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2025-12-02 - 23:18
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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 rackbslot1.osadl.org (updated Tue Dec 02, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28393342214159,14sleep20-21swapper/207:07:352
28392872204168,26sleep10-21swapper/107:07:011
28395172193150,34sleep00-21swapper/007:09:530
28391712181157,14sleep30-21swapper/307:06:043
301662721500,2sleep03016618-21snmp_ryswitch2.10:00:060
283972999749,64cyclictest3052202-21kworker/u8:1+efi_rts_wq11:10:011
283972999749,64cyclictest3052202-21kworker/u8:1+efi_rts_wq11:10:011
283973099739,63cyclictest3067223-21kworker/u8:3+efi_rts_wq11:10:032
2839729996865,2cyclictest2819620-21kworker/u8:0+events_unbound07:16:061
2839730996645,20cyclictest3155234-21kworker/u8:5+flush-179:012:30:152
2839730996562,2cyclictest3098888-21kworker/u8:0+flush-179:011:55:362
2839730996562,2cyclictest3098888-21kworker/u8:0+flush-179:011:55:362
2839728996460,3cyclictest2922190-21kworker/u8:2+flush-179:010:40:360
2839730996259,2cyclictest2922190-21kworker/u8:2+flush-179:010:50:162
2839730996157,3cyclictest3067223-21kworker/u8:3+flush-179:011:30:372
283972999610,60cyclictest3067223-21kworker/u8:3+efi_rts_wq11:10:031
2839729996056,3cyclictest3126509-21kworker/u8:1+events_unbound12:13:301
2839732995955,2cyclictest3125029-21snmp_wanswitch.11:45:013
2839730995955,3cyclictest3150365-21kworker/u8:2+flush-179:012:10:092
2839730995954,3cyclictest2865571-21kworker/u8:0+flush-179:007:45:272
2839730995752,3cyclictest2922190-21kworker/u8:2+flush-179:009:45:112
2839730995750,5cyclictest3031519-21kworker/u8:0+events_unbound10:15:132
2839732995638,17cyclictest3069522-21apt-get10:50:133
2839730995651,3cyclictest2819620-21kworker/u8:0+flush-179:007:15:202
2839729995651,4cyclictest2986946-21ntpq09:30:141
2839730995550,4cyclictest3000479-21kworker/u8:4+flush-179:010:05:142
2839730995550,4cyclictest2979909-21kworker/u8:3+flush-179:009:35:012
2839730995550,3cyclictest3098888-21kworker/u8:0+events_unbound12:00:332
2839730995538,4cyclictest2922190-21kworker/u8:2+flush-179:008:45:172
2839729995552,2cyclictest3052202-21kworker/u8:1+events_unbound10:45:361
2839730995450,3cyclictest3035993-21kworker/u8:1+flush-179:010:20:382
2839730995350,2cyclictest2819620-21kworker/u8:0+events_unbound07:20:102
2839730995349,3cyclictest2922190-21kworker/u8:2+flush-179:011:45:112
2839730995348,3cyclictest2922190-21kworker/u8:2+flush-179:009:15:142
2839730995348,3cyclictest2922190-21kworker/u8:2+flush-179:009:15:142
2839729995348,4cyclictest3125724-21ThreadPoolForeg12:05:011
2839728995345,5cyclictest3047597-21/usr/share/muni10:30:070
2839728995345,5cyclictest2922190-21kworker/u8:2+flush-179:009:20:010
2839732995248,2cyclictest3001037-21snmp_ryswitch2.09:45:023
2839732995245,5cyclictest2882386-21/usr/share/muni07:50:093
2839730995249,2cyclictest2969723-21kworker/u8:0+flush-179:009:25:572
2839730995249,2cyclictest2922190-21kworker/u8:2+flush-179:008:50:022
2839729995244,7cyclictest247560-21ThreadPoolForeg10:20:191
2839732995135,12cyclictest2406573-1kworker/3:2H+kblockd11:51:493
2839730995147,3cyclictest3126509-21kworker/u8:1+flush-179:012:05:052
2839730995145,4cyclictest2739871-21kworker/u8:2+flush-179:007:30:182
2839729995146,4cyclictest247562-13Chrome_ChildIOT08:25:331
2839730995045,4cyclictest3116722-21kworker/u8:5+flush-179:011:35:282
2839730995045,3cyclictest2958763-21kworker/u8:3+flush-179:009:05:272
2839728995044,4cyclictest2850172-21munin-limits07:16:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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