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 Apr 19, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2088874	2	47	0,0	sleep7	2088875	-21	sh	10:52:16	7
2162580	2	42	0,0	sleep7	2162581	-21	sh	11:23:02	7
1600025	99	42	36,5	cyclictest	635	-21	systemd-journal	10:49:41	7
1600025	99	42	36,5	cyclictest	635	-21	systemd-journal	10:49:41	7
1600011	99	42	39,2	cyclictest	2163284	-21	kworker/u16:1+flush-8:0	11:54:46	4
1590578	2	40	4,30	sleep7	0	-21	swapper/7	07:04:52	7
1600020	99	39	37,2	cyclictest	1768024	-21	kworker/u16:2+events_unbound	09:11:39	6
1600025	99	38	36,1	cyclictest	1833980	-21	diskmemload	09:38:39	7
1600025	99	38	35,2	cyclictest	1931504	-21	munin-run	09:49:41	7
1600020	99	38	36,2	cyclictest	1944000	-21	kworker/u16:3+events_unbound	10:12:55	6
1600020	99	38	35,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	12:34:42	6
1600020	99	37	35,2	cyclictest	2163284	-21	kworker/u16:1+events_unbound	11:24:24	6
1600020	99	37	35,2	cyclictest	1930924	-21	kworker/u16:0+events_unbound	09:58:35	6
1600020	99	37	35,2	cyclictest	1916820	-21	kworker/u16:2+events_unbound	09:44:36	6
1600020	99	37	34,2	cyclictest	2029410	-21	kworker/u16:1+flush-8:0	10:44:40	6
1599660	2	37	11,7	sleep5	0	-21	swapper/5	07:08:51	5
1600025	99	36	35,0	cyclictest	0	-21	swapper/7	10:14:40	7
1600025	99	36	35,0	cyclictest	0	-21	swapper/7	09:21:35	7
1600025	99	36	35,0	cyclictest	0	-21	swapper/7	09:21:35	7
1600020	99	36	34,2	cyclictest	2237116	-21	kworker/u16:0+events_unbound	12:16:14	6
1600020	99	36	34,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:02:00	6
1600025	99	35	34,0	cyclictest	0	-21	swapper/7	11:54:07	7
1600025	99	35	34,0	cyclictest	0	-21	swapper/7	10:33:00	7
1600025	99	35	33,1	cyclictest	0	-21	swapper/7	11:57:55	7
1600025	99	35	31,3	cyclictest	2321070	-21	sh	12:27:47	7
1600020	99	35	33,2	cyclictest	2249256	-21	kworker/u16:4+events_unbound	12:32:35	6
1600020	99	35	33,2	cyclictest	2249256	-21	kworker/u16:4+events_unbound	12:29:35	6
1600020	99	35	33,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	11:34:38	6
1600020	99	35	33,2	cyclictest	2089397	-21	kworker/u16:1+events_unbound	11:05:44	6
1600020	99	35	33,2	cyclictest	2014536	-21	kworker/u16:2+events_unbound	10:48:48	6
1600020	99	35	33,2	cyclictest	2014536	-21	kworker/u16:2+events_unbound	10:48:48	6
1600020	99	35	33,2	cyclictest	1956364	-21	kworker/u16:1+events_unbound	10:17:15	6
1600025	99	34	33,0	cyclictest	0	-21	swapper/7	10:27:32	7
1600025	99	34	32,1	cyclictest	2004123	-21	ssh	10:18:35	7
1600020	99	34	32,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	12:06:55	6
1600020	99	34	32,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	11:38:27	6
1600020	99	34	32,2	cyclictest	2069783	-21	kworker/u16:0+events_unbound	10:58:11	6
1600020	99	34	32,2	cyclictest	1916820	-21	kworker/u16:2+events_unbound	09:47:11	6
1600020	99	34	32,2	cyclictest	1858306	-21	kworker/u16:1+events_unbound	09:51:19	6
1600020	99	34	32,2	cyclictest	1856000	-21	kworker/u16:0+events_unbound	09:33:46	6
1600020	99	34	32,2	cyclictest	1824131	-21	kworker/u16:3+events_unbound	09:21:39	6
1600020	99	34	32,2	cyclictest	1824131	-21	kworker/u16:3+events_unbound	09:21:39	6
1600020	99	34	32,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:38:07	6
1599721	2	34	24,7	sleep6	0	-21	swapper/6	07:09:40	6
1600025	99	33	32,0	cyclictest	0	-21	swapper/7	12:20:30	7
1600025	99	33	32,0	cyclictest	0	-21	swapper/7	12:15:35	7
1600025	99	33	32,0	cyclictest	0	-21	swapper/7	12:00:59	7
1600025	99	33	32,0	cyclictest	0	-21	swapper/7	11:46:38	7
1600025	99	33	32,0	cyclictest	0	-21	swapper/7	09:57:15	7
1600025	99	33	29,3	cyclictest	1025	-21	runrttasks	08:23:03	7
1600020	99	33	31,2	cyclictest	2283371	-21	kworker/u16:1+events_unbound	12:23:02	6
1600020	99	33	31,2	cyclictest	2163284	-21	kworker/u16:1+events_unbound	12:04:30	6
1600020	99	33	31,2	cyclictest	2069783	-21	kworker/u16:0+events_unbound	11:13:00	6
1600020	99	33	31,2	cyclictest	2069783	-21	kworker/u16:0+events_unbound	11:02:35	6
1600020	99	33	31,2	cyclictest	2014536	-21	kworker/u16:2+events_unbound	11:40:59	6
1600020	99	33	31,2	cyclictest	2014536	-21	kworker/u16:2+events_unbound	10:34:36	6
1600020	99	33	31,2	cyclictest	1930924	-21	kworker/u16:0+events_unbound	10:06:43	6
1600020	99	33	31,2	cyclictest	1930924	-21	kworker/u16:0+events_unbound	10:06:43	6
1600020	99	33	31,2	cyclictest	1856000	-21	kworker/u16:0+events_unbound	09:28:06	6
1600020	99	33	30,2	cyclictest	1571508	-21	kworker/u16:0+events_unbound	07:09:44	6
1600011	99	33	31,2	cyclictest	1856000	-21	kworker/u16:0+events_unbound	09:39:55	4
1600025	99	32	31,0	cyclictest	0	-21	swapper/7	11:44:38	7
1600025	99	32	31,0	cyclictest	0	-21	swapper/7	11:14:44	7
1600025	99	32	31,0	cyclictest	0	-21	swapper/7	09:42:04	7
1600025	99	32	31,0	cyclictest	0	-21	swapper/7	09:17:19	7
1600020	99	32	30,2	cyclictest	2163284	-21	kworker/u16:1+events_unbound	11:50:59	6
1600020	99	32	30,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	11:47:59	6
1600020	99	32	30,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:25:43	6
1600011	99	32	30,2	cyclictest	1994268	-21	kworker/u16:0+events_unbound	10:15:52	4
1600011	99	32	30,2	cyclictest	1858306	-21	kworker/u16:1+events_unbound	09:52:51	4
1600011	99	32	30,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:35:52	4
1600011	99	32	29,2	cyclictest	2249256	-21	kworker/u16:4+events_unbound	12:27:51	4
1600011	99	32	29,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	12:34:51	4
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	11:35:48	7
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	11:27:12	7
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	11:27:12	7
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	10:38:27	7
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	10:06:22	7
1600025	99	31	30,0	cyclictest	0	-21	swapper/7	10:06:22	7
1600025	99	31	29,1	cyclictest	1941553	-21	ssh	09:50:55	7
1600025	99	31	29,1	cyclictest	1833980	-21	diskmemload	10:23:32	7
1600011	99	31	29,2	cyclictest	2102562	-21	kworker/u16:3+events_unbound	11:46:51	4
1600011	99	31	29,2	cyclictest	2014536	-21	kworker/u16:2+events_unbound	11:43:51	4
1600011	99	31	29,2	cyclictest	1824131	-21	kworker/u16:3+events_unbound	09:15:51	4
1600011	99	31	29,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:22:51	4
1600025	99	30	29,0	cyclictest	0	-21	swapper/7	12:34:08	7
1600025	99	30	29,0	cyclictest	0	-21	swapper/7	12:09:15	7
1600025	99	30	29,0	cyclictest	0	-21	swapper/7	11:11:19	7
1600025	99	30	29,0	cyclictest	0	-21	swapper/7	10:56:26	7
1600020	99	30	28,2	cyclictest	2237116	-21	kworker/u16:0+events_unbound	12:11:26	6
1600020	99	30	28,2	cyclictest	2069783	-21	kworker/u16:0+events_unbound	11:19:02	6
1600020	99	30	28,2	cyclictest	1768024	-21	kworker/u16:2+events_unbound	09:02:51	6
1600020	99	30	28,2	cyclictest	1768024	-21	kworker/u16:2+events_unbound	08:37:52	6
1600020	99	30	28,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	08:11:47	6
1600011	99	30	28,2	cyclictest	1669653	-21	kworker/u16:4+events_unbound	10:28:52	4
1600011	99	30	28,2	cyclictest	1613640	-21	kworker/u16:2+flush-8:0	07:14:59	4
1600025	99	29	28,0	cyclictest	0	-21	swapper/7	12:11:44	7
1600025	99	29	28,0	cyclictest	0	-21	swapper/7	11:04:34	7
1600025	99	29	28,0	cyclictest	0	-21	swapper/7	09:31:44	7
1600025	99	29	28,0	cyclictest	0	-21	swapper/7	09:12:27	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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