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 all highest latencies:

System rack7slot2.osadl.org (updated Mon Apr 27, 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
1720380	99	96	72,21	cyclictest	53	-21	kswapd0	00:05:10	0
1720380	99	80	72,6	cyclictest	1850143	-21	kworker/u4:13+events_unbound	23:22:19	0
1720380	99	77	43,31	cyclictest	1884934	-21	kworker/u4:2-rpciod	23:45:15	0
1720381	99	75	3,20	cyclictest	1834866	-21	ssh	22:45:15	1
1720380	99	74	66,6	cyclictest	1924150	-21	kworker/u4:0+events_unbound	00:28:38	0
1720380	99	74	65,6	cyclictest	1893815	-21	kworker/u4:11+events_unbound	23:52:15	0
1720380	99	74	26,8	cyclictest	0	-21	swapper/0	22:05:38	0
1720380	99	74	26,8	cyclictest	0	-21	swapper/0	22:05:38	0
1720380	99	72	6,17	cyclictest	1726941	-21	modprobe	19:35:00	0
1720380	99	72	26,43	cyclictest	0	-21	swapper/0	23:25:21	0
1720381	99	71	38,30	cyclictest	1874426	-21	fschecks_time	23:30:19	1
1720380	99	71	63,6	cyclictest	1758203	-21	kworker/u4:4+events_unbound	21:16:55	0
1720380	99	71	28,5	cyclictest	0	-21	swapper/0	22:30:03	0
1720381	99	70	35,32	cyclictest	1792368	-21	switchtime	21:55:41	1
1720381	99	70	33,33	cyclictest	0	-21	swapper/1	00:10:23	1
1720381	99	69	44,23	cyclictest	1861317	-21	cut	23:15:22	1
1720381	99	68	36,29	cyclictest	0	-21	swapper/1	19:55:02	1
1720381	99	68	33,31	cyclictest	0	-21	swapper/1	00:05:31	1
1720380	99	68	59,7	cyclictest	1742421	-21	kworker/u4:14+events_unbound	21:21:57	0
1720380	99	68	36,5	cyclictest	1830910	-21	fschecks_time	22:40:20	0
1720381	99	67	32,31	cyclictest	0	-21	swapper/1	21:40:15	1
1720380	99	67	34,5	cyclictest	1731066	-21	aten2__	19:50:17	0
1720380	99	67	32,7	cyclictest	37	-21	kcompactd0	21:52:16	0
1720381	99	66	37,27	cyclictest	1887269	-21	aten_r7power_en	23:45:16	1
1720380	99	66	38,26	cyclictest	1722041	-21	fschecks_count	19:15:19	0
1720380	99	66	32,5	cyclictest	1817455	-21	acpi	22:25:11	0
1720380	99	66	25,38	cyclictest	0	-21	swapper/0	23:13:39	0
1720381	99	65	56,7	cyclictest	1823616	-21	kworker/u4:14+events_unbound	22:37:10	1
1720381	99	65	35,28	cyclictest	1720378	-21	cyclictest	22:40:28	1
1720381	99	65	32,31	cyclictest	1901571	-21	unixbench-2d	00:00:43	1
1720380	99	65	34,5	cyclictest	1796725	-21	switchtime	22:00:38	0
1720380	99	65	30,6	cyclictest	0	-21	swapper/0	23:17:16	0
1720381	99	64	39,23	cyclictest	1843214	-21	cron	22:54:59	1
1720381	99	64	33,27	cyclictest	0	-21	swapper/1	22:25:01	1
1720381	99	64	3,17	cyclictest	1844387	-21	ntpq	22:55:35	1
1720381	99	64	31,30	cyclictest	0	-21	swapper/1	23:50:16	1
1720381	99	64	30,31	cyclictest	1879024	-21	netstat	23:35:22	1
1720380	99	64	6,23	cyclictest	1770147	-21	ssh	21:30:30	0
1720380	99	64	56,6	cyclictest	1776120	-21	kworker/u4:6+events_unbound	21:55:22	0
1720380	99	64	32,5	cyclictest	1927594	-21	timerwakeupswit	00:30:45	0
1720381	99	63	3,23	cyclictest	1770145	-21	ntpq	21:30:31	1
1720381	99	63	32,29	cyclictest	1849018	-21	sh	23:00:38	1
1720380	99	63	54,7	cyclictest	1841254	-21	kworker/u4:6+events_unbound	22:52:14	0
1720380	99	63	3,19	cyclictest	1848653	-21	sh	23:00:27	0
1720380	99	63	30,8	cyclictest	1913688	-21	fschecks_count	00:15:20	0
1720381	99	62	33,26	cyclictest	1922506	-21	ssh	00:25:22	1
1720381	99	62	3,12	cyclictest	1726938	-21	modprobe	19:35:00	1
1720381	99	62	31,27	cyclictest	0	-21	swapper/1	21:45:28	1
1720381	99	62	30,29	cyclictest	0	-21	swapper/1	23:55:25	1
1720381	99	62	27,31	cyclictest	0	-21	swapper/1	22:25:32	1
1720381	99	62	26,33	cyclictest	0	-21	swapper/1	21:15:13	1
1720380	99	62	6,17	cyclictest	1812082	-21	ssh	22:18:52	0
1720380	99	62	54,6	cyclictest	1729481	-21	kworker/u4:11+events_unbound	19:46:38	0
1720380	99	62	30,5	cyclictest	0	-21	swapper/0	00:20:12	0
1720381	99	61	3,12	cyclictest	1796504	-21	ntpq	22:00:35	1
1720381	99	61	31,27	cyclictest	0	-21	swapper/1	23:10:36	1
1720381	99	61	29,29	cyclictest	0	-21	swapper/1	21:10:21	1
1720381	99	61	28,30	cyclictest	0	-21	swapper/1	23:40:22	1
1720381	99	61	27,31	cyclictest	0	-21	swapper/1	20:15:26	1
1720381	99	61	24,34	cyclictest	0	-21	swapper/1	21:25:13	1
1720380	99	61	32,7	cyclictest	1784847	-21	ssh	21:47:12	0
1720381	99	60	28,30	cyclictest	1735701	-21	sendmail_mailqu	20:05:36	1
1720381	99	60	28,29	cyclictest	1934772	-21	sendmail	00:39:59	1
1720381	99	60	28,29	cyclictest	0	-21	swapper/1	23:25:32	1
1720381	99	60	28,28	cyclictest	0	-21	swapper/1	22:15:01	1
1720381	99	60	12,8	cyclictest	1751403	-21	diskmemload	22:15:34	1
1720380	99	60	52,6	cyclictest	1776118	-21	kworker/u4:4+events_unbound	21:42:02	0
1720381	99	59	50,6	cyclictest	1889354	-21	kworker/u4:1+events_unbound	00:23:36	1
1720381	99	59	30,26	cyclictest	0	-21	swapper/1	21:24:41	1
1720381	99	59	27,29	cyclictest	0	-21	swapper/1	21:50:32	1
1720381	99	59	25,31	cyclictest	0	-21	swapper/1	23:20:38	1
1720381	99	59	23,33	cyclictest	1854003	-21	sh	23:06:20	1
1720381	99	59	19,37	cyclictest	0	-21	swapper/1	21:35:24	1
1720381	99	59	12,9	cyclictest	0	-21	swapper/1	20:25:37	1
1720380	99	59	5,19	cyclictest	1901226	-21	ntpq	00:00:36	0
1720380	99	59	51,6	cyclictest	1725553	-21	kworker/u4:14+events_unbound	19:36:37	0
1720380	99	59	30,4	cyclictest	0	-21	swapper/0	22:13:18	0
1720381	99	58	48,8	cyclictest	1725542	-21	systemd	19:26:34	1
1720381	99	58	30,26	cyclictest	1739219	-21	tail	20:20:22	1
1720381	99	58	27,28	cyclictest	0	-21	swapper/1	00:15:26	1
1720381	99	58	23,32	cyclictest	0	-21	swapper/1	19:45:20	1
1720380	99	58	51,5	cyclictest	1717785	-21	kworker/u4:4+events_unbound	19:11:30	0
1720380	99	58	49,6	cyclictest	1811016	-21	kworker/u4:6+events_unbound	22:22:08	0
1720381	99	57	30,25	cyclictest	1737203	-21	unixbench_multi	20:10:38	1
1720381	99	57	28,27	cyclictest	0	-21	swapper/1	19:55:23	1
1720381	99	57	26,28	cyclictest	0	-21	swapper/1	20:45:20	1
1720381	99	57	25,30	cyclictest	0	-21	swapper/1	00:30:31	1
1720381	99	57	24,30	cyclictest	0	-21	swapper/1	20:50:38	1
1720381	99	57	22,32	cyclictest	0	-21	swapper/1	22:07:37	1
1720381	99	57	22,32	cyclictest	0	-21	swapper/1	22:07:37	1
1720380	99	57	7,13	cyclictest	1844217	-21	ntpq	22:55:26	0
1720381	99	56	29,25	cyclictest	0	-21	swapper/1	21:00:20	1
1720381	99	56	25,29	cyclictest	0	-21	swapper/1	22:30:24	1
1720381	99	56	17,11	cyclictest	1742188	-21	sed	20:30:36	1
1720380	99	54	44,7	cyclictest	1720378	-21	cyclictest	00:12:19	0
1720380	99	54	42,8	cyclictest	1874135	-21	sh	23:30:15	0
1720381	99	53	25,26	cyclictest	1751422	-21	awk	21:10:00	1
1720381	99	53	23,27	cyclictest	0	-21	swapper/1	19:20:02	1
1720381	99	53	20,8	cyclictest	0	-21	swapper/1	19:20:21	1
1720381	99	53	17,4	cyclictest	0	-21	swapper/1	19:35:15	1
1720381	99	52	16,7	cyclictest	0	-21	swapper/1	19:40:13	1
1720380	99	52	46,4	cyclictest	1883758	-21	ssh	23:40:39	0
1720380	99	52	44,6	cyclictest	1733470	-21	kworker/u4:14+events_unbound	20:06:43	0
1720381	99	51	17,6	cyclictest	0	-21	swapper/1	20:00:10	1
1720380	99	51	43,5	cyclictest	1769121	-21	latency_hist	21:30:00	0
1720380	99	51	40,8	cyclictest	1740339	-21	tune2fs	20:25:20	0
1720381	99	50	16,7	cyclictest	1721020	-21	kernelversion	19:10:21	1
1720380	99	50	43,5	cyclictest	1742861	-21	fschecks_count	20:35:18	0
1720380	99	50	28,20	cyclictest	1734020	-21	fschecks_time	20:00:18	0
1720381	99	49	18,3	cyclictest	0	-21	swapper/1	20:40:00	1
1720381	99	49	15,31	cyclictest	0	-21	swapper/1	20:55:31	1
1720380	99	49	39,7	cyclictest	1838880	-21	modprobe	22:49:59	0
1720380	99	49	28,18	cyclictest	0	-21	swapper/0	19:45:13	0
1720380	99	48	40,6	cyclictest	1737795	-21	fschecks_time	20:15:19	0
1720380	99	48	37,8	cyclictest	1730839	-21	kworker/u4:5-rpciod	20:10:15	0
1720380	99	47	41,4	cyclictest	0	-21	swapper/0	20:56:52	0
1720380	99	47	40,5	cyclictest	1746316	-21	latency_hist	20:50:00	0
1720380	99	47	37,7	cyclictest	1828648	-21	kworker/u4:7-rpciod	22:40:01	0
1720380	99	46	39,5	cyclictest	1930830	-21	aten_r7power_en	00:35:17	0
1720380	99	46	39,5	cyclictest	1741594	-21	fschecks_count	20:30:18	0
1720380	99	46	38,6	cyclictest	1	-21	systemd	19:59:37	0
1720380	99	46	37,6	cyclictest	1852860	-21	if_eth0	23:05:27	0
1720380	99	45	38,5	cyclictest	1900063	-21	sh	00:00:01	0
1720380	99	45	38,4	cyclictest	1732113	-21	kworker/u4:12+events_unbound	20:25:02	0
1720380	99	45	34,9	cyclictest	398	-21	systemd-logind	21:11:54	0
1720380	99	44	34,6	cyclictest	1882636	-21	latency_hist	23:40:02	0
1720380	99	44	25,16	cyclictest	0	-21	swapper/0	21:10:01	0
1720380	99	43	36,5	cyclictest	1744160	-21	fschecks_count	20:40:20	0
1720380	99	43	24,17	cyclictest	0	-21	swapper/0	21:35:38	0
1720380	99	42	35,5	cyclictest	1062	-21	lldpd	19:22:14	0
1720380	99	42	30,9	cyclictest	0	-21	swapper/0	19:10:01	0
1720380	99	41	32,7	cyclictest	1732113	-21	kworker/u4:12-rpciod	21:00:38	0
1720380	99	40	32,6	cyclictest	1724491	-21	aten2__	19:25:15	0
1720380	99	40	32,5	cyclictest	1746801	-21	fschecks_time	20:50:21	0
1720381	99	39	31,6	cyclictest	1744919	-21	unixbench_multi	20:40:40	1
1720381	99	30	22,6	cyclictest	0	-21	swapper/1	19:10:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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