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2023-02-07 - 20:07

x86 Intel Core i9-9900K @3600 MHz, 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 Tue Feb 07, 2023 12:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17794392429422,5sleep00-21swapper/007:09:140
17784382366354,8sleep130-21swapper/1307:05:265
17794652358351,5sleep50-21swapper/507:09:3511
17794282358352,4sleep90-21swapper/907:09:0715
17792202349309,12sleep80-21swapper/807:06:5714
17791122347340,4sleep40-21swapper/407:05:3310
17792372346305,14sleep20-21swapper/207:07:078
17794462342334,5sleep70-21swapper/707:09:2113
17791852337317,14sleep30-21swapper/307:06:369
17792272336316,14sleep120-21swapper/1207:07:014
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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