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2026-03-30 - 16:59
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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 rackbslot7.osadl.org (updated Mon Mar 30, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22113991233,90cyclictest4842-21apt-get10:09:261
22113991213,91cyclictest15616-21ssh12:14:351
22113991213,91cyclictest15616-21ssh12:14:351
22113991114,72cyclictest18754-21apt-get12:19:291
221059911152,12cyclictest11188-21kworker/u17:3+xprtiod12:08:000
22120991064,42cyclictest21973-21apt-get12:24:262
22113991066,87cyclictest9871-21kworker/u19:0+flush-179:009:24:331
2168321047,16sleep20-21swapper/207:00:402
2168321047,16sleep20-21swapper/207:00:402
22113991033,90cyclictest2041-21apt-get07:39:271
2614421000,7sleep30-21swapper/310:44:353
2614421000,7sleep30-21swapper/310:44:353
221209910037,9cyclictest0-21swapper/211:29:312
221209910037,9cyclictest0-21swapper/211:29:312
22113991004,66cyclictest3324-21apt-get11:54:261
22120999934,11cyclictest0-21swapper/208:19:442
22120999731,12cyclictest0-21swapper/210:39:442
22120999629,12cyclictest0-21swapper/210:13:512
22120999528,12cyclictest0-21swapper/212:20:152
22113999512,73cyclictest19079-21apt-get09:39:271
22113999512,73cyclictest19079-21apt-get09:39:271
22120999436,8cyclictest0-21swapper/207:54:152
22120999431,11cyclictest0-21swapper/209:29:302
22120999343,41cyclictest0-21swapper/210:19:402
22120999335,50cyclictest0-21swapper/208:54:432
2212099932,33cyclictest9098-21latency_hist12:04:142
22120999235,8cyclictest0-21swapper/208:54:152
2212099923,36cyclictest907-21idleruntime09:09:352
2212099923,35cyclictest6964-21irqstats09:19:372
22120999232,12cyclictest0-21swapper/208:09:342
22120999226,12cyclictest0-21swapper/209:37:002
2212099922,35cyclictest1641-21apt-key07:39:132
2212099922,35cyclictest1641-21apt-key07:39:132
2211399928,74cyclictest31018-21apt-get07:29:271
2211399928,64cyclictest5497-21apt-get07:49:301
22120999171,14cyclictest18599-21latency_hist12:19:152
22120999171,14cyclictest18599-21latency_hist12:19:152
2212099913,38cyclictest20056-21forks10:34:322
2212099913,32cyclictest13188-21ssh12:09:472
22120999126,10cyclictest0-21swapper/210:29:452
2212099912,32cyclictest658-21grep11:50:332
2212099912,31cyclictest24833-21latency_hist09:49:132
2211399913,66cyclictest21432-21apt-get12:24:261
22120999037,13cyclictest25686-21sh09:49:432
22120999035,8cyclictest0-21swapper/212:29:382
2212099903,33cyclictest3229-21cat10:59:462
2212099903,29cyclictest18611-21grep08:29:332
22120999025,11cyclictest0-21swapper/211:59:142
2212099893,34cyclictest24888-21latency_hist08:49:132
2212099893,34cyclictest24888-21latency_hist08:49:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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