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2026-08-06 - 17:04
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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 rackfslot7.osadl.org (updated Thu Aug 06, 2026 12:46:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2769379997921,39cyclictest511ktimers/310:37:143
2769379997821,38cyclictest511ktimers/309:30:413
2769379997032,19cyclictest2941945-21/usr/sbin/munin12:20:153
2769379997032,19cyclictest2839012-21sh09:15:103
2769379996931,38cyclictest2820754-21timerandwakeup08:40:223
2769379996910,39cyclictest2812222-21ntpq08:25:193
2769379996810,39cyclictest2944488-21/usr/sbin/munin12:25:153
276937999657,39cyclictest236199-21snmpd07:45:573
2769379996324,38cyclictest871-21mta-sts-daemon10:59:493
2769379995919,39cyclictest2887959-21taskset10:40:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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