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2022-01-23 - 11:10

Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz, Linux 5.15.2-rt19 (Profile)

Latency plot of system in rack #0, slot #3
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rack0slot3.osadl.org (updated Sun Jan 23, 2022 00:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2921842477395,31sleep30-21swapper/39
2919892428344,36sleep130-21swapper/135
2921752416336,31sleep140-21swapper/146
2919662413331,35sleep80-21swapper/814
2922362410326,74sleep110-21swapper/113
2921262407324,31sleep10-21swapper/11
2920422392347,35sleep60-21swapper/612
2920412390345,35sleep50-21swapper/511
2920052388343,35sleep90-21swapper/915
2922442387332,28sleep20-21swapper/28
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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