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2025-11-21 - 11:14
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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 20 highest latencies:
System rack5slot2.osadl.org (updated Fri Nov 21, 2025 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
311522198182,11sleep10-21swapper/119:09:331
289662186170,11sleep30-21swapper/319:05:043
309572182164,13sleep00-21swapper/019:06:590
289652173154,14sleep20-21swapper/219:05:032
102742440,0sleep30-21swapper/300:32:163
212622430,0sleep20-21swapper/223:32:352
48052420,0sleep20-21swapper/219:20:002
3137299113,4cyclictest7718-21munin-run22:05:020
313729993,3cyclictest16897-21munin-run20:49:590
13534290,0sleep10-21swapper/121:19:181
313729982,3cyclictest22952-21apt-get22:45:010
313729962,4cyclictest11961-21sendmail-msp20:40:000
313729960,3cyclictest6993-21munin-run00:15:010
313869955,0cyclictest2055-21kworker/3:000:20:163
313869953,1cyclictest22849-21/usr/sbin/munin23:50:183
313869950,5cyclictest0-21swapper/322:29:553
313839954,1cyclictest23433-21ssh00:22:442
313839950,5cyclictest0-21swapper/222:19:132
313839950,5cyclictest0-21swapper/200:34:052
313839950,4cyclictest32722-21ssh21:45:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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