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2026-05-17 - 14:13
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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 100 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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