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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 Sun Jun 14, 2026 12:45:01)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
30312	2	149	85,38	sleep1	0	-21	swapper/1	07:05:16	1
31428	2	99	14,37	sleep0	0	-21	swapper/0	07:05:51	0
31997	99	88	14,61	cyclictest	0	-21	swapper/1	11:40:13	1
31997	99	88	13,62	cyclictest	0	-21	swapper/1	07:30:13	1
31997	99	88	13,60	cyclictest	0	-21	swapper/1	08:05:15	1
31997	99	87	13,58	cyclictest	0	-21	swapper/1	07:10:12	1
31997	99	86	7,59	cyclictest	16546	-21	apt-get	12:25:10	1
31997	99	85	14,60	cyclictest	0	-21	swapper/1	08:35:12	1
31993	99	85	6,69	cyclictest	0	-21	swapper/0	12:25:10	0
31997	99	84	13,55	cyclictest	0	-21	swapper/1	08:55:11	1
31997	99	83	17,54	cyclictest	0	-21	swapper/1	10:20:11	1
31997	99	83	14,57	cyclictest	0	-21	swapper/1	10:40:13	1
31997	99	83	12,57	cyclictest	0	-21	swapper/1	09:30:13	1
31997	99	82	9,63	cyclictest	36	-21	kcompactd0	10:25:14	1
31997	99	82	14,56	cyclictest	0	-21	swapper/1	09:15:22	1
31997	99	82	13,59	cyclictest	0	-21	swapper/1	10:35:12	1
31997	99	82	13,58	cyclictest	0	-21	swapper/1	07:50:14	1
31997	99	82	13,57	cyclictest	0	-21	swapper/1	11:15:12	1
31993	99	82	24,53	cyclictest	243	-21	systemd-journal	09:35:00	0
31997	99	81	14,57	cyclictest	0	-21	swapper/1	09:40:12	1
31997	99	81	13,56	cyclictest	0	-21	swapper/1	12:35:14	1
31997	99	81	12,58	cyclictest	0	-21	swapper/1	12:30:11	1
31997	99	81	12,58	cyclictest	0	-21	swapper/1	10:00:13	1
31997	99	81	11,59	cyclictest	0	-21	swapper/1	11:50:13	1
31993	99	81	5,64	cyclictest	7153	-21	apt-get	07:30:12	0
31993	99	81	26,49	cyclictest	512	-21	apt-get	08:40:13	0
31997	99	80	7,59	cyclictest	7778	-21	apt-get	12:00:14	1
31997	99	80	14,57	cyclictest	0	-21	swapper/1	10:30:10	1
31997	99	80	13,57	cyclictest	0	-21	swapper/1	07:35:14	1
31997	99	79	7,58	cyclictest	22252	-21	apt-get	08:10:23	1
31997	99	79	7,58	cyclictest	22252	-21	apt-get	08:10:23	1
31997	99	79	7,56	cyclictest	9735	-21	apt-get	09:05:13	1
31997	99	79	13,56	cyclictest	0	-21	swapper/1	10:55:12	1
31997	99	79	13,55	cyclictest	0	-21	swapper/1	09:25:13	1
31997	99	79	13,54	cyclictest	0	-21	swapper/1	11:00:14	1
31997	99	79	13,54	cyclictest	0	-21	swapper/1	10:45:13	1
31993	99	79	5,57	cyclictest	31324	-21	apt-get	08:35:13	0
31997	99	78	7,56	cyclictest	5413	-21	apt-get	07:25:12	1
31997	99	78	13,53	cyclictest	0	-21	swapper/1	11:30:12	1
31997	99	78	13,53	cyclictest	0	-21	swapper/1	11:05:15	1
31997	99	78	12,51	cyclictest	0	-21	swapper/1	07:15:11	1
31997	99	78	11,56	cyclictest	0	-21	swapper/1	10:10:13	1
31993	99	78	7,55	cyclictest	18288	-21	apt-get	12:30:11	0
31993	99	78	6,58	cyclictest	0	-21	swapper/0	11:00:11	0
31993	99	78	6,57	cyclictest	0	-21	swapper/0	10:10:12	0
31993	99	78	6,56	cyclictest	4547	-21	apt-get	10:20:12	0
31993	99	78	4,68	cyclictest	0	-21	swapper/0	08:50:09	0
31993	99	78	27,44	cyclictest	28188	-21	diskstats	08:25:22	0
31997	99	77	6,55	cyclictest	11304	-21	apt-get	12:10:12	1
31997	99	77	24,47	cyclictest	3629	-21	grep	08:45:33	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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