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2026-07-15 - 09:16
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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 20 highest latencies:
System rack8slot2.osadl.org (updated Wed Jul 15, 2026 00:43:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
288938699299179,108cyclictest171ktimers/023:25:200
28893899916221,47cyclictest2921044-21kworker/u16:4+xprtiod21:20:233
288938799139130,5cyclictest79-21hwrng23:52:221
288938899138120,15cyclictest79-21hwrng22:44:472
2889387991384,75cyclictest3058375-21sshd-session00:05:301
288938699138128,7cyclictest79-21hwrng00:01:350
28893889913765,38cyclictest2972043-21kworker/u16:5+rpciod22:21:052
28893899913610,11cyclictest3073379-21ntpq00:26:053
28893899913610,11cyclictest3073379-21ntpq00:26:053
28893869913261,14cyclictest0-21swapper/022:20:460
288938799131121,7cyclictest79-21hwrng22:59:071
288938999129116,10cyclictest79-21hwrng21:56:393
288938999129116,10cyclictest79-21hwrng21:56:393
2889386991261,78cyclictest2974662-21ntpq22:05:590
288938699124109,6cyclictest79-21hwrng00:15:550
28893869912312,108cyclictest10350irq/131-8000000.ethernet-tx220:39:590
28893869912312,108cyclictest10350irq/131-8000000.ethernet-tx220:39:590
288938699123112,7cyclictest79-21hwrng00:11:490
288938799122107,5cyclictest79-21hwrng00:17:581
288938799121113,5cyclictest79-21hwrng22:10:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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