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 792 highest latencies:

System rack7slot2.osadl.org (updated Fri Jul 17, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4150499	99	112	103,7	cyclictest	115405	-21	kworker/u4:14+events_unbound	23:32:56	1
4150499	99	99	92,5	cyclictest	71359	-21	kworker/u4:0+events_unbound	22:52:51	1
4150499	99	87	80,5	cyclictest	4141812	-21	kworker/u4:4+events_unbound	19:22:12	1
4150499	99	86	77,7	cyclictest	4167154	-21	kworker/u4:4+events_unbound	21:17:35	1
4150499	99	85	77,5	cyclictest	93381	-21	kworker/u4:4+events_unbound	23:52:58	1
4150499	99	84	77,5	cyclictest	62243	-21	kworker/u4:6+events_unbound	22:32:49	1
4150499	99	83	77,5	cyclictest	4163316	-21	kworker/u4:13+events_unbound	21:12:34	1
4150499	99	83	76,5	cyclictest	4179926	-21	kworker/u4:3+events_unbound	21:22:36	1
4150499	99	82	75,5	cyclictest	147217	-21	kworker/u4:9+events_unbound	00:08:02	1
4150498	99	81	37,41	cyclictest	20173	-21	ssh	21:45:30	0
4150499	99	80	73,5	cyclictest	57707	-21	kworker/u4:2+events_unbound	22:27:47	1
4150498	99	80	55,20	cyclictest	53	-21	kswapd0	00:05:07	0
4150498	99	80	36,41	cyclictest	171896	-21	grep	00:35:19	0
4150499	99	77	69,6	cyclictest	4127597	-21	kworker/u4:12+events_unbound	20:22:24	1
4150499	99	75	67,6	cyclictest	88844	-21	kworker/u4:3+events_unbound	23:02:54	1
4150498	99	74	38,31	cyclictest	256	50	irq/23-42890000.ethernet	00:20:28	0
4150499	99	73	66,5	cyclictest	4150427	-21	kworker/u4:9+events_unbound	19:37:14	1
4150498	99	73	42,29	cyclictest	4179834	-21	unixbench_multi	21:00:39	0
4150498	99	73	40,29	cyclictest	4181590	-21	sh	21:10:09	0
4150498	99	72	38,31	cyclictest	74254	-21	ssh	22:45:40	0
4150498	99	71	22,47	cyclictest	0	-21	swapper/0	20:15:18	0
4150498	99	70	33,28	cyclictest	1130	-21	apt-get	21:25:06	0
4150499	99	69	56,5	cyclictest	4169728	-21	kworker/u4:0+events_unbound	21:00:01	1
4150498	99	69	35,31	cyclictest	131022	-21	latency_hist	23:50:01	0
4150498	99	69	28,38	cyclictest	0	-21	swapper/0	22:40:32	0
4150498	99	69	1,20	cyclictest	82126	-21	ssh	22:55:13	0
4150498	99	68	56,7	cyclictest	24255	-21	fschecks_count	21:50:19	0
4150498	99	68	32,32	cyclictest	256	50	irq/23-42890000.ethernet	23:50:09	0
4150498	99	68	1,20	cyclictest	28440	-21	ssh	21:55:16	0
4150498	99	67	4,18	cyclictest	150065	-21	ntpq	00:10:37	0
4150498	99	67	1,20	cyclictest	64975	-21	ssh	22:35:27	0
4150498	99	66	48,14	cyclictest	53	-21	kswapd0	22:10:11	0
4150498	99	66	4,23	cyclictest	139905	-21	idleruntime-cro	00:00:01	0
4150498	99	66	29,34	cyclictest	122706	-21	ls	23:40:20	0
4150498	99	66	29,33	cyclictest	0	-21	swapper/0	20:05:27	0
4150499	99	65	57,6	cyclictest	4169729	-21	kworker/u4:5+events_unbound	20:37:27	1
4150498	99	65	3,16	cyclictest	154328	-21	ntpq	00:15:29	0
4150498	99	65	30,32	cyclictest	0	-21	swapper/0	00:25:28	0
4150498	99	65	29,33	cyclictest	0	-21	swapper/0	23:15:36	0
4150498	99	65	27,34	cyclictest	0	-21	swapper/0	23:35:39	0
4150498	99	65	27,34	cyclictest	0	-21	swapper/0	20:35:28	0
4150498	99	65	25,37	cyclictest	0	-21	swapper/0	21:40:35	0
4150498	99	65	16,8	cyclictest	0	-21	swapper/0	19:15:27	0
4150499	99	64	55,7	cyclictest	93383	-21	kworker/u4:10+events_unbound	23:22:56	1
4150498	99	64	55,6	cyclictest	88844	-21	kworker/u4:3+events_unbound	23:07:51	0
4150498	99	64	30,31	cyclictest	4155485	-21	unixbench_multi	19:25:38	0
4150499	99	63	55,6	cyclictest	4167154	-21	kworker/u4:4+events_unbound	20:17:23	1
4150499	99	63	50,6	cyclictest	4160776	-21	kworker/u4:9+events_unbound	19:55:00	1
4150498	99	63	4,21	cyclictest	167701	-21	ntpq	00:30:25	0
4150498	99	63	30,29	cyclictest	4167154	-21	kworker/u4:4-rpciod	21:20:02	0
4150498	99	63	27,33	cyclictest	0	-21	swapper/0	22:05:21	0
4150498	99	63	26,33	cyclictest	0	-21	swapper/0	19:35:24	0
4150499	99	62	54,6	cyclictest	138107	-21	kworker/u4:10+events_unbound	00:00:00	1
4150499	99	62	53,7	cyclictest	4149217	-21	kworker/u4:1+events_unbound	20:27:24	1
4150498	99	62	54,5	cyclictest	4127597	-21	kworker/u4:12+events_unbound	20:55:00	0
4150498	99	62	27,32	cyclictest	0	-21	swapper/0	21:05:10	0
4150498	99	62	26,32	cyclictest	0	-21	swapper/0	21:30:32	0
4150498	99	62	2,20	cyclictest	4167165	-21	modprobe	20:15:00	0
4150498	99	62	20,5	cyclictest	0	-21	swapper/0	19:50:36	0
4150498	99	62	18,6	cyclictest	53	-21	kswapd0	23:00:14	0
4150499	99	61	54,5	cyclictest	4147984	-21	kworker/u4:0+events_unbound	19:42:15	1
4150499	99	61	53,6	cyclictest	4154309	-21	kworker/u4:18+events_unbound	19:57:18	1
4150499	99	61	42,5	cyclictest	71359	-21	kworker/u4:0+events_unbound	22:55:44	1
4150498	99	61	47,11	cyclictest	59584	-21	latency_hist	22:30:01	0
4150498	99	61	31,26	cyclictest	4167154	-21	kworker/u4:4-rpciod	21:20:39	0
4150498	99	61	30,28	cyclictest	0	-21	swapper/0	21:36:19	0
4150498	99	61	28,30	cyclictest	0	-21	swapper/0	23:10:13	0
4150498	99	61	26,31	cyclictest	0	-21	swapper/0	22:30:25	0
4150498	99	61	25,32	cyclictest	138103	-21	kworker/u4:0-rpciod	00:00:36	0
4150498	99	61	22,4	cyclictest	256	50	irq/23-42890000.ethernet	20:20:18	0
4150498	99	61	1,13	cyclictest	117544	-21	awk	23:35:00	0
4150499	99	60	46,4	cyclictest	4163317	-21	kworker/u4:15+events_unbound	21:05:01	1
4150498	99	60	6,51	cyclictest	4181329	-21	diskmemload	22:20:28	0
4150498	99	60	4,16	cyclictest	33616	-21	ntpq	22:00:28	0
4150498	99	60	24,32	cyclictest	0	-21	swapper/0	20:40:15	0
4150499	99	59	48,8	cyclictest	25790	-21	kworker/u4:12+events_unbound	22:10:05	1
4150499	99	59	46,5	cyclictest	4163317	-21	kworker/u4:15+events_unbound	20:07:21	1
4150499	99	59	41,5	cyclictest	93381	-21	kworker/u4:4+events_unbound	23:40:02	1
4150498	99	59	28,27	cyclictest	4141812	-21	kworker/u4:4-rpciod	19:30:37	0
4150498	99	59	27,29	cyclictest	109125	-21	grep	23:25:20	0
4150498	99	59	24,32	cyclictest	0	-21	swapper/0	20:45:16	0
4150499	99	58	50,6	cyclictest	0	-21	swapper/1	21:45:14	1
4150498	99	58	30,24	cyclictest	4160772	-21	kworker/u4:4-rpciod	19:55:36	0
4150499	99	57	50,5	cyclictest	4179926	-21	kworker/u4:3+events_unbound	21:07:31	1
4150498	99	57	7,13	cyclictest	105063	-21	/usr/sbin/munin	23:20:21	0
4150498	99	57	25,29	cyclictest	0	-21	swapper/0	19:45:00	0
4150498	99	57	24,28	cyclictest	0	-21	swapper/0	22:55:01	0
4150498	99	57	21,5	cyclictest	4150495	-21	cyclictest	20:00:27	0
4150498	99	57	21,4	cyclictest	0	-21	swapper/0	19:10:34	0
4150499	99	56	49,5	cyclictest	4127597	-21	kworker/u4:12+events_unbound	19:27:14	1
4150499	99	56	45,6	cyclictest	24029	-21	/usr/sbin/munin	21:50:16	1
4150498	99	55	21,4	cyclictest	0	-21	swapper/0	19:20:25	0
4150499	99	54	47,5	cyclictest	39467	-21	kworker/u4:17+events_unbound	22:10:01	1
4150499	99	54	45,7	cyclictest	62243	-21	kworker/u4:6+events_unbound	22:40:37	1
4150499	99	54	38,9	cyclictest	4173536	-21	kworker/u4:7+events_unbound	20:40:25	1
4150498	99	54	3,21	cyclictest	4178618	-21	users	20:55:39	0
4150498	99	54	19,5	cyclictest	0	-21	swapper/0	20:30:39	0
4150498	99	53	23,4	cyclictest	0	-21	swapper/0	22:15:12	0
4150499	99	52	45,5	cyclictest	12729	-21	kworker/u4:5+events_unbound	21:40:01	1
4150499	99	52	43,7	cyclictest	4160761	-21	systemd	19:47:16	1
4150499	99	51	45,5	cyclictest	147215	-21	kworker/u4:6+events_unbound	00:30:03	1
4150499	99	51	44,5	cyclictest	4156751	-21	unixbench_multi	19:30:38	1
4150499	99	51	43,6	cyclictest	93381	-21	kworker/u4:4+events_unbound	23:47:57	1
4150499	99	51	40,5	cyclictest	48580	-21	kworker/u4:5+events_unbound	22:50:02	1
4150499	99	51	36,6	cyclictest	138107	-21	kworker/u4:10+events_unbound	00:14:28	1
4150499	99	50	44,4	cyclictest	21876	-21	kworker/u4:6+events_unbound	21:55:19	1
4150499	99	50	43,5	cyclictest	93384	-21	kworker/u4:11+events_unbound	23:11:44	1
4150499	99	50	43,5	cyclictest	6057	-21	aten_r7power_po	21:30:17	1
4150499	99	50	42,6	cyclictest	4147984	-21	kworker/u4:0+events_unbound	19:12:11	1
4150499	99	50	38,8	cyclictest	0	-21	swapper/1	23:25:37	1
4150499	99	49	41,6	cyclictest	44021	-21	kworker/u4:20+events_unbound	22:35:21	1
4150499	99	48	42,4	cyclictest	33021	-21	aten_r7power_po	22:00:16	1
4150499	99	48	41,5	cyclictest	93384	-21	kworker/u4:11+events_unbound	23:16:46	1
4150499	99	48	37,6	cyclictest	0	-21	swapper/1	23:05:36	1
4150499	99	47	38,7	cyclictest	119106	-21	unixbench_multi	23:35:40	1
4150499	99	46	40,4	cyclictest	4167145	-21	systemd	20:12:19	1
4150499	99	46	39,5	cyclictest	4156847	-21	kworker/u4:3+events_unbound	20:00:31	1
4150499	99	46	39,5	cyclictest	172181	-21	ntp_kernel_err	00:35:26	1
4150499	99	46	39,5	cyclictest	154109	-21	gltestperf	00:15:24	1
4150499	99	46	37,7	cyclictest	1938	-21	gltestperf	21:25:25	1
4150499	99	46	36,7	cyclictest	0	-21	swapper/1	00:20:38	1
4150499	99	46	36,6	cyclictest	147215	-21	kworker/u4:6-rpciod	00:26:11	1
4150499	99	45	36,7	cyclictest	141408	-21	timerandwakeup	00:00:46	1
4150499	99	45	35,8	cyclictest	46575	-21	cpu	22:15:24	1
4150499	99	43	36,4	cyclictest	55011	-21	latency_hist	22:25:01	1
4150499	99	43	35,6	cyclictest	4171474	-21	fschecks_count	20:30:21	1
4150499	99	43	31,8	cyclictest	4175722	-21	ps	20:45:37	1
4150498	99	43	36,5	cyclictest	4160545	-21	timerandwakeup	19:45:38	0
4150499	99	42	34,6	cyclictest	11415	-21	diskmemload	21:35:38	1
4150499	99	42	33,6	cyclictest	0	-21	swapper/1	20:55:02	1
4150498	99	42	31,7	cyclictest	0	-21	swapper/0	20:25:39	0
4150499	99	40	34,4	cyclictest	4153020	-21	cron	19:20:00	1
4150499	99	34	25,6	cyclictest	0	-21	swapper/1	19:10:01	1
4150498	99	34	12,13	cyclictest	4150427	-21	kworker/u4:9-rpciod	19:10:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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