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2025-10-31 - 04:50
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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 Oct 30, 2025 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41255182206182,14sleep00-21swapper/007:06:520
41255152206182,14sleep20-21swapper/207:06:492
41257452198171,17sleep10-21swapper/107:09:371
41257372196167,19sleep30-21swapper/307:09:303
4125935996359,3cyclictest57241-21kworker/u8:1+flush-179:010:25:270
412593999626,55cyclictest77699-21kworker/u8:0+efi_rts_wq11:39:002
4125939996053,5cyclictest37170-21/usr/share/muni08:50:152
4125939995952,4cyclictest52087-21latency_hist09:05:002
4125939995551,3cyclictest176136-21cp11:05:012
412593599551,54cyclictest77699-21kworker/u8:0+efi_rts_wq11:38:560
4125941995447,5cyclictest222992-21/usr/share/muni11:50:043
4125939995449,3cyclictest212119-21kworker/u8:1+flush-179:011:40:112
4125939995146,3cyclictest72195-21kworker/u8:3+flush-179:009:35:012
4125939995145,4cyclictest4194130-21/usr/share/muni08:15:142
412593999514,46cyclictest93711-21chrome09:45:022
412593999514,46cyclictest93711-21chrome09:45:022
4125939995126,5cyclictest247561-21ThreadPoolForeg07:10:392
4125935995146,4cyclictest247561-21ThreadPoolForeg08:55:140
4125939995045,3cyclictest154584-21kworker/u8:2+flush-179:011:05:162
4125938995038,11cyclictest113711-31munin-graph10:00:581
4125941994946,2cyclictest77699-21kworker/u8:0+flush-179:011:05:123
4125939994935,13cyclictest226916-21kworker/2:1+pm12:21:462
1959602490,1chrt195959-21munin-limits11:20:341
4125939994745,1cyclictest0-21swapper/210:45:012
4125939994744,2cyclictest15682-21kworker/2:2+pm09:40:162
4125938994744,2cyclictest31170-21kworker/u8:4+flush-179:009:10:331
4125938994743,3cyclictest4178177-21kworker/u8:2+flush-179:008:45:361
412594199465,40cyclictest247557-21chrome10:55:193
4125939994640,4cyclictest4141959-21kworker/u8:4+flush-179:007:40:322
4125938994632,13cyclictest3614178-1kworker/1:1H+kblockd07:33:201
4125935994640,5cyclictest3692710-21apache209:35:030
4125941994541,3cyclictest247561-21ThreadPoolForeg12:10:293
4125941994541,3cyclictest232161-21kworker/u8:0+flush-179:012:05:283
4125939994538,5cyclictest57241-21kworker/u8:1+flush-179:010:15:142
4125939994441,3cyclictest31170-21kworker/u8:4+flush-179:008:55:202
4125939994441,2cyclictest77699-21kworker/u8:0+flush-179:011:30:252
4125939994440,3cyclictest77699-21kworker/u8:0+flush-179:011:15:162
4125939994440,3cyclictest57241-21kworker/u8:1+flush-179:010:05:302
4125939994439,3cyclictest57241-21kworker/u8:1+flush-179:009:20:302
4125938994410,33cyclictest77699-21kworker/u8:0+efi_rts_wq11:38:581
4125935994442,2cyclictest232161-21kworker/u8:0+flush-179:012:00:300
4125941994337,5cyclictest247561-21ThreadPoolForeg10:28:093
4125939994338,4cyclictest227167-31munin-html11:50:362
4125939994338,3cyclictest218496-21ThreadPoolForeg11:45:112
4125938994331,11cyclictest3614178-1kworker/1:1H+kblockd11:41:041
4125938994330,11cyclictest145022-21snmp_ryswitch.c10:35:021
4125939994239,2cyclictest15682-21kworker/2:2+pm09:08:182
4125939994237,4cyclictest123865-21kworker/u8:2+flush-179:010:25:122
4125939994236,5cyclictest151455-21ntpq10:40:152
4125939994236,4cyclictest123865-21kworker/u8:2+events_unbound10:20:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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