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2025-06-28 - 22:55
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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 rack0slot2.osadl.org (updated Sat Jun 28, 2025 12:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209889999370,35cyclictest2380695-21latency_hist17:48:217
2098882993634,2cyclictest2526697-21kworker/u16:1+events_unbound20:23:545
2098882993432,2cyclictest2142958-21kworker/u16:0+events_unbound16:43:515
2098882993330,2cyclictest2021296-21kworker/u16:2+flush-8:015:33:425
2098882993128,2cyclictest2142958-21kworker/u16:0+events_unbound16:03:515
2098882993028,2cyclictest2699844-21kworker/u16:2+events_unbound20:47:545
2098882993028,2cyclictest2331104-21kworker/u16:1+events_unbound17:35:555
2098882993028,2cyclictest2085688-21kworker/u16:1+events_unbound15:51:325
2098882993028,2cyclictest2085688-21kworker/u16:1+events_unbound15:51:325
2098882992927,2cyclictest2607304-21kworker/u16:4+events_unbound19:47:315
2098882992927,2cyclictest2607304-21kworker/u16:4+events_unbound19:47:315
2098882992927,2cyclictest2526697-21kworker/u16:1+events_unbound19:39:425
2098882992927,2cyclictest2377691-21kworker/u16:2+events_unbound18:38:005
2098882992927,2cyclictest2267506-21kworker/u16:1+events_unbound17:16:315
2098882992926,2cyclictest2174933-21kworker/u16:2+flush-8:016:08:325
209889999280,26cyclictest2287980-21latency_hist17:03:227
2098893992825,2cyclictest2184145-21kworker/u16:4+events_unbound16:53:396
2098882992826,2cyclictest2586599-21kworker/u16:3+events_unbound20:51:475
2098882992826,2cyclictest2331104-21kworker/u16:1+events_unbound17:29:365
2098882992826,2cyclictest2184145-21kworker/u16:4+events_unbound16:54:305
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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