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2026-03-23 - 15:19
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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 Mon Mar 23, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40266449950985,423cyclictest59057-21kworker/11:1+i915-unordered23:53:503
402662699502501,1cyclictest35111-21kworker/7:0+i915-unordered23:25:5013
402664499492490,1cyclictest4172231-21kworker/11:2+i915-unordered22:50:503
402664499492490,1cyclictest4039272-21kworker/11:1+i915-unordered19:48:503
402664499489488,1cyclictest4095646-21kworker/11:1+i915-unordered20:33:503
402664499485484,1cyclictest4172231-21kworker/11:2+i915-unordered22:11:503
402664499484482,2cyclictest4059570-21kworker/11:2+i915-unordered20:35:503
402664499475473,2cyclictest4059570-21kworker/11:2+i915-unordered19:55:503
402664499474473,1cyclictest4156151-21kworker/11:2+i915-unordered21:47:503
402666299468411,29cyclictest0-21swapper/1521:18:507
402662699468467,1cyclictest4164178-21kworker/7:0+i915-unordered22:31:5013
40266449946516,448cyclictest0-21swapper/1123:58:503
402662699464463,1cyclictest4132103-21kworker/7:1+i915-unordered21:18:5013
40266449946124,437cyclictest0-21swapper/1122:31:503
40266449945919,439cyclictest0-21swapper/1120:28:503
40266079945914,30cyclictest0-21swapper/223:26:348
40266629945814,443cyclictest0-21swapper/1523:06:507
402662699454454,0cyclictest0-21swapper/720:06:5013
402662699452451,1cyclictest55216-21kworker/7:0+i915-unordered23:58:5013
40266059945128,30cyclictest4118824-21ntpq21:00:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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