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 May 01, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1848386	2	54	43,8	sleep4	0	-21	swapper/4	19:06:32	4
1848852	99	48	42,5	cyclictest	2287274	-21	latency_hist	22:33:55	7
1848852	99	48	42,5	cyclictest	2287274	-21	latency_hist	22:33:55	7
1839406	2	47	36,7	sleep5	0	-21	swapper/5	19:04:00	5
1848842	99	45	42,2	cyclictest	1966507	-21	kworker/u16:3+events_unbound	21:13:57	4
1848852	99	44	38,5	cyclictest	2419837	-21	latency_hist	23:28:55	7
1848847	99	43	40,2	cyclictest	2053706	-21	kworker/u16:4+flush-8:0	20:59:13	6
1848852	99	41	40,0	cyclictest	0	-21	swapper/7	19:13:59	7
1848847	99	41	38,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:39:25	6
6280	89	40	0,33	rtkit-daemon	0	-21	swapper/6	19:04:20	6
1874901	2	40	0,0	sleep4	0	-21	swapper/4	19:19:13	4
1848842	99	40	37,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	00:08:57	4
1839936	2	39	2,31	sleep7	0	-21	swapper/7	19:04:10	7
1848842	99	38	36,2	cyclictest	2190802	-21	kworker/u16:2+flush-8:0	22:59:33	4
1848842	99	38	36,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:43:57	4
1848842	99	37	35,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	23:48:53	4
1848842	99	37	35,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:08:44	4
1848842	99	37	35,2	cyclictest	2082397	-21	kworker/u16:1+events_unbound	21:20:06	4
1848842	99	36	34,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	00:01:41	4
1848842	99	35	33,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	00:06:54	4
1848842	99	35	33,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:33:57	4
1848842	99	35	33,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:28:05	4
1848842	99	35	32,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	23:23:58	4
1848842	99	34	33,1	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:18:34	4
1848842	99	33	31,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:20:06	4
1848842	99	33	30,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	22:03:57	4
2575395	2	32	0,1	chrt	2575396	-21	kthreadcore	00:34:17	7
2575395	2	32	0,1	chrt	2575396	-21	kthreadcore	00:34:17	7
2427039	2	32	0,0	chrt	0	-21	swapper/6	23:29:16	6
1848852	99	32	26,5	cyclictest	2063263	-21	latency_hist	20:58:55	7
1848842	99	32	30,2	cyclictest	2426695	-21	kworker/u16:2+events_unbound	00:19:25	4
1848842	99	32	30,2	cyclictest	2347608	-21	kworker/u16:1+events_unbound	23:17:37	4
1848842	99	32	30,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	21:44:57	4
1848842	99	32	30,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	21:42:05	4
1848842	99	32	30,2	cyclictest	2118590	-21	kworker/u16:4+flush-8:0	22:39:33	4
1848842	99	32	30,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:57:57	4
1848842	99	32	30,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:57:57	4
1848842	99	31	29,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	23:09:46	4
1848842	99	31	29,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:21:05	4
1848842	99	31	29,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:55:05	4
1848842	99	31	29,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:49:05	4
1848842	99	31	29,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	21:55:05	4
1848842	99	31	29,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	00:37:04	4
1848842	99	31	29,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	00:37:04	4
1848842	99	31	29,2	cyclictest	2082397	-21	kworker/u16:1+events_unbound	21:38:05	4
1848847	99	30	28,2	cyclictest	2151858	-21	kworker/u16:0+flush-8:0	21:34:57	6
1848842	99	30	28,2	cyclictest	2518493	-21	kworker/u16:3+events_unbound	00:33:42	4
1848852	99	29	24,4	cyclictest	2335517	-21	latency_hist	22:53:56	7
1848852	99	29	0,27	cyclictest	1900439	-21	latency_hist	19:33:56	7
1848847	99	29	27,2	cyclictest	2151858	-21	kworker/u16:0+flush-8:0	22:38:50	6
1848842	99	29	27,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:12:05	4
1848842	99	29	27,2	cyclictest	2118590	-21	kworker/u16:4+flush-8:0	23:29:01	4
1848842	99	29	27,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	21:53:06	4
1848842	99	29	27,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	21:53:06	4
1848852	99	28	27,0	cyclictest	0	-21	swapper/7	20:29:11	7
1848842	99	28	26,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:38:01	4
1848842	99	28	25,2	cyclictest	2103438	-21	kworker/u16:2+flush-8:0	21:24:01	4
1848847	99	27	25,2	cyclictest	2369247	-21	kworker/u16:0+flush-8:0	00:09:50	6
1848847	99	27	24,3	cyclictest	1839034	-21	kworker/u16:1+flush-8:0	19:24:17	6
1848842	99	27	25,2	cyclictest	2426695	-21	kworker/u16:2+events_unbound	23:41:06	4
1848842	99	27	25,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:31:48	4
1848842	99	27	25,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:31:48	4
1848842	99	27	25,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:00:49	4
1848842	99	27	25,2	cyclictest	2103438	-21	kworker/u16:2+events_unbound	21:30:53	4
1848842	99	27	25,2	cyclictest	2082397	-21	kworker/u16:1+events_unbound	21:13:37	4
1848847	99	26	24,2	cyclictest	2033479	-21	kworker/u16:0+events_unbound	21:09:15	6
1848847	99	26	23,2	cyclictest	2082397	-21	kworker/u16:1+flush-8:0	21:18:56	6
1848842	99	26	24,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	00:26:09	4
1848842	99	26	24,2	cyclictest	2033479	-21	kworker/u16:0+flush-8:0	20:44:19	4
1848842	99	26	24,2	cyclictest	2033479	-21	kworker/u16:0+events_unbound	20:55:05	4
1848842	99	26	24,2	cyclictest	1839034	-21	kworker/u16:1+flush-8:0	19:33:51	4
1848852	99	25	24,0	cyclictest	0	-21	swapper/7	22:34:10	7
1848847	99	25	22,2	cyclictest	2347608	-21	kworker/u16:1+flush-8:0	23:09:00	6
1848847	99	25	22,2	cyclictest	2151858	-21	kworker/u16:0+events_unbound	22:54:12	6
1848842	99	25	23,2	cyclictest	2426695	-21	kworker/u16:2+events_unbound	00:15:30	4
1848842	99	25	23,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	23:53:37	4
1848842	99	25	23,2	cyclictest	1900479	-21	kworker/u16:0+events_unbound	19:49:18	4
1848842	99	25	22,2	cyclictest	1966507	-21	kworker/u16:3+flush-8:0	20:13:56	4
1848852	99	24	23,0	cyclictest	0	-21	swapper/7	23:29:23	7
1848852	99	24	23,0	cyclictest	0	-21	swapper/7	23:14:02	7
1848847	99	24	22,2	cyclictest	2190802	-21	kworker/u16:2+flush-8:0	23:00:06	6
1848847	99	24	22,2	cyclictest	1839034	-21	kworker/u16:1+flush-8:0	20:24:21	6
1848847	99	24	21,2	cyclictest	2118590	-21	kworker/u16:4+flush-8:0	00:24:05	6
1848842	99	24	22,2	cyclictest	2053706	-21	kworker/u16:4+events_unbound	21:06:06	4
1848842	99	24	22,2	cyclictest	1839034	-21	kworker/u16:1+events_unbound	20:37:05	4
1848852	99	23	22,0	cyclictest	0	-21	swapper/7	22:24:13	7
1848852	99	23	22,0	cyclictest	0	-21	swapper/7	21:39:23	7
1848852	99	23	20,2	cyclictest	124	-21	kswapd0	22:02:57	7
1848852	99	23	16,5	cyclictest	2203006	-21	latency_hist	21:58:56	7
1848847	99	23	21,2	cyclictest	2369247	-21	kworker/u16:0+events_unbound	00:00:04	6
1848847	99	23	20,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:29:15	6
1848847	99	23	20,2	cyclictest	2190802	-21	kworker/u16:2+events_unbound	22:29:15	6
1848842	99	23	21,2	cyclictest	292198	-21	kworker/u16:0+events_unbound	19:14:05	4
1848842	99	23	21,2	cyclictest	1900479	-21	kworker/u16:0+events_unbound	19:43:06	4
1848842	99	23	21,2	cyclictest	1900479	-21	kworker/u16:0+events_unbound	19:43:06	4
1848852	99	22	21,0	cyclictest	0	-21	swapper/7	22:39:19	7
1848847	99	22	20,2	cyclictest	2118590	-21	kworker/u16:4+events_unbound	23:45:01	6
1848847	99	22	20,2	cyclictest	1839034	-21	kworker/u16:1+flush-8:0	19:53:56	6
1848842	99	22	20,2	cyclictest	1966507	-21	kworker/u16:3+events_unbound	20:07:05	4
1848852	99	21	20,0	cyclictest	0	-21	swapper/7	21:29:25	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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