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2026-08-30 - 23:27
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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 rack0slot5.osadl.org (updated Sun Aug 30, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
256233299656312,29cyclictest0-21swapper/522:43:5111
2562374995607,550cyclictest0-21swapper/1500:12:517
25623669954118,522cyclictest0-21swapper/1319:26:525
256235299518517,0cyclictest2651502-21kworker/10:0+i915-unordered20:52:522
256237099510480,30cyclictest0-21swapper/1419:56:526
256233899505504,1cyclictest2772732-21kworker/7:0+i915-unordered00:12:5113
256232299503503,0cyclictest0-21swapper/222:30:528
256232299502500,2cyclictest2486959-21kworker/2:3+i915-unordered19:05:528
256232299502500,2cyclictest2486959-21kworker/2:3+i915-unordered19:05:528
256231799498496,2cyclictest2708173-21kworker/1:0+i915-unordered22:07:521
256232299493463,30cyclictest0-21swapper/219:16:528
256235299489489,0cyclictest2700249-21kworker/10:2+i915-unordered22:30:522
256234699485484,1cyclictest0-21swapper/922:07:5215
2562366994813,60cyclictest2739501-21ntp_kernel_pll_22:40:135
256235299480479,1cyclictest2571098-21kworker/10:0+i915-unordered19:16:522
256237099479478,1cyclictest0-21swapper/1420:46:526
25623709947526,30cyclictest0-21swapper/1421:26:126
25623289947411,462cyclictest0-21swapper/422:07:5210
256232899472471,1cyclictest2712179-21kworker/4:1+i915-unordered22:27:5110
25623749947019,30cyclictest0-21swapper/1521:02:357
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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