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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 Tue Dec 30, 2025 12:45:01)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
17871	99	114	10,85	cyclictest	0	-21	swapper/1	10:30:12	1
17871	99	113	65,33	cyclictest	26	-21	ksoftirqd/1	07:55:14	1
17871	99	112	10,79	cyclictest	0	-21	swapper/1	11:10:13	1
17871	99	108	14,76	cyclictest	0	-21	swapper/1	08:10:13	1
17871	99	108	11,76	cyclictest	0	-21	swapper/1	10:50:15	1
17871	99	108	11,76	cyclictest	0	-21	swapper/1	10:20:13	1
17871	99	108	10,77	cyclictest	0	-21	swapper/1	11:40:15	1
17871	99	107	9,78	cyclictest	0	-21	swapper/1	11:55:13	1
17871	99	107	9,78	cyclictest	0	-21	swapper/1	11:55:12	1
17871	99	107	14,74	cyclictest	0	-21	swapper/1	07:15:14	1
17871	99	107	13,73	cyclictest	0	-21	swapper/1	10:15:10	1
17871	99	107	10,76	cyclictest	0	-21	swapper/1	08:55:13	1
17871	99	106	17,69	cyclictest	0	-21	swapper/1	11:50:27	1
17871	99	106	12,76	cyclictest	0	-21	swapper/1	10:25:15	1
17871	99	106	12,73	cyclictest	0	-21	swapper/1	12:30:14	1
17871	99	106	11,77	cyclictest	0	-21	swapper/1	07:35:13	1
17871	99	106	11,74	cyclictest	0	-21	swapper/1	08:30:13	1
17871	99	105	9,75	cyclictest	0	-21	swapper/1	09:05:13	1
17871	99	105	9,74	cyclictest	0	-21	swapper/1	09:20:14	1
17871	99	105	18,69	cyclictest	0	-21	swapper/1	11:05:15	1
17871	99	105	14,70	cyclictest	0	-21	swapper/1	07:10:14	1
17871	99	105	12,73	cyclictest	0	-21	swapper/1	12:20:13	1
17871	99	105	12,70	cyclictest	0	-21	swapper/1	09:55:11	1
17871	99	105	12,70	cyclictest	0	-21	swapper/1	09:45:13	1
17871	99	105	11,74	cyclictest	0	-21	swapper/1	12:15:13	1
17871	99	105	11,74	cyclictest	0	-21	swapper/1	10:45:25	1
17871	99	105	11,73	cyclictest	0	-21	swapper/1	11:30:15	1
17871	99	105	11,72	cyclictest	0	-21	swapper/1	08:05:18	1
17871	99	105	10,75	cyclictest	0	-21	swapper/1	11:00:15	1
17871	99	104	40,47	cyclictest	26	-21	ksoftirqd/1	12:35:12	1
17871	99	104	17,67	cyclictest	0	-21	swapper/1	08:25:15	1
17871	99	104	14,70	cyclictest	0	-21	swapper/1	08:40:24	1
17871	99	104	13,71	cyclictest	0	-21	swapper/1	12:25:13	1
17871	99	104	12,71	cyclictest	0	-21	swapper/1	10:00:16	1
17871	99	104	12,71	cyclictest	0	-21	swapper/1	10:00:15	1
17871	99	104	11,73	cyclictest	0	-21	swapper/1	09:50:16	1
17871	99	104	11,72	cyclictest	0	-21	swapper/1	07:45:14	1
17871	99	104	10,72	cyclictest	0	-21	swapper/1	08:15:17	1
17871	99	103	16,68	cyclictest	0	-21	swapper/1	10:35:15	1
17871	99	103	13,69	cyclictest	0	-21	swapper/1	08:50:16	1
17871	99	103	12,72	cyclictest	0	-21	swapper/1	09:30:17	1
17871	99	103	12,72	cyclictest	0	-21	swapper/1	07:30:15	1
17871	99	103	12,69	cyclictest	0	-21	swapper/1	07:25:11	1
17871	99	103	10,72	cyclictest	0	-21	swapper/1	12:10:17	1
17867	99	103	74,19	cyclictest	14	-21	ksoftirqd/0	10:35:12	0
17871	99	102	9,71	cyclictest	0	-21	swapper/1	08:45:14	1
17871	99	102	8,74	cyclictest	0	-21	swapper/1	08:20:12	1
17871	99	102	72,18	cyclictest	26	-21	ksoftirqd/1	09:25:15	1
17871	99	102	13,68	cyclictest	0	-21	swapper/1	11:35:15	1
17871	99	102	13,68	cyclictest	0	-21	swapper/1	11:35:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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