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 May 17, 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
2548500	2	97	0,1	sleep6	0	-21	swapper/6	00:22:31	6
1842494	2	46	35,7	sleep4	0	-21	swapper/4	19:07:45	4
1842788	99	45	43,2	cyclictest	2488194	-21	kworker/u16:3+events_unbound	00:28:20	5
1842797	99	41	40,0	cyclictest	0	-21	swapper/7	23:28:06	7
1842432	2	41	5,31	sleep7	0	-21	swapper/7	19:06:52	7
6280	89	40	0,33	rtkit-daemon	0	-21	swapper/5	19:05:35	5
1842797	99	40	34,5	cyclictest	635	-21	systemd-journal	00:37:51	7
1842786	99	40	38,2	cyclictest	2473133	-21	kworker/u16:2+events_unbound	23:57:49	4
1842786	99	40	38,2	cyclictest	2473133	-21	kworker/u16:2+events_unbound	23:57:49	4
1842788	99	38	36,2	cyclictest	2488194	-21	kworker/u16:3+events_unbound	00:14:49	5
1842788	99	38	36,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:26:22	5
1842788	99	38	36,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	22:59:50	5
1842788	99	38	36,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	21:44:14	5
1842788	99	38	36,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	21:29:58	5
1842797	99	37	35,1	cyclictest	0	-21	swapper/7	20:28:05	7
1842797	99	37	35,1	cyclictest	0	-21	swapper/7	20:28:05	7
1842788	99	37	35,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:35:49	5
1842788	99	37	35,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:21:49	5
1842788	99	37	35,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	22:30:53	5
1842788	99	37	34,2	cyclictest	2318886	-21	kworker/u16:2+flush-8:0	23:37:57	5
1842788	99	36	34,2	cyclictest	2427661	-21	kworker/u16:4+flush-8:0	23:36:33	5
1842788	99	36	34,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:54:21	5
1842788	99	36	34,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:54:21	5
1842788	99	36	34,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:12:34	5
1842788	99	36	34,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:00:05	5
1842788	99	36	34,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:00:05	5
1842788	99	36	34,2	cyclictest	2331407	-21	kworker/u16:0+events_unbound	23:04:10	5
1842788	99	36	34,2	cyclictest	2222459	-21	kworker/u16:1+flush-8:0	22:53:45	5
1842788	99	36	34,2	cyclictest	2222459	-21	kworker/u16:1+events_unbound	22:52:34	5
1842788	99	36	34,2	cyclictest	2222459	-21	kworker/u16:1+events_unbound	22:36:33	5
1842788	99	36	34,2	cyclictest	2173657	-21	kworker/u16:0+flush-8:0	22:12:46	5
1842788	99	36	34,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	22:02:25	5
1842788	99	36	34,2	cyclictest	1981270	-21	kworker/u16:0+events_unbound	21:25:13	5
1842788	99	36	34,2	cyclictest	1971456	-21	kworker/u16:3+flush-8:0	20:33:19	5
1842788	99	35	33,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:49:05	5
1842788	99	35	33,2	cyclictest	2222459	-21	kworker/u16:1+events_unbound	22:21:57	5
1842788	99	35	33,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	21:55:46	5
1842788	99	35	33,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	22:47:29	5
1842788	99	35	33,2	cyclictest	2057527	-21	kworker/u16:3+events_unbound	21:19:46	5
1842786	99	35	33,2	cyclictest	2415558	-21	kworker/u16:3+events_unbound	23:34:57	4
1842786	99	35	33,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:12:05	4
1842786	99	35	33,2	cyclictest	2222459	-21	kworker/u16:1+events_unbound	22:30:29	4
1842786	99	35	33,2	cyclictest	2057527	-21	kworker/u16:3+events_unbound	21:16:41	4
1842797	99	34	33,0	cyclictest	0	-21	swapper/7	20:08:17	7
1842788	99	34	32,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:06:30	5
1842788	99	34	32,2	cyclictest	2331407	-21	kworker/u16:0+flush-8:0	23:24:57	5
1842788	99	34	32,2	cyclictest	2331407	-21	kworker/u16:0+events_unbound	23:29:42	5
1842788	99	34	32,2	cyclictest	2318886	-21	kworker/u16:2+events_unbound	23:13:29	5
1842788	99	34	32,2	cyclictest	2318886	-21	kworker/u16:2+events_unbound	23:13:29	5
1842788	99	34	32,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	22:25:46	5
1842786	99	34	32,2	cyclictest	1981270	-21	kworker/u16:0+events_unbound	21:23:49	4
1842487	2	34	24,7	sleep6	0	-21	swapper/6	19:07:39	6
1842797	99	33	32,0	cyclictest	0	-21	swapper/7	23:38:05	7
1842797	99	33	32,0	cyclictest	0	-21	swapper/7	19:33:06	7
1842788	99	33	31,2	cyclictest	2318886	-21	kworker/u16:2+flush-8:0	23:20:41	5
1842788	99	33	31,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	22:15:22	5
1842788	99	33	31,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	21:39:25	5
1842788	99	33	31,2	cyclictest	2057527	-21	kworker/u16:3+events_unbound	21:15:34	5
1842788	99	33	31,2	cyclictest	1864644	-21	kworker/u16:0+flush-8:0	20:02:52	5
1842786	99	33	31,2	cyclictest	2331407	-21	kworker/u16:0+events_unbound	23:15:57	4
1842786	99	33	31,2	cyclictest	2331407	-21	kworker/u16:0+events_unbound	23:15:57	4
1842786	99	33	31,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	22:46:09	4
1842797	99	32	31,0	cyclictest	0	-21	swapper/7	22:08:05	7
1842788	99	32	30,2	cyclictest	2473133	-21	kworker/u16:2+events_unbound	00:11:49	5
1842788	99	32	30,2	cyclictest	2452278	-21	kworker/u16:0+events_unbound	23:46:34	5
1842788	99	32	30,2	cyclictest	2222459	-21	kworker/u16:1+events_unbound	22:41:10	5
1842788	99	32	30,2	cyclictest	2173657	-21	kworker/u16:0+events_unbound	21:52:25	5
1842788	99	32	30,2	cyclictest	2173657	-21	kworker/u16:0+events_unbound	21:52:25	5
1842786	99	32	30,2	cyclictest	2452278	-21	kworker/u16:0+events_unbound	23:51:22	4
1842786	99	32	30,2	cyclictest	2377064	-21	kworker/u16:1+flush-8:0	23:41:20	4
1842786	99	32	30,2	cyclictest	2029196	-21	kworker/u16:2+events_unbound	21:19:29	4
1842786	99	32	30,2	cyclictest	1981270	-21	kworker/u16:0+events_unbound	21:02:46	4
1842786	99	31	29,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	22:05:05	4
1842786	99	31	29,2	cyclictest	1864644	-21	kworker/u16:0+events_unbound	20:05:15	4
1842788	99	30	28,2	cyclictest	2173657	-21	kworker/u16:0+events_unbound	22:05:22	5
1842788	99	30	28,2	cyclictest	1904020	-21	kworker/u16:1+events_unbound	19:47:55	5
1842786	99	30	28,2	cyclictest	2473133	-21	kworker/u16:2+events_unbound	00:14:08	4
1842786	99	30	28,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	23:25:40	4
1842786	99	30	28,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:35:22	4
1842786	99	30	28,2	cyclictest	2331407	-21	kworker/u16:0+flush-8:0	23:04:49	4
1842786	99	30	28,2	cyclictest	2173657	-21	kworker/u16:0+flush-8:0	21:53:28	4
1842786	99	30	28,2	cyclictest	2125609	-21	kworker/u16:3+events_unbound	21:45:19	4
1842797	99	29	27,1	cyclictest	2392571	-21	sh	23:18:06	7
1842788	99	29	27,2	cyclictest	1981270	-21	kworker/u16:0+flush-8:0	21:01:46	5
1842786	99	29	27,2	cyclictest	380635	-21	kworker/u16:4+events_unbound	19:40:47	4
1842786	99	29	27,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:08:30	4
1842786	99	29	27,2	cyclictest	2173657	-21	kworker/u16:0+events_unbound	21:50:39	4
1842786	99	29	27,2	cyclictest	2173657	-21	kworker/u16:0+events_unbound	21:50:39	4
1842786	99	29	27,2	cyclictest	2149768	-21	kworker/u16:4+events_unbound	21:59:19	4
1842786	99	29	27,2	cyclictest	1813918	-21	kworker/u16:2+events_unbound	19:19:47	4
1842797	99	28	27,0	cyclictest	0	-21	swapper/7	23:08:18	7
1842788	99	28	26,2	cyclictest	1864644	-21	kworker/u16:0+events_unbound	20:07:02	5
1842788	99	28	26,2	cyclictest	1813918	-21	kworker/u16:2+events_unbound	19:16:47	5
1842786	99	28	26,2	cyclictest	2488194	-21	kworker/u16:3+flush-8:0	00:28:34	4
1842786	99	28	26,2	cyclictest	2473133	-21	kworker/u16:2+flush-8:0	23:57:55	4
1842786	99	28	26,2	cyclictest	2473133	-21	kworker/u16:2+flush-8:0	23:57:55	4
1842786	99	28	26,2	cyclictest	2377064	-21	kworker/u16:1+events_unbound	00:04:55	4
1842786	99	28	26,2	cyclictest	2331407	-21	kworker/u16:0+flush-8:0	23:20:20	4
1842786	99	28	26,2	cyclictest	2112747	-21	kworker/u16:1+events_unbound	21:36:27	4
1842786	99	28	26,2	cyclictest	1904020	-21	kworker/u16:1+events_unbound	19:47:14	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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