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2026-03-10 - 10:08
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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 rackbslot7.osadl.org (updated Tue Mar 10, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12743991234,49cyclictest32387-21ssh00:05:480
12743991144,30cyclictest10841-21fschecks_count22:35:540
127439911421,27cyclictest18361-21latency_hist21:55:360
127439911338,65cyclictest0-21swapper/019:10:580
127439911338,65cyclictest0-21swapper/019:10:580
12743991133,31cyclictest4175-21apt-config22:25:370
12743991133,31cyclictest4175-21apt-config22:25:370
127439911325,10cyclictest0-21swapper/023:15:570
12743991123,38cyclictest352-21runrttasks22:26:180
12743991123,38cyclictest352-21runrttasks22:26:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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