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2025-11-02 - 21:14
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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 Sun Nov 02, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
252652262183,24sleep30-21swapper/33
2558399259256,2cyclictest0-21swapper/33
252792256188,48sleep00-21swapper/00
252752254186,26sleep10-21swapper/11
253992249212,24sleep20-21swapper/22
1579121660,2sleep12557199cyclictest1
2557199151147,2cyclictest0-21swapper/11
2556899132127,3cyclictest31525-21strings0
2557999108105,2cyclictest0-21swapper/22
300862560,1sleep230089-21tr2
2557999262,19cyclictest12580-21apt-get2
2557999251,20cyclictest16411-21munin-run2
2557999245,17cyclictest0-21swapper/22
2557999244,18cyclictest30328-21cat2
2557999241,4cyclictest18448-21sendmail2
2557999241,20cyclictest5084-21idleruntime-cro2
2557999238,13cyclictest6473-21kworker/u8:02
25579992316,4cyclictest14838-21munin-run2
2557999231,3cyclictest29383-21munin-run2
25571992315,4cyclictest31434-21readlink1
25571992312,6cyclictest10333-21gdbus1
2557999225,15cyclictest10807-21awk2
2557999223,17cyclictest15394-21cat2
25579992215,4cyclictest4761-21sh2
2557999221,4cyclictest29484-21munin-run2
2557999221,3cyclictest602-21munin-run2
2557999221,18cyclictest22567-21cat2
2557999221,18cyclictest20472-21perf2
25571992215,4cyclictest22507-21sendmail1
25571992213,6cyclictest505-21dbus-daemon1
2556899222,17cyclictest23031-21cut0
2556899220,19cyclictest29136-21seq0
114882220,2sleep20-21swapper/22
25583992116,3cyclictest26108-21diskstats3
2557999213,16cyclictest25594-21cat2
25579992117,2cyclictest798-21cut2
25579992116,3cyclictest3374-21ntp_offset2
25579992116,3cyclictest1011-21munin-run2
25579992115,3cyclictest23416-21basename2
25579992115,3cyclictest13835-21ntp_offset2
25579992114,5cyclictest18923-21cron2
2557999211,18cyclictest4817-21cat2
2557999211,18cyclictest22947-1kworker/2:0H2
2557999211,18cyclictest22355-1kworker/2:1H2
2557999211,17cyclictest22947-1kworker/2:0H2
2557199218,10cyclictest1536-21cups-browsed1
2557199213,10cyclictest26714-21lldpd1
25571992115,4cyclictest8831-21sed1
25571992115,3cyclictest27369-21grep1
25568992116,3cyclictest4587-21aten2_r9power_e0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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