,2	cyclictest	2500094	-21	kworker/u16:2+flush-8:0	11:56:31	6
1991524	99	31	29,2	cyclictest	2484853	-21	kworker/u16:0+events_unbound	11:27:18	6
1991524	99	31	29,2	cyclictest	2188500	-21	kworker/u16:0+events_unbound	09:52:59	6
1991524	99	31	29,2	cyclictest	2053986	-21	kworker/u16:0+events_unbound	08:23:36	6
1991524	99	29	27,2	cyclictest	2710168	-21	kworker/u16:1+events_unbound	12:26:06	6
1991524	99	29	27,2	cyclictest	2484853	-21	kworker/u16:0+events_unbound	11:31:11	6
1991524	99	29	27,2	cyclictest	2149657	-21	kworker/u16:4+flush-8:0	08:30:47	6
1991524	99	29	27,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	11:40:42	6
1991524	99	29	24,4	cyclictest	2351902	-21	cat	09:59:33	6
1991524	99	29	23,6	cyclictest	2374330	-21	kworker/u16:1+flush-8:0	10:07:13	6
1991520	99	29	26,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	12:19:51	5
1991517	99	29	27,2	cyclictest	1990932	-21	kworker/u16:0+events_unbound	07:10:37	4
1991526	99	28	23,4	cyclictest	648	-21	systemd-journal	10:09:28	7
1991526	99	28	0,26	cyclictest	2644142	-21	cat	11:54:58	7
1991524	99	28	26,2	cyclictest	2647543	-21	kworker/u16:0+events_unbound	12:11:13	6
1991524	99	28	26,2	cyclictest	2484916	-21	kworker/u16:1+events_unbound	10:54:28	6
1991524	99	28	26,2	cyclictest	2401569	-21	kworker/u16:0+events_unbound	10:30:28	6
1991524	99	28	26,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:46:55	6
1991524	99	28	26,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:46:55	6
1991524	99	28	26,2	cyclictest	2188500	-21	kworker/u16:0+events_unbound	09:47:15	6
1991524	99	28	26,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	12:36:27	6
1991524	99	28	26,2	cyclictest	2092195	-21	kworker/u16:2+events_unbound	09:07:36	6
1991520	99	28	26,2	cyclictest	2092195	-21	kworker/u16:2+events_unbound	09:05:00	5
1991526	99	27	25,1	cyclictest	0	-21	swapper/7	07:44:51	7
1991524	99	27	25,2	cyclictest	2585950	-21	kworker/u16:4+events_unbound	12:21:46	6
1991524	99	27	25,2	cyclictest	2559486	-21	kworker/u16:1+events_unbound	11:45:17	6
1991524	99	27	25,2	cyclictest	2240943	-21	kworker/u16:1+events_unbound	09:37:25	6
1991524	99	27	25,2	cyclictest	2188500	-21	kworker/u16:0+events_unbound	09:32:51	6
1991524	99	27	25,2	cyclictest	2188500	-21	kworker/u16:0+events_unbound	09:17:25	6
1991524	99	27	25,2	cyclictest	2131184	-21	kworker/u16:3+flush-8:0	11:00:15	6
1991524	99	27	25,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	11:09:27	6
1991524	99	27	25,2	cyclictest	2053986	-21	kworker/u16:0+events_unbound	07:47:05	6
1991524	99	27	25,2	cyclictest	2023642	-21	kworker/u16:3+events_unbound	07:34:45	6
1991517	99	27	25,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	09:55:47	4
1991517	99	27	25,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	11:03:51	4
2288443	2	26	0,1	chrt	2288444	-21	ssh	09:31:31	7
1991524	99	26	24,2	cyclictest	2585950	-21	kworker/u16:4+events_unbound	12:19:15	6
1991524	99	26	24,2	cyclictest	2315302	-21	kworker/u16:2+flush-8:0	10:34:39	6
1991524	99	26	24,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:15:06	6
1991524	99	26	24,2	cyclictest	2149657	-21	kworker/u16:4+events_unbound	09:02:37	6
1991524	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+flush-8:0	09:26:05	6
1991517	99	26	24,2	cyclictest	2559486	-21	kworker/u16:1+flush-8:0	11:46:42	4
1991517	99	26	24,2	cyclictest	2500094	-21	kworker/u16:2+events_unbound	11:07:48	4
1991517	99	26	24,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:19:45	4
1991517	99	26	24,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:01:21	4
1991517	99	26	24,2	cyclictest	2149657	-21	kworker/u16:4+events_unbound	08:58:25	4
1991517	99	26	24,2	cyclictest	2149657	-21	kworker/u16:4+events_unbound	08:42:00	4
1991517	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+flush-8:0	11:29:55	4
1991517	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	11:11:52	4
1991517	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	09:42:59	4
1991517	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	08:37:40	4
1991517	99	26	24,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	08:37:40	4
1991517	99	26	24,2	cyclictest	2092195	-21	kworker/u16:2+events_unbound	08:54:09	4
1991517	99	26	24,2	cyclictest	2023642	-21	kworker/u16:3+events_unbound	07:39:32	4
1991524	99	25	23,2	cyclictest	2730998	-21	kworker/u16:0+flush-8:0	12:31:46	6
1991524	99	25	23,2	cyclictest	2484853	-21	kworker/u16:0+events_unbound	11:22:02	6
1991524	99	25	23,2	cyclictest	2484853	-21	kworker/u16:0+events_unbound	11:16:26	6
1991524	99	25	23,2	cyclictest	2131184	-21	kworker/u16:3+flush-8:0	10:41:41	6
1991524	99	25	23,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	09:44:15	6
1991524	99	25	23,2	cyclictest	2092195	-21	kworker/u16:2+events_unbound	08:39:36	6
1991524	99	25	23,2	cyclictest	1990932	-21	kworker/u16:0+events_unbound	07:11:04	6
1991520	99	25	23,2	cyclictest	1867007	-21	kworker/u16:1+events_unbound	07:09:48	5
1991517	99	25	23,2	cyclictest	2448181	-21	kworker/u16:1+flush-8:0	10:39:23	4
1991517	99	25	23,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:18:45	4
1991517	99	25	23,2	cyclictest	2131184	-21	kworker/u16:3+events_unbound	09:21:45	4
1991517	99	25	23,2	cyclictest	2092195	-21	kworker/u16:2+flush-8:0	08:16:48	4
2719374	2	24	0,1	chrt	2719373	-21	ssh	12:26:18	7
1991526	99	24	23,0	cyclictest	0	-21	swapper/7	09:19:53	7
1991526	99	24	23,0	cyclictest	0	-21	swapper/7	07:59:52	7
1991526	99	24	22,1	cyclictest	2228300	-21	diskmemload	12:37:36	7
1991526	99	24	22,1	cyclictest	0	-21	swapper/7	11:14:55	7
1991524	99	24	22,2	cyclictest	2669728	-21	kworker/u16:1+flush-8:0	12:06:40	6
1991524	99	24	22,2	cyclictest	2559486	-21	kworker/u16:1+events_unbound	11:52:37	6
1991524	99	24	22,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:28:45	6
1991524	99	24	22,2	cyclictest	2092195	-21	kworker/u16:2+events_unbound	07:58:37	6
1991524	99	24	22,2	cyclictest	1867007	-21	kworker/u16:1+events_unbound	07:17:37	6
1991524	99	24	22,2	cyclictest	1692614	-21	kworker/u16:7+events_unbound	07:52:49	6
1991520	99	24	22,2	cyclictest	2315302	-21	kworker/u16:2+events_unbound	10:14:56	5
1991520	99	24	22,2	cyclictest	2188500	-21	kworker/u16:0+flush-8:0	09:25:00	5
1991520	99	24	22,2	cyclictest	2149657	-21	kworker/u16:4+flush-8:0	08:30:01	5
1991520	99	24	22,2	cyclictest	2023642	-21	kworker/u16:3+flush-8:0	07:30:00	5
1991520	99	24	21,3	cyclictest	2131184	-21	kworker/u16:3+events_unbound	11:59:55	5
1991517	99	24	22,2	cyclictest	2730998	-21	kworker/u16:0+events_unbound	12:34:26	4
1991517	99	24	22,2	cyclictest	2585950	-21	kworker/u16:4+events_unbound	12:28:32	4
1991517	99	24	22,2	cyclictest	2559486	-21	kworker/u16:1+flush-8:0	11:50:17	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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