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2026-07-18 - 09:48
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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 Sat Jul 18, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1640524940,0sleep20-21swapper/219:27:002
1628424434,0sleep30-21swapper/319:25:373
1624723829,0sleep10-21swapper/119:25:111
1612922925,0sleep00-21swapper/019:23:450
339970,0migration/328045-21munin-node23:48:153
165579976,0cyclictest0-21swapper/200:02:372
165579970,0cyclictest2248-40yum-updatesd-he21:28:252
165579970,0cyclictest16889-21grep23:08:132
35160,0ktimersoftd/30-21swapper/322:46:153
35160,0ktimersoftd/30-21swapper/322:02:343
339960,0migration/36099-21sh22:27:023
339960,0migration/33290-21sh22:58:543
339960,0migration/329063-21sh21:43:253
339960,0migration/322858-21missed_timers00:03:143
339960,0migration/320545-21sh22:17:303
339960,0migration/32004-21sh00:12:253
339960,0migration/312853-21if_eth1.200:18:143
339960,0migration/310950-21sh23:38:443
29815060,0irq/29-eth0-tx-0-21swapper/019:35:260
29805060,0irq/28-eth0-rx-4194-21irqstats00:13:133
29805060,0irq/28-eth0-rx-31664-21grep23:33:133
29805060,0irq/28-eth0-rx-29542-21sed21:28:133
19160,0ktimersoftd/10-21swapper/100:35:211
165579960,0cyclictest0-21swapper/222:03:352
149960,0migration/07831-21munin-run21:52:560
149960,0migration/027696-21sh00:23:580
149960,0migration/023143-21kthreadcore22:18:140
149960,0migration/019184-21gltestperf23:28:110
149960,0migration/017082-21sh00:53:350
149960,0migration/016616-21kthreadcore21:18:140
8305050,0irq/26-0000:00:6199-21kthreadcore20:03:143
339950,0migration/39259-21aten_r1power_en23:23:073
339950,0migration/39176-21munin-node20:48:203
339950,0migration/37623-21kthreadcore23:03:143
339950,0migration/33422-21kthreadcore19:38:133
339950,0migration/328780-21idleruntime20:43:113
339950,0migration/326658-21kthreadcore00:43:123
339950,0migration/326399-21latency20:38:143
339950,0migration/325825-21kernelversion21:03:133
339950,0migration/324539-21fschecks_count19:33:113
339950,0migration/324502-21idleruntime23:13:133
339950,0migration/318657-21kthreadcore21:18:153
339950,0migration/316154-21kthreadcore23:08:133
339950,0migration/316138-21munin-node22:33:083
339950,0migration/315138-21taskset22:32:053
339950,0migration/313638-21kthreadcore23:58:153
339950,0migration/313196-21kthreadcore00:53:143
339950,0migration/312592-21kthreadcore20:08:133
339950,0migration/31150-21munin-node19:58:143
329950,0watchdog/39717-21sh00:52:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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