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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 12, 2025 00:45:01)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
27859	99	95	5,60	cyclictest	0	-21	swapper/0	00:10:33	0
27375	2	92	27,18	sleep1	0	-21	swapper/1	19:06:48	1
27864	99	90	16,63	cyclictest	0	-21	swapper/1	22:30:14	1
27864	99	89	16,62	cyclictest	0	-21	swapper/1	23:30:14	1
27864	99	87	15,57	cyclictest	0	-21	swapper/1	00:15:24	1
27864	99	85	14,57	cyclictest	0	-21	swapper/1	00:05:15	1
27864	99	85	14,55	cyclictest	0	-21	swapper/1	23:10:16	1
27864	99	84	15,60	cyclictest	0	-21	swapper/1	21:05:17	1
27864	99	84	14,58	cyclictest	0	-21	swapper/1	19:30:14	1
27864	99	84	14,57	cyclictest	0	-21	swapper/1	20:10:13	1
27859	99	84	39,39	cyclictest	0	-21	swapper/0	23:40:12	0
27864	99	83	7,58	cyclictest	21784	-21	apt-get	23:25:15	1
27859	99	83	6,60	cyclictest	2185	-21	apt-get	22:30:15	0
27864	99	82	6,62	cyclictest	3929	-21	apt-get	22:35:16	1
27864	99	82	6,62	cyclictest	3929	-21	apt-get	22:35:16	1
27859	99	82	35,42	cyclictest	14471	-21	chrt	23:03:53	0
27859	99	82	2,73	cyclictest	13256	-21	chrt	21:28:32	0
27864	99	81	16,59	cyclictest	0	-21	swapper/1	20:20:17	1
27864	99	81	15,56	cyclictest	0	-21	swapper/1	20:00:17	1
27864	99	81	14,57	cyclictest	0	-21	swapper/1	22:50:14	1
27864	99	81	11,56	cyclictest	504	-21	snmpd	00:35:14	1
27864	99	80	7,63	cyclictest	11250	-21	apt-get	22:55:13	1
27864	99	80	5,65	cyclictest	10734	-21	apt-get	00:25:13	1
27864	99	80	21,50	cyclictest	0	-21	swapper/1	20:05:17	1
27864	99	80	21,50	cyclictest	0	-21	swapper/1	20:05:17	1
27864	99	80	14,56	cyclictest	0	-21	swapper/1	23:15:13	1
27864	99	80	14,56	cyclictest	0	-21	swapper/1	21:40:14	1
27864	99	80	14,56	cyclictest	0	-21	swapper/1	20:25:13	1
27864	99	79	26,47	cyclictest	21475	-21	sshd	23:23:38	1
27864	99	79	14,58	cyclictest	0	-21	swapper/1	00:20:15	1
27864	99	79	14,53	cyclictest	0	-21	swapper/1	23:45:13	1
27864	99	79	14,52	cyclictest	0	-21	swapper/1	21:55:14	1
27864	99	79	13,52	cyclictest	0	-21	swapper/1	23:35:12	1
26102	2	79	27,40	sleep0	0	-21	swapper/0	19:05:05	0
27864	99	78	9,54	cyclictest	5191	-21	apt-get	00:10:14	1
27864	99	78	7,60	cyclictest	29371	-21	apt-get	22:15:14	1
27864	99	78	7,58	cyclictest	32290	-21	apt-get	23:55:13	1
27864	99	78	7,55	cyclictest	7780	-21	apt-get	22:45:15	1
27864	99	78	6,62	cyclictest	18864	-21	apt-get	21:45:14	1
27864	99	78	6,61	cyclictest	30555	-21	apt-get	23:50:13	1
27864	99	78	18,53	cyclictest	0	-21	swapper/1	00:00:14	1
27864	99	78	16,54	cyclictest	0	-21	swapper/1	19:55:17	1
27864	99	78	14,54	cyclictest	0	-21	swapper/1	19:45:17	1
27864	99	78	14,53	cyclictest	0	-21	swapper/1	20:40:20	1
27864	99	78	14,52	cyclictest	0	-21	swapper/1	21:20:25	1
27859	99	78	6,59	cyclictest	23523	-21	apt-get	23:30:15	0
27859	99	78	5,62	cyclictest	3016	-21	apt-get	19:30:13	0
27859	99	78	5,61	cyclictest	3401	-21	apt-get	00:05:14	0
27859	99	78	5,61	cyclictest	17074	-21	apt-get	20:10:14	0
27864	99	77	6,58	cyclictest	12473	-21	apt-get	00:30:16	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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