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Default latency plot of system in rack #3, slot #6

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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack3slot6.osadl.org (updated Wed Nov 05, 2025 00:45:00)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4605	2	92	16,31	sleep1	0	-21	swapper/1	19:07:19	1
16423	2	87	0,6	chrt	16426	-21	sed	19:40:01	0
5040	99	81	33,43	cyclictest	0	-21	swapper/0	22:25:25	0
5040	99	78	32,40	cyclictest	14	-21	ksoftirqd/0	20:42:05	0
3645	2	74	28,32	sleep0	0	-21	swapper/0	19:05:21	0
5046	99	73	44,10	cyclictest	26	-21	ksoftirqd/1	00:20:14	1
5040	99	73	6,57	cyclictest	6991	-21	apt-get	23:50:16	0
5040	99	73	14,17	cyclictest	0	-21	swapper/0	21:35:13	0
23831	2	73	0,11	sleep1	26	-21	ksoftirqd/1	20:00:22	1
5040	99	72	39,17	cyclictest	14	-21	ksoftirqd/0	19:20:19	0
5040	99	71	38,17	cyclictest	14	-21	ksoftirqd/0	00:20:18	0
5040	99	71	35,26	cyclictest	6952	-21	apt-get	22:20:15	0
5040	99	69	37,25	cyclictest	0	-21	swapper/0	20:45:14	0
5040	99	67	30,25	cyclictest	14291	-21	apt-get	22:40:19	0
5040	99	66	33,21	cyclictest	16268	-21	apt-get	21:15:13	0
5040	99	66	30,24	cyclictest	0	-21	swapper/0	23:40:14	0
5046	99	65	34,17	cyclictest	26	-21	ksoftirqd/1	00:02:00	1
5046	99	65	34,17	cyclictest	26	-21	ksoftirqd/1	00:01:59	1
5040	99	65	32,24	cyclictest	0	-21	swapper/0	00:25:15	0
5040	99	65	31,26	cyclictest	0	-21	swapper/0	22:50:14	0
28766	2	65	0,8	chrt	0	-21	swapper/1	20:15:19	1
5046	99	64	21,20	cyclictest	19909	-21	apt	21:25:00	1
5040	99	64	39,10	cyclictest	14	-21	ksoftirqd/0	23:01:22	0
5040	99	64	36,15	cyclictest	5128	-21	apt-get	19:10:14	0
5040	99	64	35,15	cyclictest	23067	-21	apt-get	00:35:23	0
5040	99	64	35,15	cyclictest	23067	-21	apt-get	00:35:23	0
5040	99	64	32,23	cyclictest	0	-21	swapper/0	00:10:14	0
5040	99	64	21,37	cyclictest	553	-21	runrttasks	22:30:17	0
5040	99	64	17,42	cyclictest	31199	-21	/usr/sbin/munin	23:25:35	0
5046	99	63	37,20	cyclictest	26	-21	ksoftirqd/1	21:48:10	1
5046	99	63	37,20	cyclictest	26	-21	ksoftirqd/1	00:17:37	1
5040	99	63	34,14	cyclictest	32082	-21	apt-get	23:30:17	0
5040	99	63	32,24	cyclictest	0	-21	swapper/0	20:25:15	0
5040	99	63	31,26	cyclictest	0	-21	swapper/0	21:05:10	0
5040	99	62	34,22	cyclictest	0	-21	swapper/0	21:55:15	0
5040	99	62	33,23	cyclictest	0	-21	swapper/0	21:10:15	0
5040	99	62	31,23	cyclictest	0	-21	swapper/0	22:00:15	0
5040	99	62	30,21	cyclictest	0	-21	swapper/0	22:05:14	0
5040	99	62	28,24	cyclictest	0	-21	swapper/0	23:10:17	0
5046	99	61	37,18	cyclictest	26	-21	ksoftirqd/1	22:29:59	1
5046	99	61	32,17	cyclictest	26	-21	ksoftirqd/1	19:26:13	1
5040	99	61	5,19	cyclictest	7308	-21	users	19:15:06	0
5040	99	61	35,16	cyclictest	10524	-21	apt-get	00:00:16	0
5040	99	61	35,16	cyclictest	10524	-21	apt-get	00:00:15	0
5040	99	61	34,14	cyclictest	25192	-21	apt-get	20:05:15	0
5040	99	61	33,13	cyclictest	19499	-21	apt-get	22:55:14	0
5040	99	61	32,22	cyclictest	0	-21	swapper/0	20:19:16	0
5040	99	61	30,23	cyclictest	0	-21	swapper/0	21:45:17	0
5040	99	61	27,21	cyclictest	25372	-21	apt-get	21:40:21	0
5040	99	61	23,25	cyclictest	5188	-21	apt-get	22:15:12	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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