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2026-08-19 - 04:10
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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 376 highest latencies:
System rackdslot0.osadl.org (updated Wed Aug 19, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3016899370,36cyclictest14505-21snapd19:43:140
3017799246,15cyclictest0-21swapper/219:20:172
3017799236,15cyclictest0-21swapper/219:40:182
3017399230,18cyclictest25859-21fschecks_time20:55:161
3016899230,5cyclictest0-21swapper/022:42:100
3017799210,17cyclictest0-21swapper/222:42:202
30177992016,1cyclictest0-21swapper/221:57:512
3017399205,14cyclictest0-21swapper/120:05:181
3017399205,14cyclictest0-21swapper/120:05:181
30168992018,1cyclictest0-21swapper/000:40:010
3017799193,15cyclictest0-21swapper/222:22:192
3017799193,15cyclictest0-21swapper/220:26:522
30177991917,1cyclictest0-21swapper/200:35:062
30177991916,2cyclictest2885-21iscsid21:35:192
30173991917,1cyclictest24391-21timerwakeupswit22:45:221
30173991914,4cyclictest0-21swapper/119:30:531
30173991912,6cyclictest843-21systemd-network21:34:191
3016899191,15cyclictest0-21swapper/022:25:180
3016899191,13cyclictest16200-21perf20:40:010
30168991910,8cyclictest843-21systemd-network20:51:340
30177991816,1cyclictest2491-21ntp_offset23:05:182
30177991816,1cyclictest0-21swapper/223:35:132
30177991816,1cyclictest0-21swapper/221:05:292
30177991816,1cyclictest0-21swapper/220:47:212
30177991814,3cyclictest0-21swapper/220:20:362
30177991814,1cyclictest0-21swapper/219:50:172
3017799180,3cyclictest863-21avahi-daemon00:20:002
3017799180,3cyclictest15892-21snapd20:05:342
3017799180,3cyclictest15892-21snapd20:05:342
3017799180,2cyclictest18276-21nfsd400:30:172
3017799180,17cyclictest10627-21apt-get00:20:012
3017399182,15cyclictest0-21swapper/122:04:061
30173991814,3cyclictest16534-21munin-run00:30:011
3017399181,2cyclictest18296-21expr19:45:171
3016899182,15cyclictest299182chrt22:55:590
30168991816,1cyclictest0-21swapper/023:03:160
30168991813,3cyclictest0-21swapper/023:50:500
3017799172,1cyclictest0-21swapper/223:22:082
3017799172,1cyclictest0-21swapper/220:55:152
30177991715,1cyclictest143402chrt19:38:352
30177991715,1cyclictest0-21swapper/221:04:262
30177991714,2cyclictest9590-21cpuspeed_turbos19:30:142
30177991714,2cyclictest9408-21lxd20:12:512
30177991714,2cyclictest9404-21cron21:25:002
30177991714,2cyclictest32131-21expr00:00:162
30177991714,2cyclictest25548-21timerwakeupswit19:55:232
30177991714,2cyclictest13868-21expr22:30:132
3017799171,15cyclictest0-21swapper/222:35:202
3017799171,15cyclictest0-21swapper/219:10:162
3017799170,2cyclictest5736-21grep21:15:192
3017799170,2cyclictest4225-21proc_pri20:15:212
3017799170,2cyclictest26375-21/usr/sbin/munin20:00:162
3017799170,2cyclictest24868-21netstat21:50:182
3017799170,2cyclictest2007-21systemd-journal22:17:212
3017799170,2cyclictest2007-21systemd-journal22:17:212
3017799170,2cyclictest15892-21snapd20:50:282
3017799170,16cyclictest8796-21timerandwakeup23:15:212
3017799170,16cyclictest4160-21ntp_offset22:10:192
3017799170,16cyclictest3976-21H222:10:212
3017799170,16cyclictest3970-21latency_hist21:15:002
3017799170,16cyclictest30058-21chrt22:57:542
3017799170,16cyclictest29049-21chrt23:55:042
3017799170,16cyclictest28538-21chrt23:53:362
3017799170,16cyclictest24574-21trivial-rewrite22:47:212
3017799170,16cyclictest19259-21ps19:45:212
3017799170,16cyclictest19123-21kernelversion21:40:162
3017799170,16cyclictest16873-21apt-config20:40:012
3017799170,16cyclictest16290-21http20:40:012
3017799170,16cyclictest14194-21apache_processe00:25:122
3017799170,16cyclictest13265-21cron20:35:002
3017799170,16cyclictest12782-21cpuspeed_turbos21:30:142
3017799170,16cyclictest0-21swapper/223:45:022
30173991715,1cyclictest29265-21awk22:55:171
30173991714,2cyclictest5470-21/usr/sbin/munin22:15:171
30173991714,2cyclictest5470-21/usr/sbin/munin22:15:171
30173991714,2cyclictest3908-21ntpq00:05:231
30173991714,2cyclictest29780-21fschecks_time23:55:141
30173991714,2cyclictest24203-21cat21:50:131
30173991714,2cyclictest2322-21cat20:15:011
30173991714,2cyclictest21683-21basename22:45:011
30173991714,2cyclictest21149-21nvmesmart_nvme020:45:181
30173991714,2cyclictest1458-21cat23:05:131
30173991714,2cyclictest1300-21lxd20:50:511
3017399171,15cyclictest4086-21grep22:10:191
3017399171,15cyclictest15056-21/usr/sbin/munin19:40:151
3017399171,15cyclictest10943-21taskset20:30:071
3017399170,2cyclictest843-21systemd-network21:39:591
3017399170,2cyclictest5711-21tr00:10:151
3017399170,2cyclictest28946-21ls21:00:181
3017399170,2cyclictest25061-21nvmesmart_nvme019:55:201
3017399170,2cyclictest20535-21munin-run21:45:001
3017399170,2cyclictest15892-21snapd23:45:271
3017399170,2cyclictest0-21swapper/100:20:171
3017399170,16cyclictest993-21dbus-daemon19:50:011
3017399170,16cyclictest9269-21cut19:30:011
3017399170,16cyclictest870-21systemd-logind22:05:211
3017399170,16cyclictest7122-21apache_accesses21:20:161
3017399170,16cyclictest488-21latency_hist19:15:021
3017399170,16cyclictest3981-21H222:10:211
3017399170,16cyclictest32074-21ntp_states23:00:201
3017399170,16cyclictest28786-21date20:05:001
3017399170,16cyclictest27533-21basename22:55:001
3017399170,16cyclictest21353-21cat21:45:161
3017399170,16cyclictest20712-21ls00:35:171
3017399170,16cyclictest2007-21systemd-journal20:23:301
3017399170,16cyclictest18952-21munin-run22:40:001
3017399170,16cyclictest17850-21latency_hist23:35:001
3017399170,16cyclictest1523-21lxd00:02:351
3017399170,16cyclictest15021-21grep20:35:201
3017399170,16cyclictest12813-21expr22:25:221
3017399170,16cyclictest10573-21perf20:30:001
3016899172,15cyclictest16121-21kworker/0:221:17:280
30168991715,1cyclictest352-21jbd2/nvme0n1p2-22:15:050
30168991715,1cyclictest352-21jbd2/nvme0n1p2-22:15:050
30168991715,1cyclictest0-21swapper/021:30:150
30168991714,2cyclictest856-21ntp_states22:05:190
30168991714,2cyclictest26188-21latency20:55:180
30168991714,2cyclictest21451-21switchtime20:45:210
30168991714,2cyclictest16447-21apt-get22:35:130
30168991714,2cyclictest14495-21snapd21:27:590
30168991714,2cyclictest0-21swapper/019:30:010
3016899171,15cyclictest29189-21tr23:55:140
3016899171,15cyclictest0-21swapper/019:30:140
3016899171,15cyclictest0-21swapper/000:10:210
3016899170,2cyclictest870-21systemd-logind19:38:520
3016899170,2cyclictest8677-21expr20:25:140
3016899170,2cyclictest399-20systemd-journal23:17:010
3016899170,2cyclictest31964-21grep00:00:150
3016899170,2cyclictest31759-21sed22:05:020
3016899170,2cyclictest3108-21smtp19:17:210
3016899170,2cyclictest21622-21fschecks_time21:45:170
3016899170,2cyclictest1300-21lxd21:38:500
3016899170,16cyclictest863-21avahi-daemon19:45:220
3016899170,16cyclictest8487-21expr22:20:150
3016899170,16cyclictest5422-21latency_hist20:20:010
3016899170,16cyclictest5090-21munin-run22:15:000
3016899170,16cyclictest4179-21grep19:20:140
3016899170,16cyclictest3820-21expr00:05:220
3016899170,16cyclictest28323-21expr21:00:140
3016899170,16cyclictest27650-21awk20:00:190
3016899170,16cyclictest25793-21df22:50:150
3016899170,16cyclictest21907-21latency19:50:180
3016899170,16cyclictest1516-21lxd23:12:340
3016899170,16cyclictest14505-21snapd00:25:270
3016899170,16cyclictest12179-21nfsd420:30:180
3016899170,16cyclictest0-21swapper/023:20:110
30177991614,1cyclictest31254-21expr23:00:162
30177991614,1cyclictest15531-21cat23:30:142
30177991614,1cyclictest0-21swapper/221:45:172
30177991614,1cyclictest0-21swapper/221:25:142
30177991613,2cyclictest31940-21grep22:05:142
3017799160,1cyclictest12622-21cpuspeed_turbos23:25:132
3017799160,1cyclictest0-21swapper/223:10:152
3017799160,1cyclictest0-21swapper/222:25:142
3017799160,15cyclictest6568-21latency00:10:182
3017799160,15cyclictest25650-21expr22:50:142
3017799160,15cyclictest0-21swapper/223:40:122
3017799160,15cyclictest0-21swapper/222:00:142
3017799160,15cyclictest0-21swapper/219:15:102
3017799160,15cyclictest0-21swapper/200:05:212
30173991616,0cyclictest1100-21snmpd22:30:111
30173991614,1cyclictest7283-21expr23:15:131
30173991614,1cyclictest4315-21apt-get23:10:131
30173991614,1cyclictest0-21swapper/123:25:131
30173991614,1cyclictest0-21swapper/123:20:111
30173991614,1cyclictest0-21swapper/122:20:141
30173991614,1cyclictest0-21swapper/121:15:131
30173991614,1cyclictest0-21swapper/120:40:151
30173991614,1cyclictest0-21swapper/100:15:191
30173991613,2cyclictest17553-21tune2fs00:30:141
30173991613,2cyclictest11377-21sed21:25:211
3017399160,2cyclictest2198-21if_lxdbr021:10:171
3017399160,1cyclictest0-21swapper/123:50:181
3017399160,1cyclictest0-21swapper/121:55:171
3017399160,1cyclictest0-21swapper/119:15:181
3017399160,15cyclictest21833-21kernelversion23:40:161
3017399160,15cyclictest0-21swapper/123:35:131
3017399160,15cyclictest0-21swapper/121:05:121
3017399160,15cyclictest0-21swapper/120:15:221
3017399160,15cyclictest0-21swapper/119:20:221
30168991614,1cyclictest26356-21taskset21:55:040
30168991614,1cyclictest0-21swapper/023:30:170
30168991614,1cyclictest0-21swapper/023:05:170
30168991614,1cyclictest0-21swapper/022:45:020
30168991614,1cyclictest0-21swapper/021:50:200
30168991614,1cyclictest0-21swapper/021:20:180
30168991614,1cyclictest0-21swapper/021:10:150
30168991614,1cyclictest0-21swapper/021:05:160
30168991614,1cyclictest0-21swapper/020:05:220
30168991614,1cyclictest0-21swapper/020:05:220
30168991614,1cyclictest0-21swapper/019:57:320
30168991613,2cyclictest8283-21find00:15:120
30168991613,2cyclictest16848-21https20:40:010
3016899160,2cyclictest23627-21apache_processe23:45:120
3016899160,1cyclictest5786-21cstates20:20:150
3016899160,1cyclictest0-21swapper/019:10:160
3016899160,15cyclictest18006-21/usr/sbin/munin23:35:130
3016899160,15cyclictest17756-21if_err_eno100:30:160
3016899160,15cyclictest12529-21apache_accesses23:25:100
3016899160,15cyclictest11408-21dpkg00:20:010
3016899160,15cyclictest0-21swapper/023:40:160
3016899160,15cyclictest0-21swapper/022:30:120
3016899160,15cyclictest0-21swapper/021:40:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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