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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 May 03, 2026 00:44:58)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
7290	2	666	0,4	sleep0	19	1	irq_work/0	19:05:19	0
29781	2	98	0,6	chrt	29779	-21	grep	20:05:36	0
8166	2	94	16,32	sleep1	0	-21	swapper/1	19:06:46	1
8663	99	88	74,10	cyclictest	26	-21	ksoftirqd/1	00:10:12	1
8663	99	86	27,52	cyclictest	457	-21	dbus-daemon	22:00:00	1
8663	99	85	8,62	cyclictest	29782	-21	apt-get	23:10:14	1
8663	99	85	20,52	cyclictest	0	-21	swapper/1	23:45:12	1
8663	99	85	15,58	cyclictest	0	-21	swapper/1	22:00:13	1
8663	99	85	11,59	cyclictest	0	-21	swapper/1	23:55:13	1
8663	99	84	22,54	cyclictest	8651	-21	cyclictest	19:55:13	1
8663	99	84	18,54	cyclictest	0	-21	swapper/1	20:25:09	1
8663	99	84	15,59	cyclictest	0	-21	swapper/1	22:25:12	1
8663	99	84	14,57	cyclictest	0	-21	swapper/1	20:30:13	1
8663	99	83	7,59	cyclictest	1107	-21	apt-get	21:50:12	1
8663	99	83	68,9	cyclictest	26	-21	ksoftirqd/1	20:20:11	1
8663	99	83	40,32	cyclictest	26	-21	ksoftirqd/1	22:35:14	1
8663	99	83	15,55	cyclictest	0	-21	swapper/1	22:05:23	1
8663	99	83	14,59	cyclictest	0	-21	swapper/1	23:20:12	1
8663	99	83	14,58	cyclictest	0	-21	swapper/1	00:15:13	1
8663	99	82	17,52	cyclictest	0	-21	swapper/1	23:05:23	1
8663	99	82	17,50	cyclictest	0	-21	swapper/1	19:40:24	1
8663	99	82	16,57	cyclictest	0	-21	swapper/1	19:50:13	1
8663	99	82	13,56	cyclictest	0	-21	swapper/1	22:50:11	1
8663	99	82	12,56	cyclictest	0	-21	swapper/1	20:35:12	1
8663	99	82	12,54	cyclictest	0	-21	swapper/1	23:50:15	1
8663	99	81	8,59	cyclictest	27941	-21	apt-get	21:35:14	1
8663	99	81	7,60	cyclictest	13922	-21	apt-get	20:55:11	1
8663	99	81	15,52	cyclictest	0	-21	swapper/1	21:00:15	1
8663	99	81	11,61	cyclictest	0	-21	swapper/1	19:35:13	1
8663	99	80	17,54	cyclictest	0	-21	swapper/1	00:00:14	1
8663	99	80	15,56	cyclictest	0	-21	swapper/1	23:25:12	1
8663	99	80	15,56	cyclictest	0	-21	swapper/1	21:05:15	1
8663	99	80	15,51	cyclictest	0	-21	swapper/1	23:15:14	1
8663	99	80	14,57	cyclictest	0	-21	swapper/1	21:45:13	1
8663	99	80	13,57	cyclictest	0	-21	swapper/1	22:30:15	1
8663	99	80	12,58	cyclictest	0	-21	swapper/1	00:05:24	1
8663	99	80	12,57	cyclictest	0	-21	swapper/1	00:35:14	1
8663	99	80	12,55	cyclictest	0	-21	swapper/1	00:20:14	1
8663	99	79	7,59	cyclictest	30601	-21	apt-get	20:10:12	1
8663	99	79	7,59	cyclictest	26200	-21	apt-get	21:30:11	1
8663	99	79	6,59	cyclictest	12757	-21	apt-get	19:20:12	1
8663	99	79	20,52	cyclictest	243	-21	systemd-journal	20:46:28	1
8663	99	79	16,53	cyclictest	0	-21	swapper/1	23:30:23	1
8663	99	79	16,53	cyclictest	0	-21	swapper/1	23:30:23	1
8663	99	79	14,53	cyclictest	0	-21	swapper/1	19:10:14	1
8663	99	79	13,54	cyclictest	0	-21	swapper/1	20:50:14	1
8663	99	79	13,53	cyclictest	0	-21	swapper/1	00:30:14	1
8663	99	79	12,59	cyclictest	0	-21	swapper/1	00:25:13	1
8663	99	78	7,59	cyclictest	21830	-21	apt-get	19:45:14	1
8663	99	78	6,58	cyclictest	20952	-21	apt-get	21:15:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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