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2025-09-18 - 05:03
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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 rackbslot1.osadl.org (updated Wed Sep 17, 2025 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31600222218188,20sleep20-21swapper/207:06:362
31600932208184,14sleep30-21swapper/307:07:333
31602102207183,14sleep00-21swapper/007:08:550
31601482201176,14sleep10-21swapper/107:08:101
3160480996154,5cyclictest3440601-21/usr/share/muni11:40:092
316047899615,55cyclictest3306273-21kworker/u8:0+efi_rts_wq09:54:580
3160479995653,2cyclictest3251747-21kworker/u8:1+flush-179:009:05:091
3160478995651,4cyclictest3456368-21/usr/share/muni11:55:090
3160482995549,4cyclictest3404857-21/usr/share/muni11:05:093
3160479995552,2cyclictest3306273-21kworker/u8:0+events_unbound10:05:091
3160482995450,3cyclictest3475993-31munin-html12:10:343
316048299534,47cyclictest3197581-13Chrome_IOThread07:45:023
316048299534,47cyclictest3197581-13Chrome_IOThread07:45:023
3160480995249,2cyclictest3332943-21kworker/u8:4+events_unbound11:05:252
3160479995247,4cyclictest247560-21ThreadPoolForeg12:25:091
3160479995148,2cyclictest3332943-21kworker/u8:4+flush-179:010:45:241
3160479995147,3cyclictest3306273-21kworker/u8:0+events_unbound10:00:001
3160479995045,4cyclictest3394646-21/usr/share/muni10:55:011
3160478995047,2cyclictest2188114-1kworker/0:0H+kblockd11:11:010
3160478995046,3cyclictest3322210-21CacheThread_Blo09:45:010
3160482994946,2cyclictest3332340-21kworker/u8:1+events_unbound09:55:143
3160482994946,2cyclictest3251747-21kworker/u8:1+events_unbound09:03:013
3160482994945,3cyclictest3244256-21kworker/u8:3+events_unbound08:33:073
3160482994944,3cyclictest3265525-21/usr/share/muni08:50:203
3160479994946,2cyclictest3419620-21kworker/u8:0+events_unbound11:35:101
3160479994946,2cyclictest3306273-21kworker/u8:0+flush-179:009:50:291
3160479994945,3cyclictest3291253-21kworker/u8:2+flush-179:009:25:271
3160479994945,3cyclictest3224318-21kworker/u8:2+flush-179:008:11:221
3160482994845,3cyclictest3306273-21kworker/u8:0+events_unbound10:20:363
3160480994845,2cyclictest3306273-21kworker/u8:0+events_unbound10:00:372
3160479994845,3cyclictest3450621-21kworker/u8:2+flush-179:012:20:051
3160482994744,2cyclictest3492010-21kworker/u8:0+events_unbound12:34:343
3160482994744,2cyclictest3403725-21kworker/u8:3+events_unbound11:21:493
3160482994743,3cyclictest3450621-21kworker/u8:2+flush-179:012:25:113
3160480994734,12cyclictest3332073-21kworker/2:0+pm10:50:322
3160479994743,3cyclictest3372431-31munin-html10:30:321
3160482994642,3cyclictest3362689-21kworker/u8:2+events_unbound10:36:103
3160480994640,4cyclictest3160621-21/usr/share/muni07:10:092
3160479994642,3cyclictest3291253-21kworker/u8:2+flush-179:009:35:251
3160479994642,2cyclictest3322141-13chrome09:45:011
3160479994641,4cyclictest3224318-21kworker/u8:2+flush-179:008:25:171
316048099450,2cyclictest247561-21ThreadPoolForeg09:45:012
3160479994542,2cyclictest3306273-21kworker/u8:0+flush-179:010:25:121
3160479994542,2cyclictest2632656-1kworker/1:0H+kblockd07:11:001
3160479994541,3cyclictest3224318-21kworker/u8:2+flush-179:008:15:101
3160479994539,4cyclictest3257049-21apt-get08:40:171
3160482994441,2cyclictest3306273-21kworker/u8:0+events_unbound09:26:323
3160482994441,2cyclictest3224318-21kworker/u8:2+events_unbound08:22:333
3160482994441,2cyclictest3123157-21kworker/u8:2+events_unbound07:39:543
3160482994441,2cyclictest3123157-21kworker/u8:2+events_unbound07:39:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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