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 Jan 25, 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
2124402	2	73	62,7	sleep5	0	-21	swapper/5	19:06:40	5
2124740	99	55	53,2	cyclictest	2382798	-21	kworker/u16:2+events_unbound	21:37:18	6
2124734	99	55	53,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	22:37:18	4
2124740	99	54	52,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:47:18	6
2124734	99	54	52,2	cyclictest	2457084	-21	kworker/u16:0+events_unbound	21:47:30	4
2124740	99	53	51,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:22:29	6
2124734	99	53	51,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:02:34	4
2124237	2	53	43,7	sleep4	0	-21	swapper/4	19:04:22	4
2124740	99	52	50,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	00:17:37	6
2124740	99	52	50,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	00:17:37	6
2124734	99	52	50,2	cyclictest	2444558	-21	kworker/u16:1+flush-8:0	21:52:29	4
2124740	99	51	49,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:32:17	6
2124734	99	51	49,2	cyclictest	2556538	-21	kworker/u16:4+events_unbound	22:27:32	4
2124740	99	49	47,2	cyclictest	2481708	-21	kworker/u16:2+events_unbound	22:02:29	6
2124740	99	49	47,2	cyclictest	2444558	-21	kworker/u16:1+events_unbound	21:52:17	6
2124740	99	49	46,2	cyclictest	2665715	-21	kworker/u16:2+events_unbound	23:17:06	6
2124740	99	49	46,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	23:07:18	6
2124740	99	48	46,2	cyclictest	2444558	-21	kworker/u16:1+events_unbound	22:07:36	6
2124740	99	48	45,2	cyclictest	2725931	-21	kworker/u16:4+events_unbound	00:07:18	6
2124740	99	48	45,2	cyclictest	2457084	-21	kworker/u16:0+events_unbound	21:57:18	6
2124734	99	48	46,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:42:17	4
2124736	99	47	45,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:42:34	5
2124736	99	47	45,2	cyclictest	2245064	-21	kworker/u16:0+flush-8:0	21:17:04	5
2124740	99	46	44,2	cyclictest	2847082	-21	kworker/u16:4+events_unbound	00:27:37	6
2124734	99	45	44,1	cyclictest	2519885	-21	kworker/u16:3+flush-8:0	22:57:03	4
2124740	99	44	41,2	cyclictest	2507284	-21	kworker/u16:0+events_unbound	22:17:32	6
2124740	99	44	41,2	cyclictest	2507284	-21	kworker/u16:0+events_unbound	22:17:32	6
2124734	99	44	42,2	cyclictest	2808302	-21	kworker/u16:0+events_unbound	00:22:38	4
2124744	99	43	38,4	cyclictest	2186569	-21	latency_hist	19:37:04	7
2124736	99	43	41,2	cyclictest	2444558	-21	kworker/u16:1+events_unbound	21:42:33	5
2124734	99	43	41,2	cyclictest	2808302	-21	kworker/u16:0+events_unbound	00:17:33	4
2124734	99	43	41,2	cyclictest	2808302	-21	kworker/u16:0+events_unbound	00:17:33	4
2124734	99	43	41,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	22:42:29	4
2119290	2	43	2,30	sleep7	0	-21	swapper/7	19:02:25	7
2124740	99	42	40,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:47:32	6
2124740	99	42	39,2	cyclictest	2556538	-21	kworker/u16:4+flush-8:0	22:32:19	6
2124736	99	42	40,2	cyclictest	2322449	-21	kworker/u16:1+flush-8:0	21:07:03	5
2124734	99	42	39,3	cyclictest	2519885	-21	kworker/u16:3+flush-8:0	23:52:20	4
2124734	99	42	39,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:22:17	4
2124734	99	42	39,2	cyclictest	2444558	-21	kworker/u16:1+events_unbound	22:47:18	4
2124740	99	41	39,2	cyclictest	2847082	-21	kworker/u16:4+events_unbound	00:32:17	6
2124734	99	41	39,2	cyclictest	2444558	-21	kworker/u16:1+flush-8:0	22:12:35	4
2124734	99	41	38,2	cyclictest	2687468	-21	kworker/u16:1+events_unbound	23:22:17	4
2124734	99	41	38,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:47:06	4
2124744	99	40	39,0	cyclictest	0	-21	swapper/7	23:32:32	7
2124740	99	40	38,2	cyclictest	2687468	-21	kworker/u16:1+events_unbound	23:52:36	6
2124734	99	40	38,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:32:19	4
2124734	99	40	38,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	00:07:16	4
2124740	99	39	37,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	23:02:36	6
2124740	99	39	37,2	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:45:13	6
2124736	99	39	36,2	cyclictest	2507284	-21	kworker/u16:0+events_unbound	22:27:06	5
2124734	99	39	37,2	cyclictest	2834501	-21	kworker/u16:3+events_unbound	00:32:38	4
2124734	99	39	37,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:17:18	4
2124734	99	39	37,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:17:18	4
2124164	2	39	28,8	sleep6	0	-21	swapper/6	19:03:20	6
2124740	99	38	36,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	23:13:04	6
2124740	99	38	36,2	cyclictest	2556538	-21	kworker/u16:4+events_unbound	22:31:14	6
2124740	99	38	36,2	cyclictest	2507284	-21	kworker/u16:0+events_unbound	22:13:14	6
2124740	99	38	36,2	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:52:01	6
2124740	99	38	36,2	cyclictest	2322449	-21	kworker/u16:1+events_unbound	21:13:06	6
2124740	99	38	36,2	cyclictest	2245064	-21	kworker/u16:0+events_unbound	21:19:21	6
2124736	99	38	34,3	cyclictest	2808302	-21	kworker/u16:0+flush-8:0	00:12:18	5
2124734	99	38	37,1	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:34:52	4
2124734	99	38	36,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	00:13:54	4
2124734	99	38	35,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	23:17:18	4
2124744	99	37	35,1	cyclictest	2540728	-21	ssh	22:17:29	7
2124744	99	37	35,1	cyclictest	2540728	-21	ssh	22:17:29	7
2124740	99	37	35,2	cyclictest	2687468	-21	kworker/u16:1+events_unbound	00:23:29	6
2124740	99	37	35,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	22:37:37	6
2124740	99	37	35,2	cyclictest	2556538	-21	kworker/u16:4+events_unbound	22:55:05	6
2124736	99	37	33,3	cyclictest	2701422	-21	kworker/u16:2+flush-8:0	23:27:19	5
2124734	99	37	34,2	cyclictest	2457084	-21	kworker/u16:0+events_unbound	21:57:06	4
2124744	99	36	32,3	cyclictest	124	-21	kswapd0	00:17:18	7
2124744	99	36	32,3	cyclictest	124	-21	kswapd0	00:17:18	7
2124740	99	36	34,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	00:03:29	6
2124740	99	36	34,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	22:57:20	6
2124740	99	36	34,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:45:13	6
2124740	99	36	34,2	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:11:26	6
2124740	99	36	34,2	cyclictest	2245064	-21	kworker/u16:0+events_unbound	21:30:26	6
2124740	99	36	33,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:37:35	6
2124740	99	36	33,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:37:35	6
2124734	99	36	34,2	cyclictest	2774764	-21	kworker/u16:0+events_unbound	23:57:37	4
2124734	99	36	34,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	23:08:13	4
2124734	99	36	34,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:57:06	4
2124734	99	36	34,2	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:45:05	4
2124734	99	36	34,2	cyclictest	2245064	-21	kworker/u16:0+events_unbound	21:22:02	4
2124740	99	35	33,2	cyclictest	2808302	-21	kworker/u16:0+events_unbound	00:14:24	6
2124740	99	35	33,2	cyclictest	2444558	-21	kworker/u16:1+events_unbound	22:27:02	6
2124740	99	35	32,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:42:15	6
2124734	99	35	33,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:38:52	4
2124734	99	35	33,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	23:38:52	4
2124740	99	34	32,2	cyclictest	2701422	-21	kworker/u16:2+events_unbound	23:28:09	6
2124736	99	34	32,2	cyclictest	2580613	-21	kworker/u16:0+events_unbound	22:58:05	5
2124736	99	34	32,2	cyclictest	2519885	-21	kworker/u16:3+flush-8:0	22:47:31	5
2124734	99	34	33,1	cyclictest	2245064	-21	kworker/u16:0+events_unbound	21:23:02	4
2124734	99	34	32,2	cyclictest	2687468	-21	kworker/u16:1+events_unbound	00:02:17	4
2124734	99	34	32,2	cyclictest	2519885	-21	kworker/u16:3+events_unbound	22:32:21	4
2483470	2	33	0,1	chrt	0	-21	swapper/5	21:57:14	5
2124744	99	33	28,4	cyclictest	2677433	-21	latency_hist	23:17:04	7
2124740	99	33	31,2	cyclictest	2361325	-21	kworker/u16:4+events_unbound	21:37:01	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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