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 Sat Aug 15, 2026 00:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
865262	99	99	91,6	cyclictest	1037153	-21	kworker/u4:3+events_unbound	00:18:31	0
865262	99	95	88,5	cyclictest	1028124	-21	kworker/u4:15+events_unbound	23:42:42	0
865262	99	93	85,5	cyclictest	1019078	-21	kworker/u4:12+events_unbound	23:32:40	0
865262	99	91	83,6	cyclictest	938934	-21	kworker/u4:0+events_unbound	22:27:31	0
865262	99	88	80,6	cyclictest	872964	-21	kworker/u4:11+events_unbound	19:36:52	0
865262	99	85	77,6	cyclictest	1050000	-21	kworker/u4:10+events_unbound	00:03:25	0
865262	99	85	76,7	cyclictest	876810	-21	kworker/u4:6+events_unbound	20:27:03	0
865262	99	82	67,6	cyclictest	1028124	-21	kworker/u4:15+events_unbound	23:46:55	0
865263	99	76	48,25	cyclictest	881752	-21	timerwakeupswit	20:10:38	1
865262	99	74	67,5	cyclictest	862581	-21	kworker/u4:4+events_unbound	19:31:54	0
865262	99	74	66,6	cyclictest	970698	-21	kworker/u4:9+events_unbound	22:42:33	0
865262	99	73	66,5	cyclictest	869164	-21	kworker/u4:15+events_unbound	20:37:04	0
865263	99	72	5,19	cyclictest	37	-21	kcompactd0	23:55:20	1
865263	99	72	42,28	cyclictest	1022652	-21	timerwakeupswit	23:30:38	1
865262	99	70	63,5	cyclictest	1001652	-21	kworker/u4:9+events_unbound	23:22:38	0
865263	99	69	34,32	cyclictest	0	-21	swapper/1	21:35:35	1
865263	99	69	34,31	cyclictest	0	-21	swapper/1	20:55:37	1
865262	99	69	61,6	cyclictest	896050	-21	kworker/u4:13+events_unbound	21:07:10	0
865263	99	68	31,33	cyclictest	0	-21	swapper/1	22:50:33	1
865263	99	68	31,33	cyclictest	0	-21	swapper/1	00:25:27	1
865262	99	68	60,6	cyclictest	867846	-21	kworker/u4:9+events_unbound	19:21:50	0
865263	99	67	58,7	cyclictest	907661	-21	kworker/u4:6+events_unbound	21:22:13	1
865263	99	67	29,35	cyclictest	0	-21	swapper/1	21:55:26	1
865263	99	67	29,35	cyclictest	0	-21	swapper/1	00:30:17	1
865263	99	66	36,27	cyclictest	1039408	-21	aten_r7power_po	23:50:16	1
865263	99	66	34,30	cyclictest	1004759	-21	sendmail_mailtr	23:10:40	1
865263	99	66	34,29	cyclictest	895718	-21	sendmail_mailqu	21:05:36	1
865263	99	66	31,32	cyclictest	1083592	-21	latency_hist	00:40:01	1
865263	99	66	28,35	cyclictest	0	-21	swapper/1	21:30:17	1
865263	99	66	27,5	cyclictest	0	-21	swapper/1	19:30:28	1
865263	99	66	27,37	cyclictest	1048509	-21	fschecks_count	00:00:23	1
865263	99	66	27,36	cyclictest	0	-21	swapper/1	20:20:19	1
865263	99	65	34,27	cyclictest	991402	-21	ssh	22:55:38	1
865263	99	65	32,29	cyclictest	0	-21	swapper/1	22:00:25	1
865263	99	65	30,29	cyclictest	975143	-21	kworker/u4:2-rpciod	22:50:02	1
865263	99	65	29,33	cyclictest	0	-21	swapper/1	20:20:00	1
865263	99	64	33,27	cyclictest	1053899	-21	unixbench_singl	00:05:41	1
865263	99	64	33,27	cyclictest	1053899	-21	unixbench_singl	00:05:41	1
865263	99	64	32,30	cyclictest	1008552	-21	gltestperf	23:15:18	1
865263	99	64	3,22	cyclictest	1057824	-21	ntpq	00:10:29	1
865263	99	64	3,22	cyclictest	1057824	-21	ntpq	00:10:29	1
865263	99	64	31,30	cyclictest	0	-21	swapper/1	00:15:25	1
865263	99	64	30,31	cyclictest	0	-21	swapper/1	22:40:27	1
865263	99	64	29,4	cyclictest	901339	-21	gltestperf	21:15:21	1
865263	99	64	28,33	cyclictest	0	-21	swapper/1	23:25:02	1
865263	99	64	27,4	cyclictest	0	-21	swapper/1	23:35:16	1
865263	99	63	30,31	cyclictest	875447	-21	unixbench_multi	19:45:35	1
865263	99	63	30,31	cyclictest	0	-21	swapper/1	22:05:30	1
865263	99	63	28,4	cyclictest	0	-21	swapper/1	23:05:26	1
865263	99	63	28,32	cyclictest	0	-21	swapper/1	21:40:32	1
865263	99	63	26,7	cyclictest	988029	-21	kworker/u4:19-rpciod	23:00:31	1
865263	99	63	25,8	cyclictest	378	-21	dbus-daemon	22:37:31	1
865262	99	63	1,43	cyclictest	928662	-21	ssh	21:45:27	0
865263	99	62	30,28	cyclictest	947978	-21	kworker/u4:2-rpciod	22:15:21	1
865263	99	62	28,5	cyclictest	0	-21	swapper/1	22:10:28	1
865263	99	62	27,6	cyclictest	0	-21	swapper/1	22:20:19	1
865263	99	62	27,6	cyclictest	0	-21	swapper/1	20:25:19	1
865263	99	62	24,8	cyclictest	878090	-21	cron	20:00:00	1
865263	99	61	29,4	cyclictest	0	-21	swapper/1	22:30:34	1
865263	99	61	28,6	cyclictest	0	-21	swapper/1	19:40:38	1
865263	99	61	28,29	cyclictest	0	-21	swapper/1	21:10:26	1
865263	99	61	27,7	cyclictest	1070259	-21	apt-config	00:25:01	1
865263	99	61	27,4	cyclictest	0	-21	swapper/1	21:50:24	1
865263	99	61	25,6	cyclictest	0	-21	swapper/1	23:25:31	1
865263	99	61	24,7	cyclictest	0	-21	swapper/1	21:25:22	1
865263	99	61	24,6	cyclictest	0	-21	swapper/1	21:45:25	1
865262	99	61	54,5	cyclictest	960945	-21	kworker/u4:6+events_unbound	22:55:01	0
865262	99	61	54,5	cyclictest	880638	-21	kworker/u4:12+events_unbound	20:52:05	0
865262	99	61	53,6	cyclictest	887109	-21	kworker/u4:11+events_unbound	20:57:06	0
865262	99	61	47,7	cyclictest	992567	-21	kworker/u4:4+events_unbound	23:25:46	0
865263	99	60	23,8	cyclictest	0	-21	swapper/1	19:15:31	1
865263	99	59	47,8	cyclictest	37	-21	kcompactd0	23:45:36	1
865263	99	59	26,5	cyclictest	0	-21	swapper/1	19:25:23	1
865262	99	59	52,5	cyclictest	879368	-21	kworker/u4:10+events_unbound	20:17:02	0
865262	99	59	51,6	cyclictest	896050	-21	kworker/u4:13+events_unbound	21:13:45	0
865262	99	59	49,8	cyclictest	0	-21	swapper/0	21:30:09	0
865263	99	57	49,5	cyclictest	875529	-21	kworker/u4:0+events_unbound	20:50:01	1
865263	99	57	26,6	cyclictest	0	-21	swapper/1	19:50:35	1
865263	99	56	21,8	cyclictest	0	-21	swapper/1	20:50:35	1
865262	99	56	51,3	cyclictest	0	-21	swapper/0	21:25:24	0
865262	99	56	43,6	cyclictest	1001652	-21	kworker/u4:9+events_unbound	23:10:02	0
865263	99	55	28,5	cyclictest	0	-21	swapper/1	20:35:22	1
865262	99	55	42,7	cyclictest	970700	-21	kworker/u4:11+events_unbound	22:34:44	0
865262	99	55	40,9	cyclictest	1028124	-21	kworker/u4:15-rpciod	23:39:26	0
865262	99	54	47,5	cyclictest	1041669	-21	kworker/u4:4+events_unbound	23:55:14	0
865262	99	54	38,6	cyclictest	960945	-21	kworker/u4:6+events_unbound	23:05:46	0
865262	99	54	38,12	cyclictest	954012	-21	ssh	22:14:26	0
865262	99	54	31,18	cyclictest	0	-21	swapper/0	00:25:11	0
865262	99	52	46,4	cyclictest	988029	-21	kworker/u4:19+events_unbound	23:00:02	0
865262	99	52	39,7	cyclictest	256	50	irq/23-42890000.ethernet	00:10:32	0
865262	99	52	39,7	cyclictest	256	50	irq/23-42890000.ethernet	00:10:32	0
865262	99	51	42,7	cyclictest	862581	-21	kworker/u4:4-rpciod	21:15:20	0
865262	99	51	39,7	cyclictest	975142	-21	kworker/u4:0-rpciod	22:45:16	0
865262	99	51	37,6	cyclictest	957050	-21	kworker/u4:5+events_unbound	22:17:16	0
865262	99	51	32,17	cyclictest	0	-21	swapper/0	23:50:25	0
865263	99	50	43,5	cyclictest	866485	-21	kworker/u4:5+events_unbound	19:11:47	1
865263	99	50	42,6	cyclictest	879368	-21	kworker/u4:10+events_unbound	21:02:07	1
865263	99	49	42,5	cyclictest	889714	-21	latency_hist	20:45:00	1
865262	99	49	38,8	cyclictest	920362	-21	unixbench_multi	21:35:45	0
865262	99	49	37,7	cyclictest	0	-21	swapper/0	22:20:24	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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