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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 Sat Mar 14, 2026 00:45:00)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
29433	99	111	13,30	cyclictest	0	-21	swapper/0	23:30:11	0
29439	99	108	77,18	cyclictest	26	-21	ksoftirqd/1	20:30:11	1
29439	99	107	55,42	cyclictest	0	-21	swapper/1	23:40:14	1
29433	99	105	11,30	cyclictest	0	-21	swapper/0	20:15:13	0
29439	99	102	61,28	cyclictest	26	-21	ksoftirqd/1	20:00:13	1
29439	99	100	59,28	cyclictest	26	-21	ksoftirqd/1	20:50:11	1
29439	99	99	60,26	cyclictest	26	-21	ksoftirqd/1	19:45:12	1
29439	99	99	50,36	cyclictest	26	-21	ksoftirqd/1	23:50:15	1
29439	99	97	54,32	cyclictest	26	-21	ksoftirqd/1	20:45:12	1
29439	99	97	51,33	cyclictest	26	-21	ksoftirqd/1	22:15:15	1
29439	99	97	48,36	cyclictest	26	-21	ksoftirqd/1	19:20:13	1
29439	99	97	47,36	cyclictest	26	-21	ksoftirqd/1	00:20:14	1
29439	99	96	54,31	cyclictest	26	-21	ksoftirqd/1	21:15:12	1
29439	99	94	11,68	cyclictest	0	-21	swapper/1	22:45:17	1
29439	99	92	45,35	cyclictest	26	-21	ksoftirqd/1	23:25:14	1
29439	99	92	44,36	cyclictest	26	-21	ksoftirqd/1	00:25:13	1
29439	99	92	43,30	cyclictest	26	-21	ksoftirqd/1	19:10:23	1
29439	99	92	12,65	cyclictest	0	-21	swapper/1	23:05:24	1
29439	99	90	42,34	cyclictest	26	-21	ksoftirqd/1	19:35:13	1
29439	99	90	12,63	cyclictest	0	-21	swapper/1	22:20:15	1
29439	99	90	12,62	cyclictest	0	-21	swapper/1	21:30:11	1
29439	99	90	12,61	cyclictest	0	-21	swapper/1	22:05:22	1
29439	99	90	12,61	cyclictest	0	-21	swapper/1	19:55:14	1
29439	99	90	12,59	cyclictest	0	-21	swapper/1	22:50:15	1
29439	99	89	9,63	cyclictest	500	-21	snmpd	19:15:14	1
29439	99	89	11,63	cyclictest	0	-21	swapper/1	23:55:23	1
29439	99	89	11,63	cyclictest	0	-21	swapper/1	21:45:14	1
29439	99	89	11,63	cyclictest	0	-21	swapper/1	21:45:13	1
29439	99	88	43,30	cyclictest	26	-21	ksoftirqd/1	23:45:13	1
29439	99	88	41,33	cyclictest	26	-21	ksoftirqd/1	19:50:16	1
28966	2	88	25,16	sleep1	0	-21	swapper/1	19:07:15	1
29439	99	87	7,59	cyclictest	7984	-21	diskmemload	21:10:13	1
29439	99	87	7,59	cyclictest	7984	-21	diskmemload	21:10:12	1
29439	99	87	42,30	cyclictest	26	-21	ksoftirqd/1	20:40:14	1
29439	99	87	11,58	cyclictest	0	-21	swapper/1	21:25:13	1
29439	99	87	10,60	cyclictest	0	-21	swapper/1	00:30:12	1
29439	99	86	7,62	cyclictest	548	-21	runrttasks	20:20:11	1
29439	99	86	34,33	cyclictest	26	-21	ksoftirqd/1	19:25:12	1
29439	99	85	12,57	cyclictest	0	-21	swapper/1	21:20:14	1
29439	99	85	12,54	cyclictest	0	-21	swapper/1	22:35:15	1
29439	99	84	7,58	cyclictest	29498	-21	runrttasks	22:10:12	1
29439	99	83	6,58	cyclictest	0	-21	swapper/1	20:35:10	1
29439	99	82	36,31	cyclictest	0	-21	swapper/1	23:15:11	1
29439	99	81	8,55	cyclictest	0	-21	swapper/1	22:00:10	1
29439	99	81	35,34	cyclictest	0	-21	swapper/1	21:00:24	1
29439	99	80	36,30	cyclictest	0	-21	swapper/1	23:00:10	1
29439	99	80	34,32	cyclictest	0	-21	swapper/1	22:25:14	1
29439	99	80	33,28	cyclictest	0	-21	swapper/1	23:20:10	1
29439	99	80	0,57	cyclictest	0	-21	swapper/1	20:05:10	1
29439	99	79	35,30	cyclictest	0	-21	swapper/1	00:10:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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