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2025-07-17 - 14:24
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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 Thu Jul 17, 2025 12:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2086710994330,425cyclictest0-21swapper/008:36:000
208671099432425,6cyclictest2167480-21kworker/u64:1+events_unbound09:04:490
208671099428421,6cyclictest2384492-21kworker/u64:3+events_unbound12:21:350
208671699427424,2cyclictest2208182-21kworker/u64:0+events_unbound11:52:2612
208671099427423,4cyclictest1775635-21MediaPD~er0
208671099427423,3cyclictest0-21swapper/012:35:380
208671099427423,3cyclictest0-21swapper/010:12:320
208671099426422,3cyclictest0-21swapper/008:29:210
208671099425421,4cyclictest0-21swapper/012:26:320
208671699424423,1cyclictest2253605-21kworker/u64:5+events_unbound10:12:3112
208671699423420,2cyclictest2179082-21kworker/u64:0+events_unbound08:51:5112
208671299422422,0cyclictest0-21swapper/212:35:378
208671699419416,2cyclictest2290359-21kworker/u64:6+events_unbound10:37:5912
208671499415412,2cyclictest1782120-21kworker/u64:0+events_unbound08:31:5310
208671499413413,0cyclictest0-21swapper/412:35:3810
208671399390387,2cyclictest2157256-21kworker/u64:2+events_unbound08:26:019
208672199383379,3cyclictest2239269-21kworker/u64:2+events_unbound10:31:452
2086726993760,375cyclictest0-21swapper/1512:02:307
208672499376374,1cyclictest7347-21Xorg08:29:515
208672199374371,2cyclictest2085459-21WebrtcW~r2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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