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2026-05-02 - 17:41
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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 100 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
1817599200,19cyclictest29547-21fschecks_time12:15:142
1817599200,19cyclictest29547-21fschecks_time12:15:142
1817599200,17cyclictest863-21avahi-daemon11:05:212
1816699203,16cyclictest0-21swapper/009:55:130
1816699203,16cyclictest0-21swapper/007:10:140
18166992017,2cyclictest31776-21expr08:30:150
18166992017,2cyclictest2668-21expr10:30:140
18166992017,2cyclictest23450-21timerandwakeup11:05:220
18166992017,2cyclictest112232chrt11:41:450
18166992016,3cyclictest0-21swapper/012:20:130
18166992016,3cyclictest0-21swapper/008:05:200
1816699201,18cyclictest0-21swapper/009:05:140
1817599192,16cyclictest0-21swapper/212:02:492
1817599190,4cyclictest4099-21H222:10:212
1817599190,16cyclictest4099-21H222:10:212
1817599190,16cyclictest3987-21H222:10:212
1817599190,16cyclictest3985-21H222:10:212
1817599190,15cyclictest0-21swapper/211:55:172
18172991914,2cyclictest4035-21H222:10:211
1817299190,16cyclictest3983-21H222:10:211
1816699193,2cyclictest0-21swapper/007:55:150
1816699193,16cyclictest0-21swapper/007:15:110
1816699193,15cyclictest0-21swapper/008:40:130
1816699192,2cyclictest0-21swapper/011:52:250
1816699192,2cyclictest0-21swapper/011:52:240
1816699192,16cyclictest0-21swapper/008:15:160
1816699192,16cyclictest0-21swapper/008:10:210
18166991916,2cyclictest4099-21H222:10:210
18166991916,2cyclictest4099-21H222:10:210
18166991916,2cyclictest3987-21H222:10:210
18166991916,2cyclictest0-21swapper/011:35:130
18166991916,2cyclictest0-21swapper/011:15:180
18166991915,3cyclictest0-21swapper/012:25:170
18166991915,3cyclictest0-21swapper/009:30:020
18166991914,3cyclictest0-21swapper/012:36:110
1816699191,17cyclictest0-21swapper/010:15:010
1816699191,17cyclictest0-21swapper/009:25:140
1816699191,17cyclictest0-21swapper/007:40:380
1817599182,2cyclictest15376-21timerwakeupswit10:50:212
1817599182,15cyclictest4442-21chrt12:27:122
1817599182,15cyclictest32026-21latency_hist09:30:022
1817599182,15cyclictest17438-21nfsd410:55:162
18175991816,1cyclictest3981-21H222:10:212
18175991816,1cyclictest0-21swapper/210:42:082
18175991814,3cyclictest14499-21snapd08:30:282
18175991814,3cyclictest0-21swapper/210:05:322
1817599180,2cyclictest3976-21H222:10:212
1817599180,2cyclictest3976-21H222:10:212
1817599180,17cyclictest0-21swapper/208:01:342
1817599180,16cyclictest28521-21taskset10:20:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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