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2023-02-06 - 06:30

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, slot #8
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 -Up99 -i200 -h400 -q done
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 rack0slot8.osadl.org (updated Mon Feb 06, 2023 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
642372994250,0cyclictest0-21swapper/320:51:469
64239099421419,1cyclictest0-21swapper/1421:04:046
64238099418417,1cyclictest0-21swapper/820:38:3014
64238099418417,1cyclictest0-21swapper/820:38:3014
64238099418417,1cyclictest0-21swapper/820:34:4014
64238099418417,1cyclictest0-21swapper/820:34:4014
64238099418417,1cyclictest0-21swapper/820:14:5914
64238099417416,1cyclictest0-21swapper/820:51:0114
64238099417416,1cyclictest0-21swapper/820:48:1314
64238099417416,1cyclictest0-21swapper/820:18:1914
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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