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2025-12-22 - 04:30
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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 Mon Dec 22, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16872289910176,6cyclictest1790527-21latency_hist00:30:011
16872289910093,5cyclictest1774510-21kworker/u8:0+flush-179:000:00:011
1687227998983,3cyclictest1764960-21latency_hist23:10:000
1687227998780,5cyclictest1697131-21kworker/u8:1+flush-179:019:49:590
1687227998680,5cyclictest1708279-21kworker/u8:1+flush-179:020:20:240
1687227998478,4cyclictest1708279-21kworker/u8:1+events_unbound20:45:250
1687228998276,4cyclictest1708279-21kworker/u8:1+flush-179:020:35:271
1687227998069,8cyclictest1714854-21latency_hist20:35:020
1687228997872,4cyclictest1685542-21kworker/u8:1+flush-179:019:15:251
1687228997869,7cyclictest1748782-21/usr/sbin/munin22:20:231
1687227997872,4cyclictest1701899-21kworker/u8:3+events_unbound20:15:000
1687228997769,6cyclictest1766546-21latency_hist23:15:001
1687227997771,4cyclictest1774510-21kworker/u8:0+events_unbound00:04:020
1687227997770,6cyclictest1761550-21kworker/u8:1+events_unbound23:00:030
1687227997770,5cyclictest1774510-21kworker/u8:0+flush-179:000:05:250
1687227997767,8cyclictest1722806-21latency_hist21:00:020
1687227997667,7cyclictest266-21systemd-journal20:40:000
1687227997468,4cyclictest1711659-21kworker/u8:0+events_unbound22:05:240
1687227997367,5cyclictest1711659-21kworker/u8:0+flush-179:021:45:010
1687228997265,5cyclictest1708279-21kworker/u8:1+events_unbound20:25:231
1687227997266,5cyclictest1772901-21kworker/u8:3+events_unbound23:45:290
1687227997264,5cyclictest1701899-21kworker/u8:3+events_unbound19:55:010
1687227997167,3cyclictest1758371-21kworker/u8:2+events_unbound22:50:250
1687227997167,3cyclictest1711659-21kworker/u8:0+events_unbound21:35:280
1687227997064,5cyclictest1690466-21apt-get19:20:000
1687227997064,4cyclictest1769736-21kworker/u8:2+flush-179:023:25:200
1687227996961,5cyclictest1701324-21kworker/u8:0+flush-179:020:05:190
1687228996859,7cyclictest1761550-21kworker/u8:1+flush-179:023:20:001
1687227996759,6cyclictest1685542-21kworker/u8:1+events_unbound19:10:030
1687227996660,4cyclictest1774510-21kworker/u8:0+events_unbound00:10:220
1687228996559,4cyclictest1711659-21kworker/u8:0+events_unbound21:25:001
1687227996560,4cyclictest1722486-21kworker/u8:3+events_unbound21:10:010
1687227996558,5cyclictest1690436-21kworker/u8:0+flush-179:019:30:200
1687227996556,6cyclictest1748551-21latency_hist22:20:010
1687228996459,3cyclictest1690436-21kworker/u8:0+flush-179:019:20:271
1687228996458,4cyclictest1708468-21/usr/sbin/munin20:15:261
1687227996461,2cyclictest0-21swapper/023:13:590
1687227996458,4cyclictest1728111-21kworker/u8:2+flush-179:021:15:210
1687227996458,4cyclictest1728111-21kworker/u8:2+flush-179:021:15:200
1687228996362,1cyclictest0-21swapper/122:31:591
1687227996359,3cyclictest1754865-21kworker/u8:0+flush-179:022:45:250
1687227996357,4cyclictest1753267-21kworker/u8:3+flush-179:022:35:230
1687227996356,5cyclictest1790767-21/usr/sbin/munin00:30:250
1687227996355,6cyclictest1697131-21kworker/u8:1+flush-179:019:40:200
1687228996255,5cyclictest1761529-21latency_hist23:00:011
1687227996257,4cyclictest1743630-21kworker/u8:3+flush-179:022:05:010
1687227996156,4cyclictest1774510-21kworker/u8:0+events_unbound23:50:250
1687227996156,4cyclictest1774510-21kworker/u8:0+events_unbound23:50:250
168722799610,59cyclictest1769781-21munin-run23:25:010
1687228996053,4cyclictest1761226-21kworker/u8:0+flush-179:023:05:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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