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2026-09-17 - 21:58
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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 Thu Sep 17, 2026 12:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2181399241,5cyclictest201rcuc/112:19:571
21812992424,0cyclictest0-21swapper/010:12:100
2181399231,0cyclictest21-21ksoftirqd/111:14:111
21812992314,6cyclictest0-21swapper/009:25:050
2181299230,5cyclictest0-21swapper/007:19:530
21812992214,4cyclictest0-21swapper/011:30:310
21814992117,1cyclictest0-21swapper/207:50:002
21813992119,1cyclictest21-21ksoftirqd/108:25:021
21814992018,1cyclictest0-21swapper/211:01:092
2181399204,15cyclictest21-21ksoftirqd/110:25:001
21813992017,2cyclictest25901-21expr07:15:161
2181399201,18cyclictest201rcuc/110:46:101
2181399200,19cyclictest0-21swapper/107:55:121
2181499190,18cyclictest870-21systemd-logind11:18:522
2181399190,5cyclictest426-21systemd-udevd10:09:511
2181399190,5cyclictest426-21systemd-udevd10:09:511
2181399190,1cyclictest0-21swapper/110:17:441
2181399190,0cyclictest0-21swapper/109:40:421
2181299193,15cyclictest22719-21cat11:45:170
2181299191,16cyclictest0-21swapper/007:50:000
21814991816,1cyclictest6027-21latency10:20:162
21814991816,1cyclictest0-21swapper/207:54:552
2181499181,2cyclictest863-21avahi-daemon08:55:212
2181499181,2cyclictest12385-21cpuspeed_turbos08:45:132
2181499180,1cyclictest0-21swapper/211:55:002
2181499180,17cyclictest32654-21sd-executor10:12:352
2181499180,15cyclictest0-21swapper/208:25:002
2181399182,15cyclictest201rcuc/109:50:131
2181399182,15cyclictest0-21swapper/110:40:161
21813991816,1cyclictest21-21ksoftirqd/110:50:221
21813991816,1cyclictest21-21ksoftirqd/108:10:141
21813991815,2cyclictest29080-21nfsd411:00:161
21813991813,3cyclictest21-21ksoftirqd/112:01:351
2181399180,3cyclictest0-21swapper/111:58:181
2181399180,17cyclictest23489-21cron09:05:011
2181399180,17cyclictest0-21swapper/112:25:221
2181299182,1cyclictest144702chrt08:50:000
21812991816,1cyclictest0-21swapper/008:01:020
2181299181,2cyclictest2205-21expr10:15:140
21812991812,3cyclictest0-21swapper/010:05:170
21812991812,3cyclictest0-21swapper/010:05:160
2181299180,3cyclictest14506-21snapd08:05:280
21814991716,1cyclictest0-21swapper/209:42:362
21814991715,1cyclictest28-21ksoftirqd/210:37:242
21814991715,1cyclictest11010-21cut11:25:152
21814991714,2cyclictest31249-21idleruntime11:05:162
21814991714,2cyclictest2872-21systemd-logind12:36:522
21814991714,2cyclictest28284-21grep07:20:162
21814991714,2cyclictest24975-21cpuspeed_turbos07:15:122
21814991714,2cyclictest16743-21timerwakeupswit08:50:232
21814991714,2cyclictest15397-21fschecks_count12:30:132
21814991714,2cyclictest10740-21cstates10:30:152
2181499170,2cyclictest666-21df12:05:142
2181499170,2cyclictest4621-21pzem_power09:25:192
2181499170,2cyclictest3981-21H222:10:212
2181499170,2cyclictest3981-21H222:10:212
2181499170,2cyclictest22773-21fschecks_time07:10:142
2181499170,2cyclictest22115-21expr11:45:122
2181499170,2cyclictest20837-21python311:45:002
2181499170,2cyclictest2007-21systemd-journal08:41:312
2181499170,2cyclictest1522-21lxd09:02:432
2181499170,16cyclictest9694-21grep09:35:172
2181499170,16cyclictest7826-21switchtime12:15:232
2181499170,16cyclictest7402-21sendmail_mailtr09:30:192
2181499170,16cyclictest4502-21smartctl07:35:152
2181499170,16cyclictest399-20systemd-journal12:05:002
2181499170,16cyclictest3981-21H222:10:212
2181499170,16cyclictest3981-21H222:10:212
2181499170,16cyclictest3643-21latency_hist07:35:012
2181499170,16cyclictest28567-21pzem_voltage11:55:192
2181499170,16cyclictest24812-21munin-plugin-st10:05:002
2181499170,16cyclictest22846-21sed10:50:192
2181499170,16cyclictest2069-21systemd-udevd10:26:512
2181499170,16cyclictest15510-21nfsd409:45:182
2181499170,16cyclictest1521-21lxd11:12:442
2181499170,16cyclictest14550-21snapd08:05:282
2181499170,16cyclictest14500-21snapd12:20:272
2181399172,1cyclictest21-21ksoftirqd/111:10:001
21813991716,1cyclictest21-21ksoftirqd/111:20:011
21813991715,1cyclictest21-21ksoftirqd/108:15:151
21813991715,1cyclictest201rcuc/109:15:141
21813991714,2cyclictest7688-21systemctl08:35:221
21813991714,2cyclictest29560-21sendmail_mailst10:10:211
21813991714,2cyclictest15900-21cat11:35:121
21813991714,2cyclictest14894-21/usr/sbin/munin08:50:211
2181399171,2cyclictest21-21ksoftirqd/111:42:571
2181399171,15cyclictest21-21ksoftirqd/112:20:161
2181399171,15cyclictest21-21ksoftirqd/112:05:151
2181399171,15cyclictest21-21ksoftirqd/109:35:171
2181399171,15cyclictest21-21ksoftirqd/109:20:131
2181399171,15cyclictest21-21ksoftirqd/108:30:161
2181399171,15cyclictest21-21ksoftirqd/107:40:111
2181399171,15cyclictest21-21ksoftirqd/107:25:151
2181399171,15cyclictest201rcuc/108:55:121
2181399171,15cyclictest201rcuc/108:40:151
2181399171,15cyclictest0-21swapper/112:10:151
2181399171,15cyclictest0-21swapper/107:35:011
2181399170,2cyclictest24760-21gpg-connect-age10:55:011
2181399170,1cyclictest201rcuc/111:26:481
2181399170,1cyclictest0-21swapper/109:30:141
2181399170,16cyclictest5782-21runrttasks11:15:161
2181399170,16cyclictest5537-21cat07:35:211
2181399170,16cyclictest5422-21perf09:30:011
2181399170,16cyclictest24938-21latency_hist10:05:011
2181399170,16cyclictest21750-21sed09:00:171
2181399170,16cyclictest15618-21smtp10:39:081
2181399170,16cyclictest14080-21chrt07:50:181
2181399170,16cyclictest10256-21latency_hist10:30:001
2181399170,16cyclictest0-21swapper/111:55:001
21812991715,1cyclictest0-21swapper/008:15:160
21812991714,2cyclictest7389-21fschecks_time07:40:120
21812991714,2cyclictest629-21apt-get07:30:130
21812991714,2cyclictest29508-21cut12:00:000
21812991714,2cyclictest28437-21taskset09:11:300
21812991714,2cyclictest15892-21snapd09:00:110
21812991714,2cyclictest14500-21snapd11:40:110
21812991714,2cyclictest10584-21expr11:25:120
21812991713,3cyclictest8754-21sed12:20:000
2181299171,15cyclictest0-21swapper/009:43:460
2181299170,2cyclictest4814-21awk08:30:190
2181299170,2cyclictest30678-21tr11:05:140
2181299170,2cyclictest26156-21nfsd410:55:170
2181299170,2cyclictest24096-21apt-get10:55:000
2181299170,2cyclictest23749-21awk10:00:170
2181299170,2cyclictest16674-21cat10:40:130
2181299170,2cyclictest14550-21snapd12:20:270
2181299170,2cyclictest14180-21/usr/sbin/munin09:45:120
2181299170,1cyclictest0-21swapper/011:20:290
2181299170,1cyclictest0-21swapper/011:15:160
2181299170,16cyclictest9445-21dpkg08:40:130
2181299170,16cyclictest5540-21sed07:35:210
2181299170,16cyclictest3985-21H222:10:210
2181299170,16cyclictest3256-21apache208:57:030
2181299170,16cyclictest31151-21cat07:25:150
2181299170,16cyclictest30731-21/usr/sbin/munin08:20:220
2181299170,16cyclictest2318-21chrt08:26:220
2181299170,16cyclictest17247-21munin-run12:35:010
2181299170,16cyclictest0-21swapper/007:55:110
21814991614,1cyclictest16923-21apt-get09:50:122
21814991614,1cyclictest0-21swapper/210:45:172
21814991614,1cyclictest0-21swapper/210:40:122
21814991614,1cyclictest0-21swapper/208:15:172
21814991614,1cyclictest0-21swapper/208:15:002
21814991614,1cyclictest0-21swapper/207:55:132
21814991614,1cyclictest0-21swapper/207:40:202
21814991613,2cyclictest29437-21gpgv09:15:032
21814991613,2cyclictest13407-21ntpq12:25:182
2181499160,2cyclictest23788-21/usr/sbin/munin09:05:142
2181499160,1cyclictest32276-21/usr/sbin/munin09:20:142
2181499160,1cyclictest0-21swapper/211:30:132
2181499160,15cyclictest31738-21nvmesmart_nvme007:25:192
2181499160,15cyclictest26611-21expr09:10:132
2181499160,15cyclictest24711-21apt-config10:55:002
2181499160,15cyclictest16283-21idleruntime11:35:152
2181499160,15cyclictest0-21swapper/212:10:122
2181499160,15cyclictest0-21swapper/211:20:192
2181499160,15cyclictest0-21swapper/208:35:152
2181499160,15cyclictest0-21swapper/208:25:132
2181499160,15cyclictest0-21swapper/208:00:122
21813991615,1cyclictest201rcuc/109:45:161
21813991614,1cyclictest201rcuc/108:00:131
21813991614,1cyclictest0-21swapper/110:30:141
21813991614,1cyclictest0-21swapper/107:20:141
21813991613,2cyclictest18596-21wc12:35:171
21813991613,2cyclictest15465-21hddtemp_smartct12:30:131
21813991612,3cyclictest11733-21latency_hist07:50:011
2181399161,1cyclictest21-21ksoftirqd/109:58:001
2181399161,1cyclictest21-21ksoftirqd/108:06:461
2181399160,15cyclictest32419-21cnf-update-db08:25:011
2181399160,15cyclictest23132-21sendmail_mailqu11:45:191
2181399160,15cyclictest12240-21kworker/1:211:30:211
2181399160,15cyclictest0-21swapper/109:10:081
2181399160,15cyclictest0-21swapper/108:45:141
2181399160,15cyclictest0-21swapper/107:10:121
21812991614,1cyclictest8188-21cat10:25:120
21812991614,1cyclictest408-21expr12:05:140
21812991614,1cyclictest24699-21strings09:05:190
21812991614,1cyclictest0-21swapper/012:25:140
21812991614,1cyclictest0-21swapper/009:35:170
21812991614,1cyclictest0-21swapper/009:15:020
21812991614,1cyclictest0-21swapper/008:50:200
21812991614,1cyclictest0-21swapper/007:50:130
21812991614,1cyclictest0-21swapper/007:10:140
21812991613,2cyclictest32119-21munin-run12:05:000
2181299160,1cyclictest3317-21cpuspeed_turbos12:10:130
2181299160,1cyclictest0-21swapper/011:50:210
2181299160,1cyclictest0-21swapper/011:35:200
2181299160,1cyclictest0-21swapper/009:30:200
2181299160,15cyclictest3985-21H222:10:210
2181299160,15cyclictest20641-21sed10:45:220
2181299160,15cyclictest14932-21switchtime10:35:240
2181299160,15cyclictest0-21swapper/012:35:120
2181299160,15cyclictest0-21swapper/011:10:170
2181299160,15cyclictest0-21swapper/011:00:130
2181299160,15cyclictest0-21swapper/010:30:120
2181299160,15cyclictest0-21swapper/010:20:140
2181299160,15cyclictest0-21swapper/009:55:130
2181299160,15cyclictest0-21swapper/009:20:160
2181299160,15cyclictest0-21swapper/008:35:140
21814991514,1cyclictest0-21swapper/208:30:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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