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2026-04-19 - 15:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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  Intel
Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Sun Apr 19, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
343544923450,2sleep3481ktimers/312:06:203
335785021320,4chrt75-21kworker/3:1-events10:51:123
3137328996029,21cyclictest3432027-21latency_hist12:05:011
3137332995953,4cyclictest3402197-21kworker/u8:2+events_unbound11:56:262
3137328995944,12cyclictest3273303-21latency_hist09:25:011
3137332995852,4cyclictest3243437-21kworker/u8:2+flush-8:009:41:292
3137332995450,3cyclictest3085761-21kworker/u8:1+events_unbound07:15:052
34404402530,1sleep13440444-21tr12:11:201
3137326995245,5cyclictest3187689-21ntpq07:56:220
3137332995147,3cyclictest3342529-21kworker/u8:0+flush-8:010:51:292
3137332995043,5cyclictest280-21systemd-journal12:35:002
3137326995043,5cyclictest3320908-21kworker/u8:2+events_unbound10:41:230
3137326994842,4cyclictest3085761-21kworker/u8:1+flush-8:009:56:140
3137332994742,4cyclictest3327662-21kworker/u8:1+flush-8:010:26:282
3137332994642,3cyclictest3327662-21kworker/u8:1+events_unbound10:31:272
3137332994642,3cyclictest3085761-21kworker/u8:1+flush-8:008:06:252
3137328994637,6cyclictest3397401-21latency_hist11:30:001
33755962450,4sleep1161rcu_preempt11:06:191
3137326994538,5cyclictest3243437-21kworker/u8:2+flush-8:009:36:150
3137332994439,4cyclictest3085761-21kworker/u8:1+events_unbound09:10:042
3137328994416,14cyclictest3277420-21ntpq09:26:221
3137328994334,6cyclictest280-21systemd-journal07:16:511
3137328994332,8cyclictest3416364-21ntpq11:46:241
3137326994338,4cyclictest3085761-21kworker/u8:1+flush-8:008:11:160
3137326994338,4cyclictest3085761-21kworker/u8:1+flush-8:008:11:160
3137326994336,5cyclictest3085761-21kworker/u8:1+flush-8:008:56:260
3137328994232,8cyclictest3227805-21ntpq08:36:261
3137326994237,3cyclictest3342529-21kworker/u8:0+flush-8:011:36:250
3137326994233,7cyclictest3462173-21/usr/sbin/munin12:36:280
3137332994137,3cyclictest3307943-21kworker/u8:3+flush-8:011:51:252
3137332994136,4cyclictest3307943-21kworker/u8:3+events_unbound11:06:122
3137332994136,4cyclictest3101172-21kworker/u8:0+flush-8:007:41:242
3137332994135,4cyclictest3085761-21kworker/u8:1+events_unbound10:10:052
3137328994134,5cyclictest3228979-21apt-get08:41:101
3137328994034,4cyclictest3303307-21apt-get09:56:091
3137332993935,3cyclictest3327662-21kworker/u8:1+flush-8:010:21:252
3137328993932,5cyclictest3442182-21/usr/sbin/munin12:16:211
3137326993929,8cyclictest3388122-21diskstats11:21:140
3137326993929,8cyclictest3388122-21diskstats11:21:140
3137332993833,4cyclictest3307943-21kworker/u8:3+flush-8:012:21:322
3137328993832,4cyclictest3422426-21/usr/sbin/munin11:56:281
3137328993828,8cyclictest3331730-21needreboot10:21:211
3137328993828,8cyclictest280-21systemd-journal09:30:371
3137328993811,17cyclictest0-21swapper/111:34:221
3137328993810,17cyclictest0-21swapper/111:02:041
3137328993810,16cyclictest0-21swapper/110:33:421
3137326993832,4cyclictest3307943-21kworker/u8:3+flush-8:011:51:110
3137332993729,6cyclictest280-21systemd-journal10:19:502
3137328993711,17cyclictest0-21swapper/108:06:151
3137326993731,4cyclictest3402197-21kworker/u8:2+flush-8:011:46:290
3137326993728,6cyclictest280-21systemd-journal07:15:010
313732899367,19cyclictest0-21swapper/108:10:571
313732899367,19cyclictest0-21swapper/108:10:561
3137328993629,5cyclictest3357742-21apt-get10:51:101
3137328993626,8cyclictest3461553-21unixbench_singl12:31:301
3137328993625,9cyclictest3267487-21ntpq09:16:211
3137328993624,10cyclictest3436092-21ntpq12:06:231
3137326993631,3cyclictest3357396-21cron10:50:000
3137326993630,4cyclictest3144292-21kworker/u8:2+flush-8:007:26:140
3137326993627,6cyclictest280-21systemd-journal09:10:000
34644312350,1sleep13464436-21cut12:36:201
3137332993531,3cyclictest3085761-21kworker/u8:1+events_unbound08:16:302
313732899355,21cyclictest0-21swapper/111:36:511
3137328993526,7cyclictest3307943-21kworker/u8:3+flush-8:012:26:241
3137328993523,9cyclictest3188924-21apt-get08:01:091
3137328993522,11cyclictest3283531-21apt-get09:36:101
313732899351,28cyclictest3323063-21apt-get10:16:111
313732699351,31cyclictest1-21systemd08:55:010
313732899346,19cyclictest0-21swapper/107:33:051
313732899346,18cyclictest0-21swapper/107:20:411
3137328993427,5cyclictest3258814-21apt-get09:11:091
3137328993427,5cyclictest3167997-21ntpq07:36:221
3137328993423,9cyclictest3350044-21kthreadcore10:41:201
3137326993428,5cyclictest3307943-21kworker/u8:3+flush-8:010:36:230
3137326993428,4cyclictest3243437-21kworker/u8:2+events_unbound09:11:180
3137326993424,7cyclictest3387285-21latency_hist11:20:000
3137332993328,3cyclictest3144292-21kworker/u8:2+events_unbound07:30:202
313732899335,19cyclictest0-21swapper/110:48:191
3137328993324,7cyclictest3421252-21ntpq11:51:231
3137328993321,10cyclictest0-21swapper/110:15:011
3137328993315,11cyclictest0-21swapper/108:31:101
3137326993327,5cyclictest3327662-21kworker/u8:1+flush-8:010:26:230
313732899323,2cyclictest0-21swapper/109:51:111
313732899322,24cyclictest3362698-21apt-get10:56:091
3137328993217,13cyclictest3183621-21cron07:55:001
3137328993215,14cyclictest0-21swapper/111:11:111
3137326993227,4cyclictest3085761-21kworker/u8:1+flush-8:010:01:280
3137326993227,3cyclictest3154002-21systemd-run07:25:010
31370862324,8sleep10-21swapper/107:09:281
3137332993126,4cyclictest3101172-21kworker/u8:0+events_unbound08:01:282
313732899313,5cyclictest0-21swapper/108:46:081
3137328993126,3cyclictest3204269-21cut08:16:141
3137328993125,4cyclictest3342850-21apt-get10:36:101
313732899312,22cyclictest407-21mta-sts-daemon09:46:101
3137328993118,11cyclictest0-21swapper/109:10:011
3137328993118,10cyclictest3213537-21latency_hist08:25:011
3137326993127,3cyclictest3327662-21kworker/u8:1+flush-8:010:31:290
3137326993125,4cyclictest3371429-21ntpq11:01:220
3137326993123,6cyclictest3377725-21apt-get11:11:090
3137332993023,5cyclictest280-21systemd-journal09:20:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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