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2026-06-03 - 01:22

OSADL QA Farm on Real-time of Mainline Linux

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

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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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
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackaslot5s.osadl.org (updated Tue Jun 02, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811510,0rcu_preempt29888-21kworker/1:112:23:561
811460,0rcu_preempt19-21ksoftirqd/109:53:051
811370,0rcu_preempt19-21ksoftirqd/112:31:351
811330,0rcu_preempt19-21ksoftirqd/111:38:031
811290,0rcu_preempt19-21ksoftirqd/110:01:491
811150,0rcu_preempt54-21kswapd011:07:551
811110,0rcu_preempt19-21ksoftirqd/110:30:381
811080,0rcu_preempt851-21rngd11:32:561
811050,0rcu_preempt851-21rngd10:52:061
811050,0rcu_preempt19-21ksoftirqd/111:53:091
811050,0rcu_preempt19-21ksoftirqd/111:53:091
811030,0rcu_preempt19-21ksoftirqd/111:03:091
811030,0rcu_preempt19-21ksoftirqd/111:03:091
81980,0rcu_preempt19-21ksoftirqd/108:03:001
81950,0rcu_preempt19-21ksoftirqd/107:31:011
81840,0rcu_preempt19-21ksoftirqd/109:47:531
81840,0rcu_preempt19-21ksoftirqd/109:47:531
10050770,0irq/346-484840054-21kswapd010:32:580
10050760,0irq/346-484840054-21kswapd012:13:380
81750,0rcu_preempt19-21ksoftirqd/110:38:011
10050750,0irq/346-484840020673-1kworker/0:0H12:23:060
81740,0rcu_preempt54-21kswapd011:13:071
81740,0rcu_preempt19-21ksoftirqd/110:02:551
81730,0rcu_preempt54-21kswapd011:22:580
81730,0rcu_preempt54-21kswapd011:20:131
9950720,0irq/345-4848400111rcuc/010:59:130
81720,0rcu_preempt19-21ksoftirqd/111:32:171
81710,0rcu_preempt19-21ksoftirqd/110:08:131
10050700,0irq/346-484840031966-1kworker/0:3H09:22:010
10050670,0irq/346-4848400111rcuc/010:22:390
81660,0rcu_preempt851-21rngd12:00:380
81650,0rcu_preempt19-21ksoftirqd/112:17:161
81640,0rcu_preempt3-21ksoftirqd/009:12:240
81640,0rcu_preempt19-21ksoftirqd/112:05:511
81640,0rcu_preempt19-21ksoftirqd/112:05:511
81640,0rcu_preempt19-21ksoftirqd/111:47:441
81640,0rcu_preempt19-21ksoftirqd/110:26:171
81640,0rcu_preempt19-21ksoftirqd/109:09:211
1715499641,0cyclictest535-21runrttasks09:16:200
81630,0rcu_preempt19-21ksoftirqd/112:37:441
81620,0rcu_preempt19-21ksoftirqd/110:19:191
1715499622,0cyclictest19342-21ssh09:34:520
1715499622,0cyclictest0-21swapper/011:20:490
1715499622,0cyclictest0-21swapper/010:30:270
81610,0rcu_preempt3-21ksoftirqd/011:34:370
1715499612,0cyclictest21019-21runrttasks10:08:560
1715499612,0cyclictest0-21swapper/009:48:120
1715499612,0cyclictest0-21swapper/009:48:120
1715499611,0cyclictest18791-21munin-node0
81600,0rcu_preempt54-21kswapd009:45:531
1715499603,0cyclictest0-21swapper/010:38:090
81590,0rcu_preempt3-21ksoftirqd/012:07:470
1715499594,0cyclictest0-21swapper/011:48:070
1715499593,0cyclictest0-21swapper/012:05:400
1715499593,0cyclictest0-21swapper/012:05:400
1715499593,0cyclictest0-21swapper/010:26:130
1715499592,0cyclictest4756-21cat09:53:030
1715499592,0cyclictest0-21swapper/009:45:340
1715499591,0cyclictest10559-21chrt11:03:280
1715499591,0cyclictest10559-21chrt11:03:280
1715499583,0cyclictest0-21swapper/011:30:450
1715499582,0cyclictest26191-21ssh10:14:110
1715499582,0cyclictest20432-21ping07:27:560
17154995815,0cyclictest0-21swapper/009:32:050
17154995813,0cyclictest0-21swapper/010:03:010
1715499572,0cyclictest20599-21runrttasks08:55:110
1715499572,0cyclictest0-21swapper/011:39:050
17154995713,0cyclictest32349-21awk10:53:080
17154995713,0cyclictest27174-21munin-node0
17154995713,0cyclictest27174-21munin-node0
81560,0rcu_preempt19-21ksoftirqd/110:53:111
1715499562,0cyclictest20432-21ping07:47:560
1715499562,0cyclictest20432-21ping07:47:560
1715499562,0cyclictest20432-21ping07:42:550
1715499562,0cyclictest0-21swapper/012:32:590
1715499562,0cyclictest0-21swapper/010:47:390
17154995612,0cyclictest0-21swapper/010:49:190
1715499553,0cyclictest22086-21idleruntime-cro07:22:430
1715499553,0cyclictest0-21swapper/011:09:170
1715499552,0cyclictest2401-21ping08:22:020
1715499552,0cyclictest20432-21ping07:22:550
1715499552,0cyclictest0-21swapper/011:46:270
1715499552,0cyclictest0-21swapper/011:16:490
17154995515,0cyclictest0-21swapper/009:22:510
17154995514,0cyclictest0-21swapper/009:40:250
1715499542,0cyclictest20432-21ping07:37:570
1715499542,0cyclictest20432-21ping07:33:150
17154995417,0cyclictest0-21swapper/008:13:140
81530,0rcu_preempt31075-1kworker/1:1H11:25:201
81530,0rcu_preempt19-21ksoftirqd/109:02:551
1715499532,0cyclictest0-21swapper/008:26:140
1715499512,0cyclictest0-21swapper/007:53:050
1715499511,0cyclictest0-21swapper/009:59:100
81500,0rcu_preempt19-21ksoftirqd/109:38:071
81500,0rcu_preempt19-21ksoftirqd/109:32:551
1715499507,0cyclictest3-21ksoftirqd/009:02:420
1715499502,0cyclictest0-21swapper/008:08:100
81490,0rcu_preempt13320-21runrttasks08:33:041
9950480,0irq/345-484840019-21ksoftirqd/108:28:011
81480,0rcu_preempt4130-21kworker/0:008:05:580
17154994810,0cyclictest0-21swapper/012:29:150
81460,0rcu_preempt3-21ksoftirqd/008:28:300
81460,0rcu_preempt2466-21kworker/0:108:00:570
81460,0rcu_preempt19-21ksoftirqd/112:08:031
81460,0rcu_preempt19-21ksoftirqd/110:58:081
81450,0rcu_preempt12546-21meminfo09:28:061
81440,0rcu_preempt3-21ksoftirqd/008:48:120
81440,0rcu_preempt3-21ksoftirqd/007:02:540
81440,0rcu_preempt19-21ksoftirqd/107:19:131
10050440,0irq/346-4848400851-21rngd09:27:261
9950430,0irq/345-484840022227-21munin-node1
81430,0rcu_preempt3-21ksoftirqd/009:04:070
81430,0rcu_preempt26328-21seq10:47:431
10050430,0irq/346-484840011763-21munin-node1
81420,0rcu_preempt19-21ksoftirqd/111:52:121
81420,0rcu_preempt19-21ksoftirqd/110:13:051
81420,0rcu_preempt19-21ksoftirqd/109:18:051
81420,0rcu_preempt19-21ksoftirqd/107:03:051
81410,0rcu_preempt6808-21sort08:13:081
81410,0rcu_preempt3-21ksoftirqd/008:33:110
81410,0rcu_preempt3-21ksoftirqd/007:09:160
81410,0rcu_preempt2677-21ssh12:01:481
81410,0rcu_preempt19-21ksoftirqd/112:18:041
81410,0rcu_preempt19-21ksoftirqd/108:08:111
81410,0rcu_preempt19-21ksoftirqd/107:38:131
81400,0rcu_preempt19-21ksoftirqd/108:00:341
81400,0rcu_preempt19-21ksoftirqd/107:46:151
81400,0rcu_preempt19-21ksoftirqd/107:34:121
81400,0rcu_preempt0-21swapper/107:13:021
4350400,0irq/32-4330000029629-21ssh09:12:591
81390,0rcu_preempt3-21ksoftirqd/008:39:320
81390,0rcu_preempt21689-21ntp_states08:58:081
81390,0rcu_preempt19-21ksoftirqd/108:48:061
81390,0rcu_preempt19-21ksoftirqd/108:22:471
81390,0rcu_preempt19-21ksoftirqd/108:19:101
81380,0rcu_preempt19-21ksoftirqd/108:53:081
81380,0rcu_preempt19-21ksoftirqd/108:43:091
81380,0rcu_preempt19-21ksoftirqd/107:53:061
81380,0rcu_preempt19-21ksoftirqd/107:47:531
81380,0rcu_preempt19-21ksoftirqd/107:47:531
81380,0rcu_preempt14637-21df_inode08:37:591
10050380,0irq/346-48484000-21swapper/008:44:550
81370,0rcu_preempt3-21ksoftirqd/007:13:180
81370,0rcu_preempt19-21ksoftirqd/107:08:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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