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2026-04-07 - 11:26
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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 Tue Apr 07, 2026 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2463499340,34cyclictest0-21swapper/221:10:152
2463499260,25cyclictest0-21swapper/219:50:012
2463499244,13cyclictest30074-21python319:20:002
2463499244,13cyclictest30074-21python319:20:002
2463499230,20cyclictest0-21swapper/222:41:042
24632992314,8cyclictest4593-21nvmesmart_nvme022:20:200
2463299230,17cyclictest0-21swapper/021:40:180
2463299230,16cyclictest8560-21ls23:25:170
2463399223,18cyclictest0-21swapper/121:20:011
2463399220,21cyclictest843-21systemd-network21:12:171
24632992215,6cyclictest0-21swapper/000:35:000
2463299220,1cyclictest0-21swapper/023:25:000
2463299220,1cyclictest0-21swapper/022:35:220
2463399212,16cyclictest0-21swapper/119:42:431
24632992115,5cyclictest32105-21nfsd419:20:180
24632992114,6cyclictest5799-21ls20:30:120
24632992114,6cyclictest16290-21chrt22:41:220
24632992112,4cyclictest0-21swapper/021:03:470
2463299211,15cyclictest0-21swapper/021:14:220
2463299210,2cyclictest25312-21expr19:10:120
2463299210,2cyclictest20002-21/usr/sbin/munin21:50:190
2463299210,2cyclictest1642-21expr19:25:130
2463299210,20cyclictest4089-21ls00:15:130
2463299210,20cyclictest23394-21chrt21:57:170
2463299210,20cyclictest23394-21chrt21:57:170
2463299210,20cyclictest0-21swapper/022:50:170
2463299210,20cyclictest0-21swapper/019:46:010
2463299210,20cyclictest0-21swapper/000:20:150
2463299210,1cyclictest107972chrt22:33:130
2463299210,16cyclictest31977-21chrt00:06:440
2463299210,16cyclictest18709-21latency_hist23:45:000
2463299210,15cyclictest0-21swapper/021:38:590
24634992015,4cyclictest12700-21pzem20:40:182
24634992013,6cyclictest0-21swapper/221:30:172
2463499200,20cyclictest0-21swapper/222:50:162
2463399205,0cyclictest0-21swapper/123:25:131
24633992020,0cyclictest0-21swapper/121:30:161
2463399200,19cyclictest399-20systemd-journal20:29:531
2463399200,17cyclictest0-21swapper/123:22:271
24632992015,4cyclictest0-21swapper/021:46:410
24632992014,5cyclictest27009-21cut00:00:000
24632992014,5cyclictest11229-21latency23:30:180
24632992014,5cyclictest1119-21sed22:15:160
24632992014,5cyclictest0-21swapper/023:15:010
24632992014,5cyclictest0-21swapper/023:15:000
24632992012,7cyclictest7789-21perl21:30:150
2463299201,15cyclictest455-21plymouthd22:45:200
2463299200,2cyclictest11091-21sed19:40:160
2463299200,1cyclictest0-21swapper/021:15:200
2463299200,1cyclictest0-21swapper/020:51:560
2463299200,1cyclictest0-21swapper/020:15:120
2463299200,1cyclictest0-21swapper/020:00:150
2463299200,1cyclictest0-21swapper/019:35:220
2463299200,19cyclictest27772-21strings20:10:170
2463299200,19cyclictest27772-21strings20:10:160
2463299200,19cyclictest0-21swapper/020:25:190
2463299200,19cyclictest0-21swapper/020:20:170
2463299200,19cyclictest0-21swapper/019:50:180
2463299200,16cyclictest5922-21find19:30:200
2463299200,15cyclictest9891-21sensors20:35:200
2463299200,15cyclictest566-21cpuspeed_turbos00:10:130
2463299200,15cyclictest19033-21cpu23:45:120
2463299200,15cyclictest0-21swapper/023:10:120
2463299200,15cyclictest0-21swapper/023:00:140
2463299200,15cyclictest0-21swapper/022:15:000
2463299200,14cyclictest0-21swapper/020:40:150
2463299200,0cyclictest0-21swapper/022:07:090
2463499192,2cyclictest16316-21cat00:35:192
24634991917,1cyclictest19875-21cat19:55:202
24634991917,1cyclictest0-21swapper/221:09:102
24634991916,2cyclictest6673-21latency_hist19:35:002
24634991916,2cyclictest348-21expr22:15:122
24634991915,3cyclictest0-21swapper/219:54:212
24634991915,3cyclictest0-21swapper/219:40:172
24634991914,1cyclictest0-21swapper/200:00:182
2463499190,0cyclictest0-21swapper/222:25:162
24633991915,3cyclictest0-21swapper/120:13:581
24633991915,3cyclictest0-21swapper/120:13:581
24632991914,4cyclictest0-21swapper/019:17:440
24632991914,4cyclictest0-21swapper/019:17:430
24632991913,5cyclictest18239-21grep19:55:130
24632991913,5cyclictest0-21swapper/022:55:150
24632991913,5cyclictest0-21swapper/000:35:130
2463299190,1cyclictest1526-21lxd20:58:500
2463299190,18cyclictest0-21swapper/023:50:200
2463299190,18cyclictest0-21swapper/000:03:370
2463299190,15cyclictest28033-21cpuspeed_turbos23:05:140
2463299190,15cyclictest15584-21sed23:38:590
2463299190,14cyclictest0-21swapper/022:28:020
2463499182,1cyclictest0-21swapper/220:55:132
2463499182,15cyclictest0-21swapper/221:20:162
24634991816,1cyclictest23060-21awk23:50:172
24634991815,2cyclictest19645-21cut22:50:012
24634991815,2cyclictest0-21swapper/220:05:142
24634991814,3cyclictest0-21swapper/220:27:052
2463499181,16cyclictest24025-21systemctl22:55:192
2463499180,3cyclictest1522-21lxd22:14:502
2463499180,2cyclictest29203-21nfsd423:05:182
2463499180,17cyclictest851-21python323:15:012
2463499180,17cyclictest6663-21cron19:39:552
2463499180,17cyclictest0-21swapper/220:10:132
2463499180,17cyclictest0-21swapper/220:10:122
2463399182,15cyclictest0-21swapper/121:45:161
2463399182,15cyclictest0-21swapper/120:55:131
24633991817,1cyclictest0-21swapper/120:31:431
24633991814,2cyclictest25529-21df_inode19:10:131
2463399180,17cyclictest26054-21sed20:09:011
2463399180,16cyclictest0-21swapper/122:45:171
24632991814,3cyclictest0-21swapper/021:05:120
24632991813,4cyclictest0-21swapper/020:05:140
2463299181,2cyclictest14045-21grep20:45:130
2463299180,1cyclictest1522-21lxd22:00:500
2463299180,17cyclictest0-21swapper/000:25:140
2463299180,15cyclictest0-21swapper/021:29:200
2463299180,0cyclictest0-21swapper/021:20:130
24634991715,1cyclictest0-21swapper/222:05:002
24634991715,1cyclictest0-21swapper/220:00:142
24634991714,2cyclictest9981-21cat00:25:152
24634991714,2cyclictest9034-21cstates22:30:152
24634991714,2cyclictest8638-21cstates20:35:132
24634991714,2cyclictest743-21missed_timers20:20:182
24634991714,2cyclictest5748-21ntpq21:25:192
24634991714,2cyclictest3976-21H222:10:212
24634991714,2cyclictest30438-21/usr/sbin/munin21:15:122
24634991714,2cyclictest30427-21expr00:05:132
24634991714,2cyclictest27446-21grep22:05:152
24634991714,2cyclictest26353-21smartctl19:10:192
24634991714,2cyclictest23820-21cat21:00:232
24634991714,2cyclictest21703-21expr21:55:152
24634991714,2cyclictest21703-21expr21:55:142
24634991714,2cyclictest20315-21awk23:45:162
24634991714,2cyclictest19134-21cstates21:50:132
24634991714,2cyclictest17246-21ntpq21:45:162
24634991714,2cyclictest0-21swapper/200:15:002
2463499171,15cyclictest12834-21cat00:30:152
2463499171,15cyclictest113392sleep222:35:072
2463499170,2cyclictest6810-21cstates00:20:132
2463499170,2cyclictest29523-21grep20:15:132
2463499170,2cyclictest16267-21apache_volume23:40:122
2463499170,2cyclictest10628-21cstates23:30:132
2463499170,16cyclictest5389-21fschecks_count23:20:132
2463499170,16cyclictest3450-21gsd-color23:25:142
2463499170,16cyclictest31658-21basename19:20:162
2463499170,16cyclictest25351-21cut23:00:132
2463499170,16cyclictest24937-21cstates23:55:142
2463499170,16cyclictest17847-21nfsd420:50:172
2463499170,16cyclictest1471-21gpgconf23:15:002
2463499170,16cyclictest1471-21gpgconf23:15:002
2463499170,16cyclictest14648-21pzem_energy21:40:222
2463499170,16cyclictest14196-21cat20:45:152
2463499170,16cyclictest13427-21sort23:35:132
2463499170,16cyclictest10529-21cstates21:35:102
2463499170,16cyclictest0-21swapper/219:25:342
24633991715,1cyclictest31269-21taskset20:15:231
24633991715,1cyclictest11431-21chrt00:29:431
24633991714,2cyclictest7518-21mailstats22:25:211
24633991714,2cyclictest25458-21taskset22:00:181
24633991714,2cyclictest16755-21snapd21:42:381
24633991714,2cyclictest1525-21lxd21:20:491
2463399170,2cyclictest649-21fschecks_time22:15:141
2463399170,2cyclictest21557-21latency_hist23:50:011
2463399170,2cyclictest17734-21proc_pri23:40:181
2463399170,2cyclictest16830-21snapd19:35:481
2463399170,2cyclictest1377-21lxd19:46:501
2463399170,2cyclictest11912-21switchtime23:30:221
2463399170,2cyclictest10434-21expr21:35:101
2463399170,17cyclictest0-21swapper/119:26:091
2463399170,16cyclictest32435-21grep23:10:191
2463399170,16cyclictest29936-21apache_volume00:05:121
2463399170,16cyclictest26719-21master23:59:351
2463399170,16cyclictest24051-21sendmail_mailtr22:55:201
2463399170,16cyclictest23660-21sendmail-msp22:00:011
2463399170,16cyclictest23660-21sendmail-msp22:00:001
2463399170,16cyclictest23006-21nfsd423:50:171
2463399170,16cyclictest1856-21systemd-udevd19:16:531
2463399170,16cyclictest1856-21systemd-udevd19:16:521
2463399170,16cyclictest16754-21snapd20:35:191
2463399170,16cyclictest16238-21switchtime00:35:201
2463399170,16cyclictest1-21systemd22:32:521
2463399170,16cyclictest1198-21fschecks_count00:10:141
24634991614,1cyclictest0-21swapper/222:20:142
2463499160,15cyclictest455-21plymouthd00:15:192
24633991614,1cyclictest15014-21sed20:45:181
24633991614,1cyclictest0-21swapper/123:05:111
24633991614,1cyclictest0-21swapper/122:20:151
24633991614,1cyclictest0-21swapper/120:00:151
24633991614,1cyclictest0-21swapper/119:55:211
24633991614,1cyclictest0-21swapper/119:50:191
24633991614,1cyclictest0-21swapper/100:15:361
24633991614,1cyclictest0-21swapper/100:00:181
24633991613,2cyclictest32718-21fschecks_count20:20:151
24633991613,2cyclictest30304-21fschecks_count22:10:161
24633991613,2cyclictest26455-21awk23:00:181
2463399160,2cyclictest14790-21expr22:40:121
2463399160,2cyclictest12477-21nfsd420:40:161
2463399160,1cyclictest0-21swapper/122:50:171
2463399160,1cyclictest0-21swapper/122:05:181
2463399160,1cyclictest0-21swapper/100:30:161
2463399160,15cyclictest20135-21sendmail_mailqu21:50:201
2463399160,15cyclictest16626-21apache_volume20:50:121
2463399160,15cyclictest0-21swapper/123:15:181
2463399160,15cyclictest0-21swapper/123:15:171
2463399160,15cyclictest0-21swapper/122:35:131
2463399160,15cyclictest0-21swapper/121:25:121
2463399160,15cyclictest0-21swapper/121:00:181
2463399160,15cyclictest0-21swapper/119:30:141
2463399160,15cyclictest0-21swapper/119:20:161
2463399160,15cyclictest0-21swapper/100:20:141
24633991514,1cyclictest0-21swapper/123:35:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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