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2025-06-19 - 00:05
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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 rack9slot2.osadl.org (updated Wed Jun 18, 2025 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
198052296272,14sleep30-21swapper/33
188422290178,70sleep20-21swapper/22
203372269180,50sleep00-21swapper/00
2078199241237,2cyclictest0-21swapper/22
203942231193,26sleep10-21swapper/11
2077399205200,3cyclictest24638-21cut0
2077799197191,4cyclictest24633-21apt-config1
2078699183180,2cyclictest0-21swapper/33
1949221370,1sleep20-21swapper/22
1949221370,1sleep20-21swapper/22
27932470,1sleep22797-21needreboot2
38712430,1sleep20-21swapper/22
2077399320,30cyclictest5357-21kworker/0:20
40922270,9sleep09-21ksoftirqd/00
20781992617,5cyclictest27583-21tr2
61292250,11sleep335-21ksoftirqd/33
2078199240,15cyclictest111rcu_preempt2
138782240,2sleep00-21swapper/00
20786992312,6cyclictest25009-21packagekitd3
2078199234,17cyclictest9910-21cat2
2078199233,17cyclictest17075-21latency_hist2
20781992316,5cyclictest22760-21df2
20781992316,5cyclictest20429-21sh2
20781992315,5cyclictest25380-21awk2
2078199231,4cyclictest29806-21munin-run2
2078199231,4cyclictest2497-21munin-run2
20777992313,6cyclictest11245-21apt-get1
20773992317,4cyclictest31791-21sed0
20773992316,4cyclictest505-21dbus-daemon0
2078199224,16cyclictest28932-21cat2
20781992218,3cyclictest31589-21systemd2
20781992217,3cyclictest9445-21munin-run2
2078199221,3cyclictest18002-21munin-run2
20781992211,5cyclictest20686-21apt-get2
2077799223,16cyclictest26812-21cron1
20777992215,4cyclictest7817-21sh1
26312210,2sleep00-21swapper/00
20786992116,3cyclictest7892-21cpuspeed_turbos3
20786992116,3cyclictest31821-21latency3
20786992115,4cyclictest4168-21switchtime3
20786992114,4cyclictest27139-21memory3
2078199218,11cyclictest28-21ksoftirqd/22
2078199217,12cyclictest2082-21systemd-journal2
2078199212,17cyclictest5923-21cat2
20781992115,4cyclictest10333-21gdbus2
20781992114,5cyclictest18277-21diskstats2
2078199211,3cyclictest0-21swapper/22
2078199211,3cyclictest0-21swapper/22
2078199211,18cyclictest16058-21munin-run2
2078199211,17cyclictest25030-1kworker/2:2H2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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