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2026-08-14 - 07:01
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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 50 highest latencies:
System rack1slot2.osadl.org (updated Fri Aug 14, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
226626160,0sleep30-21swapper/319:28:223
218424940,0sleep20-21swapper/219:27:252
2788124535,0sleep10-21swapper/119:25:161
224723127,0sleep00-21swapper/019:28:110
339970,0migration/32451-21irqrtprio00:50:273
35160,0ktimersoftd/30-21swapper/322:50:303
339960,0migration/316015-21kthreadcore00:00:273
339960,0migration/312324-21sh22:41:463
29815060,0irq/29-eth0-tx-10012-21munin-node19:35:230
29805060,0irq/28-eth0-rx-32471-21head21:40:253
29805060,0irq/28-eth0-rx-26750-21fschecks_time23:30:233
29805060,0irq/28-eth0-rx-19054-21fschecks_count22:10:253
24879966,0cyclictest14001-21diskmemload22:45:512
24879960,0cyclictest0-21swapper/200:13:592
19160,0ktimersoftd/10-21swapper/122:50:211
149960,0migration/0777-21kthreadcore19:50:260
149960,0migration/030869-21munin-node20:30:310
149960,0migration/030547-21timerandwakeup23:10:360
149960,0migration/018951-21sh22:26:290
8305050,0irq/26-0000:00:0-21swapper/320:33:283
339950,0migration/39661-21taskset20:16:023
339950,0migration/37953-21munin-node20:40:253
339950,0migration/35933-21taskset22:57:463
339950,0migration/35782-21kthreadcore23:15:273
339950,0migration/34392-21kthreadcore23:35:283
339950,0migration/33305-21aten_r1power_en21:00:203
339950,0migration/3329-21runrttasks21:57:503
339950,0migration/332206-21fschecks_count19:50:223
339950,0migration/331372-21munin-run19:50:093
339950,0migration/331174-21kthreadcore22:15:293
339950,0migration/330027-21kthreadcore20:55:273
339950,0migration/328894-21kthreadcore00:45:303
339950,0migration/328038-21latency_hist20:10:093
339950,0migration/32744-21kthreadcore00:30:273
339950,0migration/326226-21taskset23:46:153
339950,0migration/325048-21munin-node23:10:243
339950,0migration/324490-21kthreadcore22:30:293
339950,0migration/324423-21taskset21:12:073
339950,0migration/318442-21kthreadcore21:50:283
339950,0migration/317288-21kthreadcore21:30:283
339950,0migration/314941-21fschecks_count00:20:233
339950,0migration/311546-21irqrtprio19:35:273
339950,0migration/310379-21aten_r1power_po20:20:213
329950,0watchdog/314898-21cut22:25:283
329950,0watchdog/313074-21kthreadcore21:05:283
329950,0watchdog/310541-21diskstats22:05:243
29815050,0irq/29-eth0-tx-8850-21ssh22:02:192
29815050,0irq/29-eth0-tx-7137-21ssh23:15:502
29815050,0irq/29-eth0-tx-4090-21munin-node23:55:312
29815050,0irq/29-eth0-tx-3300-21munin-node22:20:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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