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2026-04-07 - 17:21
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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 100 highest latencies:
System rack1slot2.osadl.org (updated Tue Apr 07, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2239828783,0sleep20-21swapper/207:18:452
2244427261,0sleep00-21swapper/007:19:190
2229425453,0sleep10-21swapper/107:17:361
22545994646,0cyclictest2900-21md1_resync09:11:572
2237623627,0sleep30-21swapper/307:18:303
22544992626,0cyclictest191ktimersoftd/109:11:571
8305060,0irq/26-0000:00:3957-21kthreadcore08:09:563
8305060,0irq/26-0000:00:3383-21iostat07:49:533
8305060,0irq/26-0000:00:28444-21crond08:29:373
8305060,0irq/26-0000:00:23126-21port_sshpriv07:59:563
8305060,0irq/26-0000:00:152142sleep309:04:193
35160,0ktimersoftd/30-21swapper/309:07:243
339960,0migration/329993-21sh11:20:453
339960,0migration/327126-21diskmemload11:56:093
339960,0migration/327126-21diskmemload11:56:093
339960,0migration/324767-21sh12:33:173
339960,0migration/322789-21sh09:29:483
339960,0migration/318054-21sh12:46:083
339960,0migration/313498-21sh11:13:363
29805060,0irq/28-eth0-rx-7706-21if_err_eth108:14:533
259960,0migration/214003-21latency12:24:572
225459960,0cyclictest0-21swapper/210:22:082
225449966,0cyclictest0-21swapper/108:12:461
225449960,0cyclictest0-21swapper/108:40:121
225439966,0cyclictest3524-21snmpd12:37:240
225439960,0cyclictest10792-21latency_hist11:49:370
149960,0migration/09067-21sh09:55:010
149960,0migration/027981-21sh10:07:490
149960,0migration/018596-21sh10:56:430
149960,0migration/016359-21fschecks_time09:04:490
149960,0migration/015037-21sh11:30:080
149960,0migration/014157-21aten_r1power_vo08:19:480
8305050,0irq/26-0000:00:9802-21irqrtprio10:34:522
8305050,0irq/26-0000:00:8943-21sed10:50:022
8305050,0irq/26-0000:00:6681-21sed10:14:532
8305050,0irq/26-0000:00:6074-21kthreadcore08:54:563
8305050,0irq/26-0000:00:5933-21kthreadcore08:34:553
8305050,0irq/26-0000:00:3978-21kthreadcore11:44:532
8305050,0irq/26-0000:00:3569-21ssh11:05:462
8305050,0irq/26-0000:00:32684-21ssh09:34:512
8305050,0irq/26-0000:00:32031-21python12:35:022
8305050,0irq/26-0000:00:3086-21cut12:19:552
8305050,0irq/26-0000:00:29797-21timerwakeupswit10:25:032
8305050,0irq/26-0000:00:29361-21timerwakeupswit12:15:022
8305050,0irq/26-0000:00:28144-21cut08:04:523
8305050,0irq/26-0000:00:2704-21python12:00:002
8305050,0irq/26-0000:00:26051-21df11:39:492
8305050,0irq/26-0000:00:25283-21ssh10:43:442
8305050,0irq/26-0000:00:24966-21kthreadcore07:19:533
8305050,0irq/26-0000:00:21493-21grep09:44:562
8305050,0irq/26-0000:00:20910-21perl10:04:502
8305050,0irq/26-0000:00:17972-21idleruntime11:34:522
8305050,0irq/26-0000:00:164072sleep307:56:373
8305050,0irq/26-0000:00:14648-21perl09:24:502
8305050,0irq/26-0000:00:13798-21ssh11:14:282
8305050,0irq/26-0000:00:12960-21kthreadcore09:59:542
8305050,0irq/26-0000:00:12071-21munin-node11:49:522
8305050,0irq/26-0000:00:11466-21rt-features07:29:573
8305050,0irq/26-0000:00:11287-21diskstats12:44:502
8305050,0irq/26-0000:00:11102-21latency_hist10:54:372
8305050,0irq/26-0000:00:0-21swapper/308:29:553
8305050,0irq/26-0000:00:0-21swapper/308:19:543
8305050,0irq/26-0000:00:0-21swapper/211:14:552
339950,0migration/39379-21idleruntime10:34:503
339950,0migration/3454-21kthreadcore09:14:523
339950,0migration/3376-21gltestperf10:29:513
339950,0migration/33212-21kthreadcore11:24:563
339950,0migration/328900-21cpu11:59:493
339950,0migration/328242-21munin-node07:44:513
339950,0migration/327846-21kthreadcore09:49:543
339950,0migration/325055-21kthreadcore07:39:553
339950,0migration/317766-21fschecks_time10:39:503
339950,0migration/317683-21pmu-power09:59:583
339950,0migration/314874-21kthreadcore07:34:543
339950,0migration/314718-21kthreadcore08:39:533
329950,0watchdog/33991-21ssh10:11:283
329950,0watchdog/331832-21expr11:39:563
329950,0watchdog/315883-21cut10:54:563
329950,0watchdog/314396-21aten_r1power_po10:19:483
329950,0watchdog/30-21swapper/312:19:483
29815050,0irq/29-eth0-tx-5120-21ssh12:04:492
29815050,0irq/29-eth0-tx-28206-21grep11:19:552
29815050,0irq/29-eth0-tx-19884-21munin-node11:54:562
29815050,0irq/29-eth0-tx-19884-21munin-node11:54:562
29815050,0irq/29-eth0-tx-10502-21ssh09:58:042
29815050,0irq/29-eth0-tx-0-21swapper/209:50:142
29815050,0irq/29-eth0-tx-0-21swapper/209:43:112
29805050,0irq/28-eth0-rx-9835-21ssh12:42:343
29805050,0irq/28-eth0-rx-4257-21cut11:44:533
29805050,0irq/28-eth0-rx-10902-21kthreadcore09:19:553
29805050,0irq/28-eth0-rx-10125-21cat11:29:553
29805050,0irq/28-eth0-rx-0-21swapper/312:34:563
29805050,0irq/28-eth0-rx-0-21swapper/312:24:523
29805050,0irq/28-eth0-rx-0-21swapper/312:09:593
29805050,0irq/28-eth0-rx-0-21swapper/311:54:043
29805050,0irq/28-eth0-rx-0-21swapper/311:14:503
29805050,0irq/28-eth0-rx-0-21swapper/311:06:313
29805050,0irq/28-eth0-rx-0-21swapper/310:59:543
29805050,0irq/28-eth0-rx-0-21swapper/310:24:563
29805050,0irq/28-eth0-rx-0-21swapper/309:44:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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