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2026-09-18 - 10:17
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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 792 highest latencies:
System rackdslot0.osadl.org (updated Fri Sep 18, 2026 00:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
712599220,4cyclictest0-21swapper/020:48:170
712799212,18cyclictest9275-21cron00:00:002
7127992116,3cyclictest31753-21proc_pri23:40:212
712599212,18cyclictest0-21swapper/000:00:300
712799209,10cyclictest0-21swapper/220:45:162
712799204,15cyclictest0-21swapper/223:30:132
712799200,18cyclictest0-21swapper/221:32:322
712799192,2cyclictest28348-21nfsd419:45:182
712799192,2cyclictest1622-21nfsd419:55:172
7126991917,1cyclictest0-21swapper/123:41:181
712699190,1cyclictest0-21swapper/122:30:211
712699190,1cyclictest0-21swapper/100:31:151
712599193,15cyclictest16329-21timerwakeupswit22:15:220
712599193,15cyclictest16329-21timerwakeupswit22:15:210
7125991917,1cyclictest0-21swapper/023:48:380
7125991916,2cyclictest23324-21cpuspeed_turbos22:30:170
712799183,1cyclictest0-21swapper/220:17:182
712799182,15cyclictest0-21swapper/222:10:192
7127991816,1cyclictest0-21swapper/223:25:222
7127991816,1cyclictest0-21swapper/221:24:292
7127991815,2cyclictest11912-21ntp_offset21:10:202
7127991815,2cyclictest0-21swapper/220:10:182
7127991814,3cyclictest30940-21sshd22:43:442
7127991814,3cyclictest30940-21sshd22:43:432
7127991814,3cyclictest0-21swapper/222:25:002
7127991814,2cyclictest11482-21nfsd419:15:182
712799181,16cyclictest26372-21/usr/sbin/munin00:30:142
712799181,16cyclictest23357-21find19:39:002
712799181,16cyclictest15854-21date23:15:002
712799181,16cyclictest0-21swapper/220:30:142
712799181,16cyclictest0-21swapper/220:30:132
712799180,17cyclictest6463-21pzem_energy22:55:212
712799180,17cyclictest5912-21nvmesmart_nvme021:00:202
712799180,17cyclictest25355-21ls00:25:222
712799180,17cyclictest25355-21ls00:25:212
712799180,17cyclictest0-21swapper/222:49:292
712699182,15cyclictest0-21swapper/119:10:471
7126991815,2cyclictest3976-21H222:10:211
7126991815,2cyclictest1696-21smartctl19:55:191
7126991814,3cyclictest0-21swapper/120:53:211
712699181,2cyclictest19424-21tune2fs21:25:131
712699181,16cyclictest18806-21mailstats22:20:211
712699180,3cyclictest12568-21sshd21:11:431
712699180,1cyclictest0-21swapper/121:20:211
712699180,1cyclictest0-21swapper/119:20:131
712699180,17cyclictest16798-21perf22:20:011
712699180,17cyclictest16798-21perf22:20:001
712699180,16cyclictest3983-21H222:10:211
712699180,16cyclictest1564-21cut20:55:131
712699180,15cyclictest3976-21H222:10:211
712599182,15cyclictest9-21ksoftirqd/019:10:420
7125991814,3cyclictest26586-21grep00:30:110
7125991814,3cyclictest14499-21snapd20:10:280
712599181,2cyclictest23431-21chrt21:30:330
712599181,2cyclictest0-21swapper/021:20:010
712599180,1cyclictest26430-21python319:45:010
7127991715,1cyclictest0-21swapper/223:20:152
7127991715,1cyclictest0-21swapper/220:25:162
7127991714,2cyclictest26236-21fschecks_time20:40:162
7127991714,2cyclictest2296-21expr22:50:152
7127991714,2cyclictest21438-21proc_pri22:25:182
7127991714,2cyclictest19587-21nfsd419:30:182
7127991714,2cyclictest19359-21fschecks_count21:25:142
7127991714,2cyclictest16723-21grep00:10:212
7127991714,2cyclictest1506-21if_enp1s023:45:142
7127991714,2cyclictest14701-21cpuspeed_turbos20:20:132
7127991714,2cyclictest13659-21netstat00:05:182
712799171,15cyclictest28-21ksoftirqd/219:10:132
712799171,15cyclictest0-21swapper/219:54:072
712799170,2cyclictest686-21anvil20:52:342
712799170,2cyclictest377-21grep21:50:122
712799170,2cyclictest377-21grep21:50:112
712799170,2cyclictest28549-21grep21:40:202
712799170,2cyclictest26429-21python319:45:002
712799170,1cyclictest3269-21switchtime20:55:212
712799170,16cyclictest7675-21/usr/sbin/munin23:00:182
712799170,16cyclictest4568-21nfsd420:00:182
712799170,16cyclictest3811-21expr21:55:152
712799170,16cyclictest31578-21switchtime21:45:222
712799170,16cyclictest29875-21perf23:40:012
712799170,16cyclictest29366-21grep00:35:132
712799170,16cyclictest24945-21timerwakeupswit22:30:262
712799170,16cyclictest24834-21cut21:35:132
712799170,16cyclictest22857-21tr20:35:152
712799170,16cyclictest16738-21sed19:25:182
712799170,16cyclictest13947-21fschecks_time21:15:152
712799170,16cyclictest11109-21fschecks_time23:05:142
712799170,16cyclictest10445-21http_loadtime00:00:172
712799170,16cyclictest1035-21thermald22:00:222
712799170,16cyclictest10041-21nfsd422:05:172
712799170,16cyclictest0-21swapper/200:20:152
7126991714,2cyclictest455-21plymouthd22:45:141
7126991714,2cyclictest25027-21sed20:39:011
7126991714,2cyclictest24958-21expr19:40:171
7126991714,2cyclictest20837-21cut19:35:011
7126991714,2cyclictest15641-21tr00:10:151
7126991714,2cyclictest15617-21idleruntime-cro21:20:001
7126991714,2cyclictest1348-21lxd22:08:521
7126991714,2cyclictest1079-21cups-browsed23:10:211
712699171,15cyclictest20125-21grep23:20:191
712699170,2cyclictest29417-21postgres23:36:341
712699170,2cyclictest24924-21sed21:35:151
712699170,2cyclictest18032-21date19:30:001
712699170,2cyclictest11717-21taskset00:00:591
712699170,1cyclictest3983-21H222:10:211
712699170,16cyclictest7802-21expr23:00:151
712699170,16cyclictest6930-21find23:55:031
712699170,16cyclictest6783-21chrt21:04:561
712699170,16cyclictest6716-21grep20:05:161
712699170,16cyclictest4099-21H222:10:211
712699170,16cyclictest4099-21H222:10:211
712699170,16cyclictest30577-21grep22:40:231
712699170,16cyclictest30577-21grep22:40:231
712699170,16cyclictest2451-21expr22:50:151
712699170,16cyclictest2157-21sed21:50:211
712699170,16cyclictest2157-21sed21:50:211
712699170,16cyclictest21483-21expr00:20:151
712699170,16cyclictest19523-21grep00:15:191
712699170,16cyclictest14496-21snapd21:40:271
712699170,16cyclictest12893-21munin-run23:10:001
712699170,16cyclictest11718-21/usr/sbin/munin22:10:111
712699170,16cyclictest0-21swapper/100:35:141
7125991714,2cyclictest9297-21sed21:05:220
7125991714,2cyclictest7764-21grep23:00:140
7125991714,2cyclictest6958-21/usr/sbin/munin23:55:160
7125991714,2cyclictest6074-21apt23:55:000
7125991714,2cyclictest5091-21tr22:55:140
7125991714,2cyclictest4563-21nfsd421:55:190
7125991714,2cyclictest26159-21fschecks_count20:40:160
7125991714,2cyclictest24178-21/usr/sbin/munin21:35:200
7125991714,2cyclictest21729-21fschecks_count19:35:150
7125991714,2cyclictest17198-21needreboot21:20:180
7125991714,2cyclictest13455-21expr19:20:140
7125991713,3cyclictest3989-21H222:10:210
7125991713,3cyclictest24127-21apt-config23:30:010
712599171,1cyclictest0-21swapper/021:46:060
712599171,15cyclictest3979-21H222:10:210
712599171,15cyclictest0-21swapper/000:27:220
712599171,15cyclictest0-21swapper/000:27:220
712599170,2cyclictest4099-21H222:10:210
712599170,2cyclictest3320-21grep22:50:180
712599170,2cyclictest26722-21apt-key19:45:010
712599170,2cyclictest19524-21nfsd400:15:180
712599170,2cyclictest1561-21grep20:55:120
712599170,2cyclictest1522-21lxd00:20:370
712599170,2cyclictest14505-21snapd20:05:270
712599170,2cyclictest12979-21expr00:05:150
712599170,16cyclictest896-21cat22:45:230
712599170,16cyclictest399-20systemd-journal23:08:590
712599170,16cyclictest3976-21H222:10:210
712599170,16cyclictest3976-21H222:10:210
712599170,16cyclictest31131-21cut20:50:130
712599170,16cyclictest29776-21fschecks_time00:35:150
712599170,16cyclictest29742-21sort22:40:180
712599170,16cyclictest29742-21sort22:40:180
712599170,16cyclictest28358-21sendmail-msp22:39:590
712599170,16cyclictest20630-21tune2fs22:25:130
712599170,16cyclictest2007-21systemd-journal20:15:480
712599170,16cyclictest1970-21sed21:50:210
712599170,16cyclictest1970-21sed21:50:210
712599170,16cyclictest19504-21fschecks_time23:20:140
712599170,16cyclictest18539-21awk22:20:190
712599170,16cyclictest1695-21nvmesmart_nvme019:55:190
712599170,16cyclictest14500-21snapd21:40:280
712599170,16cyclictest13209-21latency_hist21:15:000
712599170,16cyclictest0-21swapper/023:42:120
712599170,15cyclictest3981-21H222:10:210
7127991614,1cyclictest0-21swapper/200:15:142
712799160,2cyclictest6243-21expr20:05:152
712799160,15cyclictest7703-21cpuspeed_turbos21:05:132
712799160,15cyclictest6097-21dpkg23:55:002
712799160,15cyclictest3450-21gsd-color23:15:132
712799160,15cyclictest14656-21grep19:20:212
712799160,15cyclictest14420-21/usr/sbin/munin22:15:172
712799160,15cyclictest14420-21/usr/sbin/munin22:15:172
712799160,15cyclictest0-21swapper/222:35:242
7126991614,1cyclictest3450-21gsd-color20:30:241
7126991614,1cyclictest3450-21gsd-color20:30:231
7126991614,1cyclictest27331-21timerandwakeup20:40:231
7126991614,1cyclictest24441-21apt-key23:30:011
7126991614,1cyclictest0-21swapper/123:54:321
7126991614,1cyclictest0-21swapper/122:55:171
7126991614,1cyclictest0-21swapper/121:55:141
7126991614,1cyclictest0-21swapper/120:00:131
7126991614,1cyclictest0-21swapper/100:05:241
7126991613,2cyclictest686-21cpuspeed_turbos23:45:131
712699160,1cyclictest25818-21/usr/sbin/munin22:35:141
712699160,15cyclictest9184-21expr20:10:141
712699160,15cyclictest21999-21expr23:25:141
712699160,15cyclictest21324-21cpuspeed_turbos19:35:131
712699160,15cyclictest192882chrt20:27:151
712699160,15cyclictest0-21swapper/122:25:111
712699160,15cyclictest0-21swapper/122:00:191
712699160,15cyclictest0-21swapper/121:05:011
712699160,15cyclictest0-21swapper/120:45:121
712699160,15cyclictest0-21swapper/120:20:131
712699160,15cyclictest0-21swapper/120:15:141
712699160,15cyclictest0-21swapper/119:50:171
712699160,15cyclictest0-21swapper/119:48:021
7125991614,1cyclictest17292-21cpuspeed_turbos20:25:130
7125991614,1cyclictest14465-21apt-get20:20:120
7125991614,1cyclictest0-21swapper/023:35:170
7125991614,1cyclictest0-21swapper/022:05:130
7125991614,1cyclictest0-21swapper/019:30:120
7125991614,1cyclictest0-21swapper/019:25:120
712599160,1cyclictest6102-21basename21:00:220
712599160,1cyclictest0-21swapper/022:13:280
712599160,15cyclictest9-21ksoftirqd/020:35:200
712599160,15cyclictest6555-21expr22:00:140
712599160,15cyclictest30540-21fschecks_time19:50:140
712599160,15cyclictest0-21swapper/021:25:210
712599160,15cyclictest0-21swapper/020:00:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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