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2026-09-05 - 14:27
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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 Sat Sep 05, 2026 00:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21689992516,9cyclictest0-21swapper/119:30:011
2168999240,19cyclictest0-21swapper/121:14:081
21687992415,0cyclictest0-21swapper/021:40:140
2169199230,5cyclictest0-21swapper/221:53:172
2169199230,18cyclictest0-21swapper/222:40:132
21691992212,1cyclictest0-21swapper/222:05:162
2168999200,15cyclictest0-21swapper/100:10:051
2168799203,16cyclictest0-21swapper/023:05:020
21687992018,1cyclictest0-21swapper/021:35:140
2169199192,2cyclictest15859-21timerwakeupswit20:50:222
21691991916,2cyclictest22211-21perf21:05:002
2169199190,1cyclictest0-21swapper/223:55:132
2169199190,18cyclictest7851-21sessionclean20:39:002
2169199190,16cyclictest24810-21fschecks_count00:00:132
2168999191,17cyclictest14589-21grep23:40:181
2168999190,18cyclictest870-21systemd-logind20:08:511
21687991914,4cyclictest0-21swapper/000:32:060
21687991914,4cyclictest0-21swapper/000:32:050
21691991816,1cyclictest0-21swapper/223:01:142
21691991815,2cyclictest7534-21expr21:35:132
21691991815,2cyclictest3058-21rs:main2
2169199181,2cyclictest0-21swapper/219:15:172
2169199181,16cyclictest3207-21JS22:10:212
2169199180,3cyclictest3414-21master21:57:272
2169199180,3cyclictest30540-21cron21:24:552
2169199180,17cyclictest843-21systemd-network23:07:352
2169199180,17cyclictest0-21swapper/223:10:132
2168999182,15cyclictest292882sleep122:13:081
2168999182,15cyclictest0-21swapper/123:51:141
2168999182,15cyclictest0-21swapper/123:00:001
21689991816,1cyclictest0-21swapper/123:21:271
21689991815,2cyclictest28683-21dpkg23:10:111
21689991815,2cyclictest11536-21netstat23:35:161
21689991814,3cyclictest17264-21cut23:45:171
2168999181,2cyclictest2872-21systemd-logind20:28:521
2168999180,16cyclictest0-21swapper/120:50:021
2168799182,1cyclictest28968-21http_loadtime21:15:140
21687991814,4cyclictest0-21swapper/020:26:100
21687991814,3cyclictest870-21systemd-logind22:28:510
2168799181,2cyclictest3053-21systemd-logind22:06:510
2168799181,2cyclictest30078-21smartctl23:10:190
2168799181,16cyclictest13409-21nfsd422:40:160
21687991810,4cyclictest0-21swapper/022:35:290
21691991715,1cyclictest0-21swapper/223:35:142
21691991715,1cyclictest0-21swapper/222:00:122
21691991715,1cyclictest0-21swapper/200:15:182
21691991715,0cyclictest0-21swapper/221:29:142
21691991714,2cyclictest5416-21grep00:20:212
21691991714,2cyclictest32549-21vmstat19:25:222
21691991714,2cyclictest31345-21nvmesmart_nvme000:10:202
21691991714,2cyclictest30331-21grep22:15:112
21691991714,2cyclictest28250-21cpu21:15:132
21691991714,2cyclictest18700-21/usr/sbin/munin23:50:102
21691991714,2cyclictest17184-21munin-plugin-st22:50:012
21691991714,2cyclictest13593-21ls23:40:132
21691991714,2cyclictest11671-21expr20:45:132
21691991714,2cyclictest10268-21latency_hist23:35:002
2169199170,2cyclictest4253-21ntpq20:30:162
2169199170,2cyclictest399-20systemd-journal20:05:002
2169199170,2cyclictest23014-21sed20:09:012
2169199170,2cyclictest17988-21if_err_lxdbr020:55:162
2169199170,2cyclictest1516-21lxd19:58:502
2169199170,1cyclictest0-21swapper/221:32:572
2169199170,16cyclictest970-21nfsd420:25:182
2169199170,16cyclictest7169-21fschecks_time22:30:172
2169199170,16cyclictest5360-21grep19:35:182
2169199170,16cyclictest31839-21wc20:25:012
2169199170,16cyclictest27782-21fschecks_count22:10:132
2169199170,16cyclictest27530-21fschecks_count00:05:142
2169199170,16cyclictest27530-21fschecks_count00:05:132
2169199170,16cyclictest2117-21cstates23:20:142
2169199170,16cyclictest1523-21lxd19:44:502
2169199170,16cyclictest13762-21expr19:50:182
2169199170,16cyclictest13762-21expr19:50:182
2169199170,16cyclictest1348-21lxd19:32:512
2169199170,16cyclictest10770-21systemctl22:35:192
2169199170,16cyclictest0-21swapper/223:15:172
2169199170,16cyclictest0-21swapper/220:40:132
21689991715,1cyclictest0-21swapper/122:39:301
21689991715,1cyclictest0-21swapper/121:30:031
21689991714,2cyclictest6126-21sed22:30:011
21689991714,2cyclictest5694-21if_eno123:25:171
21689991714,2cyclictest32664-21apache_processe00:15:131
21689991714,2cyclictest32032-21memory21:20:171
21689991714,2cyclictest30831-21nvmesmart_nvme020:20:181
21689991714,2cyclictest28870-21vmstat00:05:211
21689991714,2cyclictest28870-21vmstat00:05:211
21689991714,2cyclictest28613-21expr21:15:131
21689991714,2cyclictest28065-21ntp_states20:15:181
21689991714,2cyclictest28065-21ntp_states20:15:171
21689991714,2cyclictest24359-21expr00:00:131
21689991714,2cyclictest21076-21nfsd421:00:171
21689991714,2cyclictest20599-21cat21:55:201
21689991714,2cyclictest1856-21systemd-udevd20:58:521
21689991714,2cyclictest16243-21tr21:50:151
21689991714,2cyclictest1100-21snmpd22:30:201
21689991714,2cyclictest0-21swapper/100:27:581
21689991712,1cyclictest111rcu_preempt21:05:151
2168999171,15cyclictest0-21swapper/119:15:231
2168999170,2cyclictest3976-21H222:10:211
2168999170,2cyclictest3450-21gsd-color23:00:121
2168999170,2cyclictest2796-21chrt22:21:481
2168999170,2cyclictest26726-21awk22:10:011
2168999170,2cyclictest26226-21expr23:05:131
2168999170,2cyclictest22624-21grep19:10:111
2168999170,2cyclictest15430-21awk20:50:191
2168999170,2cyclictest14539-21munin-run22:45:001
2168999170,2cyclictest13855-21memory21:45:151
2168999170,16cyclictest8095-21uname21:35:171
2168999170,16cyclictest6964-21/usr/sbin/munin19:40:151
2168999170,16cyclictest5614-21apache_accesses20:35:101
2168999170,16cyclictest4055-21cpuspeed_turbos00:20:141
2168999170,16cyclictest31403-21apt-get23:15:101
2168999170,16cyclictest30838-21df22:15:121
2168999170,16cyclictest28045-21grep19:20:141
2168999170,16cyclictest22887-21ntp_kernel_pll_22:00:171
2168999170,16cyclictest1818-21expr21:25:141
2168999170,16cyclictest17577-21apache_accesses22:50:091
2168999170,16cyclictest10086-21apache_accesses21:40:091
21687991715,1cyclictest0-21swapper/022:00:130
21687991714,2cyclictest6297-21ntp_states23:25:200
21687991714,2cyclictest3976-21H222:10:210
21687991714,2cyclictest32364-21latency_hist00:15:000
21687991714,2cyclictest31470-21nfsd422:15:170
21687991714,2cyclictest31095-21expr19:25:140
21687991714,2cyclictest30147-21http_loadtime20:20:140
21687991714,2cyclictest22966-21munin-plugin-st23:00:010
21687991714,2cyclictest2069-21systemd-udevd23:52:520
21687991714,2cyclictest1948-21systemctl00:15:220
21687991714,2cyclictest18342-21munin-run21:55:000
21687991714,2cyclictest14454-21sed21:45:190
21687991714,2cyclictest0-21swapper/023:20:150
21687991714,1cyclictest0-21swapper/021:12:450
21687991713,2cyclictest0-21swapper/019:40:370
2168799171,15cyclictest863-21avahi-daemon23:45:200
2168799171,15cyclictest7697-21nfsd422:30:210
2168799171,15cyclictest28625-21ls19:20:150
2168799171,15cyclictest13421-21grep00:35:180
2168799171,15cyclictest0-21swapper/019:55:270
2168799170,2cyclictest2069-21systemd-udevd20:48:520
2168799170,2cyclictest1930-21kernelversion19:30:160
2168799170,2cyclictest14815-21sendmail_mailqu23:40:190
2168799170,16cyclictest8721-21smtp00:28:240
2168799170,16cyclictest8603-21sed23:30:160
2168799170,16cyclictest399-20systemd-journal00:04:550
2168799170,16cyclictest28324-21ntpq00:05:180
2168799170,16cyclictest28324-21ntpq00:05:170
2168799170,16cyclictest27531-21cut19:20:000
2168799170,16cyclictest20498-21fschecks_count21:00:140
2168799170,16cyclictest17777-21grep20:55:140
2168799170,16cyclictest16394-21python320:55:020
2168799170,16cyclictest1-21systemd22:50:100
2168799170,16cyclictest11640-21awk23:35:160
2168799170,15cyclictest0-21swapper/020:10:000
21691991614,1cyclictest11009-21grep00:30:202
21691991614,1cyclictest11009-21grep00:30:192
21691991614,1cyclictest0-21swapper/220:10:232
21691991614,1cyclictest0-21swapper/219:20:152
21691991614,1cyclictest0-21swapper/219:10:112
21691991614,1cyclictest0-21swapper/200:35:102
2169199160,2cyclictest3661-21/usr/sbin/munin22:25:112
2169199160,1cyclictest0-21swapper/223:25:142
2169199160,1cyclictest0-21swapper/221:10:162
2169199160,15cyclictest23833-21netstat21:05:172
2169199160,15cyclictest18009-21expr22:50:112
2169199160,15cyclictest0-21swapper/222:55:192
2169199160,15cyclictest0-21swapper/222:20:152
2169199160,15cyclictest0-21swapper/221:45:112
2169199160,15cyclictest0-21swapper/221:40:052
2169199160,15cyclictest0-21swapper/220:15:052
2169199160,15cyclictest0-21swapper/220:15:052
2169199160,15cyclictest0-21swapper/200:25:132
21689991614,1cyclictest15188-21egrep19:55:131
21689991614,1cyclictest0-21swapper/120:40:111
21689991614,1cyclictest0-21swapper/120:00:141
21689991613,2cyclictest3991-21H222:10:211
21689991613,2cyclictest12597-21df00:35:121
2168999160,1cyclictest0-21swapper/123:30:111
2168999160,1cyclictest0-21swapper/119:45:121
2168999160,1cyclictest0-21swapper/119:35:171
2168999160,15cyclictest21443-21apache_accesses23:55:111
2168999160,15cyclictest1726-21smartctl19:30:131
2168999160,15cyclictest0-21swapper/120:10:021
2168999160,15cyclictest0-21swapper/119:50:191
2168999160,15cyclictest0-21swapper/119:50:181
21687991614,1cyclictest31603-21cpuspeed_turbos23:15:110
21687991614,1cyclictest0-21swapper/022:48:590
21687991614,1cyclictest0-21swapper/021:55:150
21687991614,1cyclictest0-21swapper/021:30:100
21687991614,1cyclictest0-21swapper/021:05:280
21687991614,1cyclictest0-21swapper/020:35:160
21687991614,1cyclictest0-21swapper/000:20:020
2168799160,1cyclictest2977-21cat20:30:120
2168799160,1cyclictest0-21swapper/021:25:190
2168799160,15cyclictest4651-21df19:35:130
2168799160,15cyclictest26317-21expr23:05:130
2168799160,15cyclictest22797-21cat19:10:120
2168799160,15cyclictest21445-21apache_processe23:55:100
2168799160,15cyclictest12660-21cpuspeed_turbos19:50:130
2168799160,15cyclictest12660-21cpuspeed_turbos19:50:130
2168799160,15cyclictest0-21swapper/022:20:120
2168799160,15cyclictest0-21swapper/022:10:110
2168799160,15cyclictest0-21swapper/021:20:130
2168799160,15cyclictest0-21swapper/020:02:000
2168799160,15cyclictest0-21swapper/019:45:310
21689991512,2cyclictest399-20systemd-journal00:30:011
21689991512,2cyclictest399-20systemd-journal00:30:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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