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2025-12-13 - 06:45
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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 rack9slot2.osadl.org (updated Sat Dec 13, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
985299251244,4cyclictest306-21awk3
984499250247,2cyclictest0-21swapper/11
96002249212,25sleep20-21swapper/22
85412237196,16sleep00-21swapper/00
96662234198,24sleep30-21swapper/33
95592232195,25sleep10-21swapper/11
984899199192,4cyclictest32729-21apt-get2
1971721350,1sleep30-21swapper/33
984099117112,2cyclictest0-21swapper/00
54242620,1sleep20-21swapper/22
54242620,1sleep20-21swapper/22
239062570,1sleep10-21swapper/11
168672490,3sleep228-21ksoftirqd/22
103792460,1sleep310382-21awk3
9848994314,17cyclictest10191-21awk2
136602430,1sleep20-21swapper/22
9848993911,16cyclictest662-21runrttasks2
317362350,1sleep331742-21head3
9848993314,9cyclictest0-21swapper/22
9848993211,18cyclictest27406-21if_enp3s02
984899319,19cyclictest29620-21wc2
984899312,26cyclictest27010-21grep2
9848993111,17cyclictest10676-21hostname2
9848993110,19cyclictest10130-21cut2
9848993110,18cyclictest13542-21basename2
984899310,28cyclictest18954-21cat2
984899309,19cyclictest6623-21expr2
984899309,18cyclictest24502-21ls2
9848993015,13cyclictest31000-21uname2
9848993012,15cyclictest24071-21grep2
9848993010,17cyclictest13306-21grep2
984899300,4cyclictest21103-21/usr/sbin/munin2
984899299,18cyclictest15706-21apt-get2
984899299,17cyclictest1717-21ls2
984899291,25cyclictest1019-21aten2.4-expect2
9848992912,15cyclictest32205-21awk2
9848992911,15cyclictest27750-21basename2
985299286,19cyclictest571-21gdbus3
984899288,17cyclictest27409-21unixbench-2d2
984899287,18cyclictest4452-21cat2
9848992812,14cyclictest7996-21cat2
9848992812,13cyclictest29548-21cstates2
9848992811,15cyclictest662-21runrttasks2
984899280,4cyclictest3628-21apt-get2
984899280,4cyclictest21142-21users2
984899280,3cyclictest17122-21diskstats2
984899279,16cyclictest24204-21users2
984899279,15cyclictest517-21dbus-daemon2
984899277,17cyclictest31394-21grep2
984899276,18cyclictest14261-21cat2
9848992710,14cyclictest4299-21unixbench_singl2
9848992710,14cyclictest4299-21unixbench_singl2
984899270,3cyclictest15102-21diskstats2
984899270,3cyclictest10350-21memory2
985299264,19cyclictest35-21ksoftirqd/33
984899267,16cyclictest2445-21latency_hist2
984899266,3cyclictest15269-21sed2
9848992612,11cyclictest662-21runrttasks2
984899260,4cyclictest16851-21df2
984899260,23cyclictest26203-21vmstat2
984899260,23cyclictest20972-21cat2
984899259,13cyclictest305962chrt2
984899257,16cyclictest7089-21latency_hist2
984899257,15cyclictest296372chrt2
984899256,16cyclictest9964-21unixbench_multi2
984899256,16cyclictest13587-21/usr/sbin/munin2
9848992510,13cyclictest6675-21aten2_r9power_p2
984099251,11cyclictest197182which0
984899249,12cyclictest20962-21cpuspeed_turbos2
984899247,15cyclictest24846-21find2
984899247,14cyclictest25882-21ls2
984899241,21cyclictest0-21swapper/22
9848992410,12cyclictest662-21runrttasks2
984899240,22cyclictest6553-21ps2
984899240,21cyclictest11748-21taskset2
984499242,19cyclictest30202-21grep1
985299233,17cyclictest5787-21sendmail-mta3
985299233,17cyclictest5787-21sendmail-mta3
985299232,18cyclictest17320-21sendmail-mta3
985299231,4cyclictest517-21dbus-daemon3
985299231,19cyclictest515-21avahi-daemon3
985299231,19cyclictest340-21systemd-journal3
985299231,19cyclictest15820-21perf3
984899237,13cyclictest8814-21timerwakeupswit2
984899235,3cyclictest15794-21idleruntime-cro2
984899234,3cyclictest24294-21threads2
984899231,2cyclictest0-21swapper/22
9844992317,4cyclictest21030-21cpuspeed_turbos1
9844992315,5cyclictest16717-21tr1
9844992313,6cyclictest18762-21apt-get1
985299223,17cyclictest1588-21latency_hist3
985299222,18cyclictest9058-21latency_hist3
985299221,19cyclictest517-21dbus-daemon3
985299221,19cyclictest517-21dbus-daemon3
985299221,18cyclictest4913-21cat3
985299221,18cyclictest4913-21cat3
985299221,18cyclictest10040-21awk3
984899221,7cyclictest17968-21ls2
984899221,4cyclictest14382-21apt-get2
9844992216,4cyclictest8064-21seq1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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