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2022-01-23 - 10:42

(undisclosed), Linux 4.9.20-rt16 (Profile)

Latency plot of system in rack #7, slot #1
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
Characteristics of the 10 highest latencies:
System rack7slot1.osadl.org (updated Sun Jan 23, 2022 00:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2427211954,23sleep20-21swapper/219:06:122
2485211753,23sleep10-21swapper/119:06:511
2433211351,56sleep30-21swapper/319:06:173
2543211253,54sleep00-21swapper/019:07:300
2865995915,24cyclictest0-21swapper/122:25:431
2865995516,13cyclictest0-21swapper/123:59:451
2865995310,40cyclictest0-21swapper/121:30:151
2865995216,33cyclictest0-21swapper/122:33:001
2865995114,13cyclictest0-21swapper/100:25:281
2865995113,12cyclictest0-21swapper/122:51:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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