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 Tue Feb 03, 2026 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
160173	99	97	86,8	cyclictest	290188	-21	kworker/u4:5+events_unbound	23:32:57	0
160173	99	81	76,3	cyclictest	329461	-21	kworker/u4:5+events_unbound	23:48:01	0
160173	99	81	72,6	cyclictest	210895	-21	kworker/u4:5+events_unbound	21:47:47	0
160173	99	72	64,6	cyclictest	351765	-21	kworker/u4:11+events_unbound	00:15:01	0
160173	99	70	60,7	cyclictest	338386	-21	kworker/u4:4+events_unbound	23:58:00	0
160174	99	66	32,21	cyclictest	0	-21	swapper/1	00:25:29	1
160173	99	66	44,17	cyclictest	226325	-21	apt-get	21:50:10	0
160173	99	66	43,18	cyclictest	204223	-21	apt-get	21:25:18	0
160173	99	64	40,3	cyclictest	371060	-21	apt-get	00:35:16	0
160173	99	64	30,21	cyclictest	0	-21	swapper/0	00:03:00	0
160173	99	63	58,3	cyclictest	290189	-21	kworker/u4:6+events_unbound	23:07:57	0
160173	99	63	45,13	cyclictest	208635	-21	ssh	21:30:12	0
160174	99	62	41,17	cyclictest	271478	-21	ps	22:40:36	1
160173	99	62	43,13	cyclictest	305502	-21	apt-get	23:20:18	0
160173	99	62	39,4	cyclictest	191631	-21	ntpq	21:10:28	0
160173	99	62	39,15	cyclictest	368001	-21	users	00:30:40	0
160173	99	62	33,12	cyclictest	310704	-21	ntpq	23:25:35	0
160173	99	62	33,12	cyclictest	310704	-21	ntpq	23:25:35	0
160173	99	62	31,14	cyclictest	252647	-21	latency_hist	22:20:01	0
160174	99	61	52,6	cyclictest	341733	-21	unixbench_multi	00:00:41	1
160174	99	61	49,9	cyclictest	213332	-21	df	21:35:18	1
160174	99	61	39,19	cyclictest	331685	-21	ssh	23:50:13	1
160173	99	61	45,10	cyclictest	288037	-21	ssh	23:00:14	0
160173	99	61	40,18	cyclictest	167327	-21	ntpq	19:35:27	0
160173	99	61	40,15	cyclictest	266866	-21	ssh	22:35:30	0
160173	99	61	38,16	cyclictest	184500	-21	apt-get	20:45:16	0
160173	99	61	35,9	cyclictest	213864	-21	ntpq	21:35:30	0
160174	99	60	43,14	cyclictest	305525	-21	ssh	23:20:17	1
160174	99	60	42,15	cyclictest	204253	-21	ssh	21:25:17	1
160173	99	60	53,5	cyclictest	290186	-21	kworker/u4:1+events_unbound	23:12:58	0
160173	99	60	42,14	cyclictest	176127	-21	ntpq	20:10:25	0
160173	99	60	34,11	cyclictest	301624	-21	/usr/sbin/munin	23:15:21	0
160174	99	59	54,3	cyclictest	320609	-21	kworker/u4:1+events_unbound	23:37:59	1
160174	99	59	51,6	cyclictest	193549	-21	kworker/u4:11+events_unbound	21:12:40	1
160174	99	59	42,13	cyclictest	345604	-21	ssh	00:05:27	1
160174	99	59	42,10	cyclictest	279281	-21	ssh	22:50:14	1
160174	99	59	37,19	cyclictest	196026	-21	ssh	21:15:25	1
160173	99	59	48,8	cyclictest	165367	-21	grep	19:30:02	0
160173	99	59	40,14	cyclictest	345621	-21	diskmemload	00:05:28	0
160173	99	59	40,13	cyclictest	187233	-21	diskstats	20:55:18	0
160173	99	59	38,16	cyclictest	166072	-21	ntpq	19:30:33	0
160173	99	59	36,4	cyclictest	196129	-21	ntpq	21:15:29	0
160173	99	59	15,23	cyclictest	0	-21	swapper/0	22:45:33	0
160174	99	58	50,6	cyclictest	210895	-21	kworker/u4:5+events_unbound	21:32:44	1
160174	99	58	42,12	cyclictest	243959	-21	ssh	22:10:11	1
160174	99	58	39,13	cyclictest	368003	-21	ssh	00:30:40	1
160173	99	58	46,9	cyclictest	232727	-21	kworker/u4:16+events_unbound	22:02:50	0
160173	99	58	43,10	cyclictest	362344	-21	apt-get	00:25:14	0
160173	99	58	42,13	cyclictest	261637	-21	apt-get	22:30:12	0
160173	99	58	42,11	cyclictest	186381	-21	ntpq	20:50:29	0
160174	99	57	47,8	cyclictest	371412	-21	fschecks_count	00:35:21	1
160174	99	57	41,11	cyclictest	301142	-21	ssh	23:15:15	1
160174	99	57	30,8	cyclictest	0	-21	swapper/1	23:30:19	1
160173	99	57	43,10	cyclictest	160935	-21	ntpq	19:10:30	0
160173	99	57	42,12	cyclictest	357959	-21	apt-get	00:20:15	0
160173	99	57	31,23	cyclictest	184346	-21	modprobe	20:45:00	0
160174	99	56	39,14	cyclictest	292323	-21	apt-get	23:05:10	1
160174	99	56	36,14	cyclictest	275680	-21	ntpq	22:45:31	1
160173	99	56	43,9	cyclictest	331672	-21	apt-get	23:50:11	0
160173	99	56	43,10	cyclictest	168006	-21	apt-get	19:40:11	0
160173	99	56	41,12	cyclictest	176819	-21	apt-get	20:15:14	0
160173	99	56	38,15	cyclictest	353583	-21	apt-get	00:15:13	0
160173	99	56	36,13	cyclictest	253591	-21	ssh	22:20:29	0
160173	99	56	35,4	cyclictest	239560	-21	apt-get	22:05:12	0
160173	99	56	33,20	cyclictest	218187	-21	ntpq	21:40:24	0
160174	99	55	42,9	cyclictest	240432	-21	ssh	22:05:35	1
160174	99	55	40,10	cyclictest	357975	-21	ssh	00:20:13	1
160174	99	55	39,12	cyclictest	231485	-21	ssh	21:55:29	1
160174	99	55	38,10	cyclictest	200523	-21	ssh	21:20:27	1
160174	99	55	37,14	cyclictest	218431	-21	ps	21:40:34	1
160174	99	55	35,14	cyclictest	230482	-21	ssh	21:55:00	1
160173	99	55	47,6	cyclictest	246170	-21	kworker/u4:7+events_unbound	22:44:00	0
160173	99	55	41,9	cyclictest	279250	-21	apt-get	22:50:12	0
160173	99	55	41,9	cyclictest	188889	-21	ntpq	21:00:28	0
160173	99	55	37,14	cyclictest	171127	-21	ntpq	19:50:28	0
160173	99	55	36,14	cyclictest	230756	-21	apt-get	21:55:17	0
160173	99	55	35,3	cyclictest	182505	-21	ntpq	20:35:33	0
160173	99	55	35,3	cyclictest	182505	-21	ntpq	20:35:32	0
160173	99	55	35,18	cyclictest	173080	-21	aten2__	20:00:15	0
160174	99	54	46,5	cyclictest	163700	-21	threads	19:20:35	1
160174	99	54	39,12	cyclictest	354528	-21	ps	00:15:39	1
160174	99	54	37,12	cyclictest	299943	-21	ssh	23:13:43	1
160174	99	54	36,14	cyclictest	179912	-21	ntpq	20:25:26	1
160173	99	54	42,9	cyclictest	163551	-21	ps	19:20:34	0
160173	99	54	39,12	cyclictest	169328	-21	/usr/sbin/munin	19:45:17	0
160173	99	54	39,12	cyclictest	169328	-21	/usr/sbin/munin	19:45:16	0
160173	99	54	39,10	cyclictest	284320	-21	ntpq	22:55:25	0
160173	99	54	39,10	cyclictest	179969	-21	ntpq	20:25:31	0
160173	99	54	38,13	cyclictest	161580	-21	apt-get	19:15:12	0
160173	99	54	36,14	cyclictest	319246	-21	sh	23:35:24	0
160173	99	54	29,20	cyclictest	189676	-21	/usr/sbin/munin	21:05:15	0
160173	99	54	28,22	cyclictest	322989	-21	apt-get	23:40:18	0
160173	99	54	28,22	cyclictest	244077	-21	cut	22:10:16	0
160173	99	54	27,10	cyclictest	257238	-21	apt-get	22:25:12	0
160174	99	53	40,9	cyclictest	350155	-21	ps	00:10:37	1
160174	99	53	38,12	cyclictest	284312	-21	ssh	22:55:25	1
160174	99	53	37,14	cyclictest	221960	-21	ssh	21:45:14	1
160174	99	53	36,14	cyclictest	253706	-21	ssh	22:20:36	1
160174	99	53	36,10	cyclictest	336964	-21	grep	23:55:34	1
160174	99	53	33,16	cyclictest	323028	-21	apt-get	23:40:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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