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2025-11-27 - 10:43
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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 Thu Nov 27, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
180397699112101,9cyclictest271-21systemd-journal00:04:010
18039769910999,8cyclictest271-21systemd-journal23:40:000
18039789910696,8cyclictest271-21systemd-journal00:00:001
18039789910181,17cyclictest1836248-21kworker/u8:3+flush-179:021:00:001
1803978999085,4cyclictest1811835-21kworker/u8:3+flush-179:019:45:241
1803978999085,4cyclictest1811835-21kworker/u8:3+flush-179:019:45:231
1803976999080,6cyclictest1830133-21kworker/u8:1+flush-179:020:40:190
1803978998884,3cyclictest1830133-21kworker/u8:1+events_unbound21:50:231
1803978998883,4cyclictest1828540-21kworker/u8:3+events_unbound20:30:191
1803976998272,7cyclictest1805476-21latency_hist19:15:010
180397699810,4cyclictest723-21Xorg21:31:590
1803978998075,4cyclictest1872002-21kworker/u8:1+events_unbound22:50:271
1803976998065,11cyclictest1843157-21latency_hist21:20:000
1803976997968,8cyclictest1902080-21/usr/sbin/munin00:20:240
1803976997967,8cyclictest1813700-21latency_hist19:40:010
1803978997667,3cyclictest1865686-21kworker/u8:0+events_unbound22:40:191
1803976997666,7cyclictest1815304-21latency_hist19:45:020
1803978997469,4cyclictest1867369-21kworker/u8:3+events_unbound22:35:251
1803976997466,5cyclictest1865686-21kworker/u8:0+flush-179:022:40:000
1803978997256,14cyclictest1806142-21kworker/u8:0+flush-179:020:00:261
1803976997165,4cyclictest1845720-21kworker/u8:2+flush-179:022:05:010
1803978997065,4cyclictest1853900-21kworker/u8:3+flush-179:022:10:211
1803978996964,4cyclictest1836248-21kworker/u8:3+events_unbound21:10:201
1803978996863,4cyclictest1833650-21kworker/u8:2+flush-179:021:05:251
1803978996863,4cyclictest1830133-21kworker/u8:1+flush-179:021:00:211
1803978996863,4cyclictest1810801-21kworker/u8:2+events_unbound19:35:151
1803978996863,4cyclictest1803924-21kworker/u8:2+flush-179:019:19:561
1803978996761,4cyclictest1876085-21kworker/u8:3+events_unbound23:05:131
1803978996759,3cyclictest1900267-21kworker/u8:0+events_unbound00:25:251
1803978996662,3cyclictest1832001-21kworker/u8:0+flush-179:020:45:001
1803978996661,4cyclictest1845720-21kworker/u8:2+flush-179:021:34:551
1803978996660,4cyclictest1895365-21kworker/u8:2+events_unbound00:15:141
180397899660,2cyclictest723-21Xorg21:44:591
1803976996659,4cyclictest1900267-21kworker/u8:0+flush-179:000:35:160
1803976996659,4cyclictest1806142-21kworker/u8:0+flush-179:020:00:180
1803976996658,6cyclictest1893553-21apt-get23:54:590
1803976996658,5cyclictest1785142-21kworker/u8:1+events_unbound19:15:240
1803978996561,3cyclictest1880854-21kworker/u8:0+events_unbound23:50:271
1803978996556,3cyclictest1880854-21kworker/u8:0+events_unbound23:45:181
1803978996552,10cyclictest1862782-21latency_hist22:20:021
1803978996460,3cyclictest1861905-21kworker/u8:2+events_unbound22:30:231
1803978996459,4cyclictest1845720-21kworker/u8:2+events_unbound21:45:251
1803976996457,4cyclictest1830133-21kworker/u8:1+flush-179:021:35:200
1803978996358,4cyclictest1830133-21kworker/u8:1+events_unbound20:50:221
1803978996258,3cyclictest1876085-21kworker/u8:3+flush-179:023:10:251
1803978996258,3cyclictest1785142-21kworker/u8:1+events_unbound19:10:141
1803978996257,4cyclictest1811835-21kworker/u8:3+flush-179:020:10:281
1803978996253,3cyclictest1880854-21kworker/u8:0+events_unbound23:20:181
1803976996251,8cyclictest1880809-21latency_hist23:15:000
1803978996157,3cyclictest1811835-21kworker/u8:3+events_unbound19:40:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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