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2026-06-26 - 01:32
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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 Jun 26, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
239725745,0sleep30-21swapper/319:22:203
233923228,0sleep10-21swapper/119:21:381
260023127,0sleep20-21swapper/219:24:312
261322723,0sleep00-21swapper/019:24:410
339960,0migration/39991-21sh21:57:463
339960,0migration/3586-21sh22:50:543
339960,0migration/322645-21munin-node00:16:323
339960,0migration/32133-21sh00:21:563
339960,0migration/320383-21sh22:06:213
339960,0migration/319413-21sh00:31:393
339960,0migration/313454-21sh00:47:413
339960,0migration/312928-21sh23:32:443
29805060,0irq/28-eth0-rx-4988-21cut00:26:243
29805060,0irq/28-eth0-rx-24341-21ssh23:58:563
29805060,0irq/28-eth0-rx-22022-21ps23:21:263
29805060,0irq/28-eth0-rx-18678-21ssh22:02:523
29805060,0irq/28-eth0-rx-17391-21iostat_ios22:41:263
29805060,0irq/28-eth0-rx-16171-21grep20:41:253
29805060,0irq/28-eth0-rx-14340-21tr19:31:263
28219960,0cyclictest0-21swapper/122:26:251
4150,0ktimersoftd/00-21swapper/023:51:330
4150,0ktimersoftd/00-21swapper/022:30:360
339950,0migration/37408-21latency_hist22:36:093
339950,0migration/34067-21munin-node23:11:243
339950,0migration/328723-21kthreadcore19:41:253
339950,0migration/326797-21irqcore00:01:263
339950,0migration/323899-21timerwakeupswit19:36:323
339950,0migration/319736-21latency22:21:293
339950,0migration/317621-21kthreadcore00:51:273
339950,0migration/317319-21sshd21:02:203
339950,0migration/312587-21kthreadcore23:51:273
339950,0migration/31122-21taskset21:52:413
339950,0migration/311015-21kthreadcore19:51:273
339950,0migration/310807-21cpuspeed_turbos20:16:203
339950,0migration/310091-21cpuspeed_turbos22:56:203
339950,0migration/310078-21sshd20:13:163
329950,0watchdog/34687-21iostat_ios20:56:233
329950,0watchdog/331803-21munin-node22:31:243
329950,0watchdog/328473-21sed22:26:283
329950,0watchdog/322207-21perl00:36:243
329950,0watchdog/310499-21cut21:21:273
29815050,0irq/29-eth0-tx-5108-21munin-node22:16:262
29815050,0irq/29-eth0-tx-27602-21iostat_ios21:51:262
29815050,0irq/29-eth0-tx-24132-21ls21:31:242
29815050,0irq/29-eth0-tx-18065-21ssh00:14:062
29815050,0irq/29-eth0-tx-0-21swapper/223:31:262
29815050,0irq/29-eth0-tx-0-21swapper/223:24:162
29815050,0irq/29-eth0-tx-0-21swapper/222:47:272
29805050,0irq/28-eth0-rx-23774-21grep23:01:283
29805050,0irq/28-eth0-rx-2036-21kthreadcore23:46:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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