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2025-10-28 - 00:28
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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 rack1slot2.osadl.org (updated Mon Oct 27, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
427723929,0sleep20-21swapper/206:17:222
431823725,0sleep10-21swapper/106:17:491
434823627,0sleep30-21swapper/306:18:113
442623423,0sleep00-21swapper/006:19:040
8315070,0irq/26-0000:00:0-21swapper/306:46:463
329970,0watchdog/313008-21ssh09:16:303
329970,0watchdog/30-21swapper/308:56:393
29935070,0irq/33-eth0-tx-0-21swapper/006:58:430
29925070,0irq/32-eth0-rx-15305-21kthreadcore07:11:473
29925070,0irq/32-eth0-rx-0-21swapper/310:26:413
29925070,0irq/32-eth0-rx-0-21swapper/308:36:513
46989966,0cyclictest0-21swapper/209:19:102
46969965,0cyclictest0-21swapper/010:46:250
339960,0migration/32929-21sh09:07:233
339960,0migration/312092-21sh11:49:143
329960,0watchdog/328137-21iostat_ios08:46:473
329960,0watchdog/318167-21ssh11:15:503
329960,0watchdog/30-21swapper/311:39:023
329960,0watchdog/30-21swapper/311:25:263
329960,0watchdog/30-21swapper/311:18:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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