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2026-03-21 - 11:47
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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 Sat Mar 21, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
343162299115105,7cyclictest3493909-21latency_hist22:25:001
34316229911283,25cyclictest3524690-40mandb00:00:001
34316189910999,8cyclictest3473168-21latency_hist21:20:010
3431618999384,7cyclictest3445854-21latency_hist19:55:000
3431622999181,7cyclictest3513260-21latency_hist23:25:011
3431618998978,9cyclictest266-21systemd-journal00:05:000
3431622998774,9cyclictest3487545-21latency_hist22:05:001
3431618998783,2cyclictest3473219-21kworker/u8:0+events_unbound21:35:000
3431618998782,3cyclictest3499184-21/usr/sbin/munin22:40:210
3431622998576,7cyclictest3511668-21latency_hist23:20:021
3431622998575,7cyclictest3469986-21latency_hist21:10:001
3431622998372,9cyclictest3500770-21/usr/sbin/munin22:45:231
3431618998175,5cyclictest3463609-21kworker/u8:0+flush-179:020:49:550
3431622998069,8cyclictest266-21systemd-journal21:50:011
3431622997871,5cyclictest3458881-21kworker/u8:3+events_unbound21:00:011
3431618997772,4cyclictest3500520-21kworker/u8:1+events_unbound23:10:010
3431618997772,4cyclictest3500520-21kworker/u8:1+events_unbound23:10:010
3431618997770,5cyclictest3487590-21kworker/u8:1+events_unbound22:20:230
3431618997671,4cyclictest3516413-21kworker/u8:0+flush-179:023:40:240
3431618997670,5cyclictest3435183-21kworker/u8:2+events_unbound19:45:020
3431622997566,6cyclictest266-21systemd-journal20:51:381
3431622997565,7cyclictest3455672-21latency_hist20:25:011
3431618997568,5cyclictest3447499-21kworker/u8:2+flush-179:020:40:010
3431618997470,3cyclictest3441135-21kworker/u8:1+flush-179:019:50:010
3431618997468,4cyclictest3465192-21kworker/u8:1+flush-179:021:40:240
3431622997362,8cyclictest3458881-21kworker/u8:3+flush-179:021:15:211
3431618997367,5cyclictest3465192-21kworker/u8:1+flush-179:021:09:560
3431618997367,4cyclictest3441135-21kworker/u8:1+flush-179:020:00:000
3431618997362,9cyclictest266-21systemd-journal22:25:000
3431622997261,8cyclictest3473219-21kworker/u8:0+flush-179:021:35:231
3431618997164,4cyclictest3481174-21kworker/u8:3+flush-179:021:50:240
3431618997163,4cyclictest3506928-21kworker/u8:3+flush-179:023:10:180
3431622997051,17cyclictest266-21systemd-journal19:46:271
3431618997061,7cyclictest3471570-21latency_hist21:15:000
3431622996961,6cyclictest266-21systemd-journal21:57:381
3431618996964,4cyclictest3450611-21kworker/u8:0+flush-179:020:20:240
3431622996861,5cyclictest3490759-21kworker/u8:2+flush-179:022:35:231
3431618996862,5cyclictest3521728-21kworker/u8:1+flush-179:000:39:560
3431622996760,5cyclictest3447499-21kworker/u8:2+flush-179:020:35:001
3431622996744,5cyclictest3452218-21latency_hist20:15:021
3431618996762,4cyclictest3521728-21kworker/u8:1+flush-179:000:34:560
3431618996760,4cyclictest3506928-21kworker/u8:3+events_unbound23:30:140
3431622996657,6cyclictest3510064-21latency_hist23:15:001
3431618996658,5cyclictest3518345-21kworker/u8:2+flush-179:000:25:180
3431618996559,5cyclictest3516413-21kworker/u8:0+events_unbound23:40:010
3431618996555,7cyclictest3453820-21latency_hist20:20:010
4577091640,1ptp4l441ktimers/323:40:273
3431618996459,4cyclictest3506928-21kworker/u8:3+events_unbound23:25:230
3431618996459,4cyclictest3506928-21kworker/u8:3+events_unbound23:25:230
3431618996457,6cyclictest3447499-21kworker/u8:2+flush-179:020:05:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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