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2023-02-08 - 05:45

x86 Intel Core i7-3770 @3400 MHz, Linux 3.18.69-rt75 (Profile)

Latency plot of system in rack #8, slot #5
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 rack8slot5.osadl.org (updated Wed Feb 08, 2023 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
956327857,8sleep40-21swapper/413:37:094
956427756,8sleep50-21swapper/513:37:105
953827756,8sleep60-21swapper/613:36:476
956127050,7sleep20-21swapper/213:37:072
983126534,7sleep70-21swapper/713:40:567
954425635,18sleep30-21swapper/313:36:523
968425424,16sleep10-21swapper/113:38:501
963525232,7sleep00-21swapper/013:38:090
999499183,7cyclictest0-21swapper/714:00:417
999499182,1cyclictest0-21swapper/716:38:237
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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