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2026-05-20 - 17:03
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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 Wed May 20, 2026 12:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1181870997739,19cyclictest1343879-21needreboot12:00:191
1181870997153,18cyclictest781-21mta-sts-daemon08:04:311
1181870997133,19cyclictest1272058-21processes09:50:211
1181870997011,40cyclictest1291272-21ntpq10:25:191
1181870996930,19cyclictest0-21swapper/111:15:151
1181870996425,39cyclictest0-21swapper/107:57:031
118187099624,39cyclictest1261041-21ntpq09:30:211
1181870995839,19cyclictest331ktimers/108:09:551
1181870995819,19cyclictest877-21mta-sts-daemon12:34:261
1181873995719,38cyclictest601ktimers/407:55:174
118187599560,16cyclictest0-21swapper/607:35:156
1181870995637,19cyclictest1191542-21/usr/sbin/munin07:25:171
1181870995536,19cyclictest1363778-21sed12:35:231
1181870995517,19cyclictest1295334-21munin-run10:35:011
118187099550,15cyclictest0-21swapper/112:25:001
1181870995419,35cyclictest0-21swapper/109:39:111
1181870995419,15cyclictest0-21swapper/112:18:311
1181870995419,15cyclictest0-21swapper/112:18:311
1181873995335,0cyclictest0-21swapper/412:20:144
1181873995314,38cyclictest0-21swapper/407:45:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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