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2026-08-15 - 05:32
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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 Sat Aug 15, 2026 00:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12740992514,0cyclictest0-21swapper/122:15:511
1274099240,23cyclictest31506-21ps19:40:201
1274099237,14cyclictest0-21swapper/119:45:141
12735992323,0cyclictest0-21swapper/019:57:290
12735992319,3cyclictest17311-21grep20:15:010
1274499220,18cyclictest0-21swapper/223:30:212
12740992211,0cyclictest0-21swapper/120:43:111
12740992210,11cyclictest0-21swapper/123:13:501
1274099220,21cyclictest843-21systemd-network21:19:341
1274499210,19cyclictest14495-21snapd19:10:282
12740992111,0cyclictest0-21swapper/122:50:261
1274499204,1cyclictest0-21swapper/221:16:072
1274099208,0cyclictest0-21swapper/123:53:421
1274099208,0cyclictest0-21swapper/123:53:411
12740992011,0cyclictest0-21swapper/121:56:551
12740992011,0cyclictest0-21swapper/120:37:561
12740992010,0cyclictest0-21swapper/122:45:141
12744991917,1cyclictest0-21swapper/220:53:412
12744991916,2cyclictest24871-21switchtime20:25:212
1274099194,9cyclictest25579-21gpgv22:25:011
1274099193,15cyclictest32105-21sessionclean21:39:001
1274099192,16cyclictest17997-21expr22:10:141
12740991917,1cyclictest0-21swapper/123:42:391
12740991917,1cyclictest0-21swapper/121:28:071
1274099190,3cyclictest0-21swapper/123:45:181
1274099190,1cyclictest0-21swapper/120:10:181
1274099190,16cyclictest13585-21apache_accesses23:00:121
1273599192,1cyclictest0-21swapper/022:35:190
12735991919,0cyclictest0-21swapper/021:06:570
12735991917,1cyclictest0-21swapper/022:00:200
12735991915,3cyclictest0-21swapper/021:53:430
1273599190,0cyclictest0-21swapper/020:27:290
1274499182,15cyclictest0-21swapper/221:51:552
12744991816,1cyclictest0-21swapper/219:28:552
12744991815,2cyclictest3981-21H222:10:212
12744991814,3cyclictest14501-21snapd00:25:282
1274499181,2cyclictest11639-21needreboot23:50:172
1274499181,2cyclictest11639-21needreboot23:50:172
1274499180,3cyclictest15892-21snapd23:57:582
1274499180,17cyclictest0-21swapper/222:04:282
1274499180,17cyclictest0-21swapper/200:10:192
1274499180,16cyclictest1972-21cpuspeed_turbos23:35:142
12740991816,2cyclictest0-21swapper/121:51:131
12740991816,1cyclictest0-21swapper/123:22:051
12740991816,1cyclictest0-21swapper/120:24:321
12740991815,2cyclictest3986-21H222:10:211
12740991814,3cyclictest23264-21sendmail_mailst00:10:191
12740991814,3cyclictest12294-21proc_pri22:55:171
12740991814,1cyclictest0-21swapper/100:06:501
1274099181,16cyclictest3985-21H222:10:211
1274099180,3cyclictest3989-21H222:10:211
1274099180,2cyclictest31277-21ntp_kernel_err00:25:181
1274099180,1cyclictest0-21swapper/120:45:261
1274099180,17cyclictest843-21systemd-network23:32:211
1274099180,16cyclictest4035-21H222:10:211
1273599182,15cyclictest7063-21sshd20:51:400
1273599182,15cyclictest27591-21cat21:30:100
1273599182,10cyclictest24374-21python323:20:000
12735991818,0cyclictest0-21swapper/023:49:250
12735991815,2cyclictest9699-21idleruntime20:00:170
12735991815,2cyclictest9699-21idleruntime20:00:170
12735991815,1cyclictest0-21swapper/020:35:010
12735991814,3cyclictest3981-21H222:10:210
1273599181,2cyclictest0-21swapper/000:25:180
1273599181,16cyclictest21809-21grep20:20:180
1273599180,17cyclictest1035-21thermald22:55:190
1273599180,16cyclictest3985-21H222:10:210
12744991715,1cyclictest0-21swapper/200:20:192
12744991714,2cyclictest9286-21cut22:50:182
12744991714,2cyclictest8885-21apache_volume21:55:132
12744991714,2cyclictest4274-21if_enp1s019:50:152
12744991714,2cyclictest2725-21gnome-shell22:08:592
12744991714,2cyclictest27051-21apache_volume21:30:102
12744991714,2cyclictest23733-21df_inode22:20:132
12744991714,2cyclictest21871-21/usr/sbin/munin20:20:192
12744991714,2cyclictest20520-21cupsd23:16:152
12744991714,2cyclictest1970-21apt20:45:112
12744991714,2cyclictest16086-21ls20:10:182
12744991714,2cyclictest10309-21ntpq20:00:202
12744991714,2cyclictest10309-21ntpq20:00:202
12744991714,2cyclictest1005-21sed20:40:222
12744991712,4cyclictest32015-21sessionclean21:38:592
1274499170,2cyclictest627-21ls21:40:122
1274499170,2cyclictest5953-21expr22:45:112
1274499170,2cyclictest21504-21cat22:15:172
1274499170,2cyclictest19310-21expr19:20:142
1274499170,2cyclictest1516-21lxd22:26:512
1274499170,2cyclictest1367-21latency19:45:142
1274499170,16cyclictest8344-21df_inode23:45:132
1274499170,16cyclictest7724-21/usr/sbin/munin20:55:192
1274499170,16cyclictest4790-21ntpq21:45:182
1274499170,16cyclictest4035-21H222:10:212
1274499170,16cyclictest3450-21gsd-color00:30:102
1274499170,16cyclictest32048-21cat22:35:132
1274499170,16cyclictest29529-21expr22:30:142
1274499170,16cyclictest29135-21expr20:35:162
1274499170,16cyclictest28878-21cat19:35:212
1274499170,16cyclictest26501-21df_inode20:30:112
1274499170,16cyclictest26325-21netstat23:20:172
1274499170,16cyclictest26305-21taskset21:25:482
1274499170,16cyclictest20520-21cupsd19:59:262
1274499170,16cyclictest19796-21df_inode23:10:132
1274499170,16cyclictest19757-21expr00:05:182
1274499170,16cyclictest16333-21apache_volume23:05:122
1274499170,16cyclictest15957-21/usr/sbin/munin00:00:122
1274499170,16cyclictest1523-21lxd20:18:512
1274499170,16cyclictest14216-21fschecks_count23:00:152
1274499170,16cyclictest13969-21sort20:05:242
1274499170,16cyclictest1035-21thermald23:40:202
1274499170,16cyclictest0-21swapper/221:05:142
1274499170,16cyclictest0-21swapper/219:30:122
1274499170,16cyclictest0-21swapper/200:35:122
1274499170,16cyclictest0-21swapper/200:15:202
12740991715,1cyclictest0-21swapper/119:30:121
12740991714,2cyclictest3915-21nfsd422:40:171
12740991714,2cyclictest28462-21ntp_kernel_pll_19:35:181
12740991714,2cyclictest28093-21gpgv23:25:011
12740991714,2cyclictest24724-21expr00:15:131
12740991714,2cyclictest1829-21systemd-journal19:17:001
12740991714,2cyclictest17785-21cat20:15:141
12740991714,2cyclictest14501-21snapd19:27:561
12740991713,3cyclictest863-21avahi-daemon22:35:211
1274099171,15cyclictest17900-21timerandwakeup21:10:221
1274099170,2cyclictest7975-21timerandwakeup19:55:211
1274099170,2cyclictest4818-21ntpq21:45:171
1274099170,2cyclictest3987-21H222:10:211
1274099170,2cyclictest28060-21timerandwakeup22:25:221
1274099170,2cyclictest22835-21grep21:20:171
1274099170,2cyclictest18380-21date00:05:011
1274099170,2cyclictest14495-21snapd00:30:271
1274099170,2cyclictest14098-21awk23:55:141
1274099170,16cyclictest8299-21cat20:55:141
1274099170,16cyclictest31570-21date22:35:011
1274099170,16cyclictest3146-21/usr/sbin/munin00:35:201
1274099170,16cyclictest27630-21df_inode21:30:121
1274099170,16cyclictest17012-21fschecks_time23:05:151
1274099170,16cyclictest14496-21snapd19:22:361
1274099170,16cyclictest11697-21nfsd421:00:181
1274099170,16cyclictest10915-21sshd20:00:411
1274099170,16cyclictest10915-21sshd20:00:411
1274099170,16cyclictest0-21swapper/120:34:181
1274099170,0cyclictest0-21swapper/123:35:301
12735991716,1cyclictest9-21ksoftirqd/023:40:150
12735991715,1cyclictest3981-21H222:10:210
12735991715,1cyclictest0-21swapper/019:40:210
12735991714,2cyclictest3991-21H222:10:210
12735991714,2cyclictest2933-21if_lxdbr020:45:160
12735991714,2cyclictest28667-21cpu20:35:160
12735991714,2cyclictest28604-21perf22:30:000
12735991714,2cyclictest26561-21proxymap19:33:410
12735991714,2cyclictest25082-21users22:20:210
12735991714,2cyclictest25016-21df00:15:130
12735991714,2cyclictest24147-21date21:25:010
12735991714,2cyclictest17940-21timerandwakeup19:15:230
1273599171,15cyclictest26524-21chrt21:28:430
1273599171,15cyclictest0-21swapper/022:05:090
1273599170,2cyclictest6001-21munin-run00:40:000
1273599170,2cyclictest3222-21nfsd423:35:180
1273599170,2cyclictest2872-21systemd-logind21:46:520
1273599170,2cyclictest17384-21nvmesmart_nvme000:00:200
1273599170,2cyclictest1523-21lxd21:00:510
1273599170,2cyclictest13482-21ntp_states20:05:200
1273599170,16cyclictest993-21dbus-daemon00:30:200
1273599170,16cyclictest30850-21cat21:35:180
1273599170,16cyclictest29272-21seq00:22:150
1273599170,16cyclictest28302-21nfsd419:35:170
1273599170,16cyclictest24119-21sed19:30:000
1273599170,16cyclictest19756-21irqstats21:15:170
1273599170,16cyclictest19671-21cat23:10:120
1273599170,16cyclictest16592-21/usr/sbin/munin23:05:130
1273599170,16cyclictest13662-21expr23:55:110
1273599170,16cyclictest0-21swapper/023:22:130
1273599170,16cyclictest0-21swapper/022:18:550
12744991614,1cyclictest31072-21sed19:40:162
12744991613,2cyclictest2335-21apache_volume22:40:112
1274499160,15cyclictest0-21swapper/223:25:002
1274499160,15cyclictest0-21swapper/222:10:172
1274499160,15cyclictest0-21swapper/221:20:112
1274499160,15cyclictest0-21swapper/221:00:152
12740991614,1cyclictest0-21swapper/120:50:141
12740991613,2cyclictest13387-21grep20:05:201
1274099160,15cyclictest28401-21nfsd400:20:171
1274099160,15cyclictest14799-21ntpq19:10:161
1274099160,15cyclictest14117-21/usr/sbin/munin21:05:171
12735991614,1cyclictest3450-21gsd-color20:15:110
12735991614,1cyclictest31381-21apache_volume23:30:110
12735991614,1cyclictest0-21swapper/023:50:130
12735991614,1cyclictest0-21swapper/023:50:120
12735991614,1cyclictest0-21swapper/020:55:130
12735991614,1cyclictest0-21swapper/000:11:450
12735991613,2cyclictest3123-21grep22:40:140
1273599160,15cyclictest9256-21expr21:55:150
1273599160,15cyclictest3450-21gsd-color23:25:090
1273599160,15cyclictest19291-21expr19:20:140
1273599160,15cyclictest18699-21cat21:15:010
1273599160,15cyclictest17735-21ls22:10:140
1273599160,15cyclictest0-21swapper/022:30:130
1273599160,15cyclictest0-21swapper/021:40:090
1273599160,15cyclictest0-21swapper/020:40:170
1273599160,15cyclictest0-21swapper/019:10:110
1273599160,15cyclictest0-21swapper/000:05:140
12735991513,1cyclictest0-21swapper/022:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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