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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 Mar 15, 2026 00:45:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
17762	2	227	0,13	sleep1	26	-21	ksoftirqd/1	19:10:01	1
17762	2	227	0,13	sleep1	26	-21	ksoftirqd/1	19:10:01	1
16813	2	95	26,19	sleep0	0	-21	swapper/0	19:05:25	0
16813	2	95	26,19	sleep0	0	-21	swapper/0	19:05:24	0
17842	99	87	58,17	cyclictest	26	-21	ksoftirqd/1	22:30:11	1
17842	99	86	7,69	cyclictest	32438	-21	apt-get	19:50:11	1
17842	99	86	14,57	cyclictest	0	-21	swapper/1	00:25:14	1
17842	99	85	7,64	cyclictest	25414	-21	apt-get	19:30:14	1
17842	99	85	17,55	cyclictest	0	-21	swapper/1	20:50:13	1
17842	99	84	8,64	cyclictest	32523	-21	apt-get	22:50:16	1
17842	99	82	8,64	cyclictest	12672	-21	apt-get	23:25:11	1
17842	99	82	6,66	cyclictest	32321	-21	apt-get	00:20:13	1
17842	99	82	16,52	cyclictest	0	-21	swapper/1	21:05:13	1
17842	99	82	14,54	cyclictest	0	-21	swapper/1	23:45:12	1
17842	99	81	53,17	cyclictest	26	-21	ksoftirqd/1	00:15:13	1
17842	99	81	50,20	cyclictest	26	-21	ksoftirqd/1	23:50:13	1
17842	99	81	17,53	cyclictest	0	-21	swapper/1	20:30:14	1
17842	99	80	8,57	cyclictest	23675	-21	apt-get	19:25:16	1
17842	99	80	8,57	cyclictest	23675	-21	apt-get	19:25:15	1
17842	99	80	49,20	cyclictest	26	-21	ksoftirqd/1	20:20:24	1
17842	99	80	49,20	cyclictest	26	-21	ksoftirqd/1	20:20:24	1
17842	99	80	18,48	cyclictest	0	-21	swapper/1	19:20:13	1
17842	99	80	15,54	cyclictest	0	-21	swapper/1	19:55:13	1
17842	99	80	15,53	cyclictest	0	-21	swapper/1	21:20:11	1
17842	99	80	14,53	cyclictest	0	-21	swapper/1	21:35:14	1
17842	99	80	14,52	cyclictest	0	-21	swapper/1	00:10:13	1
17838	99	80	8,12	cyclictest	0	-21	swapper/0	20:45:11	0
17842	99	79	6,61	cyclictest	10931	-21	apt-get	23:20:13	1
17842	99	79	17,48	cyclictest	0	-21	swapper/1	21:30:14	1
17842	99	79	15,52	cyclictest	0	-21	swapper/1	20:05:23	1
17842	99	79	14,54	cyclictest	0	-21	swapper/1	00:05:23	1
17842	99	78	7,58	cyclictest	9175	-21	apt-get	23:15:17	1
17842	99	78	7,58	cyclictest	14071	-21	apt-get	22:00:13	1
17842	99	78	7,56	cyclictest	5110	-21	apt-get	00:35:15	1
17842	99	78	6,57	cyclictest	3370	-21	apt-get	00:30:11	1
17842	99	78	16,52	cyclictest	0	-21	swapper/1	20:55:13	1
17842	99	78	14,51	cyclictest	0	-21	swapper/1	19:40:13	1
17842	99	78	14,51	cyclictest	0	-21	swapper/1	00:00:14	1
17842	99	77	6,59	cyclictest	13187	-21	apt-get	20:25:14	1
17842	99	77	18,49	cyclictest	0	-21	swapper/1	22:35:23	1
17842	99	77	16,52	cyclictest	0	-21	swapper/1	23:30:12	1
17842	99	77	15,50	cyclictest	0	-21	swapper/1	20:00:21	1
17842	99	77	15,50	cyclictest	0	-21	swapper/1	19:10:14	1
17842	99	76	7,55	cyclictest	21408	-21	apt-get	22:20:23	1
17842	99	76	7,52	cyclictest	23183	-21	apt-get	23:55:12	1
17842	99	76	6,58	cyclictest	5337	-21	apt-get	23:05:12	1
17842	99	76	16,48	cyclictest	0	-21	swapper/1	23:00:15	1
17842	99	76	16,47	cyclictest	0	-21	swapper/1	21:00:12	1
17842	99	76	16,47	cyclictest	0	-21	swapper/1	21:00:11	1
17842	99	76	15,48	cyclictest	0	-21	swapper/1	22:25:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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