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2022-01-23 - 09:51

Intel(R) Core(TM) i5-8365UE CPU @ 1.60GHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, slot #8
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 10 highest latencies:
System rackaslot8.osadl.org (updated Sun Jan 23, 2022 00:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
281282296265,21sleep10-21swapper/119:09:521
279802291261,19sleep20-21swapper/219:08:042
281322283257,16sleep00-21swapper/019:09:550
281372273210,21sleep30-21swapper/319:09:583
57682610,3sleep012-21ksoftirqd/022:20:180
130052600,0sleep10-21swapper/100:20:351
168142580,0sleep20-21swapper/223:45:012
38112570,0sleep10-21swapper/122:38:411
265962560,0sleep10-21swapper/123:50:241
73962530,0sleep012-21ksoftirqd/023:00:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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