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2024-05-21 - 17:51
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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 10 highest latencies:
System rack0slot8.osadl.org (updated Tue May 21, 2024 12:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2753832992450,122cyclictest0-21swapper/210:05:168
2753829992032,78cyclictest2882638-21kworker/u64:1+i915@
__i915_gem_free_work
17:42:000
275383699142139,2cyclictest841rcuc/608:00:3612
275383199138134,3cyclictest1277011-21IPDL00:50:381
275383299134132,1cyclictest411irq_work/208:00:368
2753838991270,2cyclictest0-21swapper/810:05:1514
2753833991270,1cyclictest1278060-21thunderbird09:25:049
2753845991260,1cyclictest0-21swapper/1509:25:057
2753839991260,1cyclictest0-21swapper/909:25:0415
2753834991261,1cyclictest1277056-21Renderer07:50:1210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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