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2025-12-16 - 12:49
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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 rackfslot7.osadl.org (updated Tue Dec 16, 2025 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2301050991470,1cyclictest0-21swapper/221:45:132
2301050991470,1cyclictest0-21swapper/221:45:122
2301052991280,127cyclictest0-21swapper/419:10:204
230105599990,98cyclictest0-21swapper/719:10:207
230105599850,2cyclictest0-21swapper/719:25:187
2301051997758,19cyclictest2431291-21kworker/u32:3+events_unbound23:40:033
2301055997314,19cyclictest0-21swapper/722:25:157
2301054996949,19cyclictest781ktimers/620:15:136
2301054996628,18cyclictest0-21swapper/620:55:146
230105499657,39cyclictest2407359-21ntpq22:15:206
2301054996525,39cyclictest0-21swapper/621:29:316
2301054996525,39cyclictest0-21swapper/621:29:306
2301051996545,20cyclictest2436468-21/usr/sbin/munin23:10:013
2301054996426,19cyclictest2397858-21df22:00:156
2301054996426,19cyclictest2303743-21awk19:15:006
230105499635,39cyclictest2404795-21/usr/sbin/munin22:10:256
230105499624,39cyclictest2427062-21ntpq22:50:206
2301054995957,1cyclictest874-21mta-sts-daemon00:05:156
2301054995919,39cyclictest2453812-21sendmail23:40:006
230105499591,39cyclictest2421197-21meminfo22:40:186
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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