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2026-08-27 - 06:34
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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 Thu Aug 27, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2503224637,0sleep20-21swapper/219:29:272
2517124334,0sleep10-21swapper/119:31:021
2501323026,0sleep30-21swapper/319:29:123
2482323026,0sleep00-21swapper/019:26:570
339970,0migration/330971-21sh23:20:163
339970,0migration/311824-21sh00:22:303
339960,0migration/37595-21sh00:59:143
339960,0migration/37039-21sh22:06:543
339960,0migration/327718-21munin-node22:56:393
29815060,0irq/29-eth0-tx-32719-21munin-node19:36:330
29805060,0irq/28-eth0-rx-28019-21port_sshpriv21:41:363
29805060,0irq/28-eth0-rx-19091-21cut21:56:303
27160,0ktimersoftd/20-21swapper/200:21:042
252589960,0cyclictest0-21swapper/222:19:412
252569966,0cyclictest0-21swapper/022:21:080
252569960,0cyclictest0-21swapper/021:46:360
149960,0migration/08895-21sh23:44:390
149960,0migration/022338-21aten_r1power_vo20:36:240
149960,0migration/019094-21fschecks_time23:51:280
8305050,0irq/26-0000:00:19739-21dump-pmu-power00:11:142
339950,0migration/38796-21munin-node19:41:273
339950,0migration/3806-21timerwakeupswit23:56:383
339950,0migration/35804-21kthreadcore22:26:313
339950,0migration/34618-21munin-node20:46:263
339950,0migration/33900-21kthreadcore21:06:303
339950,0migration/33872-21latency_hist22:46:133
339950,0migration/33455-21fschecks_count00:01:263
339950,0migration/332629-21latency_hist19:36:133
339950,0migration/332075-21munin-node22:21:343
339950,0migration/330161-21fschecks_count21:26:273
339950,0migration/328290-21switchtime19:51:403
339950,0migration/325276-21taskset20:14:053
339950,0migration/324866-21fschecks_time22:01:273
339950,0migration/324089-21kthreadcore20:36:293
339950,0migration/319875-21fschecks_time22:36:273
339950,0migration/31642-21kthreadcore23:21:303
339950,0migration/314727-21sh00:45:373
339950,0migration/313357-21cpuspeed_turbos21:36:253
339950,0migration/310300-21irqrtprio22:11:303
329950,0watchdog/36978-21sed20:21:363
329950,0watchdog/36978-21sed20:21:363
329950,0watchdog/36814-21perl23:06:243
329950,0watchdog/330749-21grep22:41:323
329950,0watchdog/330295-21perl20:41:283
329950,0watchdog/329284-21aten2.4-expect19:56:243
329950,0watchdog/317179-21kthreadcore23:11:323
329950,0watchdog/30-21swapper/323:26:333
329950,0watchdog/30-21swapper/321:16:323
29815050,0irq/29-eth0-tx-7596-21munin-node19:41:300
29815050,0irq/29-eth0-tx-11524-21munin-node20:51:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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