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2026-08-19 - 04:03
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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 Wed Aug 19, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2927326059,0sleep30-21swapper/319:28:203
2909924031,0sleep20-21swapper/219:26:192
2934023324,0sleep10-21swapper/119:29:061
2932323127,0sleep00-21swapper/019:28:570
35160,0ktimersoftd/30-21swapper/300:30:513
339960,0migration/34401-21sh23:39:543
339960,0migration/330834-21sh22:38:343
339960,0migration/329191-21sh22:19:123
339960,0migration/324727-21sh21:38:103
339960,0migration/317827-21munin-node23:25:543
339960,0migration/317083-21sh21:50:543
29815060,0irq/29-eth0-tx-4592-21munin-node19:35:550
29805060,0irq/28-eth0-rx-24874-21turbostat22:55:343
29805060,0irq/28-eth0-rx-0-21swapper/300:41:533
149960,0migration/028012-21sh23:34:150
8305050,0irq/26-0000:00:24753-21ssh21:38:152
8305050,0irq/26-0000:00:21667-21swap00:06:012
339950,0migration/33693-21munin-node23:20:503
339950,0migration/332676-21cpuspeed_turbos00:15:473
339950,0migration/330423-21diskmemload22:00:513
339950,0migration/327494-21irqcore19:50:523
339950,0migration/325165-21taskset22:55:463
339950,0migration/324323-21taskset00:27:223
339950,0migration/324147-21irqcore20:55:523
339950,0migration/322508-21kthreadcore19:45:493
339950,0migration/319382-21gltestperf23:10:493
339950,0migration/31904-21gltestperf19:55:483
339950,0migration/318335-21kthreadcore20:05:533
339950,0migration/312584-21munin-run22:10:343
339950,0migration/311987-21kthreadcore22:25:543
339950,0migration/311987-21kthreadcore22:25:543
339950,0migration/31130-21munin-node20:40:453
339950,0migration/311218-21switchtime21:05:583
339950,0migration/310248-21kernelversion21:30:523
329950,0watchdog/39125-21sh23:04:133
329950,0watchdog/38474-21kthreadcore19:35:523
329950,0watchdog/34924-21kthreadcore21:25:533
329950,0watchdog/34318-21grep00:35:533
329950,0watchdog/328641-21grep20:35:533
329950,0watchdog/32197-21sh00:51:493
329950,0watchdog/320301-21perl21:55:493
329950,0watchdog/317994-21kthreadcore22:30:533
329950,0watchdog/314086-21cut20:45:533
329950,0watchdog/312633-21perl19:40:483
329950,0watchdog/310195-21kthreadcore22:45:533
329950,0watchdog/30-21swapper/321:15:533
29815050,0irq/29-eth0-tx-7906-21ssh00:19:202
29815050,0irq/29-eth0-tx-6741-21munin-node00:01:002
29815050,0irq/29-eth0-tx-29856-21munin-node20:15:580
29815050,0irq/29-eth0-tx-0-21swapper/222:36:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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