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2025-12-18 - 12:14
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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
Characteristics of the 50 highest latencies:
System rack7slot1.osadl.org (updated Fri Dec 12, 2025 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
783212358,59sleep30-21swapper/319:08:563
513211151,55sleep00-21swapper/019:05:400
762210951,20sleep20-21swapper/219:08:402
714210353,45sleep10-21swapper/119:08:051
317632600,1sleep222465-21stress22:44:462
999994217,22cyclictest0-21swapper/023:05:360
999994217,22cyclictest0-21swapper/023:05:360
999994015,22cyclictest0-21swapper/022:55:020
999993919,17cyclictest0-21swapper/021:20:020
999993918,18cyclictest0-21swapper/000:25:000
999993916,20cyclictest0-21swapper/021:10:250
999993915,17cyclictest0-21swapper/021:44:180
999993818,17cyclictest0-21swapper/000:25:220
999993817,19cyclictest0-21swapper/023:15:260
999993816,19cyclictest0-21swapper/000:05:220
999993815,21cyclictest0-21swapper/000:15:190
999993815,21cyclictest0-21swapper/000:15:180
999993814,21cyclictest0-21swapper/021:25:000
999993814,21cyclictest0-21swapper/021:25:000
999993813,22cyclictest0-21swapper/021:55:360
999993813,22cyclictest0-21swapper/021:55:350
81452385,13sleep30-21swapper/319:22:443
65482385,13sleep30-21swapper/320:31:403
58442385,13sleep30-21swapper/319:16:433
253222380,1sleep025323-21latency_hist22:30:020
236682385,13sleep30-21swapper/319:57:443
999993717,18cyclictest0-21swapper/023:40:360
999993717,18cyclictest0-21swapper/023:40:360
999993717,17cyclictest0-21swapper/022:10:170
999993715,15cyclictest0-21swapper/022:30:320
999993715,15cyclictest0-21swapper/022:30:310
999993714,20cyclictest0-21swapper/021:45:350
999993714,20cyclictest0-21swapper/021:45:350
22772375,13sleep30-21swapper/320:23:063
175652375,13sleep30-21swapper/320:56:033
169732375,13sleep20-21swapper/219:42:152
99999364,29cyclictest0-21swapper/000:30:170
999993617,17cyclictest0-21swapper/022:05:010
999993617,17cyclictest0-21swapper/022:05:000
999993617,17cyclictest0-21swapper/021:35:350
999993617,17cyclictest0-21swapper/000:00:370
999993617,16cyclictest0-21swapper/023:45:130
999993617,16cyclictest0-21swapper/023:45:120
999993615,18cyclictest0-21swapper/023:00:220
999993615,18cyclictest0-21swapper/023:00:220
323002365,12sleep30-21swapper/320:15:333
29732365,12sleep20-21swapper/219:13:012
236762365,12sleep10-21swapper/119:57:501
222452365,12sleep20-21swapper/221:08:242
110532365,12sleep10-21swapper/120:42:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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