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 Thu Apr 16, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1807971	2	75	48,8	sleep5	0	-21	swapper/5	07:06:14	5
1808527	99	45	39,5	cyclictest	2032591	-21	latency_hist	09:04:53	7
1807481	2	40	1,32	sleep7	0	-21	swapper/7	07:05:27	7
1808527	99	37	35,1	cyclictest	0	-21	swapper/7	10:58:19	7
1808527	99	37	33,3	cyclictest	2530826	-21	ssh	12:29:00	7
1808526	99	37	35,2	cyclictest	2419094	-21	kworker/u16:0+events_unbound	11:48:40	6
1808526	99	37	35,2	cyclictest	2419094	-21	kworker/u16:0+events_unbound	11:48:40	6
1808526	99	37	35,2	cyclictest	2126014	-21	kworker/u16:3+flush-8:0	09:43:36	6
1807934	2	37	26,8	sleep4	0	-21	swapper/4	07:05:40	4
1808527	99	36	35,0	cyclictest	0	-21	swapper/7	10:04:48	7
1808527	99	35	34,0	cyclictest	0	-21	swapper/7	09:37:09	7
1808527	99	35	33,1	cyclictest	2504719	-21	ssh	12:16:04	7
1808527	99	35	33,1	cyclictest	0	-21	swapper/7	12:32:11	7
1808527	99	35	32,2	cyclictest	2125700	-21	ssh	09:41:00	7
1808526	99	35	33,2	cyclictest	2189041	-21	kworker/u16:4+events_unbound	10:11:17	6
1808527	99	34	33,0	cyclictest	0	-21	swapper/7	10:46:28	7
1808527	99	34	31,2	cyclictest	2077433	-21	ssh	09:22:12	7
1808526	99	34	32,2	cyclictest	2370053	-21	kworker/u16:1+events_unbound	12:04:52	6
1808526	99	34	32,2	cyclictest	2311903	-21	kworker/u16:4+flush-8:0	12:12:55	6
1808526	99	34	32,2	cyclictest	2272525	-21	kworker/u16:0+events_unbound	11:06:08	6
1808526	99	34	32,2	cyclictest	2272525	-21	kworker/u16:0+events_unbound	11:06:08	6
1808526	99	34	32,2	cyclictest	2272525	-21	kworker/u16:0+events_unbound	11:02:59	6
1808526	99	34	32,2	cyclictest	2025242	-21	kworker/u16:1+events_unbound	09:12:20	6
1808526	99	34	32,2	cyclictest	1917210	-21	kworker/u16:2+events_unbound	09:58:29	6
1808527	99	33	32,0	cyclictest	0	-21	swapper/7	10:32:08	7
1808527	99	33	31,1	cyclictest	2469208	-21	ssh	12:03:04	7
1808527	99	33	28,4	cyclictest	2213533	-21	latency_hist	10:19:53	7
1808526	99	33	31,2	cyclictest	2272525	-21	kworker/u16:0+flush-8:0	10:41:48	6
1808526	99	33	31,2	cyclictest	2189041	-21	kworker/u16:4+flush-8:0	10:38:43	6
1808526	99	33	31,2	cyclictest	1917210	-21	kworker/u16:2+events_unbound	10:19:45	6
1808526	99	33	27,6	cyclictest	2311903	-21	kworker/u16:4+flush-8:0	12:05:55	6
1808527	99	32	31,0	cyclictest	0	-21	swapper/7	11:13:24	7
1808527	99	32	31,0	cyclictest	0	-21	swapper/7	10:36:49	7
1808527	99	32	31,0	cyclictest	0	-21	swapper/7	10:22:33	7
1808527	99	32	31,0	cyclictest	0	-21	swapper/7	10:07:07	7
1808527	99	32	29,2	cyclictest	2162838	-21	ssh	09:56:57	7
1808526	99	32	30,2	cyclictest	2470278	-21	kworker/u16:2+events_unbound	12:32:56	6
1808526	99	32	30,2	cyclictest	2454902	-21	kworker/u16:0+flush-8:0	11:55:52	6
1808526	99	32	30,2	cyclictest	2370053	-21	kworker/u16:1+events_unbound	12:18:36	6
1808526	99	32	30,2	cyclictest	2370053	-21	kworker/u16:1+events_unbound	11:39:00	6
1808526	99	32	30,2	cyclictest	2370053	-21	kworker/u16:1+events_unbound	11:26:33	6
1808526	99	32	30,2	cyclictest	2311903	-21	kworker/u16:4+events_unbound	11:33:32	6
1808526	99	32	30,2	cyclictest	1917210	-21	kworker/u16:2+flush-8:0	11:10:47	6
1808526	99	32	30,2	cyclictest	1917210	-21	kworker/u16:2+events_unbound	09:19:40	6
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	12:37:44	7
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	11:37:24	7
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	11:24:11	7
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	11:09:20	7
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	11:09:20	7
1808527	99	31	30,0	cyclictest	0	-21	swapper/7	10:14:23	7
1808527	99	31	29,1	cyclictest	2517535	-21	ssh	12:22:00	7
1808526	99	31	29,2	cyclictest	2470278	-21	kworker/u16:2+flush-8:0	12:21:32	6
1808526	99	31	29,2	cyclictest	2272525	-21	kworker/u16:0+events_unbound	10:53:32	6
1808526	99	31	29,2	cyclictest	2272525	-21	kworker/u16:0+events_unbound	10:47:11	6
1808526	99	31	29,2	cyclictest	2189042	-21	kworker/u16:5+events_unbound	10:22:59	6
1808526	99	31	29,2	cyclictest	2126014	-21	kworker/u16:3+events_unbound	09:47:48	6
1808526	99	31	28,2	cyclictest	1917210	-21	kworker/u16:2+flush-8:0	09:50:00	6
1808527	99	30	29,0	cyclictest	0	-21	swapper/7	11:46:32	7
1808527	99	30	29,0	cyclictest	0	-21	swapper/7	11:46:32	7
1808527	99	30	29,0	cyclictest	0	-21	swapper/7	11:03:12	7
1808527	99	30	29,0	cyclictest	0	-21	swapper/7	10:52:16	7
1808527	99	30	29,0	cyclictest	0	-21	swapper/7	09:32:33	7
1808527	99	30	28,1	cyclictest	0	-21	swapper/7	12:13:41	7
1808527	99	30	28,1	cyclictest	0	-21	swapper/7	10:42:37	7
1808526	99	30	28,2	cyclictest	2311903	-21	kworker/u16:4+events_unbound	11:21:19	6
1808526	99	30	28,2	cyclictest	2103827	-21	kworker/u16:0+flush-8:0	09:36:51	6
1808526	99	30	28,2	cyclictest	2079244	-21	kworker/u16:1+events_unbound	09:27:05	6
1808526	99	30	28,2	cyclictest	2064343	-21	kworker/u16:3+flush-8:0	09:32:19	6
1808526	99	30	28,2	cyclictest	1917210	-21	kworker/u16:2+events_unbound	10:32:16	6
1808526	99	30	28,2	cyclictest	1917210	-21	kworker/u16:2+events_unbound	10:04:52	6
1808527	99	29	28,0	cyclictest	0	-21	swapper/7	09:53:48	7
1808527	99	29	28,0	cyclictest	0	-21	swapper/7	09:46:12	7
1808526	99	29	27,2	cyclictest	2370053	-21	kworker/u16:1+flush-8:0	11:41:31	6
1808527	99	28	27,0	cyclictest	0	-21	swapper/7	11:41:44	7
1808527	99	28	27,0	cyclictest	0	-21	swapper/7	09:17:48	7
1808527	99	28	27,0	cyclictest	0	-21	swapper/7	09:09:53	7
1808526	99	28	26,2	cyclictest	2311903	-21	kworker/u16:4+events_unbound	11:15:47	6
1808526	99	28	26,2	cyclictest	1091167	-21	kworker/u16:1+flush-8:0	07:12:32	6
1808527	99	27	26,0	cyclictest	0	-21	swapper/7	11:28:58	7
1808527	99	27	26,0	cyclictest	0	-21	swapper/7	09:26:44	7
1808527	99	27	24,2	cyclictest	2395742	-21	ssh	11:32:31	7
1808526	99	27	25,2	cyclictest	2311903	-21	kworker/u16:4+flush-8:0	11:52:21	6
1808526	99	27	25,2	cyclictest	2311903	-21	kworker/u16:4+flush-8:0	11:52:21	6
1808526	99	27	25,2	cyclictest	1965706	-21	kworker/u16:0+flush-8:0	09:02:53	6
1808526	99	27	25,2	cyclictest	1937139	-21	kworker/u16:3+events_unbound	08:24:33	6
1808526	99	27	25,2	cyclictest	1917210	-21	kworker/u16:2+flush-8:0	10:08:20	6
1808526	99	27	25,2	cyclictest	1898705	-21	kworker/u16:1+flush-8:0	08:12:32	6
1808526	99	27	25,2	cyclictest	1787320	-21	kworker/u16:0+events_unbound	08:08:04	6
1808527	99	26	25,0	cyclictest	0	-21	swapper/7	11:54:39	7
1808527	99	26	25,0	cyclictest	0	-21	swapper/7	11:54:39	7
1808527	99	26	25,0	cyclictest	0	-21	swapper/7	11:18:03	7
1808527	99	26	25,0	cyclictest	0	-21	swapper/7	09:11:20	7
1808526	99	26	24,2	cyclictest	1937139	-21	kworker/u16:3+flush-8:0	08:16:17	6
1808526	99	26	23,2	cyclictest	2470278	-21	kworker/u16:2+flush-8:0	12:35:00	6
1808517	99	26	24,2	cyclictest	1091167	-21	kworker/u16:1+flush-8:0	07:14:59	4
1808077	2	26	16,7	sleep6	0	-21	swapper/6	07:07:43	6
1808527	99	25	24,0	cyclictest	0	-21	swapper/7	10:27:23	7
1808526	99	25	23,2	cyclictest	2238160	-21	kworker/u16:1+flush-8:0	10:56:33	6
1808526	99	25	23,2	cyclictest	1981591	-21	kworker/u16:4+events_unbound	08:38:33	6
1808526	99	25	23,2	cyclictest	1917210	-21	kworker/u16:2+flush-8:0	10:28:33	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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