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 Tue Jun 02, 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
1563343	2	58	47,8	sleep4	0	-21	swapper/4	19:04:40	4
1563791	99	48	46,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	22:57:20	5
1563787	99	47	45,2	cyclictest	1625189	-21	kworker/u16:1+events_unbound	19:46:48	4
1563797	99	46	0,44	cyclictest	2291992	-21	latency_hist	00:31:47	7
1563335	2	46	36,7	sleep5	0	-21	swapper/5	19:04:33	5
1563787	99	43	41,2	cyclictest	2120699	-21	kworker/u16:0+events_unbound	00:36:47	4
1563791	99	42	40,2	cyclictest	1663310	-21	kworker/u16:3+events_unbound	20:42:16	5
1563797	99	40	38,1	cyclictest	0	-21	swapper/7	21:06:51	7
1563791	99	40	38,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	22:37:15	5
1563222	2	40	3,31	sleep7	0	-21	swapper/7	19:02:58	7
1563797	99	38	31,6	cyclictest	1740014	-21	latency_hist	20:36:48	7
1563797	99	36	31,4	cyclictest	1653784	-21	latency_hist	19:51:48	7
1563791	99	36	34,2	cyclictest	2207555	-21	kworker/u16:3+events_unbound	00:04:30	5
1563791	99	36	34,2	cyclictest	2194251	-21	kworker/u16:1+events_unbound	23:52:41	5
1563791	99	36	34,2	cyclictest	2194251	-21	kworker/u16:1+events_unbound	23:52:41	5
1563791	99	36	34,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:29:37	5
1563791	99	36	34,2	cyclictest	2026646	-21	kworker/u16:2+events_unbound	22:56:10	5
1563791	99	36	34,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	22:25:06	5
1563791	99	35	33,2	cyclictest	2217566	-21	kworker/u16:4+events_unbound	00:00:10	5
1563791	99	35	33,2	cyclictest	2120699	-21	kworker/u16:0+events_unbound	00:31:46	5
1563791	99	35	33,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:47:30	5
1563791	99	35	33,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:43:14	5
1563791	99	35	33,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	21:42:53	5
1563791	99	35	33,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	23:36:14	5
1563797	99	34	33,0	cyclictest	0	-21	swapper/7	22:57:26	7
1563797	99	34	32,1	cyclictest	0	-21	swapper/7	21:44:50	7
1563791	99	34	32,2	cyclictest	2062785	-21	kworker/u16:3+events_unbound	23:05:54	5
1563791	99	34	32,2	cyclictest	1927768	-21	kworker/u16:2+events_unbound	22:09:22	5
1563791	99	34	32,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	22:45:02	5
1563791	99	34	32,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	21:35:18	5
1563791	99	34	32,2	cyclictest	1772026	-21	kworker/u16:2+flush-8:0	21:22:33	5
1563791	99	34	32,2	cyclictest	1759588	-21	kworker/u16:4+events_unbound	21:19:02	5
1563787	99	34	32,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	21:26:34	4
1563797	99	33	32,0	cyclictest	0	-21	swapper/7	21:22:57	7
1563797	99	33	32,0	cyclictest	0	-21	swapper/7	00:19:58	7
1563797	99	33	31,1	cyclictest	2098235	-21	ssh	23:10:25	7
1563797	99	33	31,1	cyclictest	1797618	-21	diskmemload	23:56:45	7
1563797	99	33	31,1	cyclictest	1797618	-21	diskmemload	23:56:45	7
1563791	99	33	31,2	cyclictest	2207555	-21	kworker/u16:3+events_unbound	00:23:14	5
1563791	99	33	31,2	cyclictest	2207555	-21	kworker/u16:3+events_unbound	00:13:33	5
1563791	99	33	31,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:20:38	5
1563791	99	33	31,2	cyclictest	2062785	-21	kworker/u16:3+events_unbound	23:08:09	5
1563797	99	32	29,2	cyclictest	1905813	-21	ssh	21:51:14	7
1563791	99	32	30,2	cyclictest	2120699	-21	kworker/u16:0+events_unbound	23:25:02	5
1563791	99	32	30,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:37:38	5
1563791	99	32	30,2	cyclictest	2062785	-21	kworker/u16:3+events_unbound	23:14:13	5
1563791	99	32	30,2	cyclictest	2062785	-21	kworker/u16:3+events_unbound	23:14:13	5
1563791	99	32	30,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	22:04:42	5
1563787	99	32	30,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:46:45	4
1563797	99	31	30,0	cyclictest	0	-21	swapper/7	23:27:59	7
1563797	99	31	30,0	cyclictest	0	-21	swapper/7	00:07:34	7
1563797	99	31	29,1	cyclictest	1964447	-21	ssh	22:13:18	7
1563797	99	31	29,1	cyclictest	0	-21	swapper/7	00:01:46	7
1563797	99	31	28,2	cyclictest	2001332	-21	ssh	22:29:45	7
1563791	99	31	29,2	cyclictest	1894414	-21	kworker/u16:3+events_unbound	21:55:37	5
1563791	99	31	29,2	cyclictest	1833041	-21	kworker/u16:0+events_unbound	21:51:07	5
1563791	99	31	29,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	21:14:33	5
1563791	99	31	29,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	21:14:33	5
1563791	99	31	29,2	cyclictest	1702119	-21	kworker/u16:0+events_unbound	20:26:50	5
1563791	99	31	29,2	cyclictest	1702119	-21	kworker/u16:0+events_unbound	20:26:50	5
1563791	99	31	27,3	cyclictest	2120699	-21	kworker/u16:0+flush-8:0	00:32:35	5
1563345	2	31	21,7	sleep6	0	-21	swapper/6	19:04:42	6
1563797	99	30	29,0	cyclictest	0	-21	swapper/7	21:18:58	7
1563797	99	30	28,1	cyclictest	1797618	-21	diskmemload	23:35:50	7
1563797	99	30	28,1	cyclictest	1797618	-21	diskmemload	21:34:54	7
1563791	99	30	28,2	cyclictest	2217566	-21	kworker/u16:4+flush-8:0	00:10:09	5
1563791	99	30	28,2	cyclictest	2000096	-21	kworker/u16:3+events_unbound	22:32:53	5
1563791	99	30	28,2	cyclictest	2000096	-21	kworker/u16:3+events_unbound	22:32:53	5
1563787	99	30	28,2	cyclictest	2120699	-21	kworker/u16:0+flush-8:0	23:25:06	4
1563797	99	29	28,0	cyclictest	0	-21	swapper/7	22:37:26	7
1563797	99	29	28,0	cyclictest	0	-21	swapper/7	21:37:58	7
1563797	99	29	27,1	cyclictest	2121531	-21	ssh	23:18:54	7
1563797	99	29	27,1	cyclictest	1928031	-21	ssh	21:57:50	7
1563791	99	29	27,2	cyclictest	2000096	-21	kworker/u16:3+events_unbound	22:27:38	5
1563791	99	29	27,2	cyclictest	1772026	-21	kworker/u16:2+events_unbound	21:09:02	5
1563791	99	29	27,2	cyclictest	1563557	-21	kworker/u16:4+flush-8:0	19:17:22	5
1563787	99	29	27,2	cyclictest	2074864	-21	kworker/u16:4+flush-8:0	23:48:45	4
1563787	99	29	26,2	cyclictest	2074864	-21	kworker/u16:4+events_unbound	23:31:50	4
1563797	99	28	27,0	cyclictest	0	-21	swapper/7	21:13:05	7
1563797	99	28	27,0	cyclictest	0	-21	swapper/7	21:13:05	7
1563797	99	28	27,0	cyclictest	0	-21	swapper/7	00:23:06	7
1563797	99	28	27,0	cyclictest	0	-21	swapper/7	00:15:05	7
1563797	99	28	26,1	cyclictest	2132764	-21	ssh	23:22:25	7
1563797	99	28	26,1	cyclictest	2084731	-21	ssh	23:02:41	7
1563797	99	28	26,1	cyclictest	2036253	-21	ssh	22:42:26	7
1563797	99	28	0,26	cyclictest	0	-21	swapper/7	20:12:12	7
1563792	99	28	26,2	cyclictest	1772026	-21	kworker/u16:2+events_unbound	21:12:18	6
1563792	99	28	26,2	cyclictest	1772026	-21	kworker/u16:2+events_unbound	21:12:18	6
1563791	99	28	26,2	cyclictest	2026646	-21	kworker/u16:2+events_unbound	22:51:13	5
1563791	99	28	26,2	cyclictest	1500648	-21	kworker/u16:2+events_unbound	20:12:51	5
1563787	99	28	26,2	cyclictest	1833041	-21	kworker/u16:0+flush-8:0	21:36:44	4
1563787	99	28	26,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	21:27:09	4
1563797	99	27	26,0	cyclictest	0	-21	swapper/7	23:38:42	7
1563797	99	27	26,0	cyclictest	0	-21	swapper/7	23:13:43	7
1563797	99	27	26,0	cyclictest	0	-21	swapper/7	23:13:43	7
1563797	99	27	26,0	cyclictest	0	-21	swapper/7	20:26:34	7
1563792	99	27	25,2	cyclictest	1663310	-21	kworker/u16:3+events_unbound	20:37:17	6
1563792	99	27	25,2	cyclictest	1563557	-21	kworker/u16:4+flush-8:0	19:27:14	6
1563791	99	27	25,2	cyclictest	1772026	-21	kworker/u16:2+events_unbound	21:41:05	5
1563791	99	27	25,2	cyclictest	1759587	-21	kworker/u16:1+events_unbound	21:29:22	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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