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2026-08-12 - 06:03
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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 12, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3270528075,0sleep10-21swapper/119:29:471
3252524836,0sleep20-21swapper/219:27:402
3266124334,0sleep30-21swapper/319:29:173
3267323827,0sleep00-21swapper/019:29:260
324991111,0cyclictest83050irq/26-0000:00:23:36:332
35170,0ktimersoftd/30-21swapper/300:25:273
8305060,0irq/26-0000:00:22311-21perf20:29:593
4160,0ktimersoftd/00-21swapper/023:27:050
339960,0migration/329724-21sh00:46:123
339960,0migration/324936-21sh23:48:443
339960,0migration/312795-21sh23:03:283
339960,0migration/311675-21munin-node00:00:183
3249966,0cyclictest11883-21diskmemload22:20:332
29815060,0irq/29-eth0-tx-0-21swapper/021:25:220
29805060,0irq/28-eth0-rx-7883-21munin-run20:19:593
29805060,0irq/28-eth0-rx-23743-21grep22:30:173
29805060,0irq/28-eth0-rx-13924-21memory22:05:183
27160,0ktimersoftd/20-21swapper/223:27:052
149960,0migration/05348-21sh23:16:310
149960,0migration/05188-21sh21:43:550
149960,0migration/018404-21kthreadcore19:40:170
8305050,0irq/26-0000:00:0-21swapper/320:59:593
339950,0migration/39648-21timerandwakeup22:40:243
339950,0migration/39213-21kthreadcore23:20:153
339950,0migration/37021-21diskmemload00:54:153
339950,0migration/3469-21latency_hist19:29:593
339950,0migration/34147-21kthreadcore23:35:183
339950,0migration/332031-21kthreadcore21:40:203
339950,0migration/33130-21kthreadcore22:00:183
339950,0migration/33103-21munin-node19:50:193
339950,0migration/330634-21kthreadcore22:15:193
339950,0migration/327558-21kthreadcore20:30:193
339950,0migration/326565-21taskset00:07:563
339950,0migration/324863-21pmu-power20:05:203
339950,0migration/323919-21kthreadcore22:50:193
339950,0migration/323611-21kthreadcore21:35:183
339950,0migration/322645-21fschecks_count23:10:143
339950,0migration/320445-21kthreadcore21:50:193
339950,0migration/317079-21kthreadcore23:25:203
339950,0migration/316578-21kthreadcore00:40:183
339950,0migration/314186-21unixbench-2d00:55:273
339950,0migration/312599-21cpuspeed_turbos00:20:133
339950,0migration/311902-21sh00:19:353
339950,0migration/31171-21sh23:53:573
339950,0migration/311072-21kthreadcore19:35:173
339950,0migration/310822-21rt-features20:40:223
3249955,0cyclictest0-21swapper/223:33:132
3249955,0cyclictest0-21swapper/222:33:282
3249955,0cyclictest0-21swapper/222:00:312
3249955,0cyclictest0-21swapper/200:54:062
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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