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2025-12-10 - 05:30
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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 50 highest latencies:
System rackeslot6.osadl.org (updated Wed Dec 10, 2025 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3415599910891,15cyclictest432063-21kworker/u8:0+flush-179:000:20:001
3415599910093,6cyclictest380550-21kworker/u8:0+flush-179:021:20:001
341559999281,8cyclictest401441-21/usr/sbin/munin22:15:231
341559998983,4cyclictest417632-21kworker/u8:0+flush-179:023:05:251
341559998781,4cyclictest406278-21kworker/u8:1+flush-179:023:30:001
341558998679,4cyclictest427188-21kworker/u8:2+flush-179:023:55:000
341559998580,3cyclictest351573-21kworker/u8:1+events_unbound20:20:241
341559998277,4cyclictest406278-21kworker/u8:1+events_unbound22:40:231
341558998274,6cyclictest432063-21kworker/u8:0+events_unbound00:30:240
341559998175,4cyclictest393791-21kworker/u8:2+flush-179:022:25:011
341559998175,4cyclictest367806-21kworker/u8:3+events_unbound20:39:591
341559998073,5cyclictest385328-21kworker/u8:3+events_unbound21:25:281
341559998072,6cyclictest401248-21kworker/u8:3+events_unbound22:30:221
341559998072,6cyclictest401248-21kworker/u8:3+events_unbound22:30:221
341559998072,6cyclictest348397-21kworker/u8:0+events_unbound19:55:011
341558998070,6cyclictest380550-21kworker/u8:0+events_unbound21:15:250
341558997973,4cyclictest427188-21kworker/u8:2+flush-179:023:35:000
341559997870,6cyclictest379161-21/usr/sbin/munin21:05:241
341559997865,11cyclictest341529-21kworker/u8:2+flush-179:019:20:161
341559997771,5cyclictest432063-21kworker/u8:0+flush-179:000:04:001
341559997771,5cyclictest406278-21kworker/u8:1+events_unbound22:45:241
341558997768,7cyclictest415789-21latency_hist23:00:010
341559997671,4cyclictest351573-21kworker/u8:1+flush-179:020:10:281
341559997668,6cyclictest371003-21kworker/u8:0+flush-179:020:50:011
341558997564,9cyclictest430405-21apt-get23:44:400
341559997467,5cyclictest414233-21kworker/u8:3+events_unbound23:00:031
341559997369,3cyclictest371003-21kworker/u8:0+events_unbound20:40:241
341559997368,4cyclictest390042-21kworker/u8:1+events_unbound21:40:231
341559997366,6cyclictest374378-21kworker/u8:2+flush-179:021:00:001
341559997266,5cyclictest359595-21kworker/u8:2+flush-179:020:10:001
341559997266,4cyclictest406278-21kworker/u8:1+events_unbound22:50:241
341559997264,5cyclictest438637-21cat00:10:001
341558997263,6cyclictest443239-21latency_hist00:25:010
341559997165,5cyclictest414233-21kworker/u8:3+flush-179:023:25:001
341559997165,4cyclictest414233-21kworker/u8:3+flush-179:023:45:221
341559997164,5cyclictest396772-21kworker/u8:1+flush-179:022:05:011
341559997065,4cyclictest406278-21kworker/u8:1+events_unbound23:00:011
341559997064,4cyclictest436828-21kworker/u8:1+events_unbound00:25:171
341559997063,5cyclictest406278-21kworker/u8:1+flush-179:023:15:011
341558997063,5cyclictest374378-21kworker/u8:2+flush-179:020:55:190
341559996964,4cyclictest436828-21kworker/u8:1+flush-179:000:10:161
341558996962,5cyclictest374378-21kworker/u8:2+events_unbound21:10:000
341558996962,5cyclictest348397-21kworker/u8:0+events_unbound19:35:000
341558996958,9cyclictest271-21systemd-journal00:04:110
341558996859,7cyclictest351573-21kworker/u8:1+events_unbound19:50:010
341558996763,3cyclictest341529-21kworker/u8:2+events_unbound19:15:260
341558996761,5cyclictest348397-21kworker/u8:0+flush-179:019:40:010
341559996661,3cyclictest345012-21kworker/u8:3+flush-179:019:35:241
341559996660,5cyclictest375762-21kworker/u8:3+flush-179:021:00:241
341559996660,4cyclictest436828-21kworker/u8:1+flush-179:000:30:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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