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2025-12-03 - 02:38
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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 Tue Dec 02, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
194042255185,25sleep10-21swapper/11
194522246173,25sleep30-21swapper/33
177332243177,52sleep00-21swapper/00
192262230193,24sleep20-21swapper/22
1967499162155,5cyclictest29428-21sendmail-mta1
1968199151145,4cyclictest29416-21munin-run3
1967799136120,14cyclictest29402-21apt-get2
1316821300,2sleep11967499cyclictest1
1966999121115,4cyclictest29426-21awk0
191662760,3sleep31968199cyclictest3
141502500,1sleep30-21swapper/33
19674994914,17cyclictest16378-21cat1
312012480,3sleep10-21swapper/11
1967499483,26cyclictest25017-21apt-get1
1967499481,29cyclictest26836-21chrt1
1967499481,29cyclictest26836-21chrt1
19674994512,18cyclictest20329-21seq1
1967499450,3cyclictest320892chrt1
19674994412,18cyclictest27501-21seq1
19674994412,17cyclictest22366-21seq1
19674994412,17cyclictest21527-21seq1
19674994312,17cyclictest12011-21seq1
1967499430,2cyclictest147122chrt1
255412420,1sleep30-21swapper/33
1967499429,18cyclictest4390-21seq1
1967499428,19cyclictest206552chrt1
1967499427,20cyclictest187752chrt1
149112420,2sleep10-21swapper/11
1967499418,18cyclictest281222chrt1
1967499409,18cyclictest31602-21seq1
1967499406,20cyclictest5418-21seq1
19681993810,9cyclictest26572-21munin-run3
19681993711,9cyclictest4736-21sed3
19681993710,10cyclictest14258-21sed3
1967799373,6cyclictest28-21ksoftirqd/22
1968199369,10cyclictest25807-21sed3
19681993612,9cyclictest2082-21systemd-journal3
19681993611,9cyclictest333-21sed3
1967499361,3cyclictest40222chrt1
1968199357,16cyclictest0-21swapper/33
1968199356,9cyclictest0-21swapper/33
19681993511,9cyclictest505-21dbus-daemon3
19681993510,9cyclictest9701-21sed3
19677993518,15cyclictest271rcuc/22
1968199349,9cyclictest17299-21chrt3
1968199349,8cyclictest23393-21chrt3
1968199349,10cyclictest5317-21chrt3
1968199348,9cyclictest20872-21taskset3
1968199347,17cyclictest0-21swapper/33
1968199347,16cyclictest0-21swapper/33
1968199346,17cyclictest0-21swapper/33
1968199345,16cyclictest0-21swapper/33
19681993410,9cyclictest27658-21taskset3
19681993410,9cyclictest16151-21chrt3
19681993410,10cyclictest3954-21chrt3
19681993410,10cyclictest16834-21chrt3
1968199339,9cyclictest7066-21chrt3
1968199339,9cyclictest28310-21chrt3
1968199339,9cyclictest28310-21chrt3
1968199336,16cyclictest0-21swapper/33
1968199336,15cyclictest0-21swapper/33
19681993310,9cyclictest27779-21awk3
19681993310,9cyclictest15532-21chrt3
1967499333,22cyclictest28418-21apt-get1
1967499330,2cyclictest30927-21munin-run1
19669993322,3cyclictest9-21ksoftirqd/00
1968199329,9cyclictest6670-21chrt3
1968199329,9cyclictest32691-21chrt3
1968199329,9cyclictest21432-21chrt3
1968199329,9cyclictest10499-21chrt3
1968199329,9cyclictest1012-21chrt3
1968199329,8cyclictest24443-21telnet3
1968199326,16cyclictest0-21swapper/33
1968199326,16cyclictest0-21swapper/33
1968199325,15cyclictest0-21swapper/33
1968199325,15cyclictest0-21swapper/33
19681993210,8cyclictest29169-21timerandwakeup3
1967499322,23cyclictest5653-21apt-get1
1967499322,23cyclictest23260-21apt-get1
19674993214,15cyclictest12933-21grep1
19669993213,4cyclictest9-21ksoftirqd/00
72182310,11sleep09-21ksoftirqd/00
1968199318,9cyclictest31780-21chrt3
1968199318,9cyclictest19092-21timerwakeupswit3
1968199318,9cyclictest12833-21switchtime3
1968199316,8cyclictest0-21swapper/33
1968199315,15cyclictest0-21swapper/33
1968199315,15cyclictest0-21swapper/33
19681993120,5cyclictest22696-21apt-get3
19677993121,2cyclictest28-21ksoftirqd/22
19677993116,3cyclictest28-21ksoftirqd/22
19677993113,4cyclictest28-21ksoftirqd/22
1967499312,23cyclictest4947-21apt-get1
1967499312,23cyclictest13873-21apt-get1
1966999319,4cyclictest9-21ksoftirqd/00
1968199307,9cyclictest0-21swapper/33
1968199307,8cyclictest0-21swapper/33
1968199306,9cyclictest0-21swapper/33
1968199306,8cyclictest4408-21apt-get3
1968199306,15cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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