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2023-06-02 - 00:33

x86 Intel Atom x6425E @2000 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #e, 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 rackeslot3 (updated Thu Jun 01, 2023 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
684574996841,25cyclictest805751-21kworker/2:211:05:382
684574996835,32cyclictest696673-21kworker/2:008:05:182
684574996762,3cyclictest0-21swapper/208:03:092
684574996633,24cyclictest735595-21kworker/2:209:34:592
684574996537,25cyclictest696673-21kworker/2:007:50:262
684574996535,28cyclictest696673-21kworker/2:009:05:242
684574996359,2cyclictest0-21swapper/212:11:222
684574996354,5cyclictest728673-21fschecks_time09:15:192
684574996343,18cyclictest696673-21kworker/2:007:55:302
684574996342,19cyclictest763179-21kworker/2:010:20:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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