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2026-08-15 - 06:12
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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 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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