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2026-08-25 - 19:31
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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 100 highest latencies:
System rackdslot0.osadl.org (updated Tue Aug 25, 2026 12:46:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2519899230,5cyclictest0-21swapper/211:10:132
2519499230,5cyclictest0-21swapper/011:22:460
2519899220,21cyclictest843-21systemd-network10:37:052
2519499226,2cyclictest3053-21systemd-logind08:28:520
2519499220,4cyclictest0-21swapper/010:20:000
2519899216,14cyclictest0-21swapper/210:46:052
25195992112,0cyclictest0-21swapper/110:01:321
25194992114,4cyclictest0-21swapper/010:42:030
2519499210,0cyclictest9-21ksoftirqd/009:20:030
2519499202,3cyclictest26885-21ntpq07:10:170
25198991917,1cyclictest28-21ksoftirqd/207:51:302
25198991916,2cyclictest16537-21grep10:40:152
2519899191,17cyclictest19111-21nfsd408:50:182
2519899191,11cyclictest6758-21latency_hist07:35:002
2519899190,18cyclictest0-21swapper/207:45:522
25195991916,2cyclictest13920-21cstates09:40:151
2519499192,2cyclictest23288-21sed09:00:020
2519499192,16cyclictest1840-21munin-plugin-st09:20:000
25194991917,1cyclictest0-21swapper/008:34:270
25194991916,2cyclictest21291-21latency_hist10:50:010
25194991916,2cyclictest11677-21date08:40:000
25194991915,3cyclictest24974-21tr10:00:140
25194991915,3cyclictest10726-21cat11:25:210
25194991914,1cyclictest0-21swapper/007:35:160
2519499191,3cyclictest27674-21grep08:10:140
2519499191,17cyclictest0-21swapper/012:10:120
2519899182,1cyclictest0-21swapper/209:18:512
25198991816,1cyclictest22735-21ntp_kernel_err10:50:192
25198991816,1cyclictest0-21swapper/212:00:002
25198991816,1cyclictest0-21swapper/209:36:212
25198991815,2cyclictest31941-21seq08:18:132
25198991815,2cyclictest18353-21chrt09:46:412
25198991814,3cyclictest455-21plymouthd07:40:192
25198991814,3cyclictest455-21plymouthd07:40:192
2519899181,2cyclictest3991-21H222:10:212
2519899180,17cyclictest7347-21cpuspeed_turbos10:25:142
2519899180,17cyclictest3989-21H222:10:212
2519899180,17cyclictest0-21swapper/209:25:222
2519899180,16cyclictest11686-21python308:40:012
2519599182,15cyclictest3992-21H222:10:211
2519599182,15cyclictest21-21ksoftirqd/108:21:051
2519599182,15cyclictest0-21swapper/110:35:551
25195991816,1cyclictest13787-21ntp_kernel_pll_08:40:171
25195991815,2cyclictest3651-21tr11:15:131
2519599181,2cyclictest3983-21H222:10:211
2519599181,16cyclictest3989-21H222:10:211
2519599180,3cyclictest27126-21gdbus11:00:021
2519599180,2cyclictest3985-21H222:10:211
2519599180,16cyclictest7549-21uname11:20:181
2519599180,16cyclictest4099-21H222:10:211
2519599180,16cyclictest23671-21cron10:55:001
2519499182,15cyclictest7729-21grep12:20:150
25194991816,1cyclictest31118-21tr10:10:140
25194991816,1cyclictest0-21swapper/011:40:170
25194991816,1cyclictest0-21swapper/007:50:180
25194991816,1cyclictest0-21swapper/007:41:450
25194991816,1cyclictest0-21swapper/007:41:450
25194991815,2cyclictest6392-21systemctl12:15:200
25194991815,2cyclictest6298-21sed10:20:200
25194991815,2cyclictest29288-21awk10:05:180
25194991815,2cyclictest24182-21grep10:55:130
25194991815,2cyclictest14538-21awk07:45:190
25194991815,2cyclictest101rcuc/012:35:140
25194991814,3cyclictest3029-21cat08:25:020
25194991814,3cyclictest26494-21sessionclean08:09:000
25194991814,3cyclictest22427-21cat10:50:180
25194991814,3cyclictest0-21swapper/009:55:150
25194991814,3cyclictest0-21swapper/009:51:270
25194991814,3cyclictest0-21swapper/007:15:550
25194991814,3cyclictest0-21swapper/007:15:540
2519499181,2cyclictest10790-21cut10:30:150
2519499181,16cyclictest9462sleep012:08:310
2519499181,16cyclictest5202-21basename09:25:120
2519499181,16cyclictest19915-21nfsd407:55:180
2519499181,16cyclictest17726-21cut08:50:010
2519499181,16cyclictest12862-21sed12:30:000
2519499181,16cyclictest0-21swapper/009:00:150
2519499181,16cyclictest0-21swapper/009:00:150
25198991715,1cyclictest285382chrt09:09:492
25198991715,1cyclictest0-21swapper/211:30:192
25198991714,2cyclictest455-21plymouthd08:40:342
25198991714,2cyclictest3989-21H222:10:212
25198991714,2cyclictest3989-21H222:10:212
25198991714,2cyclictest31124-21needreboot11:05:172
25198991714,2cyclictest25930-21expr07:10:122
25198991714,2cyclictest25716-21mailstats10:55:212
25198991714,2cyclictest20270-21grep09:50:182
25198991714,2cyclictest13962-21cat12:30:182
25198991712,4cyclictest3991-21H222:10:212
25198991712,4cyclictest3991-21H222:10:212
2519899170,3cyclictest0-21swapper/211:01:502
2519899170,2cyclictest9790-21sshd12:24:232
2519899170,2cyclictest6835-21ls08:30:172
2519899170,2cyclictest5945-21needreboot12:15:172
2519899170,2cyclictest3979-21H222:10:212
2519899170,2cyclictest3979-21H222:10:212
2519899170,2cyclictest3145-21apache208:25:002
2519899170,2cyclictest28120-21grep10:05:142
2519899170,2cyclictest26042-21timerwakeupswit08:05:222
2519899170,16cyclictest9020-21cut11:25:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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