OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot2.osadl.org (updated Wed Feb 18, 2026 12:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
642039	99	105	98,5	cyclictest	663630	-21	kworker/u4:15+events_unbound	08:58:23	1
642037	99	92	83,6	cyclictest	704756	-21	kworker/u4:11+events_unbound	10:13:30	0
642037	99	91	79,8	cyclictest	54	-21	kswapd0	11:50:08	0
642037	99	90	74,14	cyclictest	717722	-21	kworker/u4:2+events_unbound	10:03:30	0
642039	99	85	70,6	cyclictest	630635	-21	kworker/u4:2+events_unbound	07:35:02	1
642039	99	82	75,5	cyclictest	639561	-21	kworker/u4:3+events_unbound	07:28:16	1
642037	99	81	49,29	cyclictest	676923	-21	apt-get	09:15:09	0
642039	99	80	73,5	cyclictest	658572	-21	kworker/u4:9+events_unbound	08:18:19	1
642039	99	77	70,5	cyclictest	664884	-21	kworker/u4:16+events_unbound	08:43:21	1
642039	99	75	69,4	cyclictest	630638	-21	kworker/u4:5+events_unbound	07:33:15	1
642039	99	75	68,5	cyclictest	643244	-21	kworker/u4:8+events_unbound	08:23:19	1
642039	99	75	61,6	cyclictest	835965	-21	kworker/u4:8+events_unbound	12:23:46	1
642037	99	75	66,6	cyclictest	725716	-21	kworker/u4:4+events_unbound	10:28:31	0
642039	99	74	67,5	cyclictest	659839	-21	kworker/u4:13+events_unbound	08:48:23	1
642037	99	72	35,34	cyclictest	651157	-21	aten_r7power_vo	07:45:16	0
642037	99	70	5,18	cyclictest	767421	-21	ssh	11:00:33	0
642037	99	70	36,31	cyclictest	667639	-21	latency_hist	08:50:02	0
642037	99	69	35,31	cyclictest	707821	-21	/usr/sbin/munin	09:50:35	0
642037	99	69	29,37	cyclictest	754825	-21	switchtime	10:45:39	0
642037	99	69	28,36	cyclictest	0	-21	swapper/0	09:45:01	0
642037	99	68	61,4	cyclictest	54	-21	kswapd0	09:45:07	0
642037	99	68	32,30	cyclictest	0	-21	swapper/0	08:20:00	0
642037	99	68	20,45	cyclictest	728318	-21	aten_r7power_en	10:15:18	0
642037	99	68	16,48	cyclictest	693944	-21	latency_hist	09:35:01	0
642037	99	67	50,10	cyclictest	836574	-21	kworker/u4:9-rpciod	12:26:35	0
642037	99	67	3,21	cyclictest	826608	-21	ssh	12:10:27	0
642037	99	67	31,33	cyclictest	0	-21	swapper/0	07:35:34	0
642037	99	67	29,35	cyclictest	0	-21	swapper/0	11:45:34	0
642037	99	67	27,37	cyclictest	657146	-21	timerwakeupswit	08:05:36	0
642037	99	66	3,14	cyclictest	830752	-21	ssh	12:15:27	0
642037	99	66	30,33	cyclictest	798773	-21	kworker/u4:9+rpciod	11:55:39	0
642037	99	66	30,33	cyclictest	758903	-21	diskmemload	10:50:34	0
642037	99	66	28,35	cyclictest	0	-21	swapper/0	07:25:25	0
642037	99	66	27,36	cyclictest	0	-21	swapper/0	09:05:16	0
642037	99	66	26,4	cyclictest	0	-21	swapper/0	08:40:33	0
642037	99	65	32,29	cyclictest	0	-21	swapper/0	11:35:15	0
642037	99	65	29,32	cyclictest	0	-21	swapper/0	11:10:27	0
642037	99	65	28,32	cyclictest	0	-21	swapper/0	09:25:39	0
642037	99	65	21,41	cyclictest	0	-21	swapper/0	10:05:19	0
642037	99	64	33,28	cyclictest	712353	-21	timerwakeupswit	09:55:40	0
642037	99	64	30,31	cyclictest	674629	-21	sh	09:11:22	0
642037	99	64	30,30	cyclictest	0	-21	swapper/0	11:30:27	0
642037	99	64	29,32	cyclictest	0	-21	swapper/0	10:20:26	0
642037	99	64	27,35	cyclictest	817570	-21	aten2__	12:00:15	0
642037	99	64	27,33	cyclictest	0	-21	swapper/0	12:20:36	0
642037	99	64	27,33	cyclictest	0	-21	swapper/0	11:15:29	0
642037	99	64	26,33	cyclictest	0	-21	swapper/0	08:20:23	0
642037	99	63	30,30	cyclictest	0	-21	swapper/0	12:35:27	0
642037	99	63	27,34	cyclictest	746293	-21	timerandwakeup	10:35:37	0
642037	99	63	26,4	cyclictest	0	-21	swapper/0	09:20:25	0
642037	99	63	23,8	cyclictest	762843	-21	uname	10:55:22	0
642037	99	62	30,30	cyclictest	822898	-21	grep	12:05:37	0
642037	99	62	27,32	cyclictest	0	-21	swapper/0	11:25:34	0
642037	99	62	26,33	cyclictest	0	-21	swapper/0	09:35:35	0
642037	99	62	25,34	cyclictest	0	-21	swapper/0	07:10:21	0
642037	99	62	24,34	cyclictest	798159	-21	kworker/u4:6-xprtiod	11:42:10	0
642037	99	62	22,6	cyclictest	0	-21	swapper/0	07:30:20	0
642039	99	61	51,7	cyclictest	707058	-21	aten_r7power_en	09:50:16	1
642037	99	61	31,27	cyclictest	0	-21	swapper/0	10:40:28	0
642037	99	61	26,5	cyclictest	741907	-21	ssh	10:30:35	0
642037	99	61	24,6	cyclictest	770878	-21	aten2__	11:05:15	0
642037	99	61	22,5	cyclictest	663905	-21	aten_r7power_en	08:35:16	0
642037	99	61	18,38	cyclictest	0	-21	swapper/0	11:25:01	0
642037	99	60	51,7	cyclictest	656065	-21	systemd	08:03:16	0
642037	99	60	26,9	cyclictest	0	-21	swapper/0	07:50:11	0
642037	99	60	26,31	cyclictest	0	-21	swapper/0	09:05:00	0
642037	99	60	23,7	cyclictest	0	-21	swapper/0	08:30:02	0
642039	99	58	6,45	cyclictest	732486	-21	ssh	10:20:14	1
642039	99	58	51,5	cyclictest	790126	-21	kworker/u4:11+events_unbound	11:30:22	1
642039	99	58	44,6	cyclictest	663630	-21	kworker/u4:15+events_unbound	09:06:44	1
642037	99	58	29,27	cyclictest	0	-21	swapper/0	08:00:01	0
642039	99	57	43,6	cyclictest	848678	-21	kworker/u4:12+events_unbound	12:39:26	1
642037	99	57	24,4	cyclictest	0	-21	swapper/0	12:32:06	0
642037	99	56	23,5	cyclictest	643249	-21	kworker/u4:12-nfsiod	07:15:31	0
642039	99	55	48,5	cyclictest	657314	-21	kworker/u4:0+events_unbound	08:12:05	1
642039	99	55	48,5	cyclictest	642035	-21	cyclictest	10:51:38	1
642039	99	55	47,5	cyclictest	796397	-21	/usr/sbin/munin	11:35:13	1
642037	99	55	33,19	cyclictest	650052	-21	fschecks_count	07:40:18	0
642039	99	54	47,5	cyclictest	692435	-21	kworker/u4:4+events_unbound	09:32:59	1
642039	99	54	40,7	cyclictest	630638	-21	kworker/u4:5+events_unbound	07:22:01	1
642037	99	54	36,6	cyclictest	0	-21	swapper/0	08:50:11	0
642039	99	53	7,41	cyclictest	775816	-21	ssh	11:10:26	1
642039	99	53	45,5	cyclictest	756038	-21	kworker/u4:0+events_unbound	10:48:33	1
642039	99	53	44,6	cyclictest	699021	-21	cat	09:40:20	1
642039	99	52	47,4	cyclictest	658574	-21	kworker/u4:12+events_unbound	09:26:59	1
642039	99	52	38,6	cyclictest	772791	-21	kworker/u4:13+events_unbound	11:07:33	1
642039	99	52	11,37	cyclictest	822471	-21	ssh	12:05:30	1
642039	99	51	44,5	cyclictest	804920	-21	aten2__	11:45:18	1
642039	99	51	44,5	cyclictest	783338	-21	munin-run	11:20:01	1
642039	99	51	44,5	cyclictest	715926	-21	gltestperf	10:00:21	1
642039	99	51	44,5	cyclictest	643244	-21	kworker/u4:8+events_unbound	08:25:02	1
642039	99	50	45,4	cyclictest	781454	-21	kworker/u4:6+events_unbound	11:22:00	1
642039	99	49	43,5	cyclictest	713389	-21	kworker/u4:10+events_unbound	09:57:17	1
642039	99	49	40,7	cyclictest	706659	-21	munin-run	09:50:00	1
642039	99	49	39,6	cyclictest	0	-21	swapper/1	12:30:33	1
642039	99	49	31,14	cyclictest	713389	-21	kworker/u4:10+events_unbound	10:25:33	1
642037	99	49	40,7	cyclictest	640775	-21	kworker/u4:4+events_unbound	08:15:01	0
642039	99	48	36,8	cyclictest	0	-21	swapper/1	12:00:31	1
642039	99	48	27,18	cyclictest	27	1	ktimers/1	11:50:20	1
642039	99	47	41,4	cyclictest	631893	-21	kworker/u4:11+events_unbound	07:20:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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