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 Wed Jan 28, 2026 00:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
166622	99	109	95,8	cyclictest	368112	-21	kworker/u4:9+events_unbound	00:37:37	0
166622	99	107	94,6	cyclictest	329432	-21	kworker/u4:0+events_unbound	00:12:33	0
166622	99	104	96,6	cyclictest	256141	-21	kworker/u4:4+events_unbound	22:22:09	0
166622	99	103	89,5	cyclictest	307674	-21	kworker/u4:10+events_unbound	23:17:22	0
166622	99	100	85,13	cyclictest	338136	-21	kworker/u4:1+events_unbound	23:57:31	0
166622	99	99	82,5	cyclictest	368112	-21	kworker/u4:9+events_unbound	00:27:36	0
166622	99	98	90,6	cyclictest	329439	-21	kworker/u4:9+events_unbound	23:47:28	0
166622	99	88	75,6	cyclictest	221043	-21	kworker/u4:4+events_unbound	21:37:01	0
166622	99	87	72,6	cyclictest	273666	-21	kworker/u4:11+events_unbound	00:07:32	0
166622	99	84	67,10	cyclictest	54	-21	kswapd0	21:55:09	0
166623	99	83	74,6	cyclictest	325049	-21	kworker/u4:7+events_unbound	23:52:31	1
166622	99	83	71,10	cyclictest	54	-21	kswapd0	22:45:10	0
166622	99	83	64,8	cyclictest	221692	-21	kworker/u4:10+events_unbound	21:45:00	0
166622	99	81	75,4	cyclictest	0	-21	swapper/0	23:20:28	0
166622	99	79	2,58	cyclictest	315127	-21	ssh	23:25:25	0
166622	99	79	2,58	cyclictest	315127	-21	ssh	23:25:25	0
166622	99	73	66,5	cyclictest	184411	-21	kworker/u4:9+events_unbound	21:10:02	0
166622	99	72	33,28	cyclictest	255	50	irq/23-42890000.ethernet	20:30:08	0
166623	99	71	64,5	cyclictest	256141	-21	kworker/u4:4+events_unbound	22:27:10	1
166623	99	71	61,7	cyclictest	376811	-21	kworker/u4:4+events_unbound	00:40:01	1
166623	99	71	27,41	cyclictest	0	-21	swapper/1	23:25:13	1
166623	99	71	27,41	cyclictest	0	-21	swapper/1	23:25:13	1
166622	99	71	63,6	cyclictest	167921	-21	kworker/u4:4+events_unbound	19:21:40	0
166622	99	71	55,6	cyclictest	197133	-21	kworker/u4:1+events_unbound	21:47:03	0
166623	99	70	57,10	cyclictest	54	-21	kswapd0	00:30:34	1
166622	99	69	61,6	cyclictest	329432	-21	kworker/u4:0+events_unbound	00:05:01	0
166623	99	68	56,10	cyclictest	183157	-21	systemd	20:11:48	1
166622	99	68	63,4	cyclictest	15	1	ktimers/0	23:36:52	0
166622	99	68	60,6	cyclictest	189552	-21	kworker/u4:12+events_unbound	20:51:53	0
166622	99	68	60,6	cyclictest	179365	-21	kworker/u4:6+events_unbound	20:06:48	0
166622	99	68	40,15	cyclictest	226137	-21	kworker/u4:12+events_unbound	22:10:44	0
166623	99	67	53,9	cyclictest	327617	-21	grep	23:40:18	1
166622	99	67	60,5	cyclictest	256144	-21	kworker/u4:7+events_unbound	23:00:14	0
166622	99	67	60,5	cyclictest	169181	-21	kworker/u4:14+events_unbound	19:31:44	0
166622	99	67	59,5	cyclictest	15	1	ktimers/0	00:16:44	0
166623	99	66	34,29	cyclictest	293346	-21	grep	23:00:25	1
166623	99	66	30,32	cyclictest	0	-21	swapper/1	22:45:01	1
166623	99	66	20,43	cyclictest	0	-21	swapper/1	00:00:10	1
166622	99	66	56,8	cyclictest	203990	-21	kworker/u4:7+events_unbound	21:16:58	0
166623	99	65	31,30	cyclictest	0	-21	swapper/1	23:05:31	1
166623	99	65	31,30	cyclictest	0	-21	swapper/1	21:50:27	1
166622	99	65	59,4	cyclictest	167921	-21	kworker/u4:4+events_unbound	19:17:02	0
166623	99	64	33,28	cyclictest	280974	-21	unixbench-2d	22:45:45	1
166623	99	64	31,29	cyclictest	0	-21	swapper/1	22:20:29	1
166623	99	64	30,31	cyclictest	0	-21	swapper/1	22:00:38	1
166623	99	64	28,33	cyclictest	0	-21	swapper/1	22:05:23	1
166623	99	64	26,34	cyclictest	0	-21	swapper/1	20:40:17	1
166623	99	64	2,16	cyclictest	319361	-21	ssh	23:30:25	1
166623	99	63	4,7	cyclictest	284977	-21	ssh	22:50:36	1
166623	99	63	3,7	cyclictest	219310	-21	apt-get	21:35:12	1
166623	99	63	2,18	cyclictest	353664	-21	ssh	00:10:25	1
166623	99	63	2,10	cyclictest	224354	-21	ntpq	21:40:24	1
166622	99	63	10,46	cyclictest	166596	-21	apt-get	19:10:06	0
166623	99	62	6,39	cyclictest	228727	-21	ssh	21:45:27	1
166623	99	62	2,11	cyclictest	365918	-21	apt-get	00:25:09	1
166623	99	61	51,7	cyclictest	204029	-21	systemd	21:16:57	1
166623	99	61	31,28	cyclictest	249642	-21	cut	22:10:14	1
166623	99	61	31,24	cyclictest	191051	-21	basename	20:45:16	1
166623	99	61	2,20	cyclictest	306585	-21	ntpq	23:15:30	1
166623	99	61	2,12	cyclictest	358320	-21	ssh	00:15:48	1
166623	99	61	1,14	cyclictest	253866	-21	ssh	22:15:12	1
166622	99	61	54,5	cyclictest	203990	-21	kworker/u4:7+events_unbound	21:23:44	0
166622	99	61	52,3	cyclictest	167921	-21	kworker/u4:4+events_unbound	20:11:49	0
166623	99	60	5,7	cyclictest	215011	-21	ssh	21:30:15	1
166623	99	60	3,12	cyclictest	348770	-21	apt-get	00:05:20	1
166623	99	60	28,28	cyclictest	0	-21	swapper/1	23:35:35	1
166623	99	60	26,30	cyclictest	0	-21	swapper/1	22:30:45	1
166623	99	60	2,15	cyclictest	310864	-21	ntpq	23:20:26	1
166623	99	60	10,47	cyclictest	197177	-21	diskmemload	21:20:38	1
166622	99	60	8,31	cyclictest	0	-21	swapper/0	19:10:01	0
166622	99	60	53,5	cyclictest	181901	-21	kworker/u4:13+events_unbound	20:55:02	0
166623	99	59	54,3	cyclictest	167923	-21	kworker/u4:7+events_unbound	19:51:45	1
166623	99	59	49,7	cyclictest	172197	-21	df	19:30:22	1
166623	99	59	30,25	cyclictest	0	-21	swapper/1	00:20:20	1
166623	99	59	29,26	cyclictest	0	-21	swapper/1	21:25:22	1
166623	99	58	49,7	cyclictest	236639	-21	/usr/sbin/munin	21:55:13	1
166623	99	58	29,26	cyclictest	0	-21	swapper/1	21:05:17	1
166623	99	58	28,26	cyclictest	0	-21	swapper/1	23:45:32	1
166623	99	58	27,26	cyclictest	0	-21	swapper/1	20:30:00	1
166623	99	58	26,28	cyclictest	0	-21	swapper/1	20:05:38	1
166623	99	58	22,33	cyclictest	272426	-21	sed	22:35:42	1
166623	99	58	11,42	cyclictest	198334	-21	ssh	21:10:34	1
166623	99	58	1,10	cyclictest	288409	-21	ssh	22:55:12	1
166622	99	58	52,5	cyclictest	181900	-21	kworker/u4:12+events_unbound	20:21:49	0
166622	99	58	50,6	cyclictest	179367	-21	kworker/u4:8+events_unbound	20:17:01	0
166622	99	58	39,6	cyclictest	247369	-21	kworker/u4:14+events_unbound	22:08:25	0
166622	99	58	37,7	cyclictest	290609	-21	kworker/u4:0+events_unbound	23:08:21	0
166623	99	57	3,7	cyclictest	187833	-21	ntpq	20:30:31	1
166623	99	57	25,28	cyclictest	0	-21	swapper/1	20:15:12	1
166623	99	57	2,14	cyclictest	302246	-21	ntpq	23:10:30	1
166622	99	57	17,33	cyclictest	0	-21	swapper/0	22:00:11	0
166623	99	56	25,28	cyclictest	176187	-21	gltestperf	19:45:20	1
166623	99	56	24,28	cyclictest	0	-21	swapper/1	20:55:19	1
166623	99	55	7,8	cyclictest	0	-21	swapper/1	20:50:29	1
166623	99	55	20,31	cyclictest	0	-21	swapper/1	23:55:25	1
166623	99	55	1,14	cyclictest	189110	-21	ntpq	20:35:27	1
166623	99	55	1,13	cyclictest	178840	-21	ntpq	19:55:23	1
166622	99	55	48,5	cyclictest	234482	-21	sshd	21:52:03	0
166623	99	54	44,8	cyclictest	180643	-21	systemd	20:01:46	1
166623	99	54	32,20	cyclictest	169203	-21	cron	19:20:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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