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2026-05-27 - 19:49
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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 Wed May 27, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
616923930,0sleep20-21swapper/207:22:362
610523723,0sleep00-21swapper/007:21:540
595623627,0sleep30-21swapper/307:20:133
617823525,0sleep10-21swapper/107:22:431
63389976,0cyclictest0-21swapper/011:28:440
63409960,0cyclictest0-21swapper/211:35:302
63389960,0cyclictest0-21swapper/008:03:560
35160,0ktimersoftd/30-21swapper/310:53:473
339960,0migration/39666-21taskset07:44:323
339960,0migration/37511-21sh11:26:123
339960,0migration/35795-21kthreadcore09:14:033
339960,0migration/33826-21sh12:03:113
339960,0migration/325993-21sh09:27:423
339960,0migration/325454-21sh11:38:113
339960,0migration/319729-21sh12:09:283
339960,0migration/317640-21sh10:34:433
339960,0migration/31548-21sh11:43:023
339960,0migration/314428-21fschecks_time07:28:583
29815060,0irq/29-eth0-tx-14321-21kthreadcore11:49:022
29805060,0irq/28-eth0-rx-6675-21yum12:39:113
29805060,0irq/28-eth0-rx-25086-21kthreadcore12:14:013
29805060,0irq/28-eth0-rx-18650-21ssh09:39:103
27160,0ktimersoftd/20-21swapper/210:53:472
149960,0migration/028826-21sh12:15:420
149960,0migration/018099-21sh10:36:000
149960,0migration/015730-21sh12:45:210
8305050,0irq/26-0000:00:17678-21turbostat.cron09:23:442
63409955,0cyclictest0-21swapper/212:41:522
63409955,0cyclictest0-21swapper/210:47:152
63409955,0cyclictest0-21swapper/210:39:132
63409955,0cyclictest0-21swapper/210:31:292
63409955,0cyclictest0-21swapper/210:13:502
63409950,0cyclictest0-21swapper/210:10:312
63399954,0cyclictest3524-21snmpd11:26:011
63399950,0cyclictest0-21swapper/108:14:051
63389955,0cyclictest0-21swapper/011:13:550
63389950,0cyclictest0-21swapper/012:25:010
339950,0migration/34926-21kthreadcore08:04:023
339950,0migration/332094-21munin-node08:48:563
339950,0migration/330139-21munin-node09:09:023
339950,0migration/325809-21gltestperf08:43:583
339950,0migration/323208-21kthreadcore10:59:013
339950,0migration/319112-21kthreadcore08:59:013
339950,0migration/317176-21taskset12:48:503
339950,0migration/316283-21taskset12:46:573
339950,0migration/312750-21kthreadcore10:14:013
339950,0migration/312212-21kthreadcore08:34:003
339950,0migration/311511-21fschecks_time09:18:573
339950,0migration/310741-21switchtime12:04:083
339950,0migration/310640-21taskset09:35:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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