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2026-04-21 - 13:09
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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 Apr 21, 2026 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125708699560,16cyclictest0-21swapper/223:27:222
1257081995417,18cyclictest874-21mta-sts-daemon22:40:161
1257081995214,19cyclictest0-21swapper/123:50:161
1257108995132,19cyclictest1419870-21awk00:05:117
1257096995112,20cyclictest0-21swapper/419:45:154
1257081995113,19cyclictest0-21swapper/123:35:151
1257096995012,19cyclictest0-21swapper/421:45:174
1257081995032,18cyclictest34-21ksoftirqd/123:15:151
1257076995012,19cyclictest0-21swapper/023:35:150
1257086994910,39cyclictest0-21swapper/223:45:152
1257108994729,1cyclictest0-21swapper/721:15:157
125708199477,39cyclictest0-21swapper/121:55:161
1257076994728,19cyclictest0-21swapper/021:05:160
1257076994728,19cyclictest0-21swapper/021:05:150
125708199457,38cyclictest0-21swapper/120:30:191
125708199456,39cyclictest0-21swapper/119:30:161
125707699457,19cyclictest0-21swapper/023:00:160
125710399435,19cyclictest0-21swapper/520:05:175
125708199435,19cyclictest0-21swapper/120:45:151
125709699424,19cyclictest0-21swapper/420:35:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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