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2026-05-03 - 00:31
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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 Sat May 02, 2026 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1816699284,6cyclictest0-21swapper/011:23:550
18175992414,5cyclictest0-21swapper/211:15:202
1817599240,17cyclictest29329-21turbostat09:25:012
1817599230,16cyclictest0-21swapper/209:48:182
1816699236,3cyclictest7232-21/usr/sbin/munin09:40:140
1816699236,3cyclictest7232-21/usr/sbin/munin09:40:140
1816699236,2cyclictest24535-21awk12:05:180
1816699236,16cyclictest10092-21latency_hist08:50:000
18175992213,6cyclictest3986-21H222:10:212
1817299222,17cyclictest11517-21cron09:50:001
1816699225,2cyclictest31424-21sed12:20:000
1816699225,2cyclictest31424-21sed12:20:000
1816699225,16cyclictest27376-21expr09:20:140
1816699225,16cyclictest15976-21sed10:55:000
1816699224,17cyclictest18154-21/usr/sbin/munin10:00:150
1816699224,17cyclictest0-21swapper/010:39:340
18166992219,2cyclictest4088-21expr11:30:130
18166992219,2cyclictest3987-21H222:10:210
18166992219,2cyclictest29528-21cat07:30:020
18166992219,2cyclictest16985-21sort10:55:140
18166992219,2cyclictest16279-21cat09:00:140
18166992219,2cyclictest15175-21sendmail-mta08:56:170
18166992218,3cyclictest26797-21sed07:25:010
18166992218,3cyclictest2584-21cat08:35:160
18166992215,6cyclictest0-21swapper/012:14:320
1817599213,3cyclictest0-21swapper/211:50:482
1817599213,3cyclictest0-21swapper/211:50:482
1817599210,2cyclictest3985-21H222:10:212
1817599210,2cyclictest23031-21/usr/sbin/munin10:10:202
1816699215,15cyclictest0-21swapper/012:00:020
1816699215,14cyclictest0-21swapper/009:11:280
1816699214,3cyclictest7855-21ls07:45:210
1816699214,16cyclictest8494-21cat10:40:120
1816699214,16cyclictest31158-21apt-config10:25:000
1816699214,16cyclictest28427-21sed10:20:010
1816699214,16cyclictest25519-21tr11:10:160
1816699213,17cyclictest0-21swapper/009:50:240
1816699213,17cyclictest0-21swapper/007:35:010
18166992118,2cyclictest472-21cat07:35:150
18166992118,2cyclictest3989-21H222:10:210
18166992118,2cyclictest26559-21munin-run09:20:000
18166992118,2cyclictest26559-21munin-run09:20:000
18166992118,2cyclictest26429-21cut08:20:180
18166992118,2cyclictest1901-21/usr/sbin/munin11:25:180
18166992118,2cyclictest12237-21ps10:45:210
18166992118,2cyclictest0-21swapper/012:30:160
18166992118,2cyclictest0-21swapper/008:00:110
18166992117,3cyclictest32766-21missed_timers10:25:190
18166992116,5cyclictest0-21swapper/008:30:010
1817599200,2cyclictest4035-21H222:10:212
1817599200,19cyclictest29547-21fschecks_time12:15:142
1817599200,19cyclictest29547-21fschecks_time12:15:142
1817599200,17cyclictest863-21avahi-daemon11:05:212
1816699203,16cyclictest0-21swapper/009:55:130
1816699203,16cyclictest0-21swapper/007:10:140
18166992017,2cyclictest31776-21expr08:30:150
18166992017,2cyclictest2668-21expr10:30:140
18166992017,2cyclictest23450-21timerandwakeup11:05:220
18166992017,2cyclictest112232chrt11:41:450
18166992016,3cyclictest0-21swapper/012:20:130
18166992016,3cyclictest0-21swapper/008:05:200
1816699201,18cyclictest0-21swapper/009:05:140
1817599192,16cyclictest0-21swapper/212:02:492
1817599190,4cyclictest4099-21H222:10:212
1817599190,16cyclictest4099-21H222:10:212
1817599190,16cyclictest3987-21H222:10:212
1817599190,16cyclictest3985-21H222:10:212
1817599190,15cyclictest0-21swapper/211:55:172
18172991914,2cyclictest4035-21H222:10:211
1817299190,16cyclictest3983-21H222:10:211
1816699193,2cyclictest0-21swapper/007:55:150
1816699193,16cyclictest0-21swapper/007:15:110
1816699193,15cyclictest0-21swapper/008:40:130
1816699192,2cyclictest0-21swapper/011:52:250
1816699192,2cyclictest0-21swapper/011:52:240
1816699192,16cyclictest0-21swapper/008:15:160
1816699192,16cyclictest0-21swapper/008:10:210
18166991916,2cyclictest4099-21H222:10:210
18166991916,2cyclictest4099-21H222:10:210
18166991916,2cyclictest3987-21H222:10:210
18166991916,2cyclictest0-21swapper/011:35:130
18166991916,2cyclictest0-21swapper/011:15:180
18166991915,3cyclictest0-21swapper/012:25:170
18166991915,3cyclictest0-21swapper/009:30:020
18166991914,3cyclictest0-21swapper/012:36:110
1816699191,17cyclictest0-21swapper/010:15:010
1816699191,17cyclictest0-21swapper/009:25:140
1816699191,17cyclictest0-21swapper/007:40:380
1817599182,2cyclictest15376-21timerwakeupswit10:50:212
1817599182,15cyclictest4442-21chrt12:27:122
1817599182,15cyclictest32026-21latency_hist09:30:022
1817599182,15cyclictest17438-21nfsd410:55:162
18175991816,1cyclictest3981-21H222:10:212
18175991816,1cyclictest0-21swapper/210:42:082
18175991814,3cyclictest14499-21snapd08:30:282
18175991814,3cyclictest0-21swapper/210:05:322
1817599180,2cyclictest3976-21H222:10:212
1817599180,2cyclictest3976-21H222:10:212
1817599180,17cyclictest0-21swapper/208:01:342
1817599180,16cyclictest28521-21taskset10:20:092
1817299182,15cyclictest72682chrt10:37:461
1817299182,15cyclictest21-21ksoftirqd/109:28:241
18172991816,1cyclictest21-21ksoftirqd/112:38:511
18172991816,1cyclictest21-21ksoftirqd/112:14:091
18172991816,1cyclictest0-21swapper/108:20:561
18172991815,2cyclictest10563-21switchtime07:50:211
18172991814,3cyclictest3991-21H222:10:211
18172991814,3cyclictest3991-21H222:10:211
18172991814,3cyclictest3976-21H222:10:211
18172991814,2cyclictest11747-21nfsd408:50:181
18172991814,1cyclictest0-21swapper/107:41:471
1817299180,2cyclictest4035-21H222:10:211
1817299180,2cyclictest3991-21H222:10:211
1817299180,2cyclictest3991-21H222:10:211
1817299180,2cyclictest3976-21H222:10:211
1817299180,1cyclictest0-21swapper/111:45:001
1817299180,17cyclictest3991-21H222:10:211
1817299180,17cyclictest3991-21H222:10:211
1817299180,16cyclictest3989-21H222:10:211
1817299180,16cyclictest3976-21H222:10:211
1817299180,15cyclictest3979-21H222:10:211
1816699182,2cyclictest0-21swapper/008:50:200
18166991815,3cyclictest0-21swapper/011:00:160
1816699181,16cyclictest0-21swapper/009:45:200
18175991715,1cyclictest0-21swapper/209:55:132
18175991714,2cyclictest7678-21head09:40:172
18175991714,2cyclictest7678-21head09:40:172
18175991714,2cyclictest7611-21/usr/sbin/munin08:45:192
18175991714,2cyclictest6217-21awk08:40:182
18175991714,2cyclictest5483-21cat09:35:222
18175991714,2cyclictest4099-21H222:10:212
18175991714,2cyclictest4035-21H222:10:212
18175991714,2cyclictest3987-21H222:10:212
18175991714,2cyclictest3979-21H222:10:212
18175991714,2cyclictest21805-21grep07:15:152
18175991714,2cyclictest2076-21chrt10:30:112
18175991714,2cyclictest18611-21/usr/sbin/munin09:05:132
18175991714,1cyclictest0-21swapper/211:10:202
1817599170,2cyclictest4035-21H222:10:212
1817599170,2cyclictest3985-21H222:10:212
1817599170,2cyclictest31415-21switchtime07:30:222
1817599170,2cyclictest14538-21ntpq08:55:192
1817599170,1cyclictest0-21swapper/209:31:172
1817599170,1cyclictest0-21swapper/208:35:142
1817599170,16cyclictest9162-21/usr/sbin/munin11:40:122
1817599170,16cyclictest3983-21H222:10:212
1817599170,16cyclictest3983-21H222:10:212
1817599170,16cyclictest3981-21H222:10:212
1817599170,16cyclictest3979-21H222:10:212
1817599170,16cyclictest32125-21expr12:20:132
1817599170,16cyclictest31738-21cpuspeed_turbos10:25:142
1817599170,16cyclictest3058-21rs:main2
1817599170,16cyclictest28873-21expr08:25:142
1817599170,16cyclictest23548-21ls12:05:142
1817599170,16cyclictest20376-21ntp_states11:00:182
1817599170,16cyclictest19383-21vmstat10:00:212
1817599170,16cyclictest1515-21lxd07:40:412
1817599170,16cyclictest13240-21awk09:50:172
1817599170,16cyclictest11471-21cron11:45:002
1817599170,16cyclictest11456-21memory08:50:172
1817599170,16cyclictest10885-21cpuspeed_turbos10:45:142
1817599170,15cyclictest3981-21H222:10:212
1817599170,15cyclictest11725-21cpuspeed_turbos07:55:132
18172991715,1cyclictest2062-21mailstats11:25:201
18172991714,2cyclictest4035-21H222:10:211
18172991714,2cyclictest3991-21H222:10:211
18172991714,2cyclictest3981-21H222:10:211
18172991714,2cyclictest3976-21H222:10:211
18172991714,2cyclictest29921-21missed_timers12:15:171
18172991714,2cyclictest29921-21missed_timers12:15:171
18172991714,2cyclictest28647-21cpuspeed_turbos10:20:121
18172991714,2cyclictest27299-21/usr/sbin/munin11:15:191
18172991714,2cyclictest1377-21lxd10:58:421
18172991713,3cyclictest4035-21H222:10:211
18172991713,3cyclictest3989-21H222:10:211
1817299171,2cyclictest8785-21idleruntime10:40:151
1817299171,15cyclictest20589-21seq09:05:351
1817299171,14cyclictest0-21swapper/108:57:521
1817299170,2cyclictest411-21acpi09:30:131
1817299170,2cyclictest4035-21H222:10:211
1817299170,2cyclictest3991-21H222:10:211
1817299170,2cyclictest3985-21H222:10:211
1817299170,2cyclictest26616-21tlsmgr07:29:031
1817299170,1cyclictest0-21swapper/108:11:261
1817299170,17cyclictest0-21swapper/111:20:181
1817299170,16cyclictest8853-21cut08:45:171
1817299170,16cyclictest6224-21sed12:30:171
1817299170,16cyclictest3983-21H222:10:211
1817299170,16cyclictest3983-21H222:10:211
1817299170,16cyclictest3981-21H222:10:211
1817299170,16cyclictest3979-21H222:10:211
1817299170,16cyclictest3976-21H222:10:211
1817299170,16cyclictest3707-21master10:00:081
1817299170,16cyclictest25204-21nfsd407:20:191
1817299170,16cyclictest24608-21sendmail_mailst10:10:191
1817299170,15cyclictest3987-21H222:10:211
1817599160,15cyclictest5238-21cpuspeed_turbos10:35:142
18172991614,1cyclictest0-21swapper/112:20:101
18172991614,1cyclictest0-21swapper/110:05:141
18172991614,1cyclictest0-21swapper/108:00:141
18172991613,2cyclictest14896-21ntp_offset10:50:181
1817299160,1cyclictest0-21swapper/107:35:151
1817299160,15cyclictest2727-21grep10:30:151
1817299160,15cyclictest27059-21ls09:20:141
1817299160,15cyclictest19419-21ls11:00:141
1817299160,15cyclictest14690-21awk09:55:101
1817299160,15cyclictest0-21swapper/112:25:161
1817299160,15cyclictest0-21swapper/111:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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