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2026-05-04 - 19:16
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Mon May 04, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284656721010,2sleep30-21swapper/307:15:273
32032442990,2sleep30-21swapper/311:28:093
31694732850,2sleep30-21swapper/311:05:323
2837003993015,10cyclictest0-21swapper/010:00:020
2837003992814,10cyclictest3159030-21cstates11:00:250
2837003992613,9cyclictest3130631-21kthreadcore10:40:300
32181342240,2sleep20-21swapper/211:36:222
2837004992421,2cyclictest2290644-1atop11:30:011
2837003992417,6cyclictest3204064-21latency_hist11:30:020
283700599236,10cyclictest0-21swapper/208:30:012
2837004992315,3cyclictest3136710-21if_eno110:45:281
283700399239,9cyclictest0-21swapper/010:50:220
283700399232,20cyclictest3051654-21apt-get09:50:240
283700399231,20cyclictest3013504-21ssh09:25:220
283700399229,8cyclictest0-21swapper/009:35:290
283700399228,9cyclictest0-21swapper/011:55:260
283700399228,9cyclictest0-21swapper/010:30:210
2837003992219,2cyclictest2889431-21gpgconf07:50:000
2837004992111,3cyclictest0-21swapper/110:40:231
283700399219,8cyclictest3291883-21kthreadcore12:25:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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