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2026-07-17 - 07:21
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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 Jul 17, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
129023624,0sleep20-21swapper/219:27:472
104523524,0sleep00-21swapper/019:24:570
99723425,0sleep10-21swapper/119:24:221
128323425,0sleep30-21swapper/319:27:443
1363991111,0cyclictest8612-21sensors23:48:150
1363991111,0cyclictest3571-21lldpd21:24:060
339960,0migration/35484-21sh22:02:223
339960,0migration/327259-21sh23:58:353
339960,0migration/323079-21irqrtprio23:23:093
339960,0migration/316460-21sh23:00:423
339960,0migration/315105-21latency_hist00:12:513
329960,0watchdog/323907-21if_err_eth1.222:48:063
29805060,0irq/28-eth0-rx-2085-21port_sshpriv00:38:133
29805060,0irq/28-eth0-rx-18149-21diskstats23:03:063
29805060,0irq/28-eth0-rx-16518-21iostat00:13:083
29805060,0irq/28-eth0-rx-13004-21diskstats23:18:063
29805060,0irq/28-eth0-rx-12548-21iostat_ios23:53:093
29805060,0irq/28-eth0-rx-11439-21iostat_ios00:28:093
149960,0migration/07573-21taskset22:56:050
149960,0migration/029843-21sh23:26:420
149960,0migration/025628-21sh23:05:590
149960,0migration/023714-21sh23:39:310
149960,0migration/022343-21sh22:09:320
149960,0migration/021401-21ntp_offset00:13:120
149960,0migration/014035-21sh22:06:170
149960,0migration/013236-21sh00:08:560
149960,0migration/011969-21sh22:39:270
339950,0migration/3960-21taskset00:22:593
339950,0migration/37926-21taskset22:56:533
339950,0migration/36277-21gltestperf19:53:043
339950,0migration/36198-21df_abs21:23:043
339950,0migration/35208-21taskset23:28:393
339950,0migration/34854-21sh21:38:143
339950,0migration/33877-21kthreadcore21:18:093
339950,0migration/326227-21sendmail_mailqu20:48:133
339950,0migration/325787-21kthreadcore00:53:103
339950,0migration/325192-21kthreadcore20:03:113
339950,0migration/32144-21fschecks_count19:28:043
339950,0migration/318359-21kthreadcore21:08:083
339950,0migration/317586-21irqrtprio19:38:063
339950,0migration/316944-21fschecks_count20:23:053
339950,0migration/314521-21munin-node21:28:073
339950,0migration/312417-21kthreadcore21:03:093
339950,0migration/311898-21runrttasks00:43:363
339950,0migration/310084-21idleruntime20:18:063
339950,0migration/310039-21kthreadcore23:33:103
329950,0watchdog/3984-21kthreadcore00:03:113
329950,0watchdog/386932chrt22:20:423
329950,0watchdog/327557-21grep23:08:063
329950,0watchdog/326873-21sh22:30:583
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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