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2022-01-23 - 10:55

Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz, 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 Sun Jan 23, 2022 00:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
262782221105,111sleep30-21swapper/319:08:433
255472185161,12sleep20-21swapper/219:05:282
261242178159,15sleep10-21swapper/119:06:571
262332174105,65sleep00-21swapper/019:08:070
135792870,5sleep30-21swapper/322:25:293
229952840,2sleep10-21swapper/123:50:461
212872830,1sleep20-21swapper/221:57:492
81362430,2sleep10-21swapper/100:10:571
2663699302,27cyclictest0-21swapper/223:19:132
2663699302,27cyclictest0-21swapper/221:25:242
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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