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2023-12-11 - 22:19
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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 rack1slot3.osadl.org (updated Tue Oct 10, 2023 10:56:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121398540,15rtkit-daemon400614-21irqstats07:25:291
4539852470,7chrt453988-21unixbench_singl09:45:432
121398470,21rtkit-daemon1-21systemd10:19:541
393979994435,3cyclictest0-21swapper/309:15:013
393979994334,3cyclictest0-21swapper/310:31:323
121398430,8rtkit-daemon1-21systemd09:49:311
121398430,4rtkit-daemon0-21swapper/107:20:301
121398430,16rtkit-daemon404640-21ps07:35:331
39397999423,34cyclictest452525-21turbostat09:49:563
39397999422,35cyclictest425858-21turbostat08:39:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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