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2022-12-02 - 20:10

x86 Intel Core i9-9900K @3600 MHz, Linux 5.15.2-rt19 (Profile)

Latency plot of system in rack #0, 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot3.osadl.org (updated Fri Dec 02, 2022 12:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36752432351311,13sleep100-21swapper/1007:10:002
36752272351310,13sleep140-21swapper/1407:09:476
36751152349330,13sleep40-21swapper/407:08:1710
36750102343324,12sleep80-21swapper/807:07:0114
36752382342321,15sleep70-21swapper/707:09:5713
36728642342321,14sleep00-21swapper/007:05:170
36751142340320,14sleep30-21swapper/307:08:169
36749122340319,14sleep130-21swapper/1307:05:465
36752312339301,12sleep10-21swapper/107:09:511
36752282338318,14sleep150-21swapper/1507:09:487
36749252338319,13sleep90-21swapper/907:05:5715
36749052336315,14sleep60-21swapper/607:05:3912
36750852335323,8sleep110-21swapper/1107:07:523
36719462335323,8sleep120-21swapper/1207:05:124
36749752332312,14sleep20-21swapper/207:06:388
36750982330311,13sleep50-21swapper/507:08:0211
3675464991024,21cyclictest0-21swapper/1311:59:485
367546499884,42cyclictest0-21swapper/1310:16:185
367546499841,20cyclictest0-21swapper/1309:13:225
367546299831,20cyclictest0-21swapper/1108:49:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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