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2026-08-13 - 07:27
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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 376 highest latencies:
System rackdslot0.osadl.org (updated Thu Aug 13, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2105499350,35cyclictest0-21swapper/121:14:561
2105499230,22cyclictest0-21swapper/121:31:261
2104999222,13cyclictest19633-21munin-plugin-st22:00:000
21058992116,4cyclictest0-21swapper/200:32:302
2105499212,18cyclictest0-21swapper/123:55:291
21054992117,1cyclictest0-21swapper/100:17:481
2105499210,20cyclictest870-21systemd-logind20:56:521
2105899204,15cyclictest0-21swapper/222:17:442
2105499204,11cyclictest0-21swapper/100:00:151
2105499202,3cyclictest17021-21grep20:00:131
21054992017,2cyclictest21-21ksoftirqd/120:35:111
21049992018,1cyclictest0-21swapper/000:25:000
2105899193,15cyclictest23464-21wc20:10:152
21058991917,1cyclictest0-21swapper/222:58:522
21058991916,2cyclictest23521-21chrt23:55:422
21058991914,1cyclictest0-21swapper/223:54:422
2105899190,1cyclictest0-21swapper/223:05:162
2105899190,18cyclictest0-21swapper/223:36:162
21054991918,1cyclictest28056-21tr23:10:121
21054991917,1cyclictest0-21swapper/100:20:361
21054991916,2cyclictest0-21swapper/121:23:191
21054991913,5cyclictest843-21systemd-network00:26:541
2105499190,18cyclictest0-21swapper/123:04:341
2104999192,16cyclictest0-21swapper/020:37:450
21049991917,1cyclictest0-21swapper/023:03:540
21049991914,3cyclictest22589-21nfsd419:10:170
2104999191,3cyclictest9928-21nfsd421:40:180
2105899182,15cyclictest31511-21anvil19:28:562
2105899182,15cyclictest31511-21anvil19:28:562
2105899182,15cyclictest0-21swapper/200:35:202
21058991816,1cyclictest0-21swapper/222:38:502
2105899181,1cyclictest0-21swapper/222:06:352
21058991810,4cyclictest0-21swapper/220:21:542
2105899180,3cyclictest18416-21wc20:00:212
2105899180,17cyclictest17460-21grep22:50:192
2105899180,15cyclictest0-21swapper/222:50:002
2105499182,15cyclictest11110-21chrt00:32:501
21054991816,1cyclictest0-21swapper/122:32:551
21054991815,2cyclictest3603-21processes22:25:191
21054991814,3cyclictest399-20systemd-journal23:46:371
21054991814,3cyclictest3976-21H222:10:211
21054991814,3cyclictest1928-21smtpd19:30:421
2105499181,16cyclictest21-21ksoftirqd/122:05:011
2105499180,3cyclictest0-21swapper/119:55:011
2104999182,9cyclictest9474-21munin-run20:45:010
2104999182,9cyclictest9474-21munin-run20:45:000
2104999182,15cyclictest0-21swapper/023:55:200
21049991815,2cyclictest23401-21find21:08:590
21049991815,2cyclictest2095-21grep22:25:140
21049991814,3cyclictest20071-21switchtime21:00:200
2104999181,2cyclictest28117-21tr23:10:120
2105899178,5cyclictest0-21swapper/222:20:072
21058991715,1cyclictest22799-21processes19:10:192
21058991715,1cyclictest0-21swapper/220:47:522
21058991714,2cyclictest9335-21cat20:44:552
21058991714,2cyclictest9335-21cat20:44:552
21058991714,2cyclictest7466-21taskset22:35:022
21058991714,2cyclictest4810-21fschecks_time20:35:162
21058991714,2cyclictest3836-21munin-run23:25:002
21058991714,2cyclictest32648-21expr19:30:142
21058991714,2cyclictest26775-21date19:20:022
21058991714,2cyclictest26334-21cat22:10:122
21058991714,2cyclictest26232-21sed20:15:172
21058991714,2cyclictest25013-21smartctl00:00:152
21058991714,2cyclictest20922-21df22:00:152
21058991714,2cyclictest19956-21expr20:05:132
21058991714,2cyclictest19584-21python322:00:012
2105899171,2cyclictest2834-21cpuspeed_turbos19:35:132
2105899170,2cyclictest3140-21expr21:30:142
2105899170,2cyclictest1830-21/usr/sbin/munin22:25:152
2105899170,2cyclictest16444-21cat20:55:162
2105899170,2cyclictest16075-21/usr/sbin/munin23:45:102
2105899170,2cyclictest14849-21expr21:50:122
2105899170,2cyclictest1156-21cpuspeed_turbos20:30:162
2105899170,2cyclictest10673-21cpuspeed_turbos22:40:132
2105899170,2cyclictest10624-21bounce19:45:462
2105899170,2cyclictest0-21swapper/223:15:142
2105899170,16cyclictest8566-21/usr/sbin/munin21:40:112
2105899170,16cyclictest6891-21nfsd421:35:182
2105899170,16cyclictest6855-21apt23:30:002
2105899170,16cyclictest5601-21lxd19:24:522
2105899170,16cyclictest3987-21H222:10:212
2105899170,16cyclictest30141-21fschecks_time21:20:162
2105899170,16cyclictest28216-21expr23:10:132
2105899170,16cyclictest27329-21expr00:05:182
2105899170,16cyclictest25394-21ntpq21:10:182
2105899170,16cyclictest23416-21pzem_power23:00:192
2105899170,16cyclictest18473-21grep21:00:122
2105899170,16cyclictest13115-21ntp_states21:45:182
2105899170,16cyclictest12173-21if_enp1s019:50:152
2105899170,16cyclictest0-21swapper/200:25:222
21054991715,1cyclictest24639-21chrt20:13:151
21054991714,2cyclictest9342-21sh20:45:011
21054991714,2cyclictest9342-21sh20:45:001
21054991714,2cyclictest3985-21H222:10:211
21054991714,2cyclictest32361-21expr23:15:221
21054991714,2cyclictest31550-21cut22:20:141
21054991714,2cyclictest25729-21hddtemp_smartct23:05:141
21054991714,2cyclictest2361-21nfsd423:20:181
21054991714,2cyclictest21908-21df19:10:141
21054991714,2cyclictest1594-21systemd19:50:201
21054991714,2cyclictest14562-21nfsd423:40:171
21054991714,2cyclictest14420-21/usr/sbin/munin21:50:171
21054991714,2cyclictest12255-21chrt20:47:031
21054991714,2cyclictest1079-21cups-browsed23:25:211
2105499171,1cyclictest5883-21cut21:35:141
2105499171,15cyclictest13919-21fschecks_time22:45:141
2105499170,2cyclictest30657-21taskset22:15:451
2105499170,2cyclictest26932-21sed22:10:161
2105499170,2cyclictest20347-21idleruntime20:05:161
2105499170,2cyclictest1377-21lxd23:30:411
2105499170,16cyclictest4220-21nfsd419:35:171
2105499170,16cyclictest3987-21H222:10:211
2105499170,16cyclictest3901-21munin-run20:35:001
2105499170,16cyclictest3053-21systemd-logind19:26:521
2105499170,16cyclictest3053-21systemd-logind19:26:521
2105499170,16cyclictest20787-21runrttasks23:50:371
2105499170,16cyclictest201rcuc/100:15:011
2105499170,16cyclictest17364-21ntp_kernel_pll_22:50:171
2105499170,16cyclictest14496-21snapd19:15:281
2105499170,16cyclictest14183-21cron00:40:001
2105499170,16cyclictest13438-21cat20:50:141
2105499170,16cyclictest10445-21sort22:40:011
2104999172,1cyclictest0-21swapper/023:54:080
21049991714,2cyclictest8212-21cron19:49:550
21049991714,2cyclictest7309-21memory00:25:170
21049991714,2cyclictest28121-21missed_timers00:05:210
21049991714,2cyclictest27511-21latency_hist20:20:000
21049991714,2cyclictest20342-21apache_accesses22:00:120
21049991714,2cyclictest18259-21ntp_states20:00:180
21049991714,2cyclictest1615-21ls23:20:150
21049991714,2cyclictest14420-21/usr/sbin/munin21:50:120
21049991714,2cyclictest10101-21munin-run22:40:010
21049991714,1cyclictest0-21swapper/021:15:150
2104999171,1cyclictest10797-21timerandwakeup00:30:220
2104999170,2cyclictest31704-21chrt21:24:020
2104999170,2cyclictest27030-21anvil23:06:130
2104999170,2cyclictest21151-21python323:00:000
2104999170,2cyclictest17976-21munin-run21:00:010
2104999170,2cyclictest14496-21snapd19:50:280
2104999170,2cyclictest13829-21cstates22:45:140
2104999170,16cyclictest3414-21master23:32:490
2104999170,16cyclictest30674-21apache_accesses20:25:120
2104999170,16cyclictest28009-21grep20:20:130
2104999170,16cyclictest26113-21postgres21:12:260
2104999170,16cyclictest25531-21cron22:10:010
2104999170,16cyclictest23237-21cut22:05:140
2104999170,16cyclictest2253-21needreboot20:30:200
2104999170,16cyclictest20176-21df_inode20:05:140
2104999170,16cyclictest16902-21irqstats22:50:150
2104999170,16cyclictest15228-21munin-run20:55:010
2104999170,16cyclictest14500-21snapd19:38:280
2104999170,16cyclictest13952-21sed00:39:000
2104999170,16cyclictest1240-21ntp_kernel_pll_21:25:200
2104999170,16cyclictest11454-21kernelversion22:40:160
2104999170,15cyclictest3976-21H222:10:210
2104999170,15cyclictest0-21swapper/022:15:150
21058991614,1cyclictest0-21swapper/221:25:132
21058991614,1cyclictest0-21swapper/220:25:142
21058991614,1cyclictest0-21swapper/219:40:132
21058991613,2cyclictest7474-21dpkg23:30:022
21058991613,2cyclictest27280-21ls21:15:142
2105899160,1cyclictest0-21swapper/223:40:122
2105899160,1cyclictest0-21swapper/220:50:132
2105899160,1cyclictest0-21swapper/200:15:122
2105899160,1cyclictest0-21swapper/200:10:122
2105899160,15cyclictest21136-21apt-get21:05:112
2105899160,15cyclictest0-21swapper/219:55:122
21054991614,1cyclictest17593-21cat21:55:141
21054991614,1cyclictest0-21swapper/122:55:131
21054991614,1cyclictest0-21swapper/122:40:211
21054991614,1cyclictest0-21swapper/121:05:121
21054991614,1cyclictest0-21swapper/120:20:131
21054991614,1cyclictest0-21swapper/120:15:151
21054991613,2cyclictest9892-21awk19:45:191
2105499160,1cyclictest0-21swapper/123:40:011
2105499160,1cyclictest0-21swapper/121:40:151
2105499160,15cyclictest0-21swapper/121:00:181
2105499160,15cyclictest0-21swapper/120:25:131
2105499160,15cyclictest0-21swapper/119:40:181
2105499160,15cyclictest0-21swapper/100:05:171
21049991614,1cyclictest58972sleep019:40:060
21049991614,1cyclictest30028-21apt-get00:10:120
21049991614,1cyclictest0-21swapper/021:50:010
21049991614,1cyclictest0-21swapper/021:35:120
21049991614,1cyclictest0-21swapper/020:45:010
21049991614,1cyclictest0-21swapper/019:55:170
21049991614,1cyclictest0-21swapper/019:15:180
21049991613,2cyclictest5069-21chrt21:32:440
21049991613,2cyclictest31013-21expr23:15:130
21049991613,2cyclictest3053-21systemd-logind23:42:520
21049991613,2cyclictest16093-21apache_accesses23:45:090
2104999160,2cyclictest1229-21nfsd419:30:180
2104999160,15cyclictest30942-21ntp_states19:25:200
2104999160,15cyclictest30942-21ntp_states19:25:190
2104999160,15cyclictest24876-21df00:00:130
2104999160,15cyclictest22477-21apache_accesses20:10:110
2104999160,15cyclictest0-21swapper/023:25:150
2104999160,15cyclictest0-21swapper/022:30:100
2104999160,15cyclictest0-21swapper/022:20:130
2104999160,15cyclictest0-21swapper/000:15:120
2105499150,14cyclictest0-21swapper/119:20:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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