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2023-12-04 - 11:04
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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: reduced 
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot8.osadl.org (updated Mon Dec 04, 2023 00:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
674607996055,4cyclictest958159-21kworker/u8:3+events_unbound00:13:093
674605995854,3cyclictest930347-21kworker/u8:2+flush-8:000:30:402
674600995650,4cyclictest674440-21kworker/u8:1+flush-8:019:15:020
674605995349,3cyclictest704320-21kworker/u8:3+flush-8:019:45:322
674605995248,3cyclictest770229-21kworker/u8:2+events_unbound23:00:322
674605995046,3cyclictest731841-21kworker/u8:1+events_unbound21:05:292
674605994946,2cyclictest770229-21kworker/u8:2+flush-8:022:30:342
674605994743,3cyclictest731841-21kworker/u8:1+events_unbound20:20:292
674605994542,2cyclictest930347-21kworker/u8:2+events_unbound00:13:112
674605994541,3cyclictest853021-21kworker/u8:0+flush-8:022:25:302
674602994542,2cyclictest930347-21kworker/u8:2+flush-8:023:55:011
674602994541,3cyclictest626750-21kworker/u8:0+flush-8:019:40:311
674607994439,3cyclictest674440-21kworker/u8:1+flush-8:019:30:003
674605994440,3cyclictest770229-21kworker/u8:2+flush-8:022:40:002
674605994440,3cyclictest626750-21kworker/u8:0+flush-8:020:15:012
674605994341,1cyclictest674440-21kworker/u8:1+events_unbound19:15:312
674605994340,2cyclictest930347-21kworker/u8:2+events_unbound00:25:212
674605994340,2cyclictest881118-21kworker/u8:0+flush-8:023:10:232
674602994339,3cyclictest704320-21kworker/u8:3+flush-8:019:35:331
674600994335,5cyclictest797478-21apt-get21:00:210
674605994239,2cyclictest881118-21kworker/u8:0+flush-8:023:25:242
674602994240,2cyclictest770229-21kworker/u8:2+flush-8:023:20:011
674602994240,2cyclictest770229-21kworker/u8:2+flush-8:023:20:001
674602994138,2cyclictest881118-21kworker/u8:0+flush-8:022:54:591
674607994035,3cyclictest704320-21kworker/u8:3+flush-8:019:55:313
674607994034,4cyclictest4170283-21systemd-journal21:15:003
674605994037,2cyclictest653076-21kworker/u8:2+events_unbound19:25:262
674605994035,3cyclictest958141-40mandb00:00:012
674605993936,2cyclictest964062-21kworker/u8:1+events_unbound00:15:232
674605993936,2cyclictest770229-21kworker/u8:2+flush-8:021:15:192
674605993936,2cyclictest704320-21kworker/u8:3+flush-8:020:00:342
674605993936,2cyclictest653076-21kworker/u8:2+events_unbound19:20:292
674600993934,3cyclictest813482-21kworker/u8:1+flush-8:022:00:010
674607993832,4cyclictest780917-21latency_hist20:45:003
674605993835,2cyclictest881118-21kworker/u8:0+events_unbound22:55:312
674605993834,3cyclictest770229-21kworker/u8:2+flush-8:023:20:332
674605993834,3cyclictest770229-21kworker/u8:2+flush-8:023:20:322
674605993834,3cyclictest770229-21kworker/u8:2+flush-8:022:44:592
674602993835,2cyclictest881118-21kworker/u8:0+flush-8:000:10:011
674602993834,3cyclictest770229-21kworker/u8:2+flush-8:022:30:011
674602993833,3cyclictest770229-21kworker/u8:2+flush-8:020:40:241
674600993831,4cyclictest881411-21apt-get22:40:240
674605993735,2cyclictest930347-21kworker/u8:2+events_unbound00:05:222
674605993734,2cyclictest881118-21kworker/u8:0+flush-8:023:15:412
674605993734,2cyclictest881118-21kworker/u8:0+flush-8:023:15:412
674605993734,2cyclictest770229-21kworker/u8:2+flush-8:022:50:212
674605993734,2cyclictest770229-21kworker/u8:2+flush-8:021:45:002
674605993734,2cyclictest731841-21kworker/u8:1+flush-8:020:30:292
674605993733,3cyclictest881118-21kworker/u8:0+flush-8:023:50:282
674602993733,3cyclictest930347-21kworker/u8:2+events_unbound00:30:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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