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2026-05-09 - 02:18
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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
Characteristics of the 20 highest latencies:
System rack6slot2.osadl.org (updated Sat May 09, 2026 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
256132438,8sleep00-21swapper/019:05:140
25942993635,0cyclictest168750irq/16-i91520:30:291
25942993433,0cyclictest168750irq/16-i91522:01:411
25942993433,0cyclictest168750irq/16-i91519:45:461
25942993433,0cyclictest168750irq/16-i91519:26:501
25942993433,0cyclictest168750irq/16-i91500:21:501
25942993433,0cyclictest168750irq/16-i91500:00:151
25942993432,1cyclictest168750irq/16-i91522:27:581
25941993433,0cyclictest246650irq/16-enp2s0f022:03:200
25941993433,0cyclictest246650irq/16-enp2s0f019:19:380
25941993432,1cyclictest246650irq/16-enp2s0f022:38:030
25941993432,1cyclictest246650irq/16-enp2s0f020:05:450
25942993333,0cyclictest168750irq/16-i91521:45:541
25942993332,0cyclictest246650irq/16-enp2s0f023:53:421
25942993332,0cyclictest246650irq/16-enp2s0f023:27:161
25942993332,0cyclictest246650irq/16-enp2s0f022:08:071
25942993332,0cyclictest246650irq/16-enp2s0f020:58:151
25942993332,0cyclictest246650irq/16-enp2s0f019:31:071
25942993332,0cyclictest168750irq/16-i91523:29:291
25942993332,0cyclictest168750irq/16-i91523:18:371
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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