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2026-05-12 - 02:27
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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 Mon May 11, 2026 12:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29921719911112,79cyclictest0-21swapper/209:40:142
2992173998363,19cyclictest3162495-21threads12:15:224
2992174998225,38cyclictest2997310-21kworker/5:007:27:455
2992173998138,40cyclictest3104867-21switchtime10:30:234
2992173997777,0cyclictest3044694-21munin-run08:45:014
2992173997618,39cyclictest3040722-21ld08:35:194
2992171997537,19cyclictest876-21mta-sts-daemon07:15:162
2992173997416,39cyclictest3150116-21telnet11:55:124
2992173997214,39cyclictest3083999-21cut09:55:134
2992174997133,38cyclictest70-21ksoftirqd/511:05:175
299217399708,40cyclictest3110190-21rt-features10:40:214
2992169996931,19cyclictest875-21mta-sts-daemon09:35:150
299217399676,41cyclictest3089057-21taskset10:02:564
2992173996729,19cyclictest3019944-21munin-run08:00:024
2992173996627,38cyclictest874-21mta-sts-daemon09:50:164
2992174996527,38cyclictest3105324-21kworker/5:1+events_power_efficient12:16:065
299217399657,19cyclictest0-21swapper/410:39:464
2992173996426,19cyclictest0-21swapper/408:55:244
2992173996425,19cyclictest6050ktimers/409:09:394
299217399624,19cyclictest0-21swapper/411:02:324
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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