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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 Thu Dec 04, 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
22645	2	95	18,33	sleep1	0	-21	swapper/1	19:07:24	1
23077	99	84	8,60	cyclictest	3025	-21	apt-get	21:15:15	1
23077	99	82	3,72	cyclictest	3107	-21	seq	22:45:19	1
21313	2	82	30,40	sleep0	0	-21	swapper/0	19:05:07	0
23077	99	81	2,72	cyclictest	18907	-21	runrttasks	20:27:13	1
23077	99	79	24,50	cyclictest	17635	-21	cat	21:55:26	1
23077	99	79	11,54	cyclictest	0	-21	swapper/1	19:50:14	1
23077	99	78	28,45	cyclictest	448	-21	dbus-daemon	19:40:01	1
23077	99	78	28,45	cyclictest	448	-21	dbus-daemon	19:40:00	1
23077	99	78	13,52	cyclictest	0	-21	swapper/1	21:45:15	1
23077	99	78	11,57	cyclictest	0	-21	swapper/1	00:20:15	1
23077	99	77	7,60	cyclictest	27210	-21	apt-get	19:20:14	1
23077	99	77	10,53	cyclictest	0	-21	swapper/1	00:00:13	1
23077	99	77	10,52	cyclictest	0	-21	swapper/1	23:10:14	1
23077	99	76	7,62	cyclictest	19118	-21	apt-get	23:30:24	1
23077	99	76	7,57	cyclictest	10579	-21	apt-get	20:05:15	1
23077	99	76	11,51	cyclictest	504	-21	snmpd	23:45:14	1
23077	99	75	9,52	cyclictest	0	-21	swapper/1	20:45:12	1
23077	99	75	7,54	cyclictest	17074	-21	apt-get	23:25:13	1
23077	99	75	7,53	cyclictest	31918	-21	apt-get	21:05:24	1
23077	99	75	36,34	cyclictest	0	-21	swapper/1	20:55:49	1
23077	99	75	12,53	cyclictest	0	-21	swapper/1	22:05:16	1
23077	99	75	12,49	cyclictest	0	-21	swapper/1	19:10:13	1
23077	99	75	11,53	cyclictest	0	-21	swapper/1	20:30:12	1
23077	99	75	10,55	cyclictest	0	-21	swapper/1	23:15:24	1
23077	99	74	7,56	cyclictest	26150	-21	apt-get	23:50:13	1
23077	99	74	7,53	cyclictest	8055	-21	apt-get	00:30:23	1
23077	99	74	7,52	cyclictest	1868	-21	apt-get	19:40:12	1
23077	99	74	12,49	cyclictest	0	-21	swapper/1	20:10:13	1
23077	99	74	11,55	cyclictest	0	-21	swapper/1	23:00:15	1
23077	99	74	10,52	cyclictest	0	-21	swapper/1	22:30:13	1
23077	99	74	10,51	cyclictest	0	-21	swapper/1	23:55:14	1
23077	99	74	10,50	cyclictest	0	-21	swapper/1	22:55:13	1
23077	99	74	10,50	cyclictest	0	-21	swapper/1	20:35:14	1
23077	99	73	7,56	cyclictest	4789	-21	apt-get	21:20:15	1
23077	99	73	6,55	cyclictest	29880	-21	apt-get	21:00:14	1
23077	99	73	6,54	cyclictest	26381	-21	apt-get	20:50:16	1
23077	99	73	21,47	cyclictest	448	-21	dbus-daemon	22:30:00	1
23077	99	73	11,49	cyclictest	0	-21	swapper/1	19:30:13	1
23077	99	73	11,49	cyclictest	0	-21	swapper/1	19:15:15	1
23077	99	73	10,53	cyclictest	0	-21	swapper/1	23:35:15	1
23077	99	73	10,51	cyclictest	0	-21	swapper/1	23:40:16	1
23077	99	73	10,50	cyclictest	0	-21	swapper/1	22:50:13	1
23077	99	73	10,50	cyclictest	0	-21	swapper/1	22:50:12	1
23077	99	73	10,49	cyclictest	0	-21	swapper/1	21:35:12	1
23077	99	73	10,48	cyclictest	0	-21	swapper/1	21:10:13	1
23071	99	73	42,17	cyclictest	4280	-21	apt-get	00:20:15	0
23077	99	72	9,52	cyclictest	0	-21	swapper/1	21:30:16	1
23077	99	72	7,53	cyclictest	2522	-21	apt-get	00:15:15	1
23077	99	72	2,65	cyclictest	19605	-21	processes	22:00:32	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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