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2026-08-14 - 12:45
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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 Fri Aug 14, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
47390899105105,0cyclictest562969-21meminfo21:50:224
47390699104103,1cyclictest0-21swapper/221:25:202
47390899813,59cyclictest652607-21taskset00:31:164
473908998043,18cyclictest601ktimers/421:41:594
473908997675,1cyclictest536751-21taskset21:02:564
473908997557,18cyclictest0-21swapper/423:40:144
473908997538,18cyclictest61-21ksoftirqd/423:23:594
473908997153,18cyclictest873-21mta-sts-daemon22:10:154
473908997113,39cyclictest870-21mta-sts-daemon22:42:574
473908997012,39cyclictest538430-21sed21:05:214
473908996950,19cyclictest601ktimers/420:05:184
473908996729,19cyclictest476420-21chrt19:13:484
47390899624,39cyclictest481878-21taskset19:23:344
47390899612,59cyclictest629086-21tune2fs23:50:134
473908996022,19cyclictest874-21mta-sts-daemon22:50:334
473908996022,19cyclictest516775-21ntpq20:25:204
47390899580,39cyclictest643715-21ld00:15:224
47390899580,38cyclictest490169-21latency_hist19:40:024
473908995739,18cyclictest61-21ksoftirqd/419:52:334
473908995739,18cyclictest61-21ksoftirqd/419:39:004
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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