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2023-05-31 - 13:17

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 Wed May 31, 2023 12:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6675972381360,14sleep20-21swapper/207:07:148
6677872360322,12sleep90-21swapper/907:09:3015
6675912356349,5sleep140-21swapper/1407:07:116
6674972355348,4sleep120-21swapper/1207:05:494
6653132353346,5sleep110-21swapper/1107:05:163
6677342349329,14sleep00-21swapper/007:08:500
6677862347328,13sleep80-21swapper/807:09:3014
6675242341320,14sleep40-21swapper/407:06:1310
6677742340319,14sleep130-21swapper/1307:09:195
6675492340320,14sleep100-21swapper/1007:06:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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