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2026-04-04 - 10:37
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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 rackeslot6.osadl.org (updated Sat Apr 04, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1088809910696,8cyclictest203270-21apt-get00:00:000
108880999887,9cyclictest162692-21latency_hist21:55:010
108880999586,7cyclictest120300-21latency_hist19:45:020
108881999081,7cyclictest163187-21kworker/u8:1+flush-179:022:10:171
108881998778,6cyclictest128560-21kworker/u8:3+flush-179:020:30:151
108880998676,7cyclictest175945-21latency_hist22:35:010
108880998577,6cyclictest135388-21latency_hist20:30:010
108880998371,9cyclictest110429-21latency_hist19:15:020
108881998175,4cyclictest154788-21kworker/u8:3+flush-179:021:45:161
108881998072,6cyclictest266-21systemd-journal20:10:001
108881998071,7cyclictest190451-21kworker/u8:3+flush-179:023:30:011
108880997869,7cyclictest266-21systemd-journal20:34:560
108881997765,9cyclictest110446-21apt-get19:15:001
108881997466,6cyclictest196936-21kworker/u8:1+events_unbound00:40:001
108880997466,6cyclictest118705-21latency_hist19:40:010
108880997362,9cyclictest154999-21apt-get21:30:120
108881997265,5cyclictest159554-21kworker/u8:2+flush-179:022:30:241
108881997060,7cyclictest171724-21diskstats22:20:151
108881996755,10cyclictest266-21systemd-journal00:05:011
108881996552,10cyclictest266-21systemd-journal21:15:001
108881996356,5cyclictest125316-21latency_hist20:00:011
108881996353,7cyclictest112254-21kworker/u8:2+flush-179:019:25:201
108881996348,13cyclictest179176-21kworker/u8:0+flush-179:022:55:261
108881996255,5cyclictest189708-21kworker/u8:0+events_unbound23:20:001
108880996256,4cyclictest190451-21kworker/u8:3+flush-179:023:20:150
108880996248,11cyclictest156584-21apt-get21:35:100
108881996154,5cyclictest132456-21kworker/u8:0+flush-179:020:20:251
108880996052,6cyclictest166146-21latency_hist22:05:010
108880996051,7cyclictest125594-21apt-get20:00:120
108881995952,5cyclictest201655-21latency_hist23:55:011
108881995951,6cyclictest122139-21cron19:49:591
108881995751,4cyclictest190451-21kworker/u8:3+flush-179:023:35:151
108881995750,5cyclictest163187-21kworker/u8:1+flush-179:022:00:161
108881995750,5cyclictest112284-21latency_hist19:20:021
108880995747,8cyclictest188921-21apt-get23:15:100
108881995649,5cyclictest266-21systemd-journal19:31:021
108881995649,5cyclictest154720-21kworker/u8:1+flush-179:021:40:001
108880995646,8cyclictest266-21systemd-journal20:40:150
108880995643,11cyclictest266-21systemd-journal22:30:000
108881995552,2cyclictest714-21Xorg23:23:001
108881995548,5cyclictest153410-21apt-get21:25:121
108881995544,9cyclictest207006-21apt-get00:10:101
108881995544,9cyclictest203359-21cat00:00:021
108881995447,5cyclictest149937-21kworker/u8:0+flush-179:022:20:001
108880995433,20cyclictest149461-21timerandwakeup21:10:240
108880995342,8cyclictest1-21systemd00:05:010
108881995144,5cyclictest158480-21diskstats21:40:161
108880995143,6cyclictest510-21rs:main0
108880995141,8cyclictest266-21systemd-journal19:45:110
10888599500,48cyclictest190261-21turbostat23:20:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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