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2025-08-22 - 00:13
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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 Thu Aug 21, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7715302212171,31sleep20-21swapper/207:09:062
7715092212161,41sleep10-21swapper/107:08:491
7714332208179,19sleep00-21swapper/007:07:510
7713892204176,18sleep30-21swapper/307:07:193
77181999870,55cyclictest994762-21/usr/share/muni10:45:020
77181999870,53cyclictest40658-21ThreadPoolForeg07:45:020
771832998379,2cyclictest871229-21apache_processe08:45:023
10644202650,1sleep20-21swapper/211:50:172
10116652540,1sleep30-21swapper/311:00:103
771828995135,11cyclictest906900-21latency_hist09:20:012
771828995046,3cyclictest1030661-21kworker/u8:2+flush-179:011:40:372
771823994945,3cyclictest1087129-21munin-limits12:10:311
9367512470,1sleep2936752-21ld09:45:262
8247342470,0chrt824730-21snmp_ryswitch2.08:00:003
771823994743,3cyclictest867221-21kworker/u8:1+events_unbound09:15:071
771819994743,3cyclictest1030661-21kworker/u8:2+flush-179:012:05:260
771819994741,5cyclictest40614-21Chrome_ChildIOT09:20:360
771823994640,5cyclictest823803-21python307:55:341
771819994642,3cyclictest766152-21kworker/u8:0+flush-179:008:10:170
771828994541,3cyclictest896726-21/usr/share/muni09:10:102
771828994537,7cyclictest766152-21kworker/u8:0+flush-179:008:25:022
771828994534,5cyclictest1082127-21kworker/2:1+pm12:21:352
771828994532,12cyclictest864804-21kworker/2:1+pm08:57:572
771828994532,12cyclictest864804-21kworker/2:1+pm08:57:572
771819994540,4cyclictest854658-21kworker/u8:3+flush-179:008:45:310
771823994439,4cyclictest771456-21kworker/u8:1+events_unbound07:18:341
771828994336,6cyclictest937598-21kworker/2:0+pm09:59:212
771823994340,2cyclictest912054-21kworker/u8:0+flush-179:009:30:081
771819994331,1cyclictest311855-1kworker/0:1H+kblockd11:56:550
771832994238,2cyclictest40661-13Compositor07:45:143
771828994238,3cyclictest947981-21munin-update10:00:302
771828994237,4cyclictest864804-21kworker/2:1+pm09:20:172
771828994228,9cyclictest979115-21kworker/2:3+pm10:31:392
771828994226,10cyclictest979115-21kworker/2:3+pm12:05:042
771828994223,18cyclictest1260-21snmpd07:58:212
771819994237,4cyclictest1010656-21/usr/share/muni11:00:120
771819994236,4cyclictest803656-21/usr/share/muni07:40:050
771832994136,3cyclictest1030661-21kworker/u8:2+flush-179:012:15:063
771828994137,2cyclictest864804-21kworker/2:1+pm09:25:022
77182899411,12cyclictest0-21swapper/208:51:092
771823994137,3cyclictest1020291-21kworker/u8:4+flush-179:011:15:211
771819994138,2cyclictest1020291-21kworker/u8:4+flush-179:012:10:160
771819994137,2cyclictest829620-21kworker/0:2+pm08:19:510
771828994038,1cyclictest979115-21kworker/2:3+pm10:36:372
771828994038,1cyclictest937598-21kworker/2:0+pm10:07:062
771828994038,1cyclictest829315-21kworker/2:3+pm08:30:352
771828994034,5cyclictest747211-1kworker/2:2H+kblockd11:10:552
77182899401,15cyclictest1057247-21snmp_wanpowerct11:45:022
77182899400,2cyclictest0-21swapper/210:45:062
771823994038,1cyclictest974032-21kworker/1:3+pm11:07:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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