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2026-08-03 - 15:05
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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 Mon Aug 03, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2818225655,0sleep00-21swapper/007:26:060
2820624536,0sleep10-21swapper/107:26:231
2817924536,0sleep20-21swapper/207:26:042
2837523929,0sleep30-21swapper/307:28:213
339960,0migration/324105-21sh11:10:223
339960,0migration/32259-21sh11:36:093
339960,0migration/317027-21sh12:43:233
29805060,0irq/28-eth0-rx-9143-21grep10:04:363
29805060,0irq/28-eth0-rx-32263-21ssh12:33:253
29805060,0irq/28-eth0-rx-19341-21entropy11:29:323
29805060,0irq/28-eth0-rx-19244-21iostat_ios07:44:353
29805060,0irq/28-eth0-rx-13837-21df10:29:303
29805060,0irq/28-eth0-rx-12071-21diskstats10:09:313
285299966,0cyclictest7511-21diskmemload10:12:342
285299960,0cyclictest0-21swapper/209:04:182
285279965,0cyclictest17064-21cut12:24:350
285279963,0cyclictest0-21swapper/008:34:170
8305050,0irq/26-0000:00:15902-21munin-run09:34:172
8305050,0irq/26-0000:00:0-21swapper/211:04:182
339950,0migration/39305-21kthreadcore11:39:363
339950,0migration/38469-21if_eth112:19:353
339950,0migration/35023-21kthreadcore12:54:363
339950,0migration/33892-21latency_hist09:04:173
339950,0migration/332515-21aten_r1power_fr07:54:293
339950,0migration/332236-21munin-node12:49:383
339950,0migration/332183-21taskset08:37:023
339950,0migration/330559-21kthreadcore07:29:353
339950,0migration/330289-21munin-node10:19:343
339950,0migration/328691-21taskset08:56:493
339950,0migration/328405-21sh11:52:423
339950,0migration/326191-21kthreadcore10:34:363
339950,0migration/324393-21munin-node09:14:383
339950,0migration/322196-21taskset10:50:163
339950,0migration/321085-21gltestperf10:14:323
339950,0migration/319120-21fschecks_time09:54:313
339950,0migration/318862-21kthreadcore12:24:363
339950,0migration/317546-21latency_hist12:44:183
339950,0migration/317032-21latency09:09:353
339950,0migration/316697-21sendmail_mailst11:24:413
339950,0migration/316138-21kthreadcore08:24:363
339950,0migration/315028-21munin-node12:04:333
339950,0migration/312611-21kthreadcore11:04:353
329950,0watchdog/329791-21kthreadcore09:19:363
329950,0watchdog/329262-21df_abs08:14:323
329950,0watchdog/328071-21kthreadcore07:49:363
329950,0watchdog/325762-21kthreadcore08:09:363
329950,0watchdog/310246-21python09:04:443
29815050,0irq/29-eth0-tx-3612-21munin-node07:34:320
29815050,0irq/29-eth0-tx-30521-21kthreadcore10:19:352
29815050,0irq/29-eth0-tx-29145-21munin-node08:59:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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