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2026-05-16 - 13:52
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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 Sat May 16, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31266159910392,7cyclictest3167395-21latency_hist21:15:001
31266139910090,7cyclictest3128092-21latency_hist19:15:010
3126615999885,11cyclictest3159475-21kworker/u8:3+flush-179:020:50:241
3126613999892,4cyclictest3159475-21kworker/u8:3+flush-179:021:00:010
3126615999583,8cyclictest3148026-21latency_hist20:15:021
3126615999485,6cyclictest3212763-21latency_hist23:35:011
3126613999488,4cyclictest3210228-21kworker/u8:1+flush-179:023:25:240
3126613999485,7cyclictest1213033-21systemd-journal22:00:000
3126613999386,5cyclictest3191322-21http22:30:000
3126613999080,7cyclictest3144835-21/usr/sbin/munin20:05:240
3126615998779,5cyclictest3134515-21latency_hist19:35:001
3126615998576,6cyclictest3156261-21latency_hist20:40:011
3126615998475,7cyclictest3158108-21apt-get20:45:101
3126615998469,12cyclictest3144356-21apt-get20:05:001
3126613998477,5cyclictest3191282-21kworker/u8:1+flush-179:023:10:150
3126613998373,8cyclictest3220793-21cupsd00:00:010
3126613998373,8cyclictest3220793-21cupsd00:00:010
3126613998274,6cyclictest3219133-21latency_hist23:55:010
3126613998271,8cyclictest1213033-21systemd-journal00:05:010
3126615998069,8cyclictest3207998-21apt-get23:20:111
3126613997870,6cyclictest3149892-21apt-get20:20:120
3126615997566,7cyclictest3137946-21/usr/sbin/munin19:45:231
3126615997566,7cyclictest3137946-21/usr/sbin/munin19:45:221
3126615997565,7cyclictest3139533-21/usr/sbin/munin19:50:241
3126615997465,6cyclictest1213033-21systemd-journal20:40:411
3126613997468,5cyclictest3228998-21kworker/u8:2+flush-179:000:29:560
3126615997364,6cyclictest3227419-21latency_hist00:20:011
3126615997262,8cyclictest3220721-40logrotate00:00:011
3126615997262,8cyclictest3220721-40logrotate00:00:011
3126613997165,4cyclictest3203624-21kworker/u8:0+flush-179:023:05:190
3126613997165,4cyclictest3139340-21kworker/u8:2+flush-179:019:55:240
3126613997162,6cyclictest1-21systemd22:40:000
3126615996959,8cyclictest3188353-21kworker/u8:0+flush-179:022:25:241
3126613996960,7cyclictest1213033-21systemd-journal22:04:550
3126613996862,4cyclictest3164268-21kworker/u8:2+flush-179:021:25:160
3126615996657,6cyclictest3184917-21latency_hist22:10:011
3126615996556,7cyclictest3130010-21apt-get19:20:121
3126613996556,6cyclictest3223975-21latency_hist00:10:020
3126613996556,6cyclictest3223975-21latency_hist00:10:010
3126613996553,9cyclictest3225692-21store00:15:010
3126615996455,6cyclictest1213033-21systemd-journal23:02:531
3126615996455,6cyclictest1213033-21systemd-journal23:02:531
3126615996454,8cyclictest3128328-21/usr/sbin/munin19:15:241
3126613996453,9cyclictest3195002-21apt-get22:40:120
3126613996453,9cyclictest3195002-21apt-get22:40:120
3126615996357,4cyclictest3221016-21kworker/u8:0+flush-179:000:10:241
3126615996351,7cyclictest3159475-21kworker/u8:3+flush-179:021:15:161
3126613996358,4cyclictest3114080-21kworker/u8:0+flush-179:019:19:550
3126613996356,5cyclictest3159475-21kworker/u8:3+flush-179:021:20:220
3126613996352,8cyclictest3142472-21apt-get20:00:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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