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2026-06-20 - 18:24

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 Sat Jun 20, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325190922020,2sleep3451irq_work/310:05:413
329304621940,3sleep375-21kworker/3:1+events10:50:293
3070847997563,9cyclictest3074769-21ntpq07:10:340
3070847997057,10cyclictest3292120-21kworker/u8:2+flush-8:011:50:300
31578132690,6sleep30-21swapper/308:35:253
3070852996554,8cyclictest3251362-21ntpq10:05:341
3070852996554,8cyclictest3241480-21ntpq09:55:341
3070852996457,5cyclictest3281971-21latency_hist10:40:001
3070847996254,5cyclictest3182487-21apt-get09:00:210
3070847996151,7cyclictest3306992-21apt-get11:05:000
3070852996048,8cyclictest3306984-21latency_hist11:05:011
3070852996046,10cyclictest1704890-21systemd-journal08:30:251
3070852996046,10cyclictest1704890-21systemd-journal08:30:251
3070847996051,6cyclictest3345961-21kworker/u8:0+flush-8:012:15:360
3070847995951,6cyclictest3051140-21kworker/u8:3+flush-8:007:55:350
3070847995949,8cyclictest3400506-21ntpq12:35:330
3070856995852,4cyclictest3301899-21gpgv11:00:002
3070847995849,7cyclictest3326153-21ntpq11:20:320
3070847995847,8cyclictest3212408-21latency_hist09:30:010
3070847995548,5cyclictest3112654-21kworker/u8:0+flush-8:008:15:270
3070847995548,5cyclictest3112654-21kworker/u8:0+flush-8:008:15:270
3070847995543,9cyclictest3327566-21diskstats11:25:250
3070847995444,7cyclictest3147055-21latency_hist08:25:000
3070847995345,6cyclictest3242409-21latency_hist10:00:010
3070847995342,9cyclictest3246502-21ntpq10:00:340
3070852995241,9cyclictest3091647-21ntpq07:25:331
3070847995246,4cyclictest3267165-21kworker/u8:0+events_unbound10:45:270
3070847995246,4cyclictest3087849-21kworker/u8:0+flush-8:007:30:360
3070847995244,5cyclictest3197329-21latency_hist09:15:020
3070847995241,8cyclictest3362191-21diskstats12:00:250
3070852995144,5cyclictest3296836-21latency_hist10:55:001
3070852995141,8cyclictest3276218-21ntpq10:30:381
3070847995043,5cyclictest3301442-21kworker/u8:1+events_unbound11:40:390
3070847995041,6cyclictest3281044-21ntpq10:35:330
3070852994941,5cyclictest3102496-21latency_hist07:40:011
3070856994844,3cyclictest3172113-21apt-get08:50:012
3070852994842,4cyclictest3112654-21kworker/u8:0+flush-8:009:10:361
3070847994841,5cyclictest3271167-21ntpq10:25:350
3070856994740,5cyclictest3212814-21base6409:30:022
3070856994540,4cyclictest3096909-21kworker/u8:1+flush-8:007:40:402
3070852994536,7cyclictest3117659-21apt-get07:55:201
3070847994536,6cyclictest3351762-21latency_hist11:50:010
3070852994437,5cyclictest3287219-21apt-get10:45:201
3070852994433,8cyclictest1704890-21systemd-journal09:45:241
3070847994437,5cyclictest3187168-21kworker/u8:2+flush-8:009:35:430
3070847994436,6cyclictest3166266-21ntpq08:40:360
3070847994435,6cyclictest3376467-21latency_hist12:15:000
3070847994338,4cyclictest3051140-21kworker/u8:3+events_unbound08:10:400
3070847994338,4cyclictest3051140-21kworker/u8:3+events_unbound08:10:390
3070847994337,5cyclictest3221711-21kworker/u8:0+flush-8:009:40:360
3070847994335,6cyclictest3078280-21kworker/u8:4+flush-8:008:05:430
3070847994334,7cyclictest3312444-21/usr/sbin/munin11:10:390
30658222434,34sleep10-21swapper/107:05:021
3070847994238,3cyclictest3187168-21kworker/u8:2+events_unbound09:30:410
3070847994232,8cyclictest1704890-21systemd-journal07:25:000
3070856994136,4cyclictest3078280-21kworker/u8:4+flush-8:007:20:312
3070852994132,6cyclictest3082638-21latency_hist07:20:011
3070847994136,3cyclictest3112654-21kworker/u8:0+events_unbound08:50:020
3070847994135,4cyclictest3078280-21kworker/u8:4+flush-8:007:50:370
3070852994029,9cyclictest3106601-21ntpq07:40:361
3070847994036,3cyclictest3345961-21kworker/u8:0+events_unbound12:20:390
3070847994034,4cyclictest3096909-21kworker/u8:1+flush-8:007:35:250
3070856993931,6cyclictest3152035-21apt-get08:30:002
3070852993930,7cyclictest3345961-21kworker/u8:0+flush-8:012:20:311
3070847993934,3cyclictest3051140-21kworker/u8:3+flush-8:008:25:380
3070847993933,4cyclictest3096909-21kworker/u8:1+events_unbound07:45:410
3070847993929,7cyclictest3371516-21latency_hist12:10:010
3070852993831,5cyclictest3237677-21kworker/u8:1+flush-8:010:40:421
3070852993830,6cyclictest3297085-21/usr/sbin/munin10:55:391
3070852993830,5cyclictest1704890-21systemd-journal08:25:251
3070852993826,8cyclictest1704890-21systemd-journal11:27:251
3070847993834,3cyclictest3301442-21kworker/u8:1+events_unbound11:35:370
3070847993834,3cyclictest3187168-21kworker/u8:2+events_unbound09:20:380
3070847993832,4cyclictest3051140-21kworker/u8:3+events_unbound08:00:260
3070847993831,5cyclictest3207679-21kworker/u8:3+events_unbound10:20:410
3070847993830,6cyclictest3322076-21latency_hist11:20:010
3070847993829,6cyclictest3232490-21latency_hist09:50:020
3070852993732,3cyclictest3342141-21apt-get11:40:201
3070852993728,7cyclictest3132479-21apt-get08:10:211
3070852993728,7cyclictest3132479-21apt-get08:10:201
3070847993733,3cyclictest3207679-21kworker/u8:3+flush-8:010:30:250
3070847993732,4cyclictest3051140-21kworker/u8:3+events_unbound07:15:350
3070847993731,4cyclictest3147282-21kworker/u8:1+events_unbound08:30:260
3070847993731,4cyclictest3147282-21kworker/u8:1+events_unbound08:30:250
3070847993730,5cyclictest3147282-21kworker/u8:1+flush-8:008:45:370
3070847993729,6cyclictest3391751-21/usr/sbin/munin12:30:310
3070847993727,7cyclictest3361650-21latency_hist12:00:010
30660832373,6sleep20-21swapper/207:05:232
3070852993626,7cyclictest3147282-21kworker/u8:1+flush-8:009:00:361
3070847993632,2cyclictest3292120-21kworker/u8:2+events_unbound11:05:240
3070847993630,4cyclictest3345961-21kworker/u8:0+events_unbound12:25:330
3070847993630,4cyclictest3112654-21kworker/u8:0+events_unbound08:35:380
3070847993629,5cyclictest3237448-21latency_hist09:55:020
307084799361,32cyclictest3192190-21munin-run09:10:000
3070856993530,4cyclictest3112654-21kworker/u8:0+flush-8:008:20:252
3070847993531,3cyclictest3312215-21kworker/u8:3+events_unbound11:30:370
3070847993530,3cyclictest3112654-21kworker/u8:0+events_unbound08:55:240
3070856993427,5cyclictest3292120-21kworker/u8:2+events_unbound10:50:212
3070852993427,5cyclictest1704890-21systemd-journal10:29:251
3070852993427,5cyclictest1704890-21systemd-journal08:43:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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