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2026-01-09 - 18:42
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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 Jan 09, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3519941999579,13cyclictest3526245-21apt-get07:30:001
3519941999484,7cyclictest3536121-21latency_hist08:00:001
3519939999484,8cyclictest3542495-21latency_hist08:20:010
3519939998881,5cyclictest3584415-21kworker/u8:2+flush-179:010:40:010
3519941998782,4cyclictest3556533-21kworker/u8:0+events_unbound09:05:241
3519941998366,9cyclictest3523300-21/usr/sbin/munin07:20:211
3519941997974,4cyclictest3540354-21kworker/u8:2+events_unbound08:25:221
3519941997867,8cyclictest3605318-21latency_hist11:35:011
3519939997768,7cyclictest3562094-21/usr/sbin/munin09:20:220
3519939997766,8cyclictest3624669-21latency_hist12:35:020
3519939997756,8cyclictest3568479-21apt-get09:40:110
3519939997756,8cyclictest3568479-21apt-get09:40:110
3519941997671,4cyclictest3516892-21kworker/u8:3+events_unbound07:36:561
3519941997664,6cyclictest3610128-21kworker/u8:2+events_unbound12:00:131
3519939997163,6cyclictest3619906-21latency_hist12:20:000
3519941997060,8cyclictest3597600-21kworker/u8:0+flush-179:011:40:011
3519939997062,6cyclictest3613271-21latency_hist12:00:010
3519941996964,4cyclictest3558698-21kworker/u8:3+events_unbound09:45:231
3519941996763,3cyclictest3529734-21kworker/u8:1+events_unbound08:00:171
3519941996661,4cyclictest3544383-21kworker/u8:3+events_unbound08:45:251
3519941996661,4cyclictest3529734-21kworker/u8:1+events_unbound07:50:251
351993999660,63cyclictest0-21swapper/009:31:590
4577091650,18ptp4l61490irq/134-eno1-TxRx-007:09:333
3519941996560,4cyclictest3584415-21kworker/u8:2+events_unbound10:40:261
3519941996560,4cyclictest3561818-21kworker/u8:0+events_unbound09:30:141
3519939996557,6cyclictest3534531-21latency_hist07:55:010
3519939996557,6cyclictest3523033-21kworker/u8:2+flush-179:007:35:250
3519941996459,4cyclictest3516892-21kworker/u8:3+events_unbound07:19:051
3519939996451,11cyclictest3594475-21diskstats11:00:150
3519941996359,3cyclictest3602190-21kworker/u8:3+events_unbound11:55:221
3519941996359,3cyclictest3561818-21kworker/u8:0+events_unbound09:22:541
3519941996358,4cyclictest3584415-21kworker/u8:2+events_unbound10:39:311
3519941996358,4cyclictest3579377-21kworker/u8:3+events_unbound10:55:251
3519941996353,8cyclictest3563681-21/usr/sbin/munin09:25:241
3519939996354,6cyclictest3571394-21latency_hist09:50:010
3519941996260,1cyclictest0-21swapper/108:24:591
3519939996252,7cyclictest3606920-21latency_hist11:40:000
3519941996156,4cyclictest3584415-21kworker/u8:2+events_unbound11:09:331
3519941996152,3cyclictest3579377-21kworker/u8:3+events_unbound10:20:141
3519941996110,49cyclictest3561611-21cat09:15:231
3519939996155,4cyclictest3531396-21kworker/u8:3+flush-179:007:45:190
3519939996154,4cyclictest3600561-21latency_hist11:20:010
3519941996056,3cyclictest3544331-21kworker/u8:1+events_unbound08:33:551
3519941996052,6cyclictest3532945-21latency_hist07:50:021
3519941995955,3cyclictest3614908-21kworker/u8:1+events_unbound12:19:361
3519941995955,3cyclictest3579377-21kworker/u8:3+events_unbound10:53:551
3519941995955,3cyclictest3515317-21kworker/u8:1+events_unbound07:14:561
3519941995954,4cyclictest3584415-21kworker/u8:2+events_unbound10:33:551
3519941995954,4cyclictest3563439-21kworker/u8:1+events_unbound09:41:561
3519941995954,4cyclictest3563439-21kworker/u8:1+events_unbound09:41:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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