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2026-04-13 - 11:09
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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 Mon Apr 13, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2325899230,5cyclictest0-21swapper/223:44:022
2324599221,4cyclictest0-21swapper/021:55:010
23258992118,2cyclictest6193-21nfsd423:20:182
2325899210,5cyclictest0-21swapper/200:10:162
2324599210,17cyclictest13912-21nvmesmart_nvme021:40:190
2324599204,15cyclictest0-21swapper/022:39:280
23258991917,1cyclictest0-21swapper/220:56:392
23258991917,1cyclictest0-21swapper/220:30:192
23258991917,1cyclictest0-21swapper/219:20:212
2325199193,15cyclictest28204-21nfsd400:00:181
23251991917,1cyclictest0-21swapper/121:57:401
23251991916,2cyclictest1100-21snmpd19:10:221
23251991914,3cyclictest28976-21ls22:10:011
2324599192,16cyclictest26296-21egrep19:15:140
23245991917,1cyclictest0-21swapper/023:01:390
23245991915,3cyclictest3053-21systemd-logind23:18:520
23245991915,2cyclictest0-21swapper/021:00:150
2325899182,2cyclictest22786-21expr23:50:192
2325899182,15cyclictest4994-21cat21:25:162
23258991815,2cyclictest20963-21fschecks_count20:00:152
23258991814,3cyclictest0-21swapper/220:29:082
2325899180,16cyclictest399-20systemd-journal23:38:362
2325199182,15cyclictest10739-21timerandwakeup00:25:221
2325199182,15cyclictest0-21swapper/122:02:211
23251991816,1cyclictest0-21swapper/121:20:161
23251991814,3cyclictest993-21dbus-daemon22:40:221
23251991814,3cyclictest30277-21http23:10:011
23251991814,3cyclictest0-21swapper/120:31:391
23251991814,3cyclictest0-21swapper/119:59:271
2325199181,16cyclictest29702-21timerandwakeup21:10:201
2325199181,16cyclictest14742-21systemctl23:35:221
2325199181,16cyclictest10563-21vmstat19:40:211
2325199180,3cyclictest22130-21fschecks_count23:50:161
2325199180,17cyclictest32426-21nvmesmart_nvme023:10:191
2325199180,15cyclictest3981-21H222:10:211
2324599182,15cyclictest24823-21ntp_kernel_pll_22:00:170
23245991818,0cyclictest0-21swapper/022:20:360
23245991816,1cyclictest9-21ksoftirqd/019:28:220
23245991815,2cyclictest565-21nfsd422:15:160
23245991814,3cyclictest3053-21systemd-logind23:26:520
23245991814,3cyclictest0-21swapper/000:05:140
2324599181,2cyclictest11012-21chrt00:26:480
2324599180,16cyclictest399-20systemd-journal19:50:020
23258991715,1cyclictest112092chrt00:29:232
23258991715,1cyclictest0-21swapper/220:51:232
23258991715,1cyclictest0-21swapper/219:30:162
23258991714,2cyclictest5601-21lxd20:06:492
23258991714,2cyclictest31013-21expr21:15:152
23258991714,2cyclictest30659-21munin-run23:10:002
23258991714,2cyclictest28833-21timerwakeupswit00:00:212
23258991714,2cyclictest26577-21perf00:00:002
23258991714,2cyclictest25678-21fschecks_time23:00:152
23258991714,2cyclictest24768-21awk19:10:192
23258991714,2cyclictest24319-21python321:05:012
23258991714,2cyclictest16191-21sed21:45:172
23258991714,2cyclictest16191-21sed21:45:172
23258991714,2cyclictest15295-21cut22:40:182
23258991714,2cyclictest13651-21needreboot21:40:172
23258991714,2cyclictest12169-21sort23:30:212
23258991714,2cyclictest12169-21sort23:30:202
23258991714,2cyclictest11665-21/usr/sbin/munin00:30:202
23258991714,2cyclictest10935-21expr20:40:132
23258991714,2cyclictest1079-21cups-browsed00:20:222
2325899170,2cyclictest8942-21awk23:25:172
2325899170,2cyclictest8590-21sshd19:40:062
2325899170,2cyclictest7495-21sed22:25:212
2325899170,2cyclictest7314-21expr21:30:142
2325899170,2cyclictest4549-21sed00:15:152
2325899170,2cyclictest23589-21switchtime21:00:212
2325899170,2cyclictest2203-21which23:15:182
2325899170,2cyclictest20840-21nfsd422:50:202
2325899170,2cyclictest13364-21sessionclean22:38:592
2325899170,2cyclictest12671-21kernelversion19:45:192
2325899170,16cyclictest3989-21H222:10:212
2325899170,16cyclictest32299-21expr22:15:132
2325899170,16cyclictest30042-21sed22:10:172
2325899170,16cyclictest29134-21nfsd421:10:182
2325899170,16cyclictest26349-21cpuspeed_turbos22:05:132
2325899170,16cyclictest25957-21/usr/sbin/munin20:10:162
2325899170,16cyclictest20831-21chrt23:46:382
2325899170,16cyclictest10151-21lxd22:04:492
23251991714,2cyclictest9167-21pzem_current20:35:201
23251991714,2cyclictest24500-21ntpq20:05:191
23251991714,2cyclictest22222-21/usr/sbin/munin22:55:181
23251991714,2cyclictest16749-21snapd19:25:241
2325199170,2cyclictest4817-21postgres22:24:241
2325199170,2cyclictest25344-21missed_timers23:55:171
2325199170,16cyclictest985-21mailstats22:15:201
2325199170,16cyclictest8562-21munin-run00:24:591
2325199170,16cyclictest29737-21dpkg00:05:111
2325199170,16cyclictest25941-21/usr/sbin/munin21:05:171
2325199170,16cyclictest2466-21latency23:15:191
2325199170,16cyclictest17800-21timerandwakeup23:40:221
2325199170,16cyclictest13276-21apt-config20:45:021
2325199170,16cyclictest12401-21http_loadtime00:30:171
2325199170,16cyclictest10808-21nfsd421:35:181
2325199170,16cyclictest1079-21cups-browsed20:10:211
2325199170,16cyclictest1035-21thermald19:20:231
23245991716,0cyclictest0-21swapper/020:15:180
23245991715,1cyclictest0-21swapper/019:20:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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