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2025-11-26 - 18:26
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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 Nov 26, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4036709910291,8cyclictest448828-21latency_hist09:30:011
4036709910291,8cyclictest448828-21latency_hist09:30:011
403670998979,7cyclictest501883-21latency_hist12:15:011
403670998756,30cyclictest0-21swapper/109:18:591
403669998574,8cyclictest429720-21latency_hist08:30:010
403670998374,6cyclictest486493-21kworker/u8:0+flush-179:011:25:251
403669998368,11cyclictest450415-21latency_hist09:35:010
403669998071,7cyclictest447242-21latency_hist09:25:010
403669997968,8cyclictest503474-21latency_hist12:20:010
403670997569,5cyclictest489585-21kworker/u8:0+flush-179:011:55:011
403670997467,5cyclictest401526-21kworker/u8:1+flush-179:007:10:181
403669997265,5cyclictest1-21systemd07:25:000
403670997163,6cyclictest476385-21/usr/sbin/munin10:55:231
403670997161,7cyclictest424679-21latency_hist08:15:011
403669997065,3cyclictest471425-21kworker/u8:3+flush-179:010:50:190
403671996736,2cyclictest0-21swapper/209:18:582
403670996758,7cyclictest453871-21latency_hist09:45:011
403670996754,9cyclictest421255-21apt-get08:05:001
403670996754,9cyclictest421255-21apt-get08:05:001
403670996655,8cyclictest473233-21apt-get10:45:121
403669996656,7cyclictest472976-21latency_hist10:45:010
403670996559,4cyclictest445618-21kworker/u8:1+flush-179:009:45:261
403669996556,7cyclictest498745-21kworker/u8:1+flush-179:012:10:000
403669996454,7cyclictest479581-21/usr/sbin/munin11:05:230
403669996354,6cyclictest501869-21kworker/u8:0+events_unbound12:30:230
403669996339,21cyclictest271-21systemd-journal11:37:480
403670996236,22cyclictest271-21systemd-journal12:39:481
403670996053,5cyclictest419692-21kworker/u8:0+events_unbound09:00:011
403670996050,7cyclictest485712-21latency_hist11:25:011
403670996045,11cyclictest271-21systemd-journal08:25:011
403674995957,1cyclictest0-21swapper/307:40:593
403670995948,8cyclictest479345-21latency_hist11:05:021
403670995948,8cyclictest403588-21latency_hist07:10:021
403670995852,4cyclictest489585-21kworker/u8:0+flush-179:011:40:231
403670995852,4cyclictest489585-21kworker/u8:0+flush-179:011:40:221
403670995839,15cyclictest440857-21kworker/u8:1+events_unbound09:05:181
403669995850,6cyclictest487312-21apt-get11:30:010
403669995848,7cyclictest426291-21latency_hist08:20:010
403669995833,22cyclictest414878-21latency_hist07:45:010
403669995749,5cyclictest452295-21latency_hist09:40:010
403670995650,5cyclictest445892-21/usr/sbin/munin09:20:221
403670995646,6cyclictest461867-21kworker/u8:3+flush-179:010:25:221
403670995547,5cyclictest402134-21kworker/u8:2+events_unbound07:20:011
403670995547,5cyclictest402134-21kworker/u8:2+events_unbound07:20:011
403670995543,9cyclictest465275-21apt-get10:20:131
403669995545,7cyclictest493927-21latency_hist11:50:000
403670995447,6cyclictest471425-21kworker/u8:3+flush-179:010:55:001
403670995447,5cyclictest408462-21kworker/u8:1+flush-179:007:40:241
403670995447,4cyclictest402134-21kworker/u8:2+flush-179:007:50:141
403669995432,20cyclictest458651-21awk10:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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