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2026-08-16 - 12:48
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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 Sun Aug 16, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
625223727,0sleep30-21swapper/319:26:543
645423626,0sleep20-21swapper/219:29:092
615823228,0sleep10-21swapper/119:25:481
622822925,0sleep00-21swapper/019:26:350
8305070,0irq/26-0000:00:6734-21crond20:15:193
29805070,0irq/28-eth0-rx-29597-21munin-node23:30:353
66259965,0cyclictest0-21swapper/200:00:352
339960,0migration/36872-21sh23:53:553
339960,0migration/325535-21sh22:50:103
339960,0migration/323529-21sh00:02:403
339960,0migration/320210-21sh21:50:253
339960,0migration/319914-21sh21:50:133
339960,0migration/318670-21sh23:04:373
339960,0migration/317650-21latency_hist20:45:193
339960,0migration/315651-21sh22:41:173
339960,0migration/310019-21sh21:41:403
329960,0watchdog/332199-21python22:50:423
329960,0watchdog/314289-21kthreadcore19:55:383
329960,0watchdog/312522-21munin-node23:20:343
29805060,0irq/28-eth0-rx-3298-21grep22:55:383
29805060,0irq/28-eth0-rx-26222-21iostat20:50:363
149960,0migration/06438-21kthreadcore00:50:390
66259955,0cyclictest0-21swapper/220:00:382
66249955,0cyclictest0-21swapper/123:40:111
66249955,0cyclictest0-21swapper/123:33:151
66249955,0cyclictest0-21swapper/123:00:271
66249955,0cyclictest0-21swapper/122:44:041
66249955,0cyclictest0-21swapper/122:22:461
66249955,0cyclictest0-21swapper/122:04:391
66249955,0cyclictest0-21swapper/122:04:391
66249950,0cyclictest0-21swapper/121:57:521
66249950,0cyclictest0-21swapper/100:30:481
66249950,0cyclictest0-21swapper/100:00:121
66239955,0cyclictest0-21swapper/019:45:370
66239950,0cyclictest0-21swapper/022:12:050
4150,0ktimersoftd/00-21swapper/022:51:110
4150,0ktimersoftd/00-21swapper/000:07:100
339950,0migration/37706-21kthreadcore21:20:383
339950,0migration/34372-21gltestperf20:35:333
339950,0migration/34358-21taskset00:50:053
339950,0migration/33107-21taskset20:34:593
339950,0migration/328432-21latency_hist20:30:193
339950,0migration/327644-21kthreadcore20:05:373
339950,0migration/327445-21kthreadcore22:30:383
339950,0migration/326493-21munin-node21:35:303
339950,0migration/325904-21mdstat00:40:403
339950,0migration/320943-21latency_hist23:25:193
339950,0migration/319034-21kthreadcore21:05:393
339950,0migration/317849-21kthreadcore20:20:383
339950,0migration/317239-21kthreadcore00:55:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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