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2026-04-09 - 13:03
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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 Apr 09, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
441525041,0sleep10-21swapper/119:15:561
439523526,0sleep30-21swapper/319:15:423
439923228,0sleep20-21swapper/219:15:452
463723127,0sleep00-21swapper/019:18:270
48169976,0cyclictest0-21swapper/000:29:450
339970,0migration/38709-21sh21:31:133
8305060,0irq/26-0000:00:11124-21awk00:04:452
339960,0migration/37467-21sh23:40:553
339960,0migration/332331-21sh21:26:373
339960,0migration/331819-21sh23:37:403
339960,0migration/33021-21sh21:47:263
339960,0migration/326401-21sh23:54:523
339960,0migration/326255-21sh21:41:033
339960,0migration/321037-21sh23:13:153
339960,0migration/318794-21mdstat21:55:033
339960,0migration/317115-21sh23:48:473
29815060,0irq/29-eth0-tx-9098-21munin-node21:14:550
29805060,0irq/28-eth0-rx-9486-21perl22:29:573
179960,0migration/114754-21munin-node22:30:031
149960,0migration/03540-21kthreadcore19:39:590
149960,0migration/024355-21latency_hist00:49:450
149960,0migration/01111-21taskset22:42:410
149960,0migration/011038-21sh21:50:310
8305050,0irq/26-0000:00:17015-21latency_hist22:34:442
48199955,0cyclictest0-21swapper/200:40:112
48199955,0cyclictest0-21swapper/200:40:112
48199950,0cyclictest0-21swapper/223:00:332
48179955,0cyclictest0-21swapper/123:25:321
48179955,0cyclictest0-21swapper/123:05:021
48179955,0cyclictest0-21swapper/122:45:391
48179955,0cyclictest0-21swapper/122:01:111
48179955,0cyclictest0-21swapper/121:31:331
48179955,0cyclictest0-21swapper/100:33:291
48179954,0cyclictest3524-21snmpd21:04:431
48179950,0cyclictest0-21swapper/122:29:341
48169955,0cyclictest0-21swapper/023:22:350
48169955,0cyclictest0-21swapper/022:37:580
48169955,0cyclictest0-21swapper/000:00:350
48169950,0cyclictest0-21swapper/022:02:390
339950,0migration/38430-21munin-node21:10:093
339950,0migration/37226-21diskmemload00:39:453
339950,0migration/37226-21diskmemload00:39:453
339950,0migration/36246-21taskset20:04:583
339950,0migration/35232-21taskset22:07:163
339950,0migration/34268-21kthreadcore22:25:023
339950,0migration/33706-21irqrtprio22:45:013
339950,0migration/332003-21if_err_eth000:35:013
339950,0migration/331527-21munin-node20:44:583
339950,0migration/328579-21kthreadcore20:20:013
339950,0migration/325524-21kthreadcore21:00:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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