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2026-08-04 - 11:02
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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 792 highest latencies:
System rackdslot0.osadl.org (updated Tue Aug 04, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20548993029,0cyclictest0-21swapper/100:31:501
20548993028,2cyclictest21-21ksoftirqd/100:21:441
20548993021,9cyclictest0-21swapper/122:45:161
20548993021,9cyclictest0-21swapper/122:45:161
20548993021,9cyclictest0-21swapper/100:10:161
20548992617,9cyclictest0-21swapper/122:20:291
2055299240,5cyclictest0-21swapper/221:43:592
20548992320,2cyclictest3983-21H222:10:211
2054899230,22cyclictest0-21swapper/122:40:041
20548992214,4cyclictest0-21swapper/122:11:211
2054899220,21cyclictest843-21systemd-network22:59:201
20552992117,3cyclictest0-21swapper/200:29:382
2054899210,19cyclictest3991-21H222:10:211
2054899210,19cyclictest3987-21H222:10:211
2055299204,15cyclictest0-21swapper/220:05:112
2055299202,3cyclictest993-21dbus-daemon00:35:202
20552992019,1cyclictest0-21swapper/200:10:162
20552992017,2cyclictest23702-21sshd23:59:162
20552992016,3cyclictest0-21swapper/221:09:152
20552992014,5cyclictest426-21systemd-udevd22:40:522
20552992014,5cyclictest426-21systemd-udevd22:06:522
2055299200,1cyclictest18160-21ntpq22:50:202
2054899204,15cyclictest0-21swapper/100:19:221
2055299192,16cyclictest18563-21expr23:50:132
20552991916,2cyclictest29363-21missed_timers20:20:192
20552991916,2cyclictest27837-21date23:10:012
20552991916,2cyclictest14411-21needreboot20:50:192
20552991914,4cyclictest0-21swapper/222:25:562
20552991914,2cyclictest3983-21H222:10:212
2055299191,17cyclictest0-21swapper/221:50:142
2055299190,2cyclictest4099-21H222:10:212
2055299190,18cyclictest843-21systemd-network20:40:052
2055299190,18cyclictest3989-21H222:10:212
2055299190,18cyclictest3981-21H222:10:212
2055299190,16cyclictest4099-21H222:10:212
2055299190,16cyclictest3989-21H222:10:212
2055299190,16cyclictest3989-21H222:10:212
2055299190,16cyclictest3983-21H222:10:212
2055299190,16cyclictest3979-21H222:10:212
2055299190,16cyclictest3707-21master19:29:462
2054899192,2cyclictest0-21swapper/120:40:341
2054899192,16cyclictest0-21swapper/123:45:561
20548991917,1cyclictest0-21swapper/121:26:441
20548991916,2cyclictest0-21swapper/122:17:091
20548991914,4cyclictest0-21swapper/120:48:001
20548991914,2cyclictest3989-21H222:10:211
20548991913,5cyclictest426-21systemd-udevd21:30:521
20548991913,5cyclictest426-21systemd-udevd21:30:511
2054899190,2cyclictest3991-21H222:10:211
2054899190,2cyclictest3985-21H222:10:211
2054899190,16cyclictest4035-21H222:10:211
2054899190,16cyclictest3989-21H222:10:211
2054899190,16cyclictest3989-21H222:10:211
2054899190,16cyclictest3987-21H222:10:211
2054899190,16cyclictest3985-21H222:10:211
2054899190,16cyclictest3981-21H222:10:211
2054899190,16cyclictest3981-21H222:10:211
2054799192,11cyclictest29567-21cat21:20:010
20547991917,1cyclictest9-21ksoftirqd/020:11:160
20547991917,1cyclictest0-21swapper/023:36:500
20547991915,3cyclictest0-21swapper/021:55:190
2054799190,1cyclictest0-21swapper/020:49:500
2054799190,16cyclictest3989-21H222:10:210
2054799190,16cyclictest3981-21H222:10:210
2055299182,15cyclictest468-21latency_hist23:20:012
20552991816,1cyclictest14996-21sh19:55:142
20552991816,1cyclictest13659-21cat23:40:142
20552991815,2cyclictest3987-21H222:10:212
20552991815,2cyclictest2565-21processes23:20:202
20552991815,2cyclictest0-21swapper/219:10:152
20552991814,3cyclictest31621-21cpuspeed_turbos20:25:132
20552991814,3cyclictest11026-21smtpd19:47:052
2055299181,16cyclictest1856-21systemd-udevd23:46:522
2055299180,3cyclictest7996-21needreboot23:30:182
2055299180,3cyclictest5856-21postgres00:21:102
2055299180,2cyclictest4035-21H222:10:212
2055299180,2cyclictest3979-21H222:10:212
2055299180,2cyclictest0-21swapper/222:24:312
2055299180,17cyclictest3981-21H222:10:212
2055299180,17cyclictest3979-21H222:10:212
2055299180,17cyclictest1114-21lldpd21:03:352
2055299180,16cyclictest3991-21H222:10:212
2055299180,16cyclictest3976-21H222:10:212
2055299180,16cyclictest16451-21latency_hist22:50:012
2055299180,16cyclictest16451-21latency_hist22:50:012
2055299180,15cyclictest4035-21H222:10:212
2055299180,15cyclictest3983-21H222:10:212
2054899182,15cyclictest4035-21H222:10:211
20548991815,2cyclictest14504-21snapd22:31:581
20548991814,4cyclictest0-21swapper/120:59:241
20548991814,3cyclictest3983-21H222:10:211
20548991814,3cyclictest3983-21H222:10:211
2054899181,2cyclictest3981-21H222:10:211
2054899181,16cyclictest21455-21fgrep20:05:201
2054899180,2cyclictest4099-21H222:10:211
2054899180,1cyclictest0-21swapper/119:22:311
2054899180,17cyclictest3985-21H222:10:211
2054899180,17cyclictest1079-21cups-browsed23:38:551
2054899180,16cyclictest3976-21H222:10:211
2054899180,15cyclictest3991-21H222:10:211
2054899180,15cyclictest3991-21H222:10:211
2054899180,15cyclictest3989-21H222:10:211
2054899180,15cyclictest3983-21H222:10:211
2054799182,1cyclictest177172chrt23:47:270
20547991816,1cyclictest0-21swapper/019:38:550
20547991816,1cyclictest0-21swapper/019:31:500
20547991815,2cyclictest3989-21H222:10:210
20547991815,2cyclictest2872-21systemd-logind23:56:510
20547991814,3cyclictest4035-21H222:10:210
20547991814,3cyclictest3983-21H222:10:210
2054799181,2cyclictest3985-21H222:10:210
2054799181,1cyclictest0-21swapper/019:45:310
20547991810,4cyclictest0-21swapper/021:42:450
2054799180,3cyclictest1431-21grep00:15:160
2054799180,2cyclictest3979-21H222:10:210
2054799180,17cyclictest3979-21H222:10:210
2054799180,17cyclictest3979-21H222:10:210
2054799180,16cyclictest3979-21H222:10:210
2054799180,16cyclictest3976-21H222:10:210
2054799180,15cyclictest3989-21H222:10:210
2054799180,15cyclictest3987-21H222:10:210
2054799180,15cyclictest3985-21H222:10:210
2055299172,1cyclictest0-21swapper/222:11:042
20552991715,1cyclictest6466-21apache_volume21:35:122
20552991715,1cyclictest0-21swapper/222:55:162
20552991714,2cyclictest8003-21apache_volume22:35:112
20552991714,2cyclictest3979-21H222:10:212
20552991714,2cyclictest27930-21egrep23:10:132
2055299171,15cyclictest0-21swapper/221:55:142
2055299170,2cyclictest3979-21H222:10:212
2055299170,2cyclictest3053-21systemd-logind19:40:512
2055299170,2cyclictest22697-21expr23:00:142
2055299170,1cyclictest0-21swapper/220:10:122
2055299170,1cyclictest0-21swapper/220:00:152
2055299170,16cyclictest4199-21seq20:31:532
2055299170,16cyclictest3655-21awk21:30:112
2055299170,16cyclictest3655-21awk21:30:112
2055299170,16cyclictest25908-21pzem_power19:15:222
20548991716,1cyclictest21-21ksoftirqd/122:26:021
20548991714,2cyclictest8651-21fschecks_count22:35:131
20548991714,2cyclictest4099-21H222:10:211
20548991714,2cyclictest3991-21H222:10:211
20548991714,2cyclictest3450-21gsd-color19:35:021
20548991714,2cyclictest3138-21nfsd420:30:181
20548991714,2cyclictest25874-21if_lxdbr023:05:161
20548991714,2cyclictest15129-21hddtemp_smartct19:55:151
20548991713,3cyclictest3985-21H222:10:211
20548991712,2cyclictest3981-21H222:10:211
2054899171,1cyclictest22277-21sendmail_mailst22:00:211
2054899170,2cyclictest4035-21H222:10:211
2054899170,2cyclictest27231-21expr00:05:141
2054899170,2cyclictest18316-21/usr/sbin/munin23:50:201
2054899170,16cyclictest4099-21H222:10:211
2054899170,16cyclictest3989-21H222:10:211
2054899170,16cyclictest3985-21H222:10:211
2054899170,16cyclictest3976-21H222:10:211
2054899170,16cyclictest24257-21ps20:10:191
2054899170,16cyclictest0-21swapper/121:55:211
2054799172,1cyclictest0-21swapper/023:25:150
2054799172,14cyclictest0-21swapper/020:09:210
20547991715,1cyclictest9-21ksoftirqd/023:53:330
20547991714,2cyclictest4035-21H222:10:210
20547991714,2cyclictest3991-21H222:10:210
20547991714,2cyclictest3985-21H222:10:210
20547991714,2cyclictest3981-21H222:10:210
20547991714,2cyclictest3665-21apache_processe21:30:120
20547991714,2cyclictest3665-21apache_processe21:30:110
20547991714,2cyclictest2242-21apache_processe22:25:130
20547991714,2cyclictest1523-21lxd20:18:510
20547991714,2cyclictest14832-21apache_volume21:50:120
20547991714,2cyclictest12368-21proc_pri22:40:200
2054799171,1cyclictest0-21swapper/020:35:180
2054799170,2cyclictest5997-21smartctl22:30:160
2054799170,2cyclictest3987-21H222:10:210
2054799170,2cyclictest3983-21H222:10:210
2054799170,2cyclictest29562-21awk20:20:200
2054799170,2cyclictest2435-21fschecks_count20:30:150
2054799170,2cyclictest14504-21snapd21:21:580
2054799170,2cyclictest0-21swapper/019:50:140
2054799170,1cyclictest0-21swapper/022:39:190
2054799170,16cyclictest3985-21H222:10:210
2054799170,16cyclictest3979-21H222:10:210
2054799170,16cyclictest3976-21H222:10:210
2054799170,16cyclictest29157-21cut23:10:180
2054799170,16cyclictest23039-21perf22:05:010
2054799170,16cyclictest16232-21cut20:55:140
2054799170,16cyclictest14940-21cat20:50:230
2054799170,16cyclictest10544-21nfsd400:30:190
20552991613,2cyclictest20598-21dpkg22:00:022
2055299160,2cyclictest29634-21df22:15:142
2054899160,15cyclictest3991-21H222:10:211
2054899160,15cyclictest0-21swapper/119:50:081
20547991614,1cyclictest0-21swapper/023:40:090
20547991614,1cyclictest0-21swapper/023:20:110
20547991614,1cyclictest0-21swapper/023:15:140
20547991614,1cyclictest0-21swapper/023:00:180
20547991614,1cyclictest0-21swapper/022:20:120
20547991614,1cyclictest0-21swapper/020:40:110
20547991613,2cyclictest3981-21H222:10:210
20547991613,2cyclictest24229-21grep00:00:130
2054799160,15cyclictest0-21swapper/022:50:020
2054799160,15cyclictest0-21swapper/019:40:170
2054799160,15cyclictest0-21swapper/019:25:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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