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2025-12-09 - 10:52
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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 09, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17760689910993,14cyclictest1813052-21kworker/u8:0+flush-179:022:00:001
1776068999490,3cyclictest1795341-21kworker/u8:2+events_unbound20:10:241
1776065999489,4cyclictest1869563-21kworker/u8:0+events_unbound00:04:020
1776065999381,5cyclictest1829898-21kworker/u8:2+events_unbound22:05:010
1776065999285,5cyclictest1851608-21kworker/u8:3+events_unbound23:15:020
1776065999086,3cyclictest1821272-21kworker/u8:1+flush-179:021:40:250
1776065999084,5cyclictest1805087-21kworker/u8:1+events_unbound20:45:010
1776065998979,7cyclictest1869577-40logrotate00:00:010
1776068998879,3cyclictest1835684-21kworker/u8:1+events_unbound22:25:251
1776068998574,4cyclictest1808530-21kworker/u8:2+events_unbound20:55:301
1776065998479,4cyclictest1829898-21kworker/u8:2+events_unbound22:05:230
1776065998474,4cyclictest1808530-21kworker/u8:2+events_unbound21:10:010
1776065998373,5cyclictest1784146-21kworker/u8:3+events_unbound19:50:000
1776068998075,4cyclictest1869563-21kworker/u8:0+events_unbound00:20:271
1776068998075,4cyclictest1813052-21kworker/u8:0+flush-179:021:35:281
1776065998076,3cyclictest1848366-21kworker/u8:0+flush-179:022:55:000
1776068997870,3cyclictest1801651-21kworker/u8:0+events_unbound20:45:271
1776065997874,3cyclictest1801651-21kworker/u8:0+events_unbound20:35:240
1776065997873,4cyclictest1849953-21kworker/u8:1+flush-179:023:10:210
1776065997872,5cyclictest1841368-21kworker/u8:2+flush-179:023:25:260
1776065997667,7cyclictest1857108-21/usr/sbin/munin23:20:250
1776065997567,6cyclictest1843604-21latency_hist22:40:000
1776068997470,3cyclictest1815154-21kworker/u8:1+events_unbound21:10:271
1776068997469,4cyclictest1785736-21kworker/u8:1+events_unbound19:40:261
1776068997463,8cyclictest1832482-21latency_hist22:05:011
1776068997368,4cyclictest1869642-21kworker/u8:3+flush-179:000:15:281
1776068997364,4cyclictest1841368-21kworker/u8:2+events_unbound22:45:231
1776068997364,3cyclictest1841368-21kworker/u8:2+events_unbound23:20:171
1776065997368,4cyclictest1837298-21kworker/u8:0+events_unbound22:20:240
1776065997362,8cyclictest1809877-21latency_hist20:55:000
1776068997267,4cyclictest1866383-21kworker/u8:2+events_unbound23:55:221
1776068997266,5cyclictest1808530-21kworker/u8:2+flush-179:020:50:211
1776068997258,13cyclictest1849953-21kworker/u8:1+flush-179:023:15:011
1776069997067,2cyclictest0-21swapper/219:19:542
1776068997066,3cyclictest1851608-21kworker/u8:3+flush-179:023:15:281
1776068997060,8cyclictest1881023-21/usr/sbin/munin00:35:231
1776065997064,5cyclictest1808530-21kworker/u8:2+events_unbound20:55:280
1776065997064,4cyclictest1775418-21kworker/u8:0+events_unbound19:35:250
1776065997064,4cyclictest1758268-21kworker/u8:1+flush-179:019:25:170
1776065997059,8cyclictest1882394-21latency_hist00:40:020
1776068996964,4cyclictest1795341-21kworker/u8:2+flush-179:020:20:281
1776068996964,4cyclictest1775418-21kworker/u8:0+flush-179:019:30:201
1776068996960,4cyclictest1841368-21kworker/u8:2+events_unbound23:35:201
1776065996964,4cyclictest1802635-21kworker/u8:2+events_unbound20:30:200
1776068996863,4cyclictest1801651-21kworker/u8:0+flush-179:020:40:271
1776065996864,3cyclictest1841368-21kworker/u8:2+events_unbound23:35:240
177606599680,67cyclictest0-21swapper/000:12:580
1776068996763,3cyclictest1813052-21kworker/u8:0+flush-179:021:05:281
1776068996762,4cyclictest1872181-21kworker/u8:2+flush-179:000:10:281
1776068996762,4cyclictest1821272-21kworker/u8:1+events_unbound21:40:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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