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 Thu Jul 23, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4159529	99	104	94,7	cyclictest	4163331	-21	kworker/u4:8+events_unbound	19:35:21	1
4159529	99	101	91,8	cyclictest	4178667	-21	kworker/u4:1+events_unbound	20:40:30	1
4159529	99	100	90,7	cyclictest	4164608	-21	kworker/u4:15+events_unbound	20:10:27	1
4159529	99	94	86,6	cyclictest	65635	-21	kworker/u4:11+events_unbound	22:50:49	1
4159529	99	94	86,6	cyclictest	4170984	-21	kworker/u4:11+events_unbound	20:05:25	1
4159529	99	88	81,5	cyclictest	56569	-21	kworker/u4:2+events_unbound	22:20:40	1
4159529	99	86	77,7	cyclictest	4181293	-21	kworker/u4:9+events_unbound	20:35:28	1
4159529	99	85	76,7	cyclictest	30128	-21	kworker/u4:3+events_unbound	21:50:35	1
4159529	99	85	76,6	cyclictest	4148294	-21	kworker/u4:17+events_unbound	19:20:17	1
4159529	99	84	77,5	cyclictest	159394	-21	kworker/u4:2+events_unbound	00:28:33	1
4159528	99	84	75,7	cyclictest	126053	-21	kworker/u4:14+events_unbound	23:40:55	0
4159529	99	80	70,7	cyclictest	4169706	-21	kworker/u4:0+events_unbound	19:55:25	1
4159529	99	79	67,10	cyclictest	25618	-21	kworker/u4:10+events_unbound	21:45:35	1
4159529	99	78	70,6	cyclictest	3693	-21	kworker/u4:3+events_unbound	21:30:34	1
4159529	99	78	70,6	cyclictest	3693	-21	kworker/u4:3+events_unbound	21:30:34	1
4159529	99	77	70,5	cyclictest	85329	-21	kworker/u4:12+events_unbound	23:00:50	1
4159529	99	76	67,7	cyclictest	4188975	-21	kworker/u4:20+events_unbound	21:05:31	1
4159528	99	76	69,5	cyclictest	94382	-21	kworker/u4:2+events_unbound	23:20:53	0
4159529	99	75	63,6	cyclictest	134424	-21	kworker/u4:3+events_unbound	23:46:54	1
4159529	99	74	67,5	cyclictest	152092	-21	kworker/u4:12+events_unbound	00:11:01	1
4159529	99	74	64,7	cyclictest	4178667	-21	kworker/u4:1+events_unbound	21:10:33	1
4159528	99	74	3,30	cyclictest	53	-21	kswapd0	00:10:18	0
4159528	99	73	47,22	cyclictest	256	50	irq/23-42890000.ethernet	21:15:14	0
4159529	99	72	63,7	cyclictest	177505	-21	kworker/u4:1+events_unbound	00:38:40	1
4159528	99	72	41,28	cyclictest	0	-21	swapper/0	23:00:36	0
4159529	99	71	63,6	cyclictest	39155	-21	kworker/u4:13+events_unbound	22:05:36	1
4159529	99	69	62,5	cyclictest	112528	-21	kworker/u4:8+events_unbound	23:30:54	1
4159528	99	69	1,61	cyclictest	4178695	-21	apt-get	20:25:09	0
4159529	99	68	57,7	cyclictest	0	-21	swapper/1	21:40:39	1
4159528	99	68	58,7	cyclictest	16557	-21	kworker/u4:6+events_unbound	21:35:33	0
4159529	99	67	59,6	cyclictest	4162037	-21	kworker/u4:6+events_unbound	20:25:29	1
4159528	99	67	36,28	cyclictest	4177849	-21	fschecks_count	20:20:17	0
4159528	99	67	31,34	cyclictest	4172218	-21	unixbench_singl	19:55:40	0
4159528	99	67	28,36	cyclictest	0	-21	swapper/0	20:05:28	0
4159529	99	66	57,7	cyclictest	4148294	-21	kworker/u4:17+events_unbound	20:00:24	1
4159528	99	66	32,31	cyclictest	0	-21	swapper/0	00:15:31	0
4159528	99	66	30,34	cyclictest	4168721	-21	aten_r7power_po	19:45:18	0
4159528	99	66	28,35	cyclictest	0	-21	swapper/0	23:30:34	0
4159529	99	65	47,10	cyclictest	0	-21	swapper/1	23:35:12	1
4159528	99	65	4,21	cyclictest	137604	-21	ssh	23:50:38	0
4159528	99	65	34,27	cyclictest	0	-21	swapper/0	00:25:31	0
4159528	99	65	33,28	cyclictest	0	-21	swapper/0	23:35:41	0
4159528	99	65	31,32	cyclictest	4164781	-21	/usr/sbin/munin	19:30:19	0
4159528	99	65	31,32	cyclictest	150511	-21	gltestperf	00:05:23	0
4159528	99	65	30,32	cyclictest	0	-21	swapper/0	22:40:13	0
4159528	99	65	30,31	cyclictest	0	-21	swapper/0	21:55:24	0
4159528	99	65	28,34	cyclictest	0	-21	swapper/0	21:30:30	0
4159528	99	65	28,34	cyclictest	0	-21	swapper/0	21:30:29	0
4159528	99	65	27,34	cyclictest	0	-21	swapper/0	19:25:15	0
4159528	99	65	26,35	cyclictest	0	-21	swapper/0	00:00:00	0
4159528	99	64	4,24	cyclictest	171807	-21	ps	00:30:35	0
4159528	99	64	33,28	cyclictest	0	-21	swapper/0	23:45:31	0
4159528	99	64	28,32	cyclictest	0	-21	swapper/0	22:00:31	0
4159528	99	64	17,44	cyclictest	0	-21	swapper/0	22:15:01	0
4159528	99	63	29,31	cyclictest	0	-21	swapper/0	23:10:01	0
4159528	99	63	29,31	cyclictest	0	-21	swapper/0	21:20:32	0
4159528	99	63	28,32	cyclictest	0	-21	swapper/0	22:15:31	0
4159528	99	63	28,31	cyclictest	0	-21	swapper/0	00:00:28	0
4159528	99	63	2,16	cyclictest	176191	-21	ntpq	00:35:36	0
4159528	99	62	52,7	cyclictest	152092	-21	kworker/u4:12+events_unbound	00:23:34	0
4159528	99	62	36,16	cyclictest	256	50	irq/23-42890000.ethernet	21:40:07	0
4159528	99	62	26,32	cyclictest	0	-21	swapper/0	22:26:24	0
4159528	99	62	25,32	cyclictest	0	-21	swapper/0	19:10:02	0
4159528	99	62	22,4	cyclictest	0	-21	swapper/0	22:05:33	0
4159528	99	62	2,17	cyclictest	33851	-21	ssh	21:51:10	0
4159529	99	61	51,6	cyclictest	0	-21	swapper/1	00:20:11	1
4159528	99	61	27,31	cyclictest	0	-21	swapper/0	21:25:16	0
4159528	99	61	25,33	cyclictest	0	-21	swapper/0	21:45:23	0
4159528	99	61	21,5	cyclictest	0	-21	swapper/0	21:15:00	0
4159528	99	61	20,38	cyclictest	0	-21	swapper/0	23:15:22	0
4159529	99	60	44,6	cyclictest	56571	-21	kworker/u4:5+events_unbound	22:45:47	1
4159528	99	60	22,7	cyclictest	0	-21	swapper/0	20:50:24	0
4159528	99	60	22,5	cyclictest	0	-21	swapper/0	19:15:12	0
4159528	99	60	21,7	cyclictest	0	-21	swapper/0	20:35:01	0
4159528	99	60	20,5	cyclictest	0	-21	swapper/0	19:45:00	0
4159529	99	59	45,6	cyclictest	65635	-21	kworker/u4:11+events_unbound	22:40:47	1
4159528	99	59	26,31	cyclictest	0	-21	swapper/0	19:35:39	0
4159528	99	59	24,5	cyclictest	0	-21	swapper/0	19:25:01	0
4159529	99	58	51,5	cyclictest	65634	-21	kworker/u4:10+events_unbound	22:30:42	1
4159529	99	58	51,5	cyclictest	41985	-21	sh	22:00:35	1
4159528	99	58	27,28	cyclictest	0	-21	swapper/0	22:20:16	0
4159528	99	58	25,5	cyclictest	0	-21	swapper/0	23:25:42	0
4159528	99	58	24,5	cyclictest	83601	-21	sed	22:50:21	0
4159528	99	58	23,5	cyclictest	256	50	irq/23-42890000.ethernet	21:10:01	0
4159528	99	58	23,4	cyclictest	0	-21	swapper/0	20:55:18	0
4159528	99	58	22,6	cyclictest	0	-21	swapper/0	19:50:36	0
4159529	99	57	52,4	cyclictest	65633	-21	kworker/u4:9+events_unbound	22:35:46	1
4159528	99	57	46,7	cyclictest	256	50	irq/23-42890000.ethernet	22:55:12	0
4159528	99	57	26,4	cyclictest	98906	-21	kworker/u4:4-rpciod	23:10:18	0
4159528	99	57	26,27	cyclictest	0	-21	swapper/0	20:45:34	0
4159528	99	57	18,5	cyclictest	0	-21	swapper/0	21:00:29	0
4159529	99	56	49,4	cyclictest	37	-21	kcompactd0	00:15:17	1
4159528	99	56	23,5	cyclictest	0	-21	swapper/0	20:40:18	0
4159529	99	55	46,6	cyclictest	115736	-21	timerwakeupswit	23:25:42	1
4159529	99	55	36,14	cyclictest	0	-21	swapper/1	22:15:29	1
4159529	99	55	3,43	cyclictest	128778	-21	ssh	23:40:39	1
4159528	99	55	24,4	cyclictest	0	-21	swapper/0	22:45:30	0
4159528	99	55	23,29	cyclictest	0	-21	swapper/0	20:40:02	0
4159529	99	54	46,5	cyclictest	4180022	-21	kworker/u4:3+events_unbound	20:55:30	1
4159528	99	54	24,4	cyclictest	0	-21	swapper/0	22:33:06	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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