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2022-07-01 - 00:20

x86 Intel Core i7-X990 @3467 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #c, 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 rackcslot1.osadl.org (updated Thu Jun 30, 2022 12:49:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3954991000,94rtkit-daemon0-21swapper/907:09:0211
3954991000,94rtkit-daemon0-21swapper/907:09:0211
2172027867,7sleep20-21swapper/207:06:424
2172027867,7sleep20-21swapper/207:06:424
2177527766,7sleep40-21swapper/407:07:326
2177527766,7sleep40-21swapper/407:07:326
309062750,1sleep100-21swapper/1011:30:112
2177827159,8sleep50-21swapper/507:07:337
2177827159,8sleep50-21swapper/507:07:337
2176127046,7sleep30-21swapper/307:07:195
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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