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2026-06-23 - 04:09
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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 Tue Jun 23, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2832825344,0sleep20-21swapper/219:24:342
2829624837,0sleep00-21swapper/019:24:080
2821123525,0sleep10-21swapper/119:23:091
2815523228,0sleep30-21swapper/319:22:313
28521991919,0cyclictest0-21swapper/221:27:512
339960,0migration/39575-21sh23:55:553
339960,0migration/36544-21sh00:47:293
339960,0migration/331706-21switchtime21:36:183
339960,0migration/328766-21sh00:25:043
339960,0migration/328044-21kthreadcore19:46:113
339960,0migration/321765-21sh23:24:353
339960,0migration/316923-21taskset23:57:213
339960,0migration/312579-21sh00:31:373
329960,0watchdog/37617-21perl22:21:093
329960,0watchdog/328719-21kthreadcore23:46:133
29815060,0irq/29-eth0-tx-17842-21munin-node22:46:102
29805060,0irq/28-eth0-rx-522-21kthreadcore22:16:133
29805060,0irq/28-eth0-rx-30228-21perl00:26:083
29805060,0irq/28-eth0-rx-19214-21kthreadcore22:26:133
29805060,0irq/28-eth0-rx-19143-21cut23:41:113
285199965,0cyclictest4812-21sort19:31:100
285199965,0cyclictest10435-21sed22:41:080
149960,0migration/04961-21sh00:29:390
4150,0ktimersoftd/00-21swapper/022:16:320
339950,0migration/38126-21aten_r1power_en00:51:073
339950,0migration/37105-21taskset20:37:463
339950,0migration/35395-21kthreadcore22:56:123
339950,0migration/34059-21fschecks_count00:11:073
339950,0migration/33089-21kthreadcore21:21:133
339950,0migration/329484-21taskset21:56:093
339950,0migration/328385-21taskset20:06:543
339950,0migration/328257-21kthreadcore20:31:103
339950,0migration/324830-21kthreadcore23:26:123
339950,0migration/324317-21timerandwakeup22:46:203
339950,0migration/324125-21latency_hist22:30:543
339950,0migration/322839-21latency_hist00:40:553
339950,0migration/322096-21kthreadcore21:31:123
339950,0migration/320843-21kthreadcore19:41:103
339950,0migration/320415-21munin-node23:06:063
339950,0migration/317763-21unixbench-2d21:06:193
339950,0migration/315361-21fschecks_time20:01:073
339950,0migration/313856-21fschecks_count22:06:083
339950,0migration/311026-21kthreadcore20:41:123
339950,0migration/310968-21aten_r1power_vo19:36:053
339950,0migration/310480-21taskset20:16:323
329950,0watchdog/39946-21sort21:01:133
329950,0watchdog/37939-21kthreadcore23:16:133
329950,0watchdog/33123-21ssh23:11:213
329950,0watchdog/3298050irq/28-eth0-rx-22:44:533
329950,0watchdog/318080-21ssh21:47:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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