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2026-08-02 - 17:24
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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 50 highest latencies:
System rack1slot2.osadl.org (updated Sun Aug 02, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2444323827,0sleep00-21swapper/007:27:080
2451523526,0sleep10-21swapper/107:27:571
2450223021,0sleep30-21swapper/307:27:473
2427922925,0sleep20-21swapper/207:25:102
8305070,0irq/26-0000:00:21180-21munin-run07:49:123
339960,0migration/328673-21latency_hist10:59:133
339960,0migration/311900-21sh11:05:113
329960,0watchdog/37164-21kthreadcore10:44:323
329960,0watchdog/37164-21kthreadcore10:44:323
247009960,0cyclictest0-21swapper/207:44:252
246989963,0cyclictest28649-21kworker/0:009:39:400
246989960,0cyclictest0-21swapper/012:04:270
149960,0migration/030635-21kthreadcore09:24:310
149960,0migration/029143-21kthreadcore09:59:320
149960,0migration/02739-21sh12:17:490
149960,0migration/021045-21sh11:12:030
8305050,0irq/26-0000:00:0-21swapper/308:39:123
339950,0migration/39860-21kthreadcore08:24:363
339950,0migration/37148-21munin-node07:39:263
339950,0migration/36905-21aten_r1power_en11:24:243
339950,0migration/35627-21kthreadcore09:29:313
339950,0migration/35399-21kthreadcore07:59:283
339950,0migration/329670-21kthreadcore08:14:333
339950,0migration/328362-21kthreadcore07:29:313
339950,0migration/327546-21fschecks_count10:39:273
339950,0migration/327546-21fschecks_count10:39:273
339950,0migration/325515-21kthreadcore11:14:313
339950,0migration/325456-21kthreadcore12:29:333
339950,0migration/322767-21irqcore07:49:283
339950,0migration/321359-21munin-run08:34:123
339950,0migration/320754-21sh09:39:103
339950,0migration/31934-21kthreadcore12:54:303
339950,0migration/318543-21aten2.4-expect10:34:253
339950,0migration/315358-21kthreadcore12:04:313
339950,0migration/315054-21cpuspeed_turbos09:54:253
339950,0migration/313273-21munin-node09:09:333
329950,0watchdog/34128-21ssh09:44:523
329950,0watchdog/331522-21tr12:14:323
329950,0watchdog/330508-21kthreadcore09:24:313
329950,0watchdog/328707-21kthreadcore09:59:323
329950,0watchdog/328468-21kthreadcore11:54:323
329950,0watchdog/30-21swapper/310:04:323
329950,0watchdog/30-21swapper/308:34:233
29815050,0irq/29-eth0-tx-7322-21munin-node09:09:260
29815050,0irq/29-eth0-tx-6854-21munin-node11:24:282
29815050,0irq/29-eth0-tx-32415-21munin-node09:04:230
29815050,0irq/29-eth0-tx-3154-21munin-node10:44:262
29815050,0irq/29-eth0-tx-3154-21munin-node10:44:262
29815050,0irq/29-eth0-tx-30953-21kthreadcore12:14:322
29815050,0irq/29-eth0-tx-13556-21munin-node11:09:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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