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2025-09-10 - 08:18
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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 Sep 10, 2025 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1745760999434,39cyclictest1788180-21taskset20:22:567
1745760997436,19cyclictest1424-21sendmail-mta23:36:247
1745760997031,19cyclictest0-21swapper/722:49:527
1745760997031,19cyclictest0-21swapper/700:05:517
1745760996930,39cyclictest0-21swapper/722:40:327
1745760996930,20cyclictest0-21swapper/700:39:287
1745760996930,19cyclictest0-21swapper/721:04:167
1745760996929,39cyclictest0-21swapper/719:47:207
1745760996829,19cyclictest0-21swapper/720:46:527
1745760996729,38cyclictest0-21swapper/721:39:407
174576099590,20cyclictest0-21swapper/722:53:387
1745760995817,19cyclictest1901993-21munin-run23:45:027
1745760995719,20cyclictest0-21swapper/719:12:387
1745760995719,18cyclictest0-21swapper/722:34:427
1745760995718,39cyclictest0-21swapper/722:39:017
1745760995718,39cyclictest0-21swapper/719:31:257
1745760995718,20cyclictest0-21swapper/720:58:187
1745760995718,20cyclictest0-21swapper/720:58:187
1745760995718,0cyclictest1903563-21ntpq23:45:227
1745760995618,19cyclictest101750irq/39-eno2-TxRx-021:22:007
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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