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2025-11-22 - 23:21
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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 Sat Nov 22, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1753129999978,17cyclictest1859436-21latency_hist12:40:010
1753132999689,5cyclictest1820698-21kworker/u8:0+events_unbound10:40:251
1753132999588,4cyclictest1737754-21kworker/u8:0+events_unbound07:35:251
1753129999583,9cyclictest1828678-21latency_hist11:05:010
1753129999583,9cyclictest1828678-21latency_hist11:05:000
1753132998878,7cyclictest1792050-21kworker/u8:1+flush-179:009:20:011
1753129998777,7cyclictest271-21systemd-journal09:00:000
1753132998477,5cyclictest1753057-21kworker/u8:3+events_unbound07:35:011
1753129998474,7cyclictest1773733-21latency_hist08:15:010
1753132997972,5cyclictest1831973-21kworker/u8:2+events_unbound11:20:251
1753132997869,7cyclictest1820698-21kworker/u8:0+flush-179:011:20:001
1753132997869,6cyclictest1819112-21kworker/u8:1+flush-179:010:35:011
1753129997842,34cyclictest723-21Xorg11:55:580
1753132997768,7cyclictest1827329-21/usr/sbin/munin11:00:251
1753132997768,7cyclictest1827329-21/usr/sbin/munin11:00:241
1753132997669,5cyclictest1783901-21kworker/u8:3+events_unbound09:10:231
1753129997670,4cyclictest1737754-21kworker/u8:0+flush-179:007:20:010
1753132997366,5cyclictest1788879-21kworker/u8:0+events_unbound09:05:001
1753132997267,3cyclictest1803206-21kworker/u8:0+events_unbound09:55:261
1753129997267,3cyclictest1831973-21kworker/u8:2+flush-179:011:25:260
1753132997164,6cyclictest1803206-21kworker/u8:0+flush-179:009:50:261
1753132997162,6cyclictest1851495-21kworker/u8:0+flush-179:012:25:151
1753132997065,3cyclictest1737754-21kworker/u8:0+events_unbound07:20:181
1753129997060,7cyclictest1801358-21apt-get09:39:590
1753129997059,8cyclictest1765788-21latency_hist07:50:010
1753132996857,7cyclictest1793404-21kworker/u8:2+flush-179:009:25:211
1753132996761,4cyclictest1840118-21kworker/u8:0+flush-179:011:45:261
1753132996760,4cyclictest1753057-21kworker/u8:3+flush-179:007:15:211
1753132996759,6cyclictest1820698-21kworker/u8:0+flush-179:010:50:281
1753132996759,6cyclictest1767605-21kworker/u8:1+flush-179:008:00:001
1753129996734,24cyclictest1768031-21fschecks_time07:55:170
1753132996656,7cyclictest1820698-21kworker/u8:0+events_unbound10:45:271
1753129996634,1cyclictest0-21swapper/012:22:590
1753132996560,4cyclictest1840118-21kworker/u8:0+flush-179:011:54:551
1753132996560,4cyclictest1840118-21kworker/u8:0+flush-179:011:54:551
1753132996555,8cyclictest1808236-21/usr/sbin/munin10:00:251
1753129996557,6cyclictest1753057-21kworker/u8:3+flush-179:007:45:000
1753132996454,8cyclictest1840118-21kworker/u8:0+flush-179:012:00:011
1753132996358,4cyclictest1849860-21kworker/u8:2+flush-179:012:30:261
1753132996355,5cyclictest1753057-21kworker/u8:3+events_unbound08:25:251
1753132996352,7cyclictest1793404-21kworker/u8:2+flush-179:009:20:211
1753132996352,7cyclictest1793404-21kworker/u8:2+flush-179:009:20:211
1753132996349,10cyclictest1773749-21apt-get08:15:001
1753132996256,4cyclictest1848011-21kworker/u8:1+flush-179:012:10:001
1753129996251,8cyclictest1851462-21latency_hist12:15:010
1753133996158,2cyclictest0-21swapper/207:14:582
1753132996154,5cyclictest1783901-21kworker/u8:3+flush-179:008:45:241
1753132996152,6cyclictest1759394-21latency_hist07:30:021
1753132996149,8cyclictest1780362-21latency_hist08:35:011
1753132996055,4cyclictest1753057-21kworker/u8:3+flush-179:008:20:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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