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2026-04-28 - 14:20
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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 Tue Apr 28, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
362074399115106,7cyclictest3630446-21latency_hist19:40:010
362074599109101,5cyclictest3616145-21kworker/u8:0+flush-179:019:45:001
36207439910196,4cyclictest3637061-21kworker/u8:1+events_unbound20:25:000
36207459910088,9cyclictest1213033-21systemd-journal23:00:011
3620743999488,5cyclictest3637061-21kworker/u8:1+events_unbound20:55:010
3620743999184,5cyclictest3637061-21kworker/u8:1+flush-179:020:55:240
3620745999082,6cyclictest3636810-21latency_hist20:00:011
3620745999081,6cyclictest3712687-21latency_hist23:55:011
3620743999081,6cyclictest3672580-21kworker/u8:1+flush-179:021:55:210
3620745998779,6cyclictest3639999-21latency_hist20:10:011
3620743998779,6cyclictest3704479-21latency_hist23:30:020
3620743998779,6cyclictest3616145-21kworker/u8:0+flush-179:019:50:000
3620743998577,6cyclictest3698150-21unin-run23:10:010
3620745998373,7cyclictest3665742-21kworker/u8:3+flush-179:022:15:001
3620745998372,9cyclictest3681879-21apt-get22:15:431
3620743998375,5cyclictest3619154-21kworker/u8:2+flush-179:019:10:140
3620743998375,5cyclictest3619154-21kworker/u8:2+flush-179:019:10:140
3620743998068,5cyclictest3637061-21kworker/u8:1+events_unbound20:30:010
3620743997972,5cyclictest3706046-21kworker/u8:3+events_unbound23:40:140
3620745997867,8cyclictest3641582-21latency_hist20:15:011
3620743997872,5cyclictest3644962-21kworker/u8:3+flush-179:020:40:250
3620745997765,8cyclictest1213033-21systemd-journal21:59:421
3620743997768,7cyclictest3702891-21latency_hist23:25:020
3620745997665,9cyclictest3653242-21apt-get20:50:091
3620745997567,6cyclictest3709517-21latency_hist23:45:011
3620743997568,5cyclictest3672580-21kworker/u8:1+events_unbound22:25:220
3620743997562,10cyclictest1213033-21systemd-journal21:50:010
3620743997469,3cyclictest3641616-21kworker/u8:2+flush-179:020:20:010
3620743997467,5cyclictest3665742-21kworker/u8:3+flush-179:021:35:260
3620743997466,6cyclictest3616145-21kworker/u8:0+flush-179:019:25:250
3620743997465,6cyclictest3644962-21kworker/u8:3+flush-179:020:35:140
3620745997365,5cyclictest3665720-21latency_hist21:30:011
3620745997363,7cyclictest3637061-21kworker/u8:1+flush-179:021:10:011
3620743997365,6cyclictest3632049-21latency_hist19:45:010
3620743997364,6cyclictest3637061-21kworker/u8:1+flush-179:020:45:210
3620743997358,11cyclictest3714276-40logrotate00:00:000
3620745997263,6cyclictest3678709-21latency_hist22:10:011
3620745997255,15cyclictest3714553-21/usr/sbin/munin00:00:171
3620743997264,6cyclictest3672580-21kworker/u8:1+flush-179:022:35:180
3620745997163,6cyclictest3717527-21latency_hist00:10:011
3620745997061,7cyclictest3706065-21latency_hist23:35:001
3620745997058,10cyclictest3662515-21kworker/u8:2+flush-179:021:35:011
3620743997064,4cyclictest3637061-21kworker/u8:1+flush-179:020:30:240
3620743997057,9cyclictest3707655-21latency_hist23:40:000
3620743996965,3cyclictest3637061-21kworker/u8:1+flush-179:020:05:260
3620743996761,5cyclictest3619154-21kworker/u8:2+events_unbound19:15:250
3620743996761,4cyclictest3616145-21kworker/u8:0+flush-179:020:00:240
3620745996647,17cyclictest3707945-21apt-key23:40:021
3620743996660,4cyclictest3717764-21kworker/u8:3+events_unbound00:10:190
3620743996654,9cyclictest1213033-21systemd-journal00:20:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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