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2025-12-16 - 09:51
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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 Dec 16, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1507284998878,7cyclictest1520172-21kworker/u8:3+flush-179:020:00:011
1507284997162,7cyclictest1533430-21/usr/sbin/munin20:30:251
1507283997164,5cyclictest1544813-21kworker/u8:0+flush-179:021:05:000
1507283996862,4cyclictest1507209-21kworker/u8:3+flush-179:019:20:010
1507283996862,4cyclictest1507209-21kworker/u8:3+flush-179:019:20:000
1507283996857,9cyclictest1581978-21apt-get22:57:370
1507283996761,4cyclictest1520172-21kworker/u8:3+flush-179:019:50:000
1507284996657,6cyclictest1533189-21latency_hist20:30:021
1507283996660,4cyclictest1601885-21kworker/u8:1+flush-179:000:25:160
1507283996659,5cyclictest1562402-21kworker/u8:2+flush-179:023:30:250
1507283996559,4cyclictest1537896-21kworker/u8:3+flush-179:020:50:010
1507283996458,4cyclictest1537896-21kworker/u8:3+events_unbound20:40:240
1507283996456,6cyclictest1609946-21latency_hist00:25:010
1507283996356,5cyclictest1576642-21kworker/u8:1+flush-179:022:50:000
1507284996253,7cyclictest1557596-21latency_hist21:45:011
1507283996252,8cyclictest266-21systemd-journal19:33:090
1507284996149,10cyclictest1513822-21apt-get19:30:131
1507283996155,4cyclictest1562402-21kworker/u8:2+events_unbound22:20:000
1507283996154,5cyclictest1613126-21latency_hist00:35:010
1507283996154,5cyclictest1613126-21latency_hist00:35:000
1507283996154,5cyclictest1562402-21kworker/u8:2+flush-179:022:10:270
1507283996152,7cyclictest1585482-21latency_hist23:10:010
1507283996054,4cyclictest1562402-21kworker/u8:2+events_unbound23:45:150
1507284995951,6cyclictest1562402-21kworker/u8:2+events_unbound23:50:011
1507283995953,4cyclictest1562615-21/usr/sbin/munin22:00:250
1507283995953,4cyclictest1562402-21kworker/u8:2+events_unbound23:50:250
1507283995952,4cyclictest1523535-21kworker/u8:0+flush-179:020:00:150
1507284995848,7cyclictest1601909-21latency_hist00:00:011
1507283995849,7cyclictest1507209-21kworker/u8:3+flush-179:019:35:260
1507284995647,6cyclictest1561006-21/usr/sbin/munin21:55:231
1507284995551,3cyclictest0-21swapper/123:05:591
1507284995546,7cyclictest266-21systemd-journal21:35:001
1507284995530,23cyclictest1511979-21latency_hist19:25:001
150728399551,51cyclictest1-21systemd21:35:000
1507283995448,4cyclictest1601885-21kworker/u8:1+flush-179:000:00:250
1507283995445,7cyclictest1540112-21kworker/u8:1+events_unbound21:00:000
1507284995341,9cyclictest1521778-21latency_hist19:55:011
1507283995349,3cyclictest1540112-21kworker/u8:1+flush-179:021:40:270
1507283995347,4cyclictest1525107-21kworker/u8:1+events_unbound20:10:010
1507283995347,4cyclictest1525107-21kworker/u8:1+events_unbound20:10:000
1507286995249,2cyclictest0-21swapper/221:31:002
1507284995245,5cyclictest1601975-21kworker/u8:3+flush-179:000:04:001
1507283995247,3cyclictest1562402-21kworker/u8:2+flush-179:023:00:170
1507284995142,7cyclictest1564204-21/usr/sbin/munin22:05:241
1507283995145,4cyclictest1601975-21kworker/u8:3+events_unbound00:05:240
1507284995045,3cyclictest1594710-21kworker/u8:0+flush-179:023:39:101
1507284995042,6cyclictest1576642-21kworker/u8:1+flush-179:022:45:161
1507284995031,18cyclictest1510367-21cron19:20:011
1507284995031,18cyclictest1510367-21cron19:20:011
1507283995045,4cyclictest1544813-21kworker/u8:0+flush-179:021:50:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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