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2026-05-17 - 07:22
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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 Sun May 17, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
939899220,18cyclictest0-21swapper/219:40:102
939899220,18cyclictest0-21swapper/219:40:102
9398992113,5cyclictest0-21swapper/221:50:122
939899210,20cyclictest843-21systemd-network19:20:512
938999210,20cyclictest25440-21grep22:30:130
939899202,17cyclictest0-21swapper/221:35:142
9393992018,1cyclictest12693-21nfsd422:05:181
9393992017,2cyclictest26489-21grep00:25:191
939899193,15cyclictest0-21swapper/222:04:192
9398991917,1cyclictest0-21swapper/220:07:492
9398991917,1cyclictest0-21swapper/200:21:062
9398991916,2cyclictest29878-21timerwakeupswit00:30:222
9398991916,2cyclictest29878-21timerwakeupswit00:30:212
9398991914,4cyclictest0-21swapper/222:10:012
939899191,16cyclictest15614-21cpuspeed_turbos23:10:132
939899190,18cyclictest0-21swapper/222:40:132
939899190,18cyclictest0-21swapper/200:26:352
939899190,17cyclictest23026-21python319:35:012
939399191,17cyclictest16822-21ntp_kernel_err23:10:181
9389991916,2cyclictest17284-21cpuspeed_turbos00:10:130
9389991916,2cyclictest14499-21snapd22:57:570
939899182,2cyclictest22148-21chrt00:19:582
939899182,15cyclictest13971-21grep19:15:212
939899182,15cyclictest13971-21grep19:15:202
939899182,15cyclictest0-21swapper/220:35:012
9398991816,1cyclictest0-21swapper/223:02:092
9398991816,1cyclictest0-21swapper/222:00:012
9398991815,2cyclictest19127-21nfsd419:25:192
9398991815,1cyclictest0-21swapper/220:21:272
9398991814,2cyclictest11354-21/usr/sbin/munin00:00:152
9398991814,1cyclictest0-21swapper/221:10:212
9398991810,4cyclictest0-21swapper/223:50:012
939899180,3cyclictest31366-21runrttasks19:45:402
939899180,16cyclictest27544-21grep23:30:182
9393991816,1cyclictest31218-21timerwakeupswit21:40:221
9393991816,1cyclictest0-21swapper/119:53:141
9393991815,2cyclictest27124-21cut21:35:151
9393991814,3cyclictest0-21swapper/121:11:081
939399181,16cyclictest22049-21smtpd22:24:261
939399181,16cyclictest22049-21smtpd22:24:261
9393991811,3cyclictest0-21swapper/121:25:161
939399180,4cyclictest843-21systemd-network22:10:421
938999182,2cyclictest24705-21latency21:30:160
938999182,15cyclictest0-21swapper/021:49:430
9389991815,2cyclictest7091-21processes20:00:190
9389991814,3cyclictest5714-21cpuspeed_turbos21:55:140
938999181,2cyclictest27323-21tune2fs19:40:150
938999181,2cyclictest27323-21tune2fs19:40:150
938999181,2cyclictest14550-21snapd19:15:480
938999181,2cyclictest14550-21snapd19:15:480
938999181,1cyclictest0-21swapper/020:25:170
938999180,3cyclictest31690-21python323:40:000
938999180,2cyclictest1829-21systemd-journal21:15:000
938999180,17cyclictest0-21swapper/020:10:130
9398991715,1cyclictest92142chrt22:57:492
9398991715,1cyclictest125312chrt23:05:002
9398991715,1cyclictest0-21swapper/223:40:012
9398991715,1cyclictest0-21swapper/223:20:172
9398991715,1cyclictest0-21swapper/222:10:132
9398991714,2cyclictest6688-21perf22:55:012
9398991714,2cyclictest4035-21H222:10:212
9398991714,2cyclictest32684-21chrt20:48:142
9398991714,2cyclictest2523-21nfsd422:45:162
9398991714,2cyclictest0-21swapper/221:35:012
939899170,3cyclictest0-21swapper/222:27:002
939899170,2cyclictest9680-21/usr/sbin/munin19:10:122
939899170,2cyclictest6876-21nfsd420:00:172
939899170,2cyclictest32285-21expr19:50:142
939899170,2cyclictest23686-21dpkg19:35:012
939899170,2cyclictest14366-21ls20:15:132
939899170,2cyclictest14249-21cpuspeed_turbos00:05:132
939899170,16cyclictest8609-21/usr/sbin/munin23:55:162
939899170,16cyclictest6270-21cat23:50:142
939899170,16cyclictest3414-21master23:15:582
939899170,16cyclictest3221-21chrt20:53:022
939899170,16cyclictest30853-21processes21:40:202
939899170,16cyclictest23941-21cat23:25:122
939899170,16cyclictest21233-21expr21:25:152
939899170,16cyclictest20720-21awk22:20:172
939899170,16cyclictest20720-21awk22:20:172
939899170,16cyclictest17978-21uname22:15:172
939899170,16cyclictest1711-21vmstat21:45:232
939899170,16cyclictest15523-21apache_processe21:15:132
939899170,16cyclictest1440-21apt-config00:40:012
939899170,16cyclictest0-21swapper/220:10:132
939399172,1cyclictest258362chrt23:28:231
939399172,1cyclictest0-21swapper/120:50:091
9393991715,1cyclictest13437-21chrt00:01:541
9393991715,1cyclictest0-21swapper/120:45:201
9393991714,2cyclictest7630-21grep23:50:211
9393991714,2cyclictest713-21taskset22:44:331
9393991714,2cyclictest25580-21fschecks_time20:35:141
9393991714,2cyclictest23475-21if_lxdbr000:20:161
9393991714,2cyclictest2252-21munin-plugin-st21:50:001
9393991714,2cyclictest20790-21nfsd420:25:181
9393991714,2cyclictest18853-21df21:20:141
9393991714,2cyclictest17467-21http_loadtime20:20:161
9393991714,1cyclictest0-21swapper/119:55:181
939399171,15cyclictest24137-21mailstats22:25:231
939399170,2cyclictest7133-21/usr/sbin/munin21:55:211
939399170,2cyclictest4089-21kernelversion23:45:161
939399170,2cyclictest4071-21awk21:50:161
939399170,2cyclictest28477-21timerandwakeup19:40:231
939399170,2cyclictest28477-21timerandwakeup19:40:231
939399170,2cyclictest20228-21apt19:30:011
939399170,2cyclictest13563-21munin-run20:15:011
939399170,1cyclictest0-21swapper/123:20:131
939399170,1cyclictest0-21swapper/122:53:421
939399170,16cyclictest6344-21sed20:00:151
939399170,16cyclictest27375-21latency23:30:161
939399170,16cyclictest23515-21nfsd420:30:191
939399170,16cyclictest22943-21apt-get19:35:001
939399170,16cyclictest21091-21cut00:15:181
939399170,16cyclictest16730-21nfsd421:15:201
939399170,16cyclictest15407-21cpuspeed_turbos19:20:131
939399170,16cyclictest15290-21latency_hist23:10:001
939399170,16cyclictest10841-21nfsd421:05:191
939399170,16cyclictest10792-21missed_timers19:10:191
939399170,16cyclictest10179-21cat23:00:141
9389991715,1cyclictest0-21swapper/023:49:260
9389991715,1cyclictest0-21swapper/022:05:140
9389991714,2cyclictest8153-21ntp_states21:00:190
9389991714,2cyclictest8153-21ntp_states21:00:180
9389991714,2cyclictest31282-21cat22:40:140
9389991714,2cyclictest26555-21nfsd400:25:200
9389991714,2cyclictest22529-21latency_hist00:20:010
9389991714,2cyclictest14337-21egrep22:10:130
9389991714,2cyclictest1274-21runrttasks23:16:290
9389991713,3cyclictest0-21swapper/019:10:230
938999171,15cyclictest0-21swapper/020:45:180
938999170,2cyclictest3880-21idleruntime-cro22:50:000
938999170,2cyclictest30279-21sed22:39:000
938999170,2cyclictest21695-21missed_timers19:30:250
938999170,2cyclictest15065-21idleruntime-cro23:10:000
938999170,16cyclictest9002-21ls23:55:140
938999170,16cyclictest25411-21cat19:35:210
938999170,16cyclictest22104-21needreboot23:20:170
938999170,16cyclictest17509-21perf19:25:010
938999170,16cyclictest14499-21snapd21:25:280
938999170,16cyclictest13993-21latency_hist00:05:000
938999170,16cyclictest1300-21lxd22:00:500
938999170,16cyclictest11957-21apt-get21:10:010
938999170,16cyclictest1035-21thermald21:50:190
938999170,16cyclictest0-21swapper/019:55:180
9398991614,1cyclictest0-21swapper/221:05:152
9398991614,1cyclictest0-21swapper/220:25:132
9398991613,2cyclictest29511-21pzem_power22:35:212
9398991613,2cyclictest17126-21apache_accesses00:10:112
939899160,2cyclictest25548-21tune2fs20:35:132
939899160,1cyclictest0-21swapper/222:30:452
939899160,1cyclictest0-21swapper/220:40:162
939899160,15cyclictest6763-21/usr/sbin/munin21:00:132
939899160,15cyclictest6763-21/usr/sbin/munin21:00:132
939899160,15cyclictest6335-21run-parts21:00:002
939899160,15cyclictest29330-21cpuspeed_turbos23:35:132
939899160,15cyclictest0-21swapper/219:55:142
9393991614,1cyclictest30793-21ntp_states19:45:181
9393991614,1cyclictest18196-21apt-get23:15:131
9393991614,1cyclictest0-21swapper/123:35:131
9393991614,1cyclictest0-21swapper/122:45:121
9393991614,1cyclictest0-21swapper/122:35:021
9393991614,1cyclictest0-21swapper/121:04:561
9393991614,1cyclictest0-21swapper/121:04:561
9393991614,1cyclictest0-21swapper/100:30:111
9393991614,1cyclictest0-21swapper/100:30:101
939399160,1cyclictest4333-21expr20:55:141
939399160,1cyclictest0-21swapper/120:40:161
939399160,1cyclictest0-21swapper/120:15:131
939399160,1cyclictest0-21swapper/119:35:081
939399160,15cyclictest7492-21ls22:55:141
939399160,15cyclictest3983-21H222:10:211
939399160,15cyclictest3256-21apache200:37:581
939399160,15cyclictest0-21swapper/123:55:141
939399160,15cyclictest0-21swapper/123:40:131
939399160,15cyclictest0-21swapper/122:15:121
939399160,15cyclictest0-21swapper/120:05:091
939399160,15cyclictest0-21swapper/100:10:131
939399160,15cyclictest0-21swapper/100:05:211
9389991614,1cyclictest0-21swapper/023:40:140
9389991614,1cyclictest0-21swapper/023:11:110
9389991614,1cyclictest0-21swapper/022:15:210
9389991614,1cyclictest0-21swapper/020:15:110
9389991613,2cyclictest29900-21sed00:30:220
9389991613,2cyclictest29900-21sed00:30:220
9389991613,2cyclictest1035-21thermald20:55:220
938999160,2cyclictest9987-21grep23:00:140
938999160,1cyclictest5984-21grep23:50:120
938999160,1cyclictest15500-21/usr/sbin/munin21:15:130
938999160,1cyclictest0-21swapper/020:35:170
938999160,1cyclictest0-21swapper/020:20:170
938999160,1cyclictest0-21swapper/019:25:180
938999160,15cyclictest8348-21apache_accesses20:05:120
938999160,15cyclictest32105-21find19:50:120
938999160,15cyclictest29014-21nfsd420:40:180
938999160,15cyclictest27488-21memory21:35:170
938999160,15cyclictest23793-21cpuspeed_turbos23:25:130
938999160,15cyclictest22760-21cpuspeed_turbos00:20:130
938999160,15cyclictest14797-21fschecks_time00:05:130
938999160,15cyclictest0-21swapper/023:30:140
938999160,15cyclictest0-21swapper/022:25:210
938999160,15cyclictest0-21swapper/022:20:170
938999160,15cyclictest0-21swapper/022:20:160
938999160,15cyclictest0-21swapper/021:25:000
938999160,15cyclictest0-21swapper/020:50:020
938999160,15cyclictest0-21swapper/019:45:130
9393991515,0cyclictest0-21swapper/122:30:071
9393991514,1cyclictest0-21swapper/121:30:171
938999150,1cyclictest5077-21smartctl22:50:160
938999150,1cyclictest0-21swapper/021:40:140
938999150,1cyclictest0-21swapper/000:35:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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