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2026-08-27 - 07:50
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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 rackfslot7.osadl.org (updated Thu Aug 27, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2240409997739,38cyclictest2397197-21systemd-run23:54:594
2240409997616,59cyclictest2289330-21ps20:35:224
2240409997234,38cyclictest2265816-21kworker/u32:4+flush-8:020:45:264
2240409997214,39cyclictest2371399-21sed23:05:194
2240409997113,58cyclictest2318135-21munin-run21:30:024
2240409997012,39cyclictest2278684-21taskset20:15:344
2240409997012,39cyclictest2278684-21taskset20:15:344
224040999689,58cyclictest0-21swapper/423:35:214
224040999678,59cyclictest2261107-21latency19:45:194
2240409996526,39cyclictest2257176-21aten2.4-expect19:40:124
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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