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2026-08-27 - 13:11
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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 highest latencies:
System rackdslot0.osadl.org (updated Thu Aug 27, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10579992213,5cyclictest0-21swapper/121:10:161
1058599210,6cyclictest1663-21sendmail23:40:012
1058599200,15cyclictest0-21swapper/222:34:592
1058599192,2cyclictest13704-21chrt23:04:572
1058599190,3cyclictest31786-21python320:45:002
1058599190,16cyclictest0-21swapper/200:00:172
1058599190,16cyclictest0-21swapper/200:00:172
10579991917,1cyclictest0-21swapper/119:21:051
10579991913,5cyclictest426-21systemd-udevd21:04:521
1057499193,9cyclictest20301-21python320:25:010
1057499190,18cyclictest0-21swapper/020:25:170
10585991816,1cyclictest29672-21timerandwakeup19:40:292
1058599180,16cyclictest22387-21nfsd420:25:182
1057999182,15cyclictest19114-21nfsd420:20:201
10579991816,1cyclictest28741-21cat22:30:211
10579991816,1cyclictest12080-21latency_hist20:10:011
10579991815,2cyclictest7000-21cpuspeed_turbos20:00:111
10579991815,2cyclictest25028-21kernelversion22:25:171
10579991814,3cyclictest15014-21sshd22:05:591
1057999180,3cyclictest25728-21sshd20:30:371
1057499182,15cyclictest0-21swapper/023:28:290
10574991816,1cyclictest9-21ksoftirqd/023:10:200
10574991815,2cyclictest3992-21H222:10:210
10574991815,2cyclictest25324-21which00:20:160
10574991815,2cyclictest16538-21seq23:05:430
1057499180,16cyclictest2211-21nfsd419:50:190
10585991714,2cyclictest3043-21cpu20:50:142
10585991714,2cyclictest2933-21processes21:45:202
10585991714,2cyclictest24151-21cat00:19:552
10585991714,2cyclictest23534-21chrt22:23:002
10585991714,2cyclictest19722-21timerandwakeup20:20:242
10585991714,2cyclictest16205-21cpuspeed_turbos00:05:172
10585991714,2cyclictest1316-21cstates00:35:122
10585991714,2cyclictest1057-21cron22:00:002
10585991713,3cyclictest14501-21snapd22:35:312
1058599171,15cyclictest0-21swapper/220:45:202
1058599170,2cyclictest30308-21pzem_energy23:30:212
1058599170,2cyclictest20646-21if_eno121:20:162
1058599170,2cyclictest18100-21ls21:15:162
1058599170,2cyclictest16719-21if_enp1s022:10:152
1058599170,2cyclictest14795-21latency_hist20:15:002
1058599170,2cyclictest1348-21lxd23:28:372
1058599170,16cyclictest8341-21expr20:00:192
1058599170,16cyclictest5214-21head19:55:182
1058599170,16cyclictest3416-21qmgr21:37:422
1058599170,16cyclictest31267-21tune2fs19:45:152
1058599170,16cyclictest2969-21apache_processe22:45:082
1058599170,16cyclictest27239-21latency_hist00:25:012
1058599170,16cyclictest21723-21cut00:15:002
1058599170,16cyclictest17669-21munin-plugin-st20:20:022
1058599170,16cyclictest16098-21/usr/sbin/munin23:05:192
1058599170,16cyclictest0-21swapper/221:40:172
1058599170,16cyclictest0-21swapper/220:35:212
1058599170,16cyclictest0-21swapper/200:26:062
10579991715,1cyclictest5174-21apache_processe23:45:111
10579991715,1cyclictest29991-21chrt21:35:421
10579991715,1cyclictest10095-21chrt23:53:481
10579991714,2cyclictest8991-21ps21:55:191
10579991714,2cyclictest3576-21seq21:45:491
10579991714,2cyclictest3053-21systemd-logind19:26:521
10579991714,2cyclictest2069-21systemd-udevd23:58:521
10579991714,2cyclictest17438-21ls21:15:141
10579991714,2cyclictest17060-21timerwakeupswit20:15:201
10579991714,2cyclictest17050-21perf23:10:011
10579991714,2cyclictest1310-21expr00:35:121
10579991714,2cyclictest12101-21fschecks_count21:05:151
10579991714,2cyclictest0-21swapper/121:55:011
10579991713,3cyclictest426-21systemd-udevd22:16:511
10579991713,2cyclictest0-21swapper/123:30:181
1057999171,1cyclictest144532chrt20:11:391
1057999170,2cyclictest3707-21master22:37:471
1057999170,2cyclictest21187-21start-stop-daem00:11:561
1057999170,2cyclictest1141-21tr19:50:131
1057999170,2cyclictest1035-21thermald19:15:211
1057999170,16cyclictest655-21tune2fs22:40:121
1057999170,16cyclictest399-20systemd-journal21:33:531
1057999170,16cyclictest27991-21fschecks_time00:25:151
1057999170,16cyclictest27933-21timerwakeupswit23:25:201
1057999170,16cyclictest22603-21nfsd422:20:181
1057999170,16cyclictest21828-21awk23:15:211
1057999170,16cyclictest20765-21irqstats21:20:171
1057999170,16cyclictest2007-21systemd-journal20:35:401
1057999170,16cyclictest19773-21apt-get23:15:001
1057999170,16cyclictest0-21swapper/121:25:571
1057499172,1cyclictest0-21swapper/022:05:570
10574991715,1cyclictest0-21swapper/021:10:160
10574991715,1cyclictest0-21swapper/000:05:240
10574991714,2cyclictest9444-21cat20:05:000
10574991714,2cyclictest455-21plymouthd21:25:120
10574991714,2cyclictest31895-21nfsd419:45:190
10574991714,2cyclictest30399-21latency20:40:150
10574991714,2cyclictest28806-21cron20:39:000
10574991714,2cyclictest27849-21apt-get19:40:120
10574991714,2cyclictest26612-21nfsd421:30:210
10574991714,2cyclictest26406-21cron22:30:000
10574991714,2cyclictest20836-21sed00:10:200
10574991714,2cyclictest20027-21expr19:25:130
10574991714,2cyclictest18314-21nfsd421:15:170
10574991714,2cyclictest14902-21sed00:00:220
10574991714,2cyclictest14902-21sed00:00:220
10574991714,2cyclictest0-21swapper/021:55:170
1057499171,15cyclictest0-21swapper/022:35:200
1057499170,2cyclictest5414-21ntp_kernel_pll_19:55:200
1057499170,2cyclictest4397-21apt-config21:50:000
1057499170,2cyclictest3392-21cstates22:45:100
1057499170,2cyclictest3041-21egrep20:50:130
1057499170,2cyclictest29707-21/usr/sbin/munin23:30:170
1057499170,2cyclictest22216-21latency_hist21:25:010
1057499170,16cyclictest8190-21sendmail-mta20:58:430
1057499170,16cyclictest32393-21if_lxdbr023:35:150
1057499170,16cyclictest28768-21/usr/sbin/munin22:30:220
1057499170,16cyclictest22877-21chrt23:19:510
1057499170,16cyclictest13088-21fschecks_time20:10:150
1057499170,16cyclictest12611-21perf22:05:000
1057499170,16cyclictest11855-21expr20:09:000
1057499170,16cyclictest11668-21missed_timers23:55:170
1057499170,16cyclictest0-21swapper/021:40:140
1057499170,15cyclictest9999-21nfsd421:00:190
10585991614,1cyclictest0-21swapper/223:23:152
10585991614,1cyclictest0-21swapper/223:15:022
10585991614,1cyclictest0-21swapper/222:55:172
10585991614,1cyclictest0-21swapper/222:40:152
10585991614,1cyclictest0-21swapper/222:25:182
10585991614,1cyclictest0-21swapper/222:05:162
10585991614,1cyclictest0-21swapper/222:00:142
10585991614,1cyclictest0-21swapper/221:35:022
10585991614,1cyclictest0-21swapper/221:10:112
10585991614,1cyclictest0-21swapper/221:05:172
10585991614,1cyclictest0-21swapper/220:30:032
10585991614,1cyclictest0-21swapper/220:06:522
10585991614,1cyclictest0-21swapper/219:15:162
10585991614,1cyclictest0-21swapper/219:10:162
10585991614,1cyclictest0-21swapper/200:30:182
10585991613,2cyclictest9096-21nfsd423:50:192
10585991613,2cyclictest1522-21lxd19:34:502
10585991613,2cyclictest10280-21pzem_voltage21:00:202
1058599160,2cyclictest5953-21apt22:50:132
1058599160,2cyclictest186162chrt22:15:062
1058599160,1cyclictest20086-21df19:25:152
1058599160,1cyclictest0-21swapper/223:45:162
1058599160,15cyclictest80212sleep220:56:262
1058599160,15cyclictest4618-21rm21:50:002
1058599160,15cyclictest25661-21http_loadtime19:35:152
1058599160,15cyclictest24267-21sed21:25:222
1058599160,15cyclictest12179-21sendmail_mailst23:55:202
1058599160,15cyclictest0-21swapper/223:40:162
1058599160,15cyclictest0-21swapper/223:10:152
1058599160,15cyclictest0-21swapper/219:20:132
1057999162,11cyclictest22290-21cat19:30:151
10579991614,1cyclictest2952-21basename23:40:151
10579991614,1cyclictest0-21swapper/123:00:161
10579991614,1cyclictest0-21swapper/122:55:131
10579991614,1cyclictest0-21swapper/122:00:141
10579991614,1cyclictest0-21swapper/120:52:021
10579991614,1cyclictest0-21swapper/119:55:171
10579991614,1cyclictest0-21swapper/119:45:161
10579991613,2cyclictest625-21sendmail_mailqu23:35:201
10579991613,2cyclictest32444-21pzem_current21:40:191
10579991612,3cyclictest1521-21lxd19:38:501
10579991611,4cyclictest1551-21nfsd420:45:161
1057999160,2cyclictest23619-21date20:30:011
1057999160,2cyclictest1085-21gdbus00:15:191
1057999160,1cyclictest3599-21expr22:45:121
1057999160,15cyclictest30868-21expr00:30:111
1057999160,15cyclictest17450-21sed22:10:211
1057999160,15cyclictest16350-21cpuspeed_turbos00:05:161
1057999160,15cyclictest1035-21thermald20:40:201
1057999160,15cyclictest0-21swapper/123:20:141
1057999160,15cyclictest0-21swapper/122:55:021
1057999160,15cyclictest0-21swapper/119:40:231
1057999160,15cyclictest0-21swapper/100:20:151
10574991614,1cyclictest0-21swapper/022:55:140
10574991614,1cyclictest0-21swapper/000:15:130
10574991613,2cyclictest23951-21timerandwakeup19:30:220
1057499160,2cyclictest16280-21dpkg19:20:020
1057499160,1cyclictest32459-21dpkg20:45:020
1057499160,1cyclictest0-21swapper/019:10:120
1057499160,15cyclictest6248-21missed_timers23:45:180
1057499160,15cyclictest6055-21cpuspeed_turbos22:50:150
1057499160,15cyclictest4672-21gpgv21:50:000
1057499160,15cyclictest388-21cat22:40:110
1057499160,15cyclictest18842-21cpuspeed_turbos22:15:140
1057499160,15cyclictest17301-21expr19:20:130
1057499160,15cyclictest1577-21df00:35:130
1057499160,15cyclictest12197-21http_loadtime21:05:170
1057499160,15cyclictest0-21swapper/023:50:150
1057499160,15cyclictest0-21swapper/022:20:120
1057499160,15cyclictest0-21swapper/022:10:140
1057499160,15cyclictest0-21swapper/021:35:100
1057499160,15cyclictest0-21swapper/019:35:200
10585991513,1cyclictest0-21swapper/219:50:112
10579991515,0cyclictest0-21swapper/120:55:141
1057999150,1cyclictest0-21swapper/100:00:231
1057999150,1cyclictest0-21swapper/100:00:221
1057999150,14cyclictest0-21swapper/119:10:071
10574991513,1cyclictest0-21swapper/023:00:130
1057499150,1cyclictest2094-21/usr/sbin/munin23:40:130
1057499150,15cyclictest0-21swapper/000:30:010
1057499150,14cyclictest0-21swapper/020:15:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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