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2025-12-19 - 04:10
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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 Dec 19, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1636871998980,7cyclictest266-21systemd-journal00:04:001
1636870998878,7cyclictest1657727-21latency_hist20:15:000
1636871998672,10cyclictest1672593-21latency_hist21:00:021
1636871998672,10cyclictest1672593-21latency_hist21:00:011
1636870998480,3cyclictest1630942-21kworker/u8:0+flush-179:019:20:220
1636870998377,4cyclictest1636749-21latency_hist19:10:020
1636871997969,7cyclictest1706545-21latency_hist22:45:001
1636870997969,8cyclictest1690591-21/usr/sbin/munin21:55:230
1636870997967,6cyclictest1712318-21kworker/u8:2+events_unbound23:15:210
1636870997875,2cyclictest0-21swapper/023:13:590
1636870997769,6cyclictest1667470-21kworker/u8:0+flush-179:020:55:000
1636871997663,10cyclictest1722714-21latency_hist23:35:011
1636870997669,5cyclictest1712318-21kworker/u8:2+events_unbound00:00:010
1636870997262,7cyclictest1659307-21kworker/u8:2+events_unbound20:40:210
1636870997261,7cyclictest266-21systemd-journal21:05:010
1636870997167,3cyclictest1646306-21kworker/u8:1+flush-179:020:25:250
1636870997165,5cyclictest1721675-21kworker/u8:0+events_unbound23:45:200
1636870997065,4cyclictest1712318-21kworker/u8:2+flush-179:000:20:010
1636871996962,4cyclictest1659307-21kworker/u8:2+flush-179:020:25:131
1636870996964,4cyclictest1686962-21kworker/u8:3+flush-179:022:00:250
1636870996963,4cyclictest1683972-21kworker/u8:2+events_unbound22:15:020
1636870996863,4cyclictest1641590-21kworker/u8:2+flush-179:019:30:210
1636870996862,5cyclictest1646306-21kworker/u8:1+flush-179:020:45:260
1636870996861,6cyclictest1669433-21kworker/u8:3+flush-179:021:05:250
1636870996861,5cyclictest1669433-21kworker/u8:3+events_unbound21:25:140
1636871996759,6cyclictest1729339-21latency_hist23:55:011
1636871996758,6cyclictest1683972-21kworker/u8:2+flush-179:022:30:241
1636870996759,6cyclictest1734492-21latency_hist00:10:010
1636870996658,6cyclictest1646306-21kworker/u8:1+events_unbound20:30:200
1636871996559,3cyclictest0-21swapper/123:05:591
1636871996559,3cyclictest0-21swapper/123:05:591
1636871996558,5cyclictest1733147-21/usr/sbin/munin00:05:271
1636870996560,4cyclictest1701752-21kworker/u8:1+events_unbound22:35:220
1636870996559,5cyclictest1652442-21kworker/u8:0+events_unbound20:00:030
1636870996460,3cyclictest1706580-21kworker/u8:1+events_unbound22:50:250
1636870996454,8cyclictest1659334-21apt-get20:20:000
1636870996359,3cyclictest1737738-21kworker/u8:3+flush-179:000:25:240
1636870996358,4cyclictest1712318-21kworker/u8:2+events_unbound00:10:250
1636870996357,4cyclictest1693582-21kworker/u8:0+events_unbound22:10:140
1636870996357,4cyclictest1693582-21kworker/u8:0+events_unbound22:10:140
1636871996251,10cyclictest1652712-21apt-get20:00:011
1636870996257,4cyclictest1716579-21kworker/u8:1+events_unbound23:25:240
1636870996254,6cyclictest1701761-21latency_hist22:30:010
1636870996252,7cyclictest1650355-21kworker/u8:2+events_unbound19:55:190
1636871996151,8cyclictest1641538-21kworker/u8:1+flush-179:019:25:221
1636870996050,8cyclictest1654813-21apt-get20:05:120
1636877995956,2cyclictest0-21swapper/323:59:593
1636870995954,4cyclictest1646306-21kworker/u8:1+events_unbound19:50:170
1636870995953,4cyclictest1703349-21latency_hist22:35:010
1636876995856,1cyclictest0-21swapper/223:59:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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