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2026-04-28 - 22:59
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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 28, 2026 12:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41077959911214,0cyclictest0-21swapper/707:35:177
4107795999235,38cyclictest25705-21timerwakeupswit10:30:237
4107795999111,40cyclictest4124535-21/usr/sbin/munin07:40:137
4107795997214,19cyclictest0-21swapper/708:23:157
4107795997112,20cyclictest49052-21sh11:15:157
4107795996829,19cyclictest30750irq/60-ahci[0000:00:07.0]11:40:157
4107795996810,39cyclictest9132-21python310:00:237
410779599678,40cyclictest4128475-21ntpq07:45:197
4107795996728,39cyclictest4149352-21/usr/sbin/munin08:25:237
410779599669,38cyclictest236199-21snmpd11:06:557
4107795996526,38cyclictest1-21systemd11:40:017
4107795996325,19cyclictest4172451-21grep09:05:217
4107795996323,19cyclictest0-21swapper/710:09:377
4107795996223,39cyclictest0-21swapper/711:22:357
4107795996223,39cyclictest0-21swapper/711:22:357
4107795996122,19cyclictest101550irq/39-eno2-TxRx-011:50:157
410779599602,39cyclictest4181996-21cat09:25:017
4107795995719,38cyclictest0-21swapper/709:03:557
4107795995718,39cyclictest4158827-21ntp_states08:40:197
4107795995718,19cyclictest0-21swapper/709:30:317
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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