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2025-12-15 - 06:24
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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 Mon Dec 15, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2863597998480,3cyclictest2876255-21kworker/u8:3+events_unbound20:15:250
2863597997975,3cyclictest2955222-21kworker/u8:0+events_unbound00:10:250
2863597997975,3cyclictest2896652-21kworker/u8:2+events_unbound20:55:240
2863597997971,3cyclictest2946833-21kworker/u8:0+events_unbound23:35:250
2863597997470,3cyclictest2866639-21kworker/u8:1+events_unbound19:45:260
2863600997364,6cyclictest2879674-21latency_hist20:00:021
2863600997263,7cyclictest2873048-21latency_hist19:40:021
2863597997265,6cyclictest2966017-21kworker/u8:3+events_unbound00:35:300
2863597997263,4cyclictest2956457-21kworker/u8:2+events_unbound00:05:220
2863597997166,4cyclictest2911559-21kworker/u8:2+events_unbound22:05:400
2863597997062,3cyclictest2955222-21kworker/u8:0+events_unbound00:04:010
2863597996956,9cyclictest2956429-40mandb00:00:010
2863600996860,6cyclictest2951631-21kworker/u8:3+flush-179:000:00:011
2863597996864,3cyclictest2876255-21kworker/u8:3+events_unbound20:10:250
2863600996557,6cyclictest2963101-21apt-get00:20:031
2863600996555,7cyclictest2876457-21/usr/sbin/munin19:50:221
2863597996560,4cyclictest2963173-21kworker/u8:2+events_unbound00:25:140
2863597996556,7cyclictest2877816-21apt-get19:54:590
2863597996456,6cyclictest2881243-21kworker/u8:1+flush-179:020:40:000
2863600996358,4cyclictest2938881-21kworker/u8:3+flush-179:023:09:591
2863606996259,2cyclictest0-21swapper/319:56:593
2863597996251,5cyclictest2866639-21kworker/u8:1+events_unbound19:25:180
2863600996051,7cyclictest2873285-21/usr/sbin/munin19:40:241
2863600995954,4cyclictest2898743-21kworker/u8:1+flush-179:021:15:251
2863597995954,4cyclictest2866639-21kworker/u8:1+events_unbound19:35:220
2863606995852,4cyclictest2905145-21turbostat21:20:003
2863600995853,3cyclictest2881243-21kworker/u8:1+events_unbound20:50:201
2863597995851,5cyclictest2964986-21true00:25:000
2863597995849,3cyclictest2914730-21kworker/u8:3+events_unbound22:30:280
2863597995848,3cyclictest2951631-21kworker/u8:3+events_unbound23:45:230
2863600995748,7cyclictest2888174-21diskstats20:25:171
2863597995752,4cyclictest2949512-21kworker/u8:1+events_unbound23:40:210
2863600995648,6cyclictest2959909-21latency_hist00:10:001
2863597995652,3cyclictest2938687-21kworker/u8:1+flush-179:023:04:560
2863597995652,3cyclictest2938687-21kworker/u8:1+flush-179:023:04:560
2863597995651,4cyclictest2863510-21kworker/u8:3+events_unbound19:15:240
2863597995648,6cyclictest266-21systemd-journal21:01:320
2863597995547,6cyclictest2963101-21apt-get00:20:010
2863600995448,4cyclictest2963173-21kworker/u8:2+flush-179:000:25:161
2863600995448,4cyclictest2876255-21kworker/u8:3+flush-179:020:05:231
2863600995447,5cyclictest2930881-21latency_hist22:40:011
2863597995449,4cyclictest2946833-21kworker/u8:0+events_unbound23:27:320
2863600995345,5cyclictest2937238-21latency_hist23:00:021
2863597995349,3cyclictest2919771-21kworker/u8:1+events_unbound22:43:240
2863597995349,3cyclictest2914730-21kworker/u8:3+events_unbound22:10:220
2863597995341,9cyclictest266-21systemd-journal20:00:000
2863600995246,4cyclictest2905111-21kworker/u8:0+flush-179:021:25:011
2863600995245,4cyclictest2889255-21kworker/u8:3+events_unbound20:30:141
2863600995233,13cyclictest2892371-21kworker/u8:0+events_unbound20:40:251
2863597995248,3cyclictest2886302-21kworker/u8:0+events_unbound20:21:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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