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 Jul 13, 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
1191047	2	96	0,1	sleep5	0	-21	swapper/5	11:52:03	5
539652	99	57	52,4	cyclictest	852285	-21	latency_hist	09:39:33	7
539076	2	53	42,8	sleep4	0	-21	swapper/4	07:05:47	4
539652	99	48	45,2	cyclictest	904559	-21	munin-run	09:59:33	7
539652	99	47	44,2	cyclictest	776561	-21	diskmemload	09:22:04	7
539152	2	46	34,8	sleep5	0	-21	swapper/5	07:06:53	5
539639	99	45	43,2	cyclictest	1092981	-21	kworker/u16:2+flush-8:0	11:24:33	4
539639	99	45	43,2	cyclictest	1030694	-21	kworker/u16:4+flush-8:0	11:29:33	4
538187	2	44	2,36	sleep7	0	-21	swapper/7	07:05:02	7
539652	99	42	41,0	cyclictest	0	-21	swapper/7	11:37:08	7
539652	99	41	38,2	cyclictest	878202	-21	ssh	09:49:16	7
539652	99	41	38,2	cyclictest	878202	-21	ssh	09:49:16	7
539652	99	41	35,5	cyclictest	611344	-21	latency_hist	07:44:33	7
539644	99	41	39,2	cyclictest	892618	-21	kworker/u16:0+events_unbound	10:10:57	5
539644	99	41	39,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	10:57:36	5
539644	99	40	38,2	cyclictest	878549	-21	kworker/u16:3+events_unbound	09:53:16	5
539644	99	40	37,2	cyclictest	1229863	-21	kworker/u16:3+events_unbound	12:19:56	5
539652	99	39	38,0	cyclictest	0	-21	swapper/7	11:11:48	7
539644	99	39	37,2	cyclictest	931561	-21	kworker/u16:1+events_unbound	10:18:17	5
539644	99	39	37,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	09:37:05	5
539644	99	39	37,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	09:26:41	5
539644	99	39	37,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	09:55:46	5
539644	99	39	37,2	cyclictest	747793	-21	kworker/u16:3+events_unbound	09:23:16	5
539644	99	39	37,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:43:12	5
539644	99	39	37,2	cyclictest	1030694	-21	kworker/u16:4+events_unbound	11:11:44	5
539644	99	39	37,2	cyclictest	1030694	-21	kworker/u16:4+events_unbound	10:54:20	5
539639	99	39	37,2	cyclictest	892618	-21	kworker/u16:0+flush-8:0	09:59:28	4
539639	99	39	36,2	cyclictest	956042	-21	kworker/u16:3+flush-8:0	10:39:33	4
539652	99	38	36,1	cyclictest	1242092	-21	sh	12:14:28	7
539644	99	38	36,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	10:03:41	5
539639	99	38	36,2	cyclictest	839722	-21	kworker/u16:0+events_unbound	09:48:05	4
539639	99	38	36,2	cyclictest	839722	-21	kworker/u16:0+events_unbound	09:48:05	4
539644	99	37	35,2	cyclictest	931561	-21	kworker/u16:1+events_unbound	10:23:37	5
539644	99	37	35,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	09:48:17	5
539644	99	37	35,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	09:48:17	5
539644	99	37	35,2	cyclictest	800447	-21	kworker/u16:4+events_unbound	09:43:24	5
539644	99	37	35,2	cyclictest	747793	-21	kworker/u16:3+events_unbound	09:33:16	5
539644	99	37	35,2	cyclictest	1279429	-21	kworker/u16:0+events_unbound	12:38:20	5
539644	99	37	35,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:15:56	5
539644	99	37	35,2	cyclictest	1030694	-21	kworker/u16:4+events_unbound	11:08:56	5
539644	99	36	34,2	cyclictest	956042	-21	kworker/u16:3+events_unbound	10:40:32	5
539644	99	36	34,2	cyclictest	931561	-21	kworker/u16:1+events_unbound	10:26:49	5
539644	99	36	34,2	cyclictest	931561	-21	kworker/u16:1+events_unbound	10:26:49	5
539644	99	36	34,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	10:05:52	5
539644	99	36	34,2	cyclictest	747793	-21	kworker/u16:3+events_unbound	09:19:16	5
539644	99	36	34,2	cyclictest	747793	-21	kworker/u16:3+events_unbound	09:12:12	5
539644	99	36	34,2	cyclictest	1202380	-21	kworker/u16:0+events_unbound	12:04:08	5
539644	99	36	34,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:38:56	5
539644	99	36	34,2	cyclictest	1030694	-21	kworker/u16:4+events_unbound	11:33:33	5
539639	99	36	35,1	cyclictest	956042	-21	kworker/u16:3+events_unbound	10:32:00	4
539639	99	36	34,2	cyclictest	956042	-21	kworker/u16:3+events_unbound	10:48:56	4
539164	2	36	24,8	sleep6	0	-21	swapper/6	07:07:02	6
539648	99	35	33,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	12:00:12	6
539644	99	35	33,2	cyclictest	1155157	-21	kworker/u16:2+events_unbound	12:12:52	5
539644	99	35	33,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:25:52	5
539644	99	35	33,2	cyclictest	1030694	-21	kworker/u16:4+events_unbound	11:46:41	5
539644	99	35	33,2	cyclictest	1015594	-21	kworker/u16:1+flush-8:0	10:46:28	5
539639	99	35	33,2	cyclictest	813124	-21	kworker/u16:0+events_unbound	09:24:36	4
539639	99	35	33,2	cyclictest	1155157	-21	kworker/u16:2+events_unbound	12:17:08	4
539639	99	35	33,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	10:57:20	4
539652	99	34	31,2	cyclictest	1040972	-21	ssh	10:50:53	7
539644	99	34	32,2	cyclictest	892618	-21	kworker/u16:0+events_unbound	10:39:12	5
539644	99	34	32,2	cyclictest	1202380	-21	kworker/u16:0+events_unbound	12:08:48	5
539644	99	34	32,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:21:01	5
539644	99	34	32,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	12:34:20	5
539644	99	34	32,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	12:34:20	5
539639	99	34	32,2	cyclictest	1092981	-21	kworker/u16:2+events_unbound	11:17:08	4
539652	99	33	31,1	cyclictest	0	-21	swapper/7	11:00:04	7
539648	99	33	31,2	cyclictest	747793	-21	kworker/u16:3+flush-8:0	09:29:40	6
539644	99	33	31,2	cyclictest	601657	-21	kworker/u16:1+events_unbound	08:27:09	5
539644	99	33	31,2	cyclictest	1155157	-21	kworker/u16:2+events_unbound	12:28:40	5
539644	99	33	31,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:00:41	5
539644	99	33	31,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	11:54:45	5
539639	99	33	31,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	10:26:12	4
539639	99	33	31,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	10:26:12	4
539652	99	32	31,0	cyclictest	0	-21	swapper/7	11:08:01	7
539652	99	32	30,1	cyclictest	0	-21	swapper/7	08:34:52	7
539652	99	32	29,2	cyclictest	954262	-21	ssh	10:17:05	7
539644	99	32	30,2	cyclictest	892618	-21	kworker/u16:0+events_unbound	10:30:12	5
539639	99	32	31,1	cyclictest	839722	-21	kworker/u16:0+events_unbound	09:41:09	4
539639	99	32	30,2	cyclictest	799799	-21	kworker/u16:2+flush-8:0	10:11:13	4
539639	99	32	30,2	cyclictest	709011	-21	kworker/u16:0+flush-8:0	09:14:33	4
539639	99	32	29,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	10:05:00	4
539639	99	32	29,2	cyclictest	1279429	-21	kworker/u16:0+events_unbound	12:34:32	4
539639	99	32	29,2	cyclictest	1279429	-21	kworker/u16:0+events_unbound	12:34:32	4
539639	99	31	29,2	cyclictest	799799	-21	kworker/u16:2+flush-8:0	10:39:53	4
539639	99	31	29,2	cyclictest	1202380	-21	kworker/u16:0+events_unbound	12:07:08	4
539639	99	31	29,2	cyclictest	1053092	-21	kworker/u16:0+flush-8:0	11:34:43	4
539639	99	31	29,2	cyclictest	1015594	-21	kworker/u16:1+events_unbound	11:32:56	4
539652	99	30	29,0	cyclictest	0	-21	swapper/7	11:19:41	7
539652	99	30	29,0	cyclictest	0	-21	swapper/7	08:24:52	7
539652	99	30	29,0	cyclictest	0	-21	swapper/7	07:54:54	7
539652	99	30	28,1	cyclictest	1054626	-21	ssh	10:58:05	7
539648	99	30	28,2	cyclictest	839722	-21	kworker/u16:0+flush-8:0	09:40:15	6
539648	99	30	28,2	cyclictest	1053092	-21	kworker/u16:0+events_unbound	11:29:29	6
539639	99	30	28,2	cyclictest	892618	-21	kworker/u16:0+events_unbound	09:59:37	4
539639	99	30	28,2	cyclictest	799799	-21	kworker/u16:2+events_unbound	09:19:12	4
539652	99	29	28,0	cyclictest	0	-21	swapper/7	09:41:25	7
539652	99	29	28,0	cyclictest	0	-21	swapper/7	09:25:37	7
539652	99	29	28,0	cyclictest	0	-21	swapper/7	09:14:05	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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