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 376 highest latencies:

System rack7slot2.osadl.org (updated Tue Aug 25, 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
1659848	99	94	79,6	cyclictest	1808625	-21	kworker/u4:9+events_unbound	23:27:58	0
1659848	99	90	83,5	cyclictest	1782249	-21	kworker/u4:4+events_unbound	23:17:57	0
1659848	99	84	77,5	cyclictest	1671300	-21	kworker/u4:4+events_unbound	20:07:30	0
1659849	99	82	70,6	cyclictest	1697663	-21	kworker/u4:8+events_unbound	21:17:39	1
1659848	99	82	74,6	cyclictest	1822087	-21	kworker/u4:7+events_unbound	00:18:06	0
1659848	99	82	74,6	cyclictest	1756060	-21	kworker/u4:6+events_unbound	22:22:51	0
1659848	99	82	74,6	cyclictest	1680252	-21	kworker/u4:15+events_unbound	20:27:33	0
1659848	99	77	70,5	cyclictest	1677675	-21	kworker/u4:0+events_unbound	20:37:35	0
1659848	99	76	61,12	cyclictest	53	-21	kswapd0	00:35:44	0
1659848	99	74	67,5	cyclictest	1786755	-21	kworker/u4:2+events_unbound	23:07:58	0
1659848	99	72	65,5	cyclictest	1682791	-21	kworker/u4:17+events_unbound	20:47:37	0
1659848	99	72	60,5	cyclictest	1659777	-21	kworker/u4:5+events_unbound	19:32:24	0
1659849	99	71	27,39	cyclictest	0	-21	swapper/1	20:05:36	1
1659848	99	71	65,5	cyclictest	1671298	-21	kworker/u4:1+events_unbound	20:02:30	0
1659848	99	71	64,5	cyclictest	1777773	-21	kworker/u4:0+events_unbound	22:47:55	0
1659848	99	71	64,5	cyclictest	1667457	-21	kworker/u4:7+events_unbound	19:37:25	0
1659848	99	70	64,3	cyclictest	0	-21	swapper/0	22:10:24	0
1659848	99	70	64,3	cyclictest	0	-21	swapper/0	22:10:23	0
1659848	99	70	63,5	cyclictest	1671302	-21	kworker/u4:7+events_unbound	20:17:31	0
1659848	99	70	46,18	cyclictest	1671298	-21	kworker/u4:1+events_unbound	20:55:12	0
1659849	99	69	36,31	cyclictest	1688606	-21	fschecks_time	21:00:20	1
1659849	99	68	50,13	cyclictest	1765016	-21	kworker/u4:3+events_unbound	22:50:14	1
1659849	99	68	34,30	cyclictest	0	-21	swapper/1	21:40:31	1
1659849	99	68	32,32	cyclictest	1871058	-21	diskmemload	00:35:41	1
1659848	99	68	61,5	cyclictest	1680250	-21	kworker/u4:13+events_unbound	21:02:38	0
1659848	99	68	2,59	cyclictest	0	-21	swapper/0	22:05:28	0
1659849	99	67	36,29	cyclictest	1843943	-21	cron	00:04:59	1
1659849	99	67	34,30	cyclictest	1777774	-21	kworker/u4:1-rpciod	23:00:43	1
1659849	99	67	31,33	cyclictest	0	-21	swapper/1	23:35:39	1
1659849	99	66	59,3	cyclictest	1786754	-21	kworker/u4:0+events_unbound	23:12:57	1
1659849	99	66	32,31	cyclictest	0	-21	swapper/1	22:25:18	1
1659849	99	66	29,31	cyclictest	0	-21	swapper/1	00:10:58	1
1659848	99	66	45,18	cyclictest	1692170	-21	/usr/sbin/munin	21:10:40	0
1659849	99	65	32,30	cyclictest	0	-21	swapper/1	22:10:23	1
1659849	99	65	32,30	cyclictest	0	-21	swapper/1	22:10:23	1
1659849	99	65	2,17	cyclictest	1728049	-21	ssh	21:50:35	1
1659848	99	65	58,5	cyclictest	1658570	-21	kworker/u4:2+events_unbound	19:17:22	0
1659849	99	64	31,30	cyclictest	0	-21	swapper/1	22:20:30	1
1659849	99	64	31,30	cyclictest	0	-21	swapper/1	21:40:01	1
1659849	99	64	30,31	cyclictest	0	-21	swapper/1	23:25:39	1
1659849	99	64	27,34	cyclictest	0	-21	swapper/1	00:25:30	1
1659848	99	64	58,4	cyclictest	1673869	-21	kworker/u4:11+events_unbound	20:12:30	0
1659848	99	64	48,5	cyclictest	1822087	-21	kworker/u4:7+events_unbound	00:10:03	0
1659849	99	63	30,29	cyclictest	0	-21	swapper/1	21:10:41	1
1659849	99	63	30,29	cyclictest	0	-21	swapper/1	00:25:01	1
1659849	99	63	30,28	cyclictest	0	-21	swapper/1	21:25:31	1
1659849	99	63	24,35	cyclictest	0	-21	swapper/1	20:45:31	1
1659849	99	63	1,25	cyclictest	1837231	-21	ssh	23:57:12	1
1659849	99	62	55,5	cyclictest	1648633	-21	kworker/u4:16+events_unbound	19:47:25	1
1659849	99	62	28,31	cyclictest	0	-21	swapper/1	00:10:02	1
1659849	99	62	28,30	cyclictest	0	-21	swapper/1	22:45:26	1
1659849	99	62	27,33	cyclictest	1835260	-21	latency_hist	23:55:04	1
1659849	99	62	27,33	cyclictest	1835260	-21	latency_hist	23:55:03	1
1659849	99	62	27,31	cyclictest	0	-21	swapper/1	23:20:38	1
1659849	99	62	25,33	cyclictest	1766966	-21	aten_r7power_en	22:35:15	1
1659849	99	61	6,22	cyclictest	601	-21	sendmail-mta	20:50:37	1
1659849	99	61	6,16	cyclictest	1663674	-21	idleruntime-cro	19:25:01	1
1659849	99	61	3,16	cyclictest	1815448	-21	apt-get	23:30:11	1
1659849	99	61	30,28	cyclictest	0	-21	swapper/1	19:25:39	1
1659849	99	61	28,30	cyclictest	1667225	-21	awk	19:35:38	1
1659849	99	61	22,36	cyclictest	1710335	-21	switchtime	21:30:40	1
1659849	99	61	22,35	cyclictest	0	-21	swapper/1	20:55:02	1
1659849	99	61	20,37	cyclictest	0	-21	swapper/1	19:50:32	1
1659848	99	61	51,7	cyclictest	53	-21	kswapd0	22:50:10	0
1659848	99	61	47,8	cyclictest	1697663	-21	kworker/u4:8+events_unbound	21:25:46	0
1659849	99	60	30,28	cyclictest	0	-21	swapper/1	21:45:43	1
1659849	99	60	28,29	cyclictest	0	-21	swapper/1	22:45:03	1
1659849	99	60	27,30	cyclictest	0	-21	swapper/1	22:00:32	1
1659849	99	60	26,31	cyclictest	0	-21	swapper/1	22:05:29	1
1659849	99	60	26,30	cyclictest	0	-21	swapper/1	21:20:43	1
1659849	99	60	23,34	cyclictest	0	-21	swapper/1	23:05:40	1
1659849	99	60	23,33	cyclictest	1671301	-21	kworker/u4:5-rpciod	20:20:00	1
1659849	99	60	23,33	cyclictest	0	-21	swapper/1	21:55:28	1
1659848	99	60	50,7	cyclictest	53	-21	kswapd0	22:45:01	0
1659849	99	59	4,17	cyclictest	1825040	-21	ntpq	23:40:30	1
1659849	99	58	30,26	cyclictest	1716160	-21	kworker/u4:9-rpciod	22:32:51	1
1659849	99	58	26,29	cyclictest	0	-21	swapper/1	22:15:39	1
1659849	99	58	26,29	cyclictest	0	-21	swapper/1	22:15:38	1
1659849	99	58	26,27	cyclictest	0	-21	swapper/1	19:40:36	1
1659848	99	58	51,5	cyclictest	1668757	-21	kworker/u4:12+events_unbound	20:42:36	0
1659849	99	57	27,28	cyclictest	1659845	-21	cyclictest	00:20:02	1
1659849	99	57	27,26	cyclictest	0	-21	swapper/1	19:15:38	1
1659849	99	57	25,28	cyclictest	1673869	-21	kworker/u4:11+rpciod	20:40:15	1
1659849	99	57	24,28	cyclictest	0	-21	swapper/1	19:10:35	1
1659849	99	57	20,4	cyclictest	0	-21	swapper/1	00:30:22	1
1659848	99	57	51,4	cyclictest	1784563	-21	aten_r7power_cu	22:55:16	0
1659848	99	57	38,16	cyclictest	1753468	-21	sed	22:20:01	0
1659848	99	57	38,16	cyclictest	1753468	-21	sed	22:20:01	0
1659849	99	56	31,22	cyclictest	1795751	-21	kworker/u4:5-rpciod	23:15:19	1
1659849	99	56	28,25	cyclictest	0	-21	swapper/1	22:55:33	1
1659849	99	56	25,28	cyclictest	0	-21	swapper/1	20:25:40	1
1659849	99	56	23,29	cyclictest	0	-21	swapper/1	21:05:24	1
1659849	99	56	18,8	cyclictest	1681550	-21	cron	20:35:00	1
1659848	99	56	42,9	cyclictest	1768796	-21	kworker/u4:6-rpciod	22:36:41	0
1659848	99	55	40,10	cyclictest	1830473	-21	ssh	23:48:02	0
1659848	99	54	48,4	cyclictest	1682791	-21	kworker/u4:17+events_unbound	21:05:03	0
1659849	99	53	23,27	cyclictest	0	-21	swapper/1	20:35:26	1
1659849	99	53	20,5	cyclictest	1831735	-21	cron	23:50:00	1
1659848	99	53	45,6	cyclictest	1711574	-21	kworker/u4:7+events_unbound	21:55:00	0
1659848	99	53	36,11	cyclictest	1860608	-21	modprobe	00:25:00	0
1659848	99	53	3,46	cyclictest	1763204	-21	sh	22:30:28	0
1659848	99	53	33,10	cyclictest	0	-21	swapper/0	21:40:10	0
1659849	99	52	19,5	cyclictest	1671303	-21	kworker/u4:8+rpciod	20:01:40	1
1659848	99	52	44,5	cyclictest	1718040	-21	apt-config	21:40:01	0
1659848	99	52	43,8	cyclictest	1820105	-21	aten_r7power_po	23:35:28	0
1659848	99	52	34,16	cyclictest	1844643	-21	fschecks_count	00:05:22	0
1659848	99	51	44,5	cyclictest	1825670	-21	/usr/sbin/munin	23:40:43	0
1659848	99	51	43,6	cyclictest	1782249	-21	kworker/u4:4+events_unbound	23:00:02	0
1659849	99	50	39,8	cyclictest	1678607	-21	ps	20:20:39	1
1659848	99	50	43,5	cyclictest	1700926	-21	gcc	21:20:31	0
1659849	99	47	38,6	cyclictest	0	-21	swapper/1	19:32:23	1
1659848	99	47	4,38	cyclictest	0	-21	swapper/0	20:50:11	0
1659848	99	47	40,5	cyclictest	1865753	-21	tr	00:30:21	0
1659848	99	47	38,7	cyclictest	1735702	-21	sendmail	22:00:00	0
1659848	99	46	39,5	cyclictest	1736741	-21	ntp_kernel_pll_	22:00:31	0
1659848	99	46	39,5	cyclictest	1726895	-21	idleruntime-cro	21:50:01	0
1659848	99	46	38,6	cyclictest	1695898	-21	fschecks_count	21:15:23	0
1659848	99	46	37,7	cyclictest	1710527	-21	/usr/sbin/munin	21:30:43	0
1659848	99	46	21,18	cyclictest	0	-21	swapper/0	00:25:20	0
1659848	99	45	39,5	cyclictest	1822086	-21	kworker/u4:5+events_unbound	23:55:05	0
1659848	99	45	38,4	cyclictest	1798416	-21	ld	23:10:25	0
1659848	99	45	37,6	cyclictest	1838506	-21	kworker/u4:18+events_unbound	00:00:03	0
1659848	99	45	37,5	cyclictest	1756061	-21	kworker/u4:7-rpciod	23:30:37	0
1659848	99	44	37,4	cyclictest	0	-21	swapper/0	19:52:25	0
1659848	99	43	37,4	cyclictest	1680643	-21	sed	20:30:19	0
1659848	99	43	37,4	cyclictest	1664135	-21	fschecks_time	19:25:21	0
1659848	99	43	35,6	cyclictest	1758725	-21	/usr/sbin/munin	22:25:24	0
1659848	99	43	23,4	cyclictest	0	-21	swapper/0	20:00:00	0
1659849	99	42	33,7	cyclictest	1675547	-21	df_abs	20:10:17	1
1659848	99	42	34,6	cyclictest	1668916	-21	latency_hist	19:45:02	0
1659848	99	42	22,8	cyclictest	1756061	-21	kworker/u4:7+events_unbound	23:24:04	0
1659848	99	41	38,2	cyclictest	1661068	-21	kworker/u4:6+events_unbound	19:47:28	0
1659848	99	39	32,5	cyclictest	1659845	-21	cyclictest	23:51:53	0
1659848	99	39	32,5	cyclictest	1659845	-21	cyclictest	23:51:52	0
1659848	99	38	29,6	cyclictest	0	-21	swapper/0	19:20:17	0
1659848	99	38	18,18	cyclictest	1678151	-21	fschecks_count	20:20:19	0
1659849	99	37	29,6	cyclictest	0	-21	swapper/1	19:10:02	1
1659849	99	37	27,7	cyclictest	0	-21	swapper/1	19:55:38	1
1659848	99	37	32,3	cyclictest	0	-21	swapper/0	19:10:16	0
1659848	99	30	23,5	cyclictest	0	-21	swapper/0	19:10:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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