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2026-03-20 - 02:38
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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 Thu Mar 19, 2026 12:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9883992113,7cyclictest0-21swapper/208:40:192
988199211,17cyclictest0-21swapper/008:06:360
9881992020,0cyclictest0-21swapper/007:38:250
988199201,18cyclictest0-21swapper/012:10:010
988399190,4cyclictest870-21systemd-logind08:48:522
988399190,18cyclictest426-21systemd-udevd11:04:512
988399190,17cyclictest870-21systemd-logind09:58:522
988299193,15cyclictest0-21swapper/112:14:081
9882991917,1cyclictest0-21swapper/109:56:501
9882991916,2cyclictest26914-21fschecks_time08:35:151
9882991916,1cyclictest0-21swapper/109:23:501
9882991914,3cyclictest0-21swapper/108:32:561
988299190,18cyclictest3162-21cat07:55:011
988199190,18cyclictest0-21swapper/011:04:000
988199190,18cyclictest0-21swapper/010:33:480
988199190,18cyclictest0-21swapper/010:33:480
988399182,15cyclictest5575-21expr08:55:152
988399182,15cyclictest28-21ksoftirqd/207:29:372
9883991816,1cyclictest133892chrt11:56:432
9883991814,2cyclictest9336-21tr10:00:142
9883991813,4cyclictest426-21systemd-udevd12:14:512
988399180,3cyclictest399-20systemd-journal10:59:552
988399180,2cyclictest4035-21H222:10:212
988399180,17cyclictest0-21swapper/210:13:172
988399180,16cyclictest3989-21H222:10:212
988299182,15cyclictest0-21swapper/112:34:191
988299182,15cyclictest0-21swapper/109:40:011
988299182,15cyclictest0-21swapper/107:35:141
9882991816,1cyclictest0-21swapper/111:40:021
9882991816,1cyclictest0-21swapper/110:59:361
9882991815,2cyclictest31460-21nfsd409:40:181
9882991813,3cyclictest0-21swapper/111:24:591
988299181,2cyclictest19696-21gpg-connect-age12:10:001
988299181,1cyclictest0-21swapper/107:17:501
988299180,17cyclictest1525-21lxd08:16:421
988299180,17cyclictest0-21swapper/110:50:181
988199182,15cyclictest9-21ksoftirqd/008:55:150
988199182,15cyclictest0-21swapper/012:30:150
9881991816,1cyclictest31418-21needreboot09:40:180
9881991815,2cyclictest3989-21H222:10:210
9881991815,2cyclictest19782-21switchtime10:15:220
9881991815,2cyclictest15968-21cron09:15:000
9881991814,3cyclictest3987-21H222:10:210
9881991814,3cyclictest0-21swapper/007:49:460
988199180,2cyclictest1441-21sendmail-mta08:50:140
988399172,1cyclictest294232sleep209:37:092
9883991715,1cyclictest104052chrt11:53:392
9883991715,1cyclictest0-21swapper/211:40:182
9883991714,2cyclictest5059-21cut10:45:202
9883991714,2cyclictest18152-21cat08:20:122
9883991714,2cyclictest15777-21taskset09:12:252
988399171,15cyclictest0-21swapper/208:15:132
988399170,2cyclictest9605-21pzem_voltage09:00:222
988399170,2cyclictest29955-21grep07:45:142
988399170,2cyclictest17650-21cut09:15:182
988399170,2cyclictest16754-21snapd08:10:182
988399170,2cyclictest14301-21ntp_kernel_pll_07:15:202
988399170,2cyclictest11447-21chrt08:08:432
988399170,1cyclictest6848-21grep10:50:152
988399170,16cyclictest3991-21H222:10:212
988399170,16cyclictest30231-21/usr/sbin/munin09:40:142
988399170,16cyclictest29724-21ntpq12:25:162
988399170,16cyclictest25023-21proc_pri10:25:182
988399170,16cyclictest24645-21grep08:30:172
988399170,16cyclictest24148-21cut07:35:012
988399170,16cyclictest23438-21pzem_voltage09:25:202
988399170,16cyclictest20764-21mailstats09:20:212
988399170,16cyclictest19819-21threads10:15:222
988399170,16cyclictest19470-21chrt11:13:202
988399170,16cyclictest15977-21mailstats11:05:192
988399170,16cyclictest0-21swapper/210:30:112
988399170,16cyclictest0-21swapper/210:30:112
988399170,16cyclictest0-21swapper/210:05:472
988399170,16cyclictest0-21swapper/208:25:592
9882991715,1cyclictest0-21swapper/110:15:231
9882991714,2cyclictest22482-21df09:25:141
9882991714,2cyclictest16745-21snapd12:37:481
9882991714,2cyclictest1300-21lxd09:50:421
9882991714,2cyclictest12127-21nfsd409:05:181
988299170,3cyclictest0-21swapper/110:31:171
988299170,3cyclictest0-21swapper/110:31:171
988299170,2cyclictest4099-21H222:10:211
988299170,2cyclictest30889-21latency_hist12:30:011
988299170,16cyclictest6766-21grep11:45:171
988299170,16cyclictest3991-21H222:10:211
988299170,16cyclictest3837-21/usr/sbin/munin11:40:201
988299170,16cyclictest3753-21awk08:50:171
988299170,16cyclictest31819-21acpi08:45:121
988299170,16cyclictest26084-21ps09:30:181
988299170,16cyclictest22811-21awk07:30:161
988299170,16cyclictest21380-21awk11:15:191
988299170,16cyclictest16898-21netstat07:20:181
988299170,16cyclictest1650-21switchtime10:40:191
988299170,16cyclictest16436-21basename12:05:001
988299170,16cyclictest15945-21lxd11:52:421
988299170,16cyclictest12875-21nfsd411:00:161
9881991714,2cyclictest5380-21mktemp11:45:010
9881991714,2cyclictest5313-21awk09:50:200
9881991714,2cyclictest3894-21cat10:45:130
9881991714,2cyclictest2628-21missed_timers12:35:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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