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2026-07-28 - 22:54
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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 Tue Jul 28, 2026 12:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4200992521,3cyclictest28292-21phpquery12:38:591
419999230,19cyclictest0-21swapper/007:40:400
4200992212,9cyclictest0-21swapper/111:56:501
420099220,21cyclictest0-21swapper/109:00:161
419999220,18cyclictest0-21swapper/011:45:170
420199214,8cyclictest0-21swapper/210:09:042
420199214,1cyclictest0-21swapper/210:55:212
420199201,17cyclictest22916-21run-parts08:40:012
420199201,16cyclictest0-21swapper/210:00:192
419999204,15cyclictest0-21swapper/011:07:290
4201991914,3cyclictest0-21swapper/209:17:412
420199190,1cyclictest0-21swapper/212:32:592
420099192,11cyclictest7668-21munin-run09:10:011
4200991915,3cyclictest426-21systemd-udevd08:04:521
4200991915,3cyclictest0-21swapper/110:16:191
420099190,18cyclictest0-21swapper/107:15:261
4199991916,2cyclictest2872-21systemd-logind12:06:510
419999190,4cyclictest13519-21grep12:10:190
420199182,1cyclictest16728-21switchtime12:15:212
420199182,16cyclictest0-21swapper/211:52:232
420199182,15cyclictest98642chrt11:07:342
420199182,15cyclictest19868-21chrt12:22:232
4201991815,2cyclictest4082-21cat08:05:132
4201991815,2cyclictest3989-21H222:10:212
4201991815,2cyclictest1406-21chrt08:58:072
4201991815,1cyclictest0-21swapper/207:50:362
4201991815,1cyclictest0-21swapper/207:41:072
4201991814,3cyclictest25673-21perf10:40:012
4201991813,4cyclictest29042-21nvmesmart_nvme011:40:192
420199181,16cyclictest23632-21awk09:35:222
420199180,1cyclictest0-21swapper/209:20:142
420199180,17cyclictest3981-21H222:10:212
420199180,16cyclictest10898-21dpkg11:10:012
420199180,15cyclictest0-21swapper/209:55:372
420099182,15cyclictest238602chrt07:41:261
420099182,15cyclictest21-21ksoftirqd/109:49:381
4200991817,1cyclictest21-21ksoftirqd/107:22:251
4200991816,1cyclictest0-21swapper/108:25:021
4200991815,2cyclictest426-21systemd-udevd10:38:511
4200991815,2cyclictest1856-21systemd-udevd10:34:511
4200991814,3cyclictest4099-21H222:10:211
4200991814,3cyclictest0-21swapper/107:10:121
420099180,17cyclictest426-21systemd-udevd08:40:521
4199991816,1cyclictest9-21ksoftirqd/010:47:070
4199991816,1cyclictest12523-21uname11:10:210
4199991816,1cyclictest0-21swapper/011:52:140
4199991815,2cyclictest4299-21if_eno108:05:160
4199991815,2cyclictest0-21swapper/009:55:100
4199991813,3cyclictest0-21swapper/011:40:520
419999180,2cyclictest3979-21H222:10:210
419999180,17cyclictest0-21swapper/009:54:480
420199172,15cyclictest28-21ksoftirqd/208:10:462
4201991715,1cyclictest10994-21timerwakeupswit08:15:242
4201991715,1cyclictest0-21swapper/209:25:122
4201991714,2cyclictest3987-21H222:10:212
4201991714,2cyclictest32717-21munin-run09:55:002
4201991714,2cyclictest3125-21latency09:00:182
4201991714,2cyclictest21972-21pzem_energy10:30:202
4201991713,3cyclictest0-21swapper/207:56:532
420199171,15cyclictest17405-21if_err_enp1s011:20:152
420199171,15cyclictest0-21swapper/207:26:242
420199170,2cyclictest6550-21grep09:05:222
420199170,2cyclictest4035-21H222:10:212
420199170,2cyclictest28195-21chrt12:38:412
420199170,2cyclictest2479-21chrt08:01:202
420199170,2cyclictest19704-21chrt10:25:452
420199170,2cyclictest16180-21/usr/sbin/munin07:30:152
420199170,2cyclictest1521-21lxd11:28:432
420199170,16cyclictest6946-21sshd12:00:132
420199170,16cyclictest399-20systemd-journal07:21:382
420199170,16cyclictest30479-21expr11:45:142
420199170,16cyclictest29035-21tr08:50:142
420199170,16cyclictest26972-21cat08:45:172
420199170,16cyclictest26330-21ntpq09:40:182
420199170,16cyclictest20816-21expr12:25:132
420199170,16cyclictest14533-21idleruntime11:15:142
420199170,16cyclictest10728-21awk10:10:182
420199170,16cyclictest0-21swapper/207:35:112
420199170,15cyclictest3987-21H222:10:212
4200991716,1cyclictest21-21ksoftirqd/111:33:191
4200991715,1cyclictest44442chrt10:58:201
4200991714,2cyclictest9278-21kernelversion09:10:181
4200991714,2cyclictest7915-21grep12:00:171
4200991714,2cyclictest7608-21nfsd408:10:181
4200991714,2cyclictest26155-21nfsd409:40:171
4200991714,2cyclictest2503-21sed11:50:211
4200991714,2cyclictest20300-21sed12:25:011
4200991714,2cyclictest19546-21fschecks_count07:35:151
4200991714,2cyclictest15117-21ls07:25:221
4200991714,2cyclictest10233-21apt-get11:10:001
4200991714,2cyclictest0-21swapper/109:50:191
4200991714,2cyclictest0-21swapper/109:20:131
4200991713,3cyclictest20133-21cron12:25:011
420099171,1cyclictest131192chrt09:16:331
420099171,15cyclictest6899-21timerwakeupswit11:00:221
420099170,2cyclictest5243-21nfsd410:00:181
420099170,2cyclictest28644-21munin-plugin-st10:45:001
420099170,2cyclictest21139-21smartctl08:35:151
420099170,1cyclictest4099-21H222:10:211
420099170,1cyclictest0-21swapper/110:50:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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