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2026-05-02 - 23:39
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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
Characteristics of the 50 highest latencies:
System rackdslot0.osadl.org (updated Sat May 02, 2026 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1816699284,6cyclictest0-21swapper/011:23:550
18175992414,5cyclictest0-21swapper/211:15:202
1817599240,17cyclictest29329-21turbostat09:25:012
1817599230,16cyclictest0-21swapper/209:48:182
1816699236,3cyclictest7232-21/usr/sbin/munin09:40:140
1816699236,3cyclictest7232-21/usr/sbin/munin09:40:140
1816699236,2cyclictest24535-21awk12:05:180
1816699236,16cyclictest10092-21latency_hist08:50:000
18175992213,6cyclictest3986-21H222:10:212
1817299222,17cyclictest11517-21cron09:50:001
1816699225,2cyclictest31424-21sed12:20:000
1816699225,2cyclictest31424-21sed12:20:000
1816699225,16cyclictest27376-21expr09:20:140
1816699225,16cyclictest15976-21sed10:55:000
1816699224,17cyclictest18154-21/usr/sbin/munin10:00:150
1816699224,17cyclictest0-21swapper/010:39:340
18166992219,2cyclictest4088-21expr11:30:130
18166992219,2cyclictest3987-21H222:10:210
18166992219,2cyclictest29528-21cat07:30:020
18166992219,2cyclictest16985-21sort10:55:140
18166992219,2cyclictest16279-21cat09:00:140
18166992219,2cyclictest15175-21sendmail-mta08:56:170
18166992218,3cyclictest26797-21sed07:25:010
18166992218,3cyclictest2584-21cat08:35:160
18166992215,6cyclictest0-21swapper/012:14:320
1817599213,3cyclictest0-21swapper/211:50:482
1817599213,3cyclictest0-21swapper/211:50:482
1817599210,2cyclictest3985-21H222:10:212
1817599210,2cyclictest23031-21/usr/sbin/munin10:10:202
1816699215,15cyclictest0-21swapper/012:00:020
1816699215,14cyclictest0-21swapper/009:11:280
1816699214,3cyclictest7855-21ls07:45:210
1816699214,16cyclictest8494-21cat10:40:120
1816699214,16cyclictest31158-21apt-config10:25:000
1816699214,16cyclictest28427-21sed10:20:010
1816699214,16cyclictest25519-21tr11:10:160
1816699213,17cyclictest0-21swapper/009:50:240
1816699213,17cyclictest0-21swapper/007:35:010
18166992118,2cyclictest472-21cat07:35:150
18166992118,2cyclictest3989-21H222:10:210
18166992118,2cyclictest26559-21munin-run09:20:000
18166992118,2cyclictest26559-21munin-run09:20:000
18166992118,2cyclictest26429-21cut08:20:180
18166992118,2cyclictest1901-21/usr/sbin/munin11:25:180
18166992118,2cyclictest12237-21ps10:45:210
18166992118,2cyclictest0-21swapper/012:30:160
18166992118,2cyclictest0-21swapper/008:00:110
18166992117,3cyclictest32766-21missed_timers10:25:190
18166992116,5cyclictest0-21swapper/008:30:010
1817599200,2cyclictest4035-21H222:10:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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