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 Apr 20, 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
254056	2	96	0,1	sleep7	254057	-21	kthreadcore	19:55:03	7
158003	99	44	41,2	cyclictest	119608	-21	kworker/u16:2+flush-8:0	19:29:39	4
158003	99	44	41,2	cyclictest	119608	-21	kworker/u16:2+flush-8:0	19:29:39	4
157567	2	43	33,7	sleep5	0	-21	swapper/5	19:07:34	5
149304	2	41	3,31	sleep7	0	-21	swapper/7	19:04:55	7
158011	99	40	37,2	cyclictest	824648	-21	kworker/u16:2+events_unbound	00:24:56	6
158011	99	40	37,2	cyclictest	824648	-21	kworker/u16:2+events_unbound	00:24:56	6
158009	99	40	39,1	cyclictest	476199	-21	kworker/u16:0+flush-8:0	22:19:39	5
158016	99	39	0,37	cyclictest	621348	-21	latency_hist	22:44:39	7
158011	99	39	32,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	23:49:53	6
158016	99	38	36,1	cyclictest	180937	-21	latency_hist	19:19:39	7
158011	99	38	36,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	22:05:57	6
158011	99	37	35,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	00:14:54	6
158011	99	37	35,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	00:08:25	6
158011	99	37	35,2	cyclictest	524671	-21	kworker/u16:1+events_unbound	22:50:29	6
158011	99	37	35,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:47:21	6
158011	99	37	35,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:43:09	6
158011	99	37	35,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	22:02:48	6
157547	2	37	27,7	sleep4	0	-21	swapper/4	19:07:17	4
158016	99	36	34,1	cyclictest	0	-21	swapper/7	23:50:09	7
158016	99	36	0,34	cyclictest	635	-21	systemd-journal	22:24:39	7
158016	99	36	0,34	cyclictest	635	-21	systemd-journal	22:24:39	7
158011	99	36	34,2	cyclictest	718182	-21	kworker/u16:4+flush-8:0	23:27:29	6
158011	99	36	34,2	cyclictest	633620	-21	kworker/u16:3+events_unbound	23:20:13	6
158011	99	36	34,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:33:01	6
158011	99	36	34,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	21:52:38	6
158011	99	36	34,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	22:16:13	6
158011	99	35	33,2	cyclictest	839072	-21	kworker/u16:0+events_unbound	00:22:33	6
158011	99	35	33,2	cyclictest	824648	-21	kworker/u16:2+events_unbound	00:13:26	6
158011	99	35	33,2	cyclictest	633620	-21	kworker/u16:3+events_unbound	23:03:38	6
158011	99	35	33,2	cyclictest	633620	-21	kworker/u16:3+events_unbound	23:03:38	6
158011	99	35	33,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	21:32:56	6
158011	99	35	33,2	cyclictest	362943	-21	kworker/u16:1+events_unbound	21:23:17	6
158003	99	35	33,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:30:21	4
158003	99	35	33,2	cyclictest	363104	-21	kworker/u16:2+flush-8:0	22:09:39	4
157457	2	35	25,7	sleep6	0	-21	swapper/6	19:05:59	6
158011	99	34	32,2	cyclictest	839209	-21	kworker/u16:4+events_unbound	00:32:24	6
158011	99	34	32,2	cyclictest	524671	-21	kworker/u16:1+events_unbound	23:08:57	6
158011	99	34	32,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	22:21:24	6
158011	99	34	32,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	22:21:24	6
158011	99	34	31,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	21:41:02	6
477830	2	33	0,1	chrt	477831	-21	irqcore	21:44:57	7
158011	99	33	31,2	cyclictest	718182	-21	kworker/u16:4+events_unbound	23:47:01	6
158011	99	33	31,2	cyclictest	633620	-21	kworker/u16:3+flush-8:0	00:00:38	6
158011	99	33	31,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	21:47:53	6
158011	99	33	31,2	cyclictest	3639029	-21	kworker/u16:0+flush-8:0	19:14:45	6
158011	99	33	31,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	21:58:53	6
158011	99	33	31,2	cyclictest	362943	-21	kworker/u16:1+events_unbound	21:17:41	6
158011	99	33	31,2	cyclictest	157775	-21	kworker/u16:3+flush-8:0	19:20:01	6
158011	99	32	30,2	cyclictest	416330	-21	kworker/u16:0+events_unbound	21:26:21	6
158003	99	32	29,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:34:53	4
158003	99	32	28,3	cyclictest	887449	-21	kworker/u16:2+flush-8:0	00:34:58	4
158016	99	31	30,0	cyclictest	0	-21	swapper/7	22:34:49	7
158011	99	31	29,2	cyclictest	633620	-21	kworker/u16:3+flush-8:0	23:35:09	6
158011	99	31	29,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	23:16:36	6
158011	99	31	29,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	21:13:29	6
158011	99	31	29,2	cyclictest	362943	-21	kworker/u16:1+events_unbound	21:38:18	6
158011	99	31	29,2	cyclictest	243893	-21	kworker/u16:4+events_unbound	19:50:02	6
158003	99	31	29,2	cyclictest	718182	-21	kworker/u16:4+flush-8:0	23:29:34	4
158003	99	31	29,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	22:19:38	4
158003	99	31	29,2	cyclictest	362943	-21	kworker/u16:1+flush-8:0	21:34:49	4
158011	99	30	28,2	cyclictest	573193	-21	kworker/u16:4+flush-8:0	22:28:36	6
158011	99	30	28,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	23:12:10	6
158011	99	30	28,2	cyclictest	476199	-21	kworker/u16:0+events_unbound	22:56:09	6
158011	99	30	28,2	cyclictest	309773	-21	kworker/u16:4+events_unbound	20:27:45	6
158003	99	30	29,1	cyclictest	476199	-21	kworker/u16:0+events_unbound	23:30:09	4
158003	99	30	27,2	cyclictest	324573	-21	kworker/u16:3+flush-8:0	20:45:05	4
848100	2	29	0,1	chrt	848101	-21	sh	00:15:07	7
158011	99	29	27,2	cyclictest	573193	-21	kworker/u16:4+events_unbound	22:38:08	6
158011	99	29	27,2	cyclictest	438720	-21	kworker/u16:3+events_unbound	22:11:08	6
158011	99	29	27,2	cyclictest	309773	-21	kworker/u16:4+events_unbound	20:35:50	6
158003	99	29	26,2	cyclictest	257782	-21	kworker/u16:0+flush-8:0	20:09:39	4
158016	99	28	23,4	cyclictest	635	-21	systemd-journal	00:00:38	7
158011	99	28	26,2	cyclictest	3639029	-21	kworker/u16:0+events_unbound	19:38:50	6
158011	99	28	26,2	cyclictest	324573	-21	kworker/u16:3+flush-8:0	20:50:09	6
158003	99	28	27,1	cyclictest	416330	-21	kworker/u16:0+events_unbound	21:26:38	4
158003	99	28	26,2	cyclictest	3639029	-21	kworker/u16:0+flush-8:0	19:34:39	4
158011	99	27	25,2	cyclictest	887449	-21	kworker/u16:2+events_unbound	00:38:17	6
158011	99	27	25,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	23:42:28	6
158011	99	27	25,2	cyclictest	718182	-21	kworker/u16:4+events_unbound	23:56:24	6
158011	99	27	25,2	cyclictest	633620	-21	kworker/u16:3+events_unbound	23:30:17	6
158011	99	27	25,2	cyclictest	309773	-21	kworker/u16:4+events_unbound	20:41:49	6
158011	99	27	25,2	cyclictest	309773	-21	kworker/u16:4+events_unbound	20:30:49	6
158011	99	27	25,2	cyclictest	238389	-21	kworker/u16:1+events_unbound	20:01:44	6
158003	99	27	24,2	cyclictest	754850	-21	kworker/u16:1+flush-8:0	23:54:49	4
158003	99	27	24,2	cyclictest	362943	-21	kworker/u16:1+flush-8:0	21:19:57	4
158011	99	26	24,2	cyclictest	257782	-21	kworker/u16:0+flush-8:0	20:15:50	6
158003	99	26	25,1	cyclictest	839072	-21	kworker/u16:0+events_unbound	00:16:57	4
158003	99	26	24,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	00:25:49	4
158003	99	26	24,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	00:25:49	4
158011	99	25	23,2	cyclictest	363104	-21	kworker/u16:2+events_unbound	21:05:01	6
158003	99	25	23,2	cyclictest	718182	-21	kworker/u16:4+events_unbound	23:37:05	4
158003	99	25	23,2	cyclictest	633620	-21	kworker/u16:3+flush-8:0	23:20:41	4
158003	99	25	23,2	cyclictest	633620	-21	kworker/u16:3+flush-8:0	23:05:22	4
158003	99	25	23,2	cyclictest	524671	-21	kworker/u16:1+events_unbound	22:29:20	4
158003	99	25	22,2	cyclictest	754850	-21	kworker/u16:1+events_unbound	00:29:41	4
158003	99	25	22,2	cyclictest	362943	-21	kworker/u16:1+flush-8:0	21:44:49	4
712111	2	24	0,1	chrt	712112	-21	tr	23:20:01	7
158016	99	24	19,4	cyclictest	335050	-21	expr	20:39:52	7
158016	99	24	0,22	cyclictest	635	-21	systemd-journal	22:09:39	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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