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2023-02-07 - 18:48

x86 Intel Core i5-8265UE @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, slot #8
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 rackaslot8.osadl.org (updated Tue Feb 07, 2023 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224322292260,21sleep20-21swapper/207:06:262
224432282250,21sleep10-21swapper/107:06:341
224422263233,19sleep00-21swapper/007:06:330
224502246213,21sleep30-21swapper/307:06:393
74772650,0sleep20-21swapper/209:51:052
44072630,0sleep20-21swapper/209:50:012
169322620,0sleep10-21swapper/111:00:161
10152600,0sleep10-21swapper/109:47:161
149522590,0sleep20-21swapper/209:10:282
310822580,0sleep00-21swapper/010:06:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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