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2023-02-07 - 19:55

x86 Intel Core i5-750 @2667 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #8, 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
Characteristics of the 10 highest latencies:
System rack8slot3.osadl.org (updated Tue Feb 07, 2023 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9726214436,103sleep30-21swapper/307:07:523
3221021150,1sleep00-21swapper/008:00:350
285332850,1sleep22894-21lldpd07:55:002
958526449,12sleep10-21swapper/107:06:171
961526351,10sleep20-21swapper/207:06:382
991024638,5sleep00-21swapper/007:09:580
1011299373,33cyclictest0-21swapper/110:56:261
130312360,6sleep30-21swapper/308:35:173
1011299356,28cyclictest0-21swapper/112:19:011
1011299354,30cyclictest0-21swapper/111:15:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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