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2026-08-17 - 20:52

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 Mon Aug 17, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
297079623710,3sleep3575-21kworker/3:2-events07:47:413
293355599207201,4cyclictest3183637-21apt-get11:20:042
322442521920,2sleep3575-21kworker/3:2+events12:02:423
293355099119114,3cyclictest0-21swapper/111:20:031
29335459910994,13cyclictest0-21swapper/011:20:030
32577802880,1chrt3257781-21/usr/sbin/munin12:32:571
29384582700,4sleep00-21swapper/007:15:000
2933545996153,5cyclictest3074612-21latency_hist09:30:010
2933550995646,7cyclictest2970337-21latency_hist07:45:011
2933550995550,3cyclictest2901704-21kworker/u8:0+flush-8:007:15:051
2933550995546,6cyclictest3228628-21latency_hist12:05:001
30111272540,4sleep00-21swapper/008:27:470
31148292530,3chrt3114834-21cpuspeed_turbos10:12:422
31148292530,3chrt3114834-21cpuspeed_turbos10:12:422
2933550995137,9cyclictest275-21systemd-journal09:18:061
2933545995141,8cyclictest2945998-21/usr/sbin/munin07:22:570
2933545994944,4cyclictest3149260-21kworker/u8:1+events_unbound10:57:420
2933545994940,7cyclictest3118346-21ntpq10:12:510
2933545994940,7cyclictest3118346-21ntpq10:12:510
31499152480,2sleep3451irq_work/310:47:463
2933550994739,6cyclictest3208147-21ntpq11:42:501
2933550994738,7cyclictest275-21systemd-journal08:42:471
2933545994741,4cyclictest2928507-21kworker/u8:3+flush-8:007:57:440
2933545994739,6cyclictest3183639-21latency_hist11:20:010
29461832440,5sleep30-21swapper/307:22:413
2933545994435,7cyclictest3119541-21/usr/sbin/munin10:17:530
2933545994435,7cyclictest3119541-21/usr/sbin/munin10:17:530
2933545994435,6cyclictest3020019-21latency_hist08:35:010
2933550994336,5cyclictest3178700-21latency_hist11:15:011
2933545994233,6cyclictest3238493-21latency_hist12:15:000
32121022410,6sleep20-21swapper/211:47:482
2933550994135,5cyclictest3010276-21kworker/u8:0+flush-8:010:27:531
2933550994133,5cyclictest3094347-21latency_hist09:50:011
2933545994131,8cyclictest3055522-21diskstats09:12:410
2933550994034,4cyclictest3059760-21latency_hist09:15:011
2933550994033,5cyclictest3234009-21apt-get12:12:391
2933550994033,5cyclictest3060020-21kworker/u8:3+flush-8:010:58:001
2933550994029,8cyclictest275-21systemd-journal08:03:061
2933545994034,4cyclictest2955823-21kworker/u8:1+flush-8:008:07:490
2933555993935,3cyclictest2955823-21kworker/u8:1+events_unbound08:58:012
2933555993935,3cyclictest2955823-21kworker/u8:1+events_unbound08:25:022
2933550993829,7cyclictest3005531-21/usr/sbin/munin08:22:571
2933555993733,3cyclictest2037181-21kworker/u8:2+events_unbound07:25:032
2933545993730,5cyclictest3149476-21apt-get10:47:400
293354599372,30cyclictest3010956-21kworker/0:3+events08:35:340
30681982360,6sleep00-21swapper/009:22:490
2933550993630,4cyclictest3010276-21kworker/u8:0+flush-8:009:40:001
2933550993627,7cyclictest2965391-21latency_hist07:40:021
2933545993629,5cyclictest2975248-21latency_hist07:50:010
2933545993628,6cyclictest3243852-21/usr/sbin/munin12:22:570
293354599362,32cyclictest3248400-21kworker/0:2+events12:29:360
293354599362,30cyclictest3010956-21kworker/0:3+events08:51:480
293354599362,29cyclictest3194062-21kworker/0:0+events11:51:580
293354599362,29cyclictest3168828-21kworker/0:1+events11:06:300
293354599362,28cyclictest3010956-21kworker/0:3+events08:45:220
293354599361,30cyclictest3194062-21kworker/0:0+events11:45:340
293354599361,30cyclictest2923624-21kworker/0:0+events08:02:280
293354599360,30cyclictest3248400-21kworker/0:2+events12:35:340
29322632360,30sleep0201rcuc/007:07:490
2933550993527,6cyclictest275-21systemd-journal12:15:071
293354599352,29cyclictest3010956-21kworker/0:3+events09:00:380
293354599351,32cyclictest3010956-21kworker/0:3+events08:57:280
2933555993430,3cyclictest3060020-21kworker/u8:3+events_unbound10:43:012
2933555993424,3cyclictest2928507-21kworker/u8:3+events_unbound07:33:022
2933550993427,5cyclictest3248365-21latency_hist12:25:011
2933550993425,7cyclictest3134147-21kworker/u8:2+events_unbound11:27:511
2933550993425,7cyclictest2994285-21ntpq08:07:531
2933545993429,3cyclictest3144070-21turbostat.cron10:40:000
293354599342,30cyclictest3248400-21kworker/0:2+events12:33:460
293354599342,26cyclictest3010956-21kworker/0:3+events10:42:060
293354599342,26cyclictest2923624-21kworker/0:0+events08:10:140
293354599341,31cyclictest3010956-21kworker/0:3+events10:08:040
293354599341,29cyclictest3010956-21kworker/0:3+events10:20:200
293354599341,28cyclictest3168828-21kworker/0:1+events11:31:310
293354599341,28cyclictest3010956-21kworker/0:3+events08:40:280
293354599341,27cyclictest2923624-21kworker/0:0+events08:15:080
293354599341,27cyclictest2923624-21kworker/0:0+events08:15:080
30145402330,2sleep3575-21kworker/3:2+events08:27:583
2933550993328,4cyclictest3188880-21kworker/u8:0+events_unbound11:50:001
2933550993327,5cyclictest2955823-21kworker/u8:1+flush-8:008:12:531
2933550993327,4cyclictest3134367-21apt-get10:32:381
2933545993327,4cyclictest3183408-21kworker/u8:3+flush-8:011:57:430
293354599332,30cyclictest3168828-21kworker/0:1+events11:26:200
293354599332,30cyclictest3010956-21kworker/0:3+events10:28:140
293354599332,29cyclictest3194062-21kworker/0:0+events11:38:160
2933545993322,9cyclictest275-21systemd-journal09:10:000
293354599332,26cyclictest3168828-21kworker/0:1+events11:10:140
293354599331,31cyclictest3010956-21kworker/0:3+events09:48:540
293354599331,26cyclictest3010956-21kworker/0:3+events09:50:140
293354599330,31cyclictest3010956-21kworker/0:3+events10:54:340
2933550993227,3cyclictest3140281-21irqrtprio10:37:481
2933550993224,6cyclictest2955861-21/usr/sbin/munin07:32:541
293354599329,21cyclictest3194062-21kworker/0:0+events12:07:280
293354599329,21cyclictest3194062-21kworker/0:0+events12:07:280
293354599322,29cyclictest2923624-21kworker/0:0+events07:44:580
293354599322,26cyclictest3194062-21kworker/0:0+events11:40:040
293354599321,30cyclictest3010956-21kworker/0:3+events09:44:440
293354599321,30cyclictest3010956-21kworker/0:3+events09:36:060
293354599321,30cyclictest3010956-21kworker/0:3+events09:30:360
293354599321,30cyclictest2923624-21kworker/0:0+events07:29:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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