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2026-05-01 - 04:54
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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 Fri May 01, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35235899910692,11cyclictest3612596-21kworker/u8:0+flush-179:000:00:011
35235899910597,6cyclictest3580009-21latency_hist22:05:001
35235899910592,10cyclictest1213033-21systemd-journal00:30:001
35235899910393,7cyclictest3604390-21latency_hist23:20:001
3523587999385,5cyclictest3536877-21kworker/u8:0+events_unbound19:55:230
3523589999282,7cyclictest3605990-21latency_hist23:25:011
3523587999285,5cyclictest3564070-21kworker/u8:1+flush-179:022:05:240
3523587998979,8cyclictest3573831-21kworker/u8:2+events_unbound21:55:000
3523587998881,5cyclictest3562428-21kworker/u8:3+events_unbound21:25:010
3523589998674,9cyclictest3529847-21latency_hist19:30:011
3523587998682,3cyclictest3587997-21kworker/u8:2+flush-179:022:35:230
3523589998274,6cyclictest3584780-21latency_hist22:20:011
3523589998272,7cyclictest3599625-21latency_hist23:05:011
3523587998172,6cyclictest3599861-21kworker/u8:0+flush-179:023:10:000
3523587998072,6cyclictest3587997-21kworker/u8:2+flush-179:022:50:020
3523589997968,9cyclictest3561099-21/usr/sbin/munin21:05:241
3523587997968,8cyclictest3586362-21kworker/u8:3+flush-179:022:40:010
3523587997874,3cyclictest3564070-21kworker/u8:1+events_unbound22:00:010
3523587997872,5cyclictest3597991-21kworker/u8:1+events_unbound23:35:240
3523587997865,10cyclictest3616318-21apt-get23:55:000
3523587997767,7cyclictest3597991-21kworker/u8:1+flush-179:023:00:150
3523587997668,6cyclictest3536877-21kworker/u8:0+events_unbound20:05:250
3523587997661,4cyclictest3564070-21kworker/u8:1+events_unbound21:40:240
3523589997558,14cyclictest3607618-21kworker/u8:3+flush-179:023:35:171
3523587997568,5cyclictest3544956-21kworker/u8:0+events_unbound21:05:200
3523587997468,4cyclictest3621903-21kworker/u8:2+events_unbound00:30:260
3523587997467,4cyclictest3523508-21kworker/u8:3+events_unbound19:30:180
3523587997367,4cyclictest3523508-21kworker/u8:3+flush-179:019:40:150
3523589997261,8cyclictest3586918-21diskstats22:25:151
3523587997262,8cyclictest3610728-21kworker/u8:2+flush-179:023:50:010
3523587997262,7cyclictest3564070-21kworker/u8:1+events_unbound21:45:130
3523589997163,5cyclictest3554735-21/usr/sbin/munin20:45:221
3523587997162,7cyclictest3556062-21kworker/u8:1+flush-179:021:00:230
3523589997067,2cyclictest3612596-21kworker/u8:0+flush-179:000:04:021
3523587997064,5cyclictest3544956-21kworker/u8:0+flush-179:020:30:240
3523587997062,6cyclictest3571977-21kworker/u8:0+flush-179:022:00:200
3523589996960,7cyclictest3544956-21kworker/u8:0+flush-179:020:30:221
3523587996962,5cyclictest3606227-21kworker/u8:0+flush-179:023:30:160
3523587996962,4cyclictest3548113-21kworker/u8:2+flush-179:020:45:150
4577091680,41ptp4l61490irq/134-eno1-TxRx-019:05:023
3523589996860,6cyclictest3562686-21/usr/sbin/munin21:10:231
3523589996845,21cyclictest510-21rs:main1
3523587996865,2cyclictest0-21swapper/020:23:580
3523587996863,3cyclictest3621903-21kworker/u8:2+flush-179:000:35:210
3523587996859,6cyclictest3564070-21kworker/u8:1+flush-179:021:35:220
3523587996763,3cyclictest3548113-21kworker/u8:2+flush-179:020:35:220
3523589996655,9cyclictest3544676-21apt-get20:15:121
3523589996652,10cyclictest3540992-21latency_hist20:05:011
3523587996660,4cyclictest3612615-21latency_hist23:45:010
3523587996559,5cyclictest3582136-21kworker/u8:2+events_unbound22:10:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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