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2024-05-30 - 02:00
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 rack0slot8.osadl.org (updated Wed May 29, 2024 12:46:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27092959925764,66cyclictest2844716-21kworker/u64:4+i915@
__i915_gem_free_work
19:51:070
27093109921817,81cyclictest0-21swapper/1412:20:256
270931099156156,0cyclictest0-21swapper/1410:30:016
27092959915633,1cyclictest0-21swapper/010:15:040
27093099915329,1cyclictest0-21swapper/1310:15:045
270930299152149,1cyclictest941rcuc/710:03:3413
2709299991510,150cyclictest0-21swapper/412:10:5910
27093089913613,2cyclictest390664-21Isolated00:50:384
27092989913414,1cyclictest0-21swapper/312:20:259
2709310991320,1cyclictest0-21swapper/1411:35:036
2709310991320,1cyclictest0-21swapper/1411:35:036
2709295991310,0cyclictest0-21swapper/008:40:040
2709295991310,0cyclictest0-21swapper/008:40:040
2709305991280,0cyclictest1231irq_work/1011:35:032
2709305991280,0cyclictest1231irq_work/1011:35:032
2709298991270,1cyclictest0-21swapper/311:35:049
2709298991270,1cyclictest0-21swapper/311:35:039
2709308991260,1cyclictest0-21swapper/1211:35:034
2709308991260,1cyclictest0-21swapper/1211:35:034
2709299991260,1cyclictest0-21swapper/411:35:0310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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