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2025-10-14 - 06:14
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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 Oct 14, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157574099126119,4cyclictest1596817-21kworker/u8:3+events_unbound20:45:011
157573899114102,9cyclictest1578103-21kworker/u8:2+flush-179:019:30:170
15757389910794,10cyclictest1638176-21kworker/u8:1+flush-179:022:55:010
1575740999888,7cyclictest1577920-21apt-get19:15:131
1575740999482,9cyclictest1636850-21/usr/sbin/munin22:30:241
1575738999383,7cyclictest601706-21systemd-journal19:50:000
1575738999186,3cyclictest1665871-21kworker/u8:2+flush-179:000:04:000
1575738999182,7cyclictest1579531-21apt-get19:20:130
1575740998983,5cyclictest1665871-21kworker/u8:2+events_unbound00:04:011
1575740998673,11cyclictest1620462-21kworker/u8:2+flush-179:021:50:021
1575740998673,11cyclictest1620462-21kworker/u8:2+flush-179:021:50:011
1575740998579,4cyclictest1627097-21kworker/u8:2+flush-179:022:15:261
1575738998474,7cyclictest1575845-21cp19:10:020
1575738998473,9cyclictest1658092-21apt-get23:35:120
1575740998377,5cyclictest1596817-21kworker/u8:3+flush-179:020:35:001
1575740998377,4cyclictest1612776-21kworker/u8:0+flush-179:021:35:131
1575740998375,5cyclictest1617233-21latency_hist21:30:021
1575740998275,6cyclictest1592056-21kworker/u8:0+flush-179:020:10:011
1575740998271,8cyclictest1608735-21latency_hist21:00:011
1575740998170,8cyclictest1577418-21apt-get19:15:001
1575738998170,9cyclictest601706-21systemd-journal21:50:010
1575738998170,9cyclictest601706-21systemd-journal21:50:010
1575738998168,11cyclictest1623621-21apt-get21:50:030
1575740998073,5cyclictest1674091-21apt-get00:25:121
1575740998070,8cyclictest1603134-21kworker/u8:1+events_unbound21:05:021
1575740997865,10cyclictest1664208-21latency_hist23:55:011
1575738997868,8cyclictest1625690-21/usr/sbin/munin21:55:230
1575738997766,8cyclictest1636612-21latency_hist22:30:010
1575738997566,7cyclictest1605546-21apt-get20:45:080
1575740997466,6cyclictest1587492-21apt-get19:45:151
1575740997365,6cyclictest1578103-21kworker/u8:2+flush-179:019:30:241
1575740997266,4cyclictest1625104-21kworker/u8:0+flush-179:021:59:551
1575738997262,8cyclictest1677259-21/usr/sbin/munin00:35:250
1575738997262,8cyclictest1666014-21cat00:00:010
1575738997161,7cyclictest601706-21systemd-journal21:40:000
1575738997160,9cyclictest1659703-21apt-get23:40:120
1575738997160,6cyclictest1570629-21kworker/u8:0+events_unbound19:10:030
1575740997047,7cyclictest1646425-21latency_hist23:00:021
1575740996963,5cyclictest1638176-21kworker/u8:1+flush-179:023:09:551
1575738996858,8cyclictest1675659-21/usr/sbin/munin00:30:230
1575740996756,9cyclictest1624119-21apt-get21:50:141
1575740996653,10cyclictest1644570-21latency_hist22:55:011
1575738996558,5cyclictest1596817-21kworker/u8:3+flush-179:020:25:180
1575738996549,15cyclictest722-21Xorg22:38:580
1575740996456,6cyclictest1578103-21kworker/u8:2+flush-179:019:35:221
1575740996455,7cyclictest1654660-21latency_hist23:25:001
1575740996446,13cyclictest1665774-21kworker/u8:0+flush-179:000:35:141
1575738996458,5cyclictest1625429-21kworker/u8:3+flush-179:022:10:240
1575738996458,5cyclictest1625429-21kworker/u8:3+flush-179:022:10:230
1575738996357,4cyclictest1612776-21kworker/u8:0+flush-179:021:25:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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