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Default latency plot of system in rack #3, slot #6

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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
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 May 14, 2026 00:45:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
12415	2	105	0,5	chrt	12418	-21	grep	22:45:25	1
31434	2	103	32,23	sleep1	0	-21	swapper/1	19:06:05	1
31448	2	95	22,27	sleep0	0	-21	swapper/0	19:06:14	0
27874	2	94	0,6	chrt	27877	-21	sed	23:30:02	0
31988	99	93	76,10	cyclictest	26	-21	ksoftirqd/1	22:35:12	1
31988	99	93	76,10	cyclictest	26	-21	ksoftirqd/1	22:35:11	1
31988	99	92	67,12	cyclictest	26	-21	ksoftirqd/1	21:35:12	1
31988	99	91	67,11	cyclictest	26	-21	ksoftirqd/1	21:45:14	1
31988	99	88	57,20	cyclictest	26	-21	ksoftirqd/1	21:10:28	1
31988	99	85	57,16	cyclictest	26	-21	ksoftirqd/1	00:20:14	1
31988	99	83	54,19	cyclictest	26	-21	ksoftirqd/1	20:10:13	1
31988	99	82	55,18	cyclictest	26	-21	ksoftirqd/1	00:05:12	1
31984	99	81	7,57	cyclictest	0	-21	swapper/0	19:45:13	0
31988	99	79	55,17	cyclictest	26	-21	ksoftirqd/1	23:10:14	1
31988	99	76	49,18	cyclictest	26	-21	ksoftirqd/1	00:35:14	1
31984	99	75	35,23	cyclictest	14	-21	ksoftirqd/0	23:05:32	0
31984	99	75	32,27	cyclictest	14	-21	ksoftirqd/0	20:48:42	0
31984	99	75	32,27	cyclictest	14	-21	ksoftirqd/0	20:48:42	0
31988	99	73	26,41	cyclictest	26	-21	ksoftirqd/1	23:25:28	1
31988	99	73	25,11	cyclictest	26	-21	ksoftirqd/1	19:40:19	1
31988	99	72	16,48	cyclictest	25	1	rcuc/1	20:10:00	1
31988	99	71	44,19	cyclictest	26	-21	ksoftirqd/1	20:50:12	1
31988	99	71	42,18	cyclictest	0	-21	swapper/1	22:20:13	1
31988	99	71	23,43	cyclictest	26	-21	ksoftirqd/1	00:15:28	1
31988	99	71	23,43	cyclictest	26	-21	ksoftirqd/1	00:15:28	1
31984	99	71	5,22	cyclictest	820	-21	apt-get	23:45:16	0
31988	99	70	42,17	cyclictest	26	-21	ksoftirqd/1	22:40:13	1
31988	99	70	17,16	cyclictest	26	-21	ksoftirqd/1	20:40:01	1
31988	99	69	44,17	cyclictest	26	-21	ksoftirqd/1	19:25:13	1
31988	99	69	40,20	cyclictest	26	-21	ksoftirqd/1	20:20:12	1
31988	99	69	38,18	cyclictest	0	-21	swapper/1	22:05:15	1
31988	99	69	27,36	cyclictest	26	-21	ksoftirqd/1	21:55:35	1
31988	99	69	20,42	cyclictest	26	-21	ksoftirqd/1	20:45:16	1
31988	99	69	20,42	cyclictest	26	-21	ksoftirqd/1	20:45:16	1
31984	99	69	38,26	cyclictest	503	-21	snmpd	19:40:37	0
31988	99	68	42,15	cyclictest	0	-21	swapper/1	21:15:15	1
31988	99	68	40,16	cyclictest	0	-21	swapper/1	23:15:24	1
31988	99	68	2,17	cyclictest	6459	-21	munin-plugin-st	22:30:01	1
31988	99	68	18,14	cyclictest	26	-21	ksoftirqd/1	22:20:01	1
31988	99	68	18,14	cyclictest	26	-21	ksoftirqd/1	22:20:01	1
31984	99	68	38,9	cyclictest	14	-21	ksoftirqd/0	21:00:17	0
31984	99	68	2,26	cyclictest	19337	-21	taskset	20:02:54	0
31988	99	67	42,14	cyclictest	0	-21	swapper/1	20:00:12	1
31988	99	67	41,16	cyclictest	0	-21	swapper/1	22:10:12	1
31988	99	67	38,17	cyclictest	0	-21	swapper/1	20:30:10	1
31988	99	67	37,18	cyclictest	26	-21	ksoftirqd/1	19:15:12	1
31988	99	67	36,21	cyclictest	0	-21	swapper/1	22:50:12	1
31988	99	67	35,19	cyclictest	0	-21	swapper/1	23:05:12	1
31988	99	67	24,13	cyclictest	26	-21	ksoftirqd/1	00:00:04	1
31988	99	66	39,16	cyclictest	0	-21	swapper/1	23:30:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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