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2025-12-01 - 05:35
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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 Sun Nov 30, 2025 12:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40585019912111206,3cyclictest20062-21apache_accesses09:40:050
40582942215186,19sleep30-21swapper/307:09:593
40582942215186,19sleep30-21swapper/307:09:583
40581822208184,14sleep10-21swapper/107:08:321
40581822208184,14sleep10-21swapper/107:08:311
40581172208184,14sleep20-21swapper/207:07:452
40581172208184,14sleep20-21swapper/207:07:452
40582472203180,13sleep00-21swapper/007:09:220
40582472203180,13sleep00-21swapper/007:09:220
4058501997368,4cyclictest247515-21ThreadPoolForeg10:05:240
4058504997154,14cyclictest4157520-21snmp_ryswitch.c08:45:012
4058504996762,3cyclictest35185-21latency_hist09:55:022
4058507996157,3cyclictest56308-21kworker/u8:3+flush-179:010:40:303
405850799615,55cyclictest4031426-21kworker/u8:4+efi_rts_wq07:46:583
4058507996148,12cyclictest4130057-21kworker/u8:0+flush-179:008:26:493
2008642610,1chrt200855-21snmp_areswitch.12:35:040
4058502996056,2cyclictest4130057-21kworker/u8:0+flush-179:009:45:001
4058502996055,4cyclictest4031426-21kworker/u8:4+flush-179:007:20:361
4058502996055,4cyclictest4031426-21kworker/u8:4+flush-179:007:20:361
4058502996045,2cyclictest4157533-21ThreadPoolForeg08:45:021
4058507995956,2cyclictest148094-21kworker/u8:0+flush-179:012:10:083
4058501995954,4cyclictest247561-21ThreadPoolForeg10:00:310
4058502995854,3cyclictest4074652-21kworker/u8:1+events_unbound08:00:011
4058507995652,3cyclictest184692-21kworker/u8:1+events_unbound12:35:183
4058507995638,3cyclictest4100353-21kworker/u8:3+flush-179:008:00:153
4058502995651,4cyclictest29705-21kworker/u8:1+flush-179:010:00:311
4058504995551,3cyclictest76405-21systemd-journal07:30:282
1957652550,1chrt195618-21/usr/share/muni12:30:030
4058507995450,3cyclictest4156760-21kworker/u8:4+events_unbound09:20:293
4058507995450,3cyclictest4047794-21kworker/u8:3+events_unbound07:30:333
4058504995444,9cyclictest4172951-21/usr/share/muni09:00:152
4058502995451,2cyclictest127996-21kworker/u8:0+events_unbound11:30:161
405850199544,50cyclictest4031426-21kworker/u8:4+efi_rts_wq07:46:590
4058507995350,2cyclictest39256-21kworker/u8:2+flush-179:010:00:213
4058507995349,3cyclictest148094-21kworker/u8:0+events_unbound12:17:023
4058507995347,4cyclictest87006-21kworker/u8:0+flush-179:011:12:313
4058502995342,10cyclictest4130057-21kworker/u8:0+flush-179:008:50:331
4058501995347,5cyclictest4193122-21latency_hist09:20:010
4058502995248,3cyclictest102627-21kworker/u8:1+flush-179:011:20:011
4058502995247,3cyclictest127996-21kworker/u8:0+flush-179:011:25:201
4058502995246,4cyclictest3125725-21ThreadPoolForeg11:39:461
4058507995147,3cyclictest4156760-21kworker/u8:4+events_unbound09:50:123
4058507995147,3cyclictest4100353-21kworker/u8:3+flush-179:007:55:003
4058507995147,3cyclictest4094932-21kworker/u8:2+flush-179:008:17:023
4058507995147,3cyclictest14137-21kworker/u8:3+events_unbound09:35:213
4058504995139,11cyclictest3125724-21ThreadPoolForeg10:20:152
4058504995139,11cyclictest3125724-21ThreadPoolForeg10:20:152
4058502995148,2cyclictest14137-21kworker/u8:3+flush-179:009:35:271
4058502995147,3cyclictest4192457-21kworker/u8:1+flush-179:009:20:041
4058502995147,3cyclictest4074652-21kworker/u8:1+events_unbound08:05:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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