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2026-05-15 - 03:51
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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 10 highest latencies:
System rackbslot7.osadl.org (updated Fri May 15, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
141219913164,60cyclictest2374-21systemd-journal21:59:130
1376921186,15sleep00-21swapper/018:58:370
14121991105,29cyclictest28828-21chrt23:54:580
141219911011,32cyclictest352-21runrttasks22:53:330
14121991074,31cyclictest8400-21/usr/sbin/munin21:32:480
14121991073,41cyclictest15058-21apt-get20:42:140
14121991064,31cyclictest352-21runrttasks00:11:010
14121991063,30cyclictest13830-21latency21:41:360
14121991062,30cyclictest12966-21sendmail_mailtr00:21:430
14121991059,13cyclictest0-21swapper/023:41:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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