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2025-12-24 - 00:10
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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 23, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211522252178,17sleep20-21swapper/22
211212252179,25sleep10-21swapper/11
210952252180,24sleep00-21swapper/00
210282244170,62sleep30-21swapper/33
1340121710,2sleep32140399cyclictest3
3276321490,3sleep12139699cyclictest1
271032620,1sleep00-21swapper/00
114532580,3sleep22140199cyclictest2
159032560,3sleep3341rcuc/33
123012510,2sleep30-21swapper/33
270332500,2sleep30-21swapper/33
21392994614,17cyclictest14219-21seq0
2139299419,18cyclictest29672-21seq0
2139299416,19cyclictest25173-21unixbench_singl0
140392410,2sleep30-21swapper/33
242112390,1sleep30-21swapper/33
2139299360,3cyclictest8472-21sendmail-mta0
2139299351,3cyclictest24560-21sendmail-mta0
2139299341,4cyclictest17091-21/usr/sbin/munin0
2139299341,3cyclictest18372-21sendmail-mta0
2140199333,9cyclictest8142-21wc2
2140199331,30cyclictest23038-21kworker/2:22
2139299331,29cyclictest4721-21grep0
2139299329,20cyclictest1731-21sendmail-mta0
2139299328,21cyclictest4087-21sendmail-mta0
2139299325,24cyclictest27063-21tr0
2139299320,8cyclictest520-21rs:main0
2139299320,4cyclictest340-21systemd-journal0
21403993114,3cyclictest35-21ksoftirqd/33
21392993115,14cyclictest25379-21cat0
21392993115,13cyclictest11337-21grep0
2139299311,4cyclictest340-21systemd-journal0
21392993114,15cyclictest20131-21cat0
21392993114,15cyclictest20131-21cat0
21392993114,14cyclictest15910-21cron0
2139299311,26cyclictest2392-21grep0
2139299310,2cyclictest571-21gdbus0
2139299310,2cyclictest0-21swapper/00
2140399307,2cyclictest111rcu_preempt3
21403993012,16cyclictest35-21ksoftirqd/33
2140199305,10cyclictest2481-21cron2
2140199303,6cyclictest20642-21chrt2
2139299302,23cyclictest3949-21apt-get0
2139299302,23cyclictest27035-21apt-get0
21392993014,14cyclictest20982-21cut0
21392993014,14cyclictest20982-21cut0
2139299300,4cyclictest634-21snmpd0
2139299300,4cyclictest29808-21/usr/sbin/munin0
2139299300,3cyclictest12564-21sendmail-mta0
2140399294,10cyclictest35-21ksoftirqd/33
21403992910,4cyclictest35-21ksoftirqd/33
2140399290,7cyclictest35-21ksoftirqd/33
2140199296,9cyclictest19734-21cstates2
2140199296,9cyclictest19734-21cstates2
2140199295,10cyclictest23224-21cut2
2140199294,10cyclictest5032-21sed2
2140199294,10cyclictest25234-21grep2
2140199293,9cyclictest32224-21apt-config2
2140199292,11cyclictest28-21ksoftirqd/22
2139299299,18cyclictest31577-21gltestperf0
2139299299,17cyclictest9911-21sendmail-mta0
2139299298,19cyclictest571-21gdbus0
2139299297,20cyclictest25713-21cups-browsed0
2139299292,22cyclictest10678-21apt-get0
2139299291,4cyclictest571-21gdbus0
21392992914,13cyclictest30472-21cat0
21392992914,13cyclictest16212-21aten2.4-expect0
21392992913,14cyclictest3201-21which0
2139299290,4cyclictest23224-21sendmail-mta0
2139299290,3cyclictest25210-21ntpq0
2139299290,2cyclictest23433-21cat0
2139299290,2cyclictest12999-21cstates0
2140399288,11cyclictest111rcu_preempt3
2140399284,6cyclictest35-21ksoftirqd/33
21403992810,10cyclictest35-21ksoftirqd/33
21401992813,6cyclictest28-21ksoftirqd/22
2140199281,15cyclictest3807-21chrt2
2139299288,18cyclictest10421-21basename0
2139299288,17cyclictest6193-21cpuspeed0
2139299288,17cyclictest19314-21cat0
2139299287,18cyclictest30088-21sendmail-mta0
2139299287,18cyclictest20461-21sendmail-mta0
2139299286,20cyclictest1658-21head0
2139299285,20cyclictest6696-21date0
2139299283,20cyclictest21749-21apt-get0
2139299282,21cyclictest28334-21apt-get0
21392992814,12cyclictest24982-21aten2_r9power_c0
21392992810,15cyclictest4401-21sendmail-mta0
21392992810,15cyclictest26871-21cat0
2139299280,3cyclictest27919-21irqstats0
2139299280,3cyclictest11756-21taskset0
2140399279,10cyclictest35-21ksoftirqd/33
2140399277,9cyclictest35-21ksoftirqd/33
2140199274,6cyclictest27823-21chrt2
2140199273,9cyclictest14472-21cstates2
2140199272,9cyclictest26570-21cpuspeed_turbos2
2140199270,7cyclictest28-21ksoftirqd/22
2140199270,10cyclictest31905-21chrt2
2140199270,10cyclictest14409-21chrt2
2139299279,16cyclictest340-21systemd-journal0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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