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2026-07-21 - 12:03
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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 50 highest latencies:
System rackdslot3.osadl.org (updated Tue Jul 21, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
160572225162,51sleep00-21swapper/019:09:040
139491210177,22phc2sys0-21swapper/319:06:323
157842204172,21sleep10-21swapper/119:05:361
158472202168,23sleep20-21swapper/219:06:252
161302164124,14sleep00-21swapper/019:10:010
1792921590,2sleep11642399cyclictest21:25:241
1330121410,3sleep31642599cyclictest23:30:263
139391740,1ptp4l391rcuc/323:20:263
1642399720,70cyclictest0-21swapper/121:06:331
84602640,4sleep2321ktimersoftd/222:15:162
1642499636,17cyclictest0-21swapper/200:15:242
1642599629,27cyclictest9368-21latency_hist21:10:013
16424995811,12cyclictest22194-21kernelversion23:50:202
16422995829,19cyclictest9-21ksoftirqd/021:40:130
254402560,3sleep20-21swapper/221:40:302
1642499560,17cyclictest29214-21irqrtprio19:35:202
1642499560,16cyclictest4724-21grep21:00:132
1642499550,19cyclictest20342-21sed23:45:272
1642499550,16cyclictest25992-21egrep19:30:122
168732540,1sleep00-21swapper/022:30:250
16424995413,9cyclictest8783-21awk21:05:292
1642499540,17cyclictest4426-21grep23:15:142
139391530,1ptp4l391rcuc/319:28:563
1642499520,18cyclictest4681-21mailstats19:50:262
26912490,2sleep10-21swapper/123:10:181
1642499490,13cyclictest3536-21sed22:05:142
96932480,2sleep30-21swapper/321:10:143
1642499480,17cyclictest0-21swapper/220:30:242
1642599476,24cyclictest449-21dbus-daemon23:02:133
1642499470,12cyclictest32002-21sed00:10:212
1642499460,15cyclictest9909-21perl21:10:152
16425994539,3cyclictest7727-21cron22:15:003
139391450,1ptp4l1294-21hddtemp_smartct22:00:163
1642599443,25cyclictest11472-21latency_hist23:30:003
1642499440,16cyclictest12332-21perl21:15:152
1642499439,12cyclictest19140-21timerandwakeup20:20:262
1642499430,8cyclictest17627-21meminfo21:25:202
16425994222,17cyclictest41-21ksoftirqd/300:05:113
1642499420,7cyclictest21153-21memory22:40:222
1642499420,15cyclictest12414-21iostat_ios23:30:192
139391420,0ptp4l401ktimersoftd/319:40:373
16424994112,17cyclictest28815-21sort22:55:292
1642499410,18cyclictest11113-21awk00:35:182
1642499410,17cyclictest24645-21ls23:55:192
139391410,0ptp4l401ktimersoftd/320:50:013
1642599390,25cyclictest16773-21df_abs19:10:133
1642499390,7cyclictest30823-21apt-get21:55:122
16423993933,3cyclictest18644-21cron23:45:001
139391390,1ptp4l391rcuc/323:50:223
16425993714,20cyclictest2239-21apt20:55:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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