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2022-05-26 - 00:04

x86 Intel Celeron G1620 @2700 MHz, Linux 5.4.17-rt9 (Profile)

Latency plot of system in rack #9, slot #5
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 20 highest latencies:
System rack9slot5.osadl.org (updated Fri May 20, 2022 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
45512420,0sleep10-21swapper/121:08:111
76472390,1sleep00-21swapper/021:09:590
301812390,0sleep00-21swapper/021:26:010
264599290,2rtkit-daemon2644-21rtkit-daemon18:38:041
65932227,11sleep00-21swapper/018:38:180
253122190,0sleep10-21swapper/123:41:061
723099160,15cyclictest18268-21x2golistsession23:13:391
723099150,2cyclictest6142-21x2golistsession23:27:491
723099150,1cyclictest15258-21tune2fs20:19:481
723099150,14cyclictest29538-21apt-get21:49:381
722999150,14cyclictest3556-21x2golistsession23:25:190
722999150,14cyclictest0-21swapper/020:42:280
286892150,1sleep028801-21diskmemload22:11:090
264599150,1rtkit-daemon2644-21rtkit-daemon22:18:251
264599150,1rtkit-daemon2644-21rtkit-daemon20:25:551
7230991412,1cyclictest0-21swapper/123:51:191
723099140,13cyclictest18221-21apt-get22:04:381
264599140,1rtkit-daemon2644-21rtkit-daemon22:56:100
264599140,1rtkit-daemon2644-21rtkit-daemon22:27:571
264599140,1rtkit-daemon2644-21rtkit-daemon19:59:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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