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2022-12-08 - 16:56

x86 Intel Celeron N3350 @1100 MHz, Linux 5.10.90-rt60 (Profile)

Latency plot of system in rack #c, slot #4
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 rackcslot4.osadl.org (updated Wed Dec 07, 2022 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
312036024750,8sleep10-21swapper/107:05:181
31217722246173,58sleep00-21swapper/007:08:500
159199860,6rtkit-daemon1590-21rtkit-daemon10:20:170
32448952770,1chrt3244898-21proc_pri11:10:351
32046412700,8chrt3204639-21ssh10:05:180
159199700,5rtkit-daemon1590-21rtkit-daemon11:57:000
31838462680,5sleep013-21ksoftirqd/009:30:280
159199670,3rtkit-daemon0-21swapper/007:22:371
159199660,3rtkit-daemon0-21swapper/008:13:001
159199630,3rtkit-daemon0-21swapper/010:12:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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