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2026-07-31 - 05:42
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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 31, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1303329187,0sleep30-21swapper/319:26:223
1298924031,0sleep20-21swapper/219:25:532
1300323825,0sleep10-21swapper/119:26:041
1305723322,0sleep00-21swapper/019:26:390
35160,0ktimersoftd/30-21swapper/300:06:453
339960,0migration/330352-21sh22:26:593
339960,0migration/32649-21sh23:09:063
339960,0migration/325891-21sh00:35:403
339960,0migration/32154-21sh23:08:203
339960,0migration/319579-21sh22:01:033
339960,0migration/318357-21sh00:33:323
339960,0migration/31708-21munin-node20:24:203
339960,0migration/31177-21sh00:23:303
29815060,0irq/29-eth0-tx-20577-21munin-node00:54:282
29805060,0irq/28-eth0-rx-28819-21perl19:39:133
29805060,0irq/28-eth0-rx-24756-21if_eth1.323:59:173
29805060,0irq/28-eth0-rx-17333-21diskstats00:14:143
149960,0migration/09328-21unixbench-2d19:44:250
149960,0migration/05685-21idleruntime23:29:160
149960,0migration/019340-21fschecks_time21:44:150
149960,0migration/016074-21sh00:12:250
133259964,0cyclictest0-21swapper/123:19:151
133249960,0cyclictest0-21swapper/000:30:540
8305050,0irq/26-0000:00:2702-21kthreadcore22:49:202
8305050,0irq/26-0000:00:14109-21sed22:19:002
8305050,0irq/26-0000:00:0-21swapper/320:44:113
4150,0ktimersoftd/00-21swapper/000:43:410
35150,0ktimersoftd/30-21swapper/322:46:403
339950,0migration/39770-21taskset19:48:083
339950,0migration/39076-21munin-node20:29:203
339950,0migration/38986-21kthreadcore22:14:193
339950,0migration/37474-21taskset22:34:063
339950,0migration/36428-21taskset20:52:413
339950,0migration/34119-21munin-node21:14:153
339950,0migration/332176-21kthreadcore23:44:203
339950,0migration/329478-21munin-node22:09:123
339950,0migration/328914-21diskmemload23:40:493
339950,0migration/32591-21kthreadcore22:49:203
339950,0migration/320904-21munin-node23:19:193
339950,0migration/319996-21kthreadcore22:59:173
339950,0migration/31913-21munin-node21:09:193
339950,0migration/314838-21latency_hist23:54:013
339950,0migration/313726-21kthreadcore00:09:183
339950,0migration/311439-21aten_r1power_po23:14:133
329950,0watchdog/39562-21aten2.4-expect22:54:123
329950,0watchdog/35841-40yum-updatesd-he22:29:593
329950,0watchdog/33259-21munin-node00:24:203
329950,0watchdog/331979-21kthreadcore21:49:193
329950,0watchdog/324862-21cut22:04:193
329950,0watchdog/322278-21if_eth121:04:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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