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2026-05-15 - 09:28
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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 Fri May 15, 2026 00:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1904999230,20cyclictest11700-21grep19:55:012
1904999226,15cyclictest0-21swapper/222:14:162
19047992113,5cyclictest0-21swapper/023:55:140
1904999202,17cyclictest7285-21fschecks_time21:40:142
19049992020,0cyclictest0-21swapper/200:38:522
19049992018,1cyclictest0-21swapper/223:30:172
1904999200,17cyclictest0-21swapper/223:00:192
1904899201,18cyclictest23216-21smartctl23:05:191
1904999193,15cyclictest28911-21latency_hist00:15:002
1904999193,15cyclictest0-21swapper/200:04:232
19049991917,1cyclictest0-21swapper/222:30:202
1904999190,16cyclictest4035-21H222:10:212
19048991916,2cyclictest19815-21sessionclean20:08:591
1904899191,17cyclictest18032-21cpuspeed_turbos23:55:141
1904899191,17cyclictest0-21swapper/122:35:191
1904899190,3cyclictest28151-21grep21:20:161
1904899190,16cyclictest3987-21H222:10:211
1904799192,2cyclictest3976-21H222:10:210
19047991917,1cyclictest0-21swapper/000:26:150
19049991815,2cyclictest26036-21nfsd419:20:162
19049991815,2cyclictest21333-21chrt19:10:492
19049991815,2cyclictest21333-21chrt19:10:492
19049991814,3cyclictest399-20systemd-journal23:25:002
19049991814,1cyclictest0-21swapper/221:10:032
19049991813,3cyclictest455-21plymouthd23:35:192
1904999181,15cyclictest7291-21fschecks_count19:45:152
1904999180,1cyclictest0-21swapper/220:20:122
1904999180,17cyclictest0-21swapper/222:50:172
1904999180,17cyclictest0-21swapper/221:52:162
1904999180,17cyclictest0-21swapper/221:52:162
1904999180,17cyclictest0-21swapper/221:05:122
19048991816,1cyclictest0-21swapper/121:37:101
1904899180,3cyclictest814-21cat21:30:131
1904899180,17cyclictest2007-21systemd-journal21:45:261
1904799182,1cyclictest3981-21H222:10:210
19047991817,1cyclictest9-21ksoftirqd/019:26:510
19047991815,2cyclictest17277-21nfsd422:55:180
1904799180,2cyclictest3987-21H222:10:210
1904799180,17cyclictest21649-21cron19:15:010
1904799180,17cyclictest21649-21cron19:15:010
1904799180,16cyclictest0-21swapper/000:15:140
19049991715,1cyclictest8225-21expr20:45:132
19049991715,1cyclictest0-21swapper/223:09:582
19049991715,1cyclictest0-21swapper/222:55:172
19049991715,1cyclictest0-21swapper/221:35:502
19049991715,1cyclictest0-21swapper/219:41:082
19049991714,2cyclictest5065-21/usr/sbin/munin20:40:122
19049991714,2cyclictest3991-21H222:10:212
19049991714,2cyclictest12805-21ls23:45:142
19049991714,2cyclictest12078-21/usr/sbin/munin19:55:202
19049991714,2cyclictest1085-21gdbus00:30:212
19049991713,3cyclictest1377-21lxd21:02:512
1904999171,15cyclictest11401-21taskset21:47:082
1904999170,2cyclictest3976-21H222:10:212
1904999170,2cyclictest26198-21cat22:15:142
1904999170,2cyclictest26198-21cat22:15:132
1904999170,2cyclictest25956-21perf00:10:012
1904999170,2cyclictest18278-21cut20:05:172
1904999170,2cyclictest17515-21/usr/sbin/munin22:00:152
1904999170,2cyclictest17479-21sed22:00:022
1904999170,1cyclictest0-21swapper/220:02:032
1904999170,16cyclictest5601-21lxd20:50:502
1904999170,16cyclictest4676-21sendmail-msp20:40:002
1904999170,16cyclictest3979-21H222:10:212
1904999170,16cyclictest3365-21munin-run23:30:002
1904999170,16cyclictest31435-21nfsd421:25:172
1904999170,16cyclictest31223-21cat20:30:012
1904999170,16cyclictest29737-21latency_hist23:20:012
1904999170,16cyclictest28701-21tail19:25:162
1904999170,16cyclictest25003-21cstates21:15:162
1904999170,16cyclictest23326-21cpuspeed_turbos20:15:122
1904999170,16cyclictest18817-21latency23:55:172
1904999170,16cyclictest15232-21chrt20:55:502
1904999170,16cyclictest0-21swapper/222:44:432
1904999170,15cyclictest3976-21H222:10:212
19048991715,1cyclictest0-21swapper/100:36:251
19048991714,2cyclictest7362-21/usr/sbin/munin19:45:151
19048991714,2cyclictest455-21plymouthd21:40:121
19048991714,2cyclictest4099-21H222:10:211
19048991714,2cyclictest30675-21bounce20:25:521
19048991714,2cyclictest27603-21nfsd400:10:181
19048991714,2cyclictest25859-21find22:15:111
19048991714,2cyclictest25859-21find22:15:101
19048991714,2cyclictest25103-21ls23:10:151
19048991714,2cyclictest22259-21expr21:10:141
19048991714,2cyclictest1525-21lxd23:22:391
19048991714,2cyclictest1399-21http_loadtime19:35:151
19048991714,2cyclictest1377-21lxd22:14:501
19048991714,2cyclictest1292-21awk00:20:171
19048991714,2cyclictest12919-21ls20:55:001
19048991714,2cyclictest12181-21grep22:45:221
19048991713,2cyclictest3985-21H222:10:211
19048991713,2cyclictest3985-21H222:10:211
1904899171,15cyclictest7014-21chrt20:40:271
1904899171,15cyclictest0-21swapper/119:40:241
1904899170,2cyclictest539-21mailstats20:30:201
1904899170,2cyclictest15884-21missed_timers21:55:161
1904899170,2cyclictest13613-21expr20:55:131
1904899170,2cyclictest10889-21postgres19:50:201
1904899170,2cyclictest1035-21thermald19:55:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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