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2025-12-12 - 10:31
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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 100 highest latencies:
System rack8slot4.osadl.org (updated Fri Dec 12, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18212172267186,24sleep40-21swapper/419:09:564
18189742229172,18sleep60-21swapper/619:05:406
18210462228170,18sleep70-21swapper/719:07:347
18210782217185,21sleep10-21swapper/119:08:001
18211852216187,18sleep50-21swapper/519:09:335
18210122215187,18sleep30-21swapper/319:07:063
18189432215181,22sleep20-21swapper/219:05:122
18211062214182,20sleep00-21swapper/019:08:240
1821418996012,24cyclictest0-21swapper/300:38:303
182142599320,31cyclictest3820478-21systemd-journal19:15:005
182143399310,3cyclictest1947793-21sh23:00:017
182143399310,30cyclictest1860237-21dump-pmu-power20:20:007
182141399310,30cyclictest1900977-21awk21:35:001
1821409993130,1cyclictest0-21swapper/000:38:300
1821409993129,1cyclictest0-21swapper/019:25:000
182140999310,3cyclictest3820478-21systemd-journal20:00:000
182140999310,2cyclictest782-21dbus-daemon00:00:000
182143399300,29cyclictest0-21swapper/721:30:007
182143399300,29cyclictest0-21swapper/721:30:007
1821425993027,2cyclictest1881785-21cron21:00:005
182142599300,29cyclictest0-21swapper/521:35:015
1821420993027,2cyclictest1906609-21dump-pmu-power21:45:004
1821418993027,2cyclictest1824000-21dump-pmu-power19:15:003
1821415993028,1cyclictest1890376-21apt-get21:15:562
182141399300,2cyclictest3820478-21systemd-journal20:50:001
182141399300,2cyclictest1903899-21dump-pmu-power21:40:001
182141399300,29cyclictest1917396-21munin-run22:05:001
182140999300,29cyclictest1-21systemd00:20:000
182143399290,28cyclictest1887685-21apt-get21:10:547
182143399290,28cyclictest0-21swapper/722:00:557
182143399290,28cyclictest0-21swapper/719:40:557
182143399290,28cyclictest0-21swapper/700:20:557
182143099290,28cyclictest1909777-21apt-get21:50:586
182143099290,28cyclictest1884536-21awk21:05:006
182143099290,28cyclictest0-21swapper/622:45:006
182143099290,28cyclictest0-21swapper/621:20:576
182142099290,28cyclictest1953673-21apt-get23:10:564
182141899290,29cyclictest1994661-21apt-get00:25:573
182141899290,28cyclictest1920553-21apt-get22:10:543
1821415992927,1cyclictest0-21swapper/222:40:542
1821415992927,1cyclictest0-21swapper/221:20:572
182141599290,28cyclictest0-21swapper/223:50:552
182141599290,28cyclictest0-21swapper/219:20:562
1821413992927,1cyclictest1844076-21apt19:50:001
182141399290,1cyclictest1956360-21apt-get23:15:541
182141399290,1cyclictest1895569-21munin-run21:25:001
182141399290,1cyclictest0-21swapper/122:20:541
1821409992929,0cyclictest221rcuc/022:50:570
1821409992927,1cyclictest0-21swapper/021:05:590
1821409992927,1cyclictest0-21swapper/020:45:000
182140999290,28cyclictest0-21swapper/022:55:020
182140999290,28cyclictest0-21swapper/021:40:560
182140999290,28cyclictest0-21swapper/021:30:550
182140999290,28cyclictest0-21swapper/019:25:010
1821433992826,1cyclictest0-21swapper/723:15:547
1821433992826,1cyclictest0-21swapper/719:55:547
182143399280,0cyclictest0-21swapper/721:45:557
182143099280,27cyclictest0-21swapper/621:15:566
1821425992827,1cyclictest1871515-21apt-get20:40:535
1821425992827,1cyclictest1852643-21apt-get20:05:555
1821425992827,1cyclictest0-21swapper/519:25:545
1821425992826,1cyclictest1849458-21apt20:00:005
1821425992824,3cyclictest1991208-21latency_hist00:20:005
182142599280,28cyclictest1920556-21http22:10:545
182142599280,28cyclictest1896043-21http21:25:565
182142599280,28cyclictest1896043-21http21:25:565
182142599280,28cyclictest0-21swapper/522:55:555
182142599280,28cyclictest0-21swapper/522:45:525
182142599280,28cyclictest0-21swapper/522:35:015
182142599280,28cyclictest0-21swapper/522:15:565
182142599280,28cyclictest0-21swapper/520:55:005
182142599280,28cyclictest0-21swapper/520:00:535
182142599280,0cyclictest0-21swapper/500:05:565
1821420992827,1cyclictest0-21swapper/421:10:544
1821420992826,1cyclictest1993918-21dump-pmu-power00:25:004
1821420992826,1cyclictest1950511-21dump-pmu-power23:05:014
1821420992826,1cyclictest1841861-21apt-get19:45:534
1821418992827,1cyclictest0-21swapper/320:45:563
1821418992826,1cyclictest1942641-21http22:50:583
1821415992828,0cyclictest0-21swapper/200:35:572
1821415992826,1cyclictest0-21swapper/221:30:542
1821415992825,2cyclictest1953194-21sh23:10:012
182141599280,0cyclictest0-21swapper/223:55:562
182141599280,0cyclictest0-21swapper/222:15:572
1821413992828,0cyclictest0-21swapper/100:20:551
1821413992827,1cyclictest0-21swapper/100:05:001
1821413992826,1cyclictest0-21swapper/121:00:571
182141399280,0cyclictest0-21swapper/120:55:551
1821409992828,0cyclictest0-21swapper/020:25:570
182140999280,28cyclictest0-21swapper/021:25:550
182140999280,28cyclictest0-21swapper/021:25:550
1821433992727,0cyclictest0-21swapper/723:45:547
1821433992727,0cyclictest0-21swapper/720:25:577
1821433992727,0cyclictest0-21swapper/719:10:557
1821433992725,1cyclictest3820478-21systemd-journal23:15:017
182143399270,0cyclictest0-21swapper/722:10:007
1821430992727,0cyclictest0-21swapper/622:05:586
1821430992727,0cyclictest0-21swapper/620:00:536
1821430992726,1cyclictest1844553-21apt-get19:50:556
182143099270,0cyclictest0-21swapper/623:15:536
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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