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2026-05-11 - 00:12
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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 Sun May 10, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2316421290,2sleep1291rcuc/111:05:521
6112991135,32cyclictest6118-21latency_hist07:01:310
6112991135,32cyclictest6118-21latency_hist07:01:310
6112991083,33cyclictest32287-21/usr/sbin/munin10:26:540
6112991083,29cyclictest352-21runrttasks11:01:370
61129910655,45cyclictest27291-21ntp_offset11:11:540
6112991065,25cyclictest21643-21kernelversion11:56:510
61129910651,49cyclictest20274-21timerandwakeup09:12:040
61129910651,49cyclictest20274-21timerandwakeup09:12:040
61129910633,8cyclictest0-21swapper/009:01:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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