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2026-09-11 - 12:40

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 Fri Sep 11, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811610,0rcu_preempt3-21ksoftirqd/021:19:470
811400,0rcu_preempt19-21ksoftirqd/120:34:431
811310,0rcu_preempt28141-21ps19:29:471
811260,0rcu_preempt466-21meminfo19:44:441
811260,0rcu_preempt26364-21memory19:24:431
811230,0rcu_preempt24743-21memory19:19:490
811220,0rcu_preempt3-21ksoftirqd/023:04:080
811200,0rcu_preempt29638-21memory19:34:460
811190,0rcu_preempt19-21ksoftirqd/119:20:311
811150,0rcu_preempt3-21ksoftirqd/023:42:350
811100,0rcu_preempt3-21ksoftirqd/021:16:520
811060,0rcu_preempt19-21ksoftirqd/122:29:571
811050,0rcu_preempt3-21ksoftirqd/020:49:460
811040,0rcu_preempt3-21ksoftirqd/023:18:050
811020,0rcu_preempt3-21ksoftirqd/022:44:370
811020,0rcu_preempt3-21ksoftirqd/000:19:480
811020,0rcu_preempt19-21ksoftirqd/122:54:361
81990,0rcu_preempt3-21ksoftirqd/023:19:310
81990,0rcu_preempt3-21ksoftirqd/019:59:490
81990,0rcu_preempt19-21ksoftirqd/123:04:481
81990,0rcu_preempt19-21ksoftirqd/120:54:421
81980,0rcu_preempt19-21ksoftirqd/121:19:481
81950,0rcu_preempt19-21ksoftirqd/121:44:461
81940,0rcu_preempt19-21ksoftirqd/100:04:371
81940,0rcu_preempt0-21swapper/000:29:330
81910,0rcu_preempt18715-21ps20:39:440
81900,0rcu_preempt29929-21munin-run22:49:201
81900,0rcu_preempt19-21ksoftirqd/122:14:461
81900,0rcu_preempt19-21ksoftirqd/120:24:351
81890,0rcu_preempt3-21ksoftirqd/021:51:140
81890,0rcu_preempt19-21ksoftirqd/119:59:471
81870,0rcu_preempt3-21ksoftirqd/022:13:400
81860,0rcu_preempt3-21ksoftirqd/020:34:460
81860,0rcu_preempt29868-21kworker/1:122:39:371
81860,0rcu_preempt19-21ksoftirqd/123:14:311
81860,0rcu_preempt19-21ksoftirqd/119:39:211
81860,0rcu_preempt11128-21ps22:29:450
81850,0rcu_preempt19-21ksoftirqd/121:34:451
81840,0rcu_preempt3-21ksoftirqd/020:24:340
81840,0rcu_preempt19-21ksoftirqd/123:23:431
81840,0rcu_preempt19-21ksoftirqd/121:14:411
81840,0rcu_preempt19-21ksoftirqd/120:59:371
81830,0rcu_preempt3-21ksoftirqd/022:54:400
81830,0rcu_preempt19-21ksoftirqd/123:49:471
81830,0rcu_preempt19-21ksoftirqd/122:59:401
81820,0rcu_preempt3-21ksoftirqd/021:34:350
81820,0rcu_preempt3-21ksoftirqd/000:04:410
81820,0rcu_preempt19-21ksoftirqd/123:44:331
81820,0rcu_preempt19-21ksoftirqd/121:49:411
81820,0rcu_preempt19-21ksoftirqd/100:34:341
81810,0rcu_preempt3-21ksoftirqd/023:04:350
81810,0rcu_preempt19-21ksoftirqd/121:44:051
81800,0rcu_preempt4801-21kworker/u4:123:26:410
81800,0rcu_preempt3-21ksoftirqd/021:54:480
81790,0rcu_preempt19-21ksoftirqd/123:55:431
81780,0rcu_preempt3-21ksoftirqd/022:39:470
81780,0rcu_preempt3-21ksoftirqd/021:31:570
81770,0rcu_preempt3-21ksoftirqd/021:44:310
81770,0rcu_preempt3-21ksoftirqd/000:34:470
81760,0rcu_preempt3-21ksoftirqd/021:39:460
81760,0rcu_preempt24913-1kworker/1:1H23:39:221
81750,0rcu_preempt19-21ksoftirqd/100:29:411
81740,0rcu_preempt3-21ksoftirqd/021:09:430
81730,0rcu_preempt3-21ksoftirqd/023:55:540
81730,0rcu_preempt3-21ksoftirqd/019:14:340
81730,0rcu_preempt19-21ksoftirqd/122:04:331
81720,0rcu_preempt3-21ksoftirqd/023:35:400
81720,0rcu_preempt3-21ksoftirqd/022:52:520
81720,0rcu_preempt3-21ksoftirqd/022:24:360
81720,0rcu_preempt3-21ksoftirqd/021:26:340
81720,0rcu_preempt3-21ksoftirqd/020:14:500
81720,0rcu_preempt3-21ksoftirqd/019:39:440
81720,0rcu_preempt3-21ksoftirqd/000:24:460
81710,0rcu_preempt3-21ksoftirqd/023:11:030
81710,0rcu_preempt19-21ksoftirqd/123:34:351
81700,0rcu_preempt3-21ksoftirqd/023:51:050
81700,0rcu_preempt3-21ksoftirqd/022:19:240
81700,0rcu_preempt3-21ksoftirqd/022:14:540
81700,0rcu_preempt3-21ksoftirqd/019:44:420
81700,0rcu_preempt3-21ksoftirqd/000:01:240
81700,0rcu_preempt23346-21irqstats22:09:411
81700,0rcu_preempt19-21ksoftirqd/123:59:411
81700,0rcu_preempt19-21ksoftirqd/122:19:411
81700,0rcu_preempt19-21ksoftirqd/121:29:451
81700,0rcu_preempt19-21ksoftirqd/100:24:491
81690,0rcu_preempt3-21ksoftirqd/020:59:440
81690,0rcu_preempt19-21ksoftirqd/121:24:471
81690,0rcu_preempt19-21ksoftirqd/120:19:501
81690,0rcu_preempt19-21ksoftirqd/100:13:431
81680,0rcu_preempt3-21ksoftirqd/022:35:030
81680,0rcu_preempt3-21ksoftirqd/021:59:330
81680,0rcu_preempt3-21ksoftirqd/000:16:090
81680,0rcu_preempt3-21ksoftirqd/000:16:090
81680,0rcu_preempt19-21ksoftirqd/119:49:361
81670,0rcu_preempt3-21ksoftirqd/022:05:500
81670,0rcu_preempt3-21ksoftirqd/020:19:360
81670,0rcu_preempt3-21ksoftirqd/019:54:390
81670,0rcu_preempt3-21ksoftirqd/019:54:390
81670,0rcu_preempt3-21ksoftirqd/019:29:490
81670,0rcu_preempt2286-21ps19:49:440
81660,0rcu_preempt3-21ksoftirqd/023:31:290
81660,0rcu_preempt3-21ksoftirqd/020:29:450
81660,0rcu_preempt19-21ksoftirqd/122:03:381
81660,0rcu_preempt19-21ksoftirqd/120:09:321
81650,0rcu_preempt19-21ksoftirqd/119:54:451
81650,0rcu_preempt19-21ksoftirqd/119:54:451
81650,0rcu_preempt19-21ksoftirqd/119:40:431
81640,0rcu_preempt19-21ksoftirqd/122:50:431
81640,0rcu_preempt19-21ksoftirqd/120:39:321
81640,0rcu_preempt19-21ksoftirqd/100:21:481
81640,0rcu_preempt19-21ksoftirqd/100:16:301
81640,0rcu_preempt19-21ksoftirqd/100:16:301
81630,0rcu_preempt3-21ksoftirqd/020:54:200
81630,0rcu_preempt19-21ksoftirqd/123:09:481
81630,0rcu_preempt19-21ksoftirqd/120:44:431
81620,0rcu_preempt4473-21ping20:04:351
81620,0rcu_preempt19-21ksoftirqd/122:26:571
81620,0rcu_preempt19-21ksoftirqd/121:56:551
269652620,0chrt10050irq/346-484840019:26:100
81610,0rcu_preempt3-21ksoftirqd/000:14:190
81610,0rcu_preempt19-21ksoftirqd/121:12:211
81600,0rcu_preempt3-21ksoftirqd/023:46:040
81600,0rcu_preempt19-21ksoftirqd/122:34:591
81600,0rcu_preempt0-21swapper/019:14:190
81590,0rcu_preempt19-21ksoftirqd/119:09:411
81580,0rcu_preempt3-21ksoftirqd/020:04:500
81580,0rcu_preempt19-21ksoftirqd/119:14:381
81570,0rcu_preempt3-21ksoftirqd/020:09:480
81540,0rcu_preempt3-21ksoftirqd/021:04:320
81540,0rcu_preempt19-21ksoftirqd/123:30:211
81540,0rcu_preempt19-21ksoftirqd/123:24:381
81530,0rcu_preempt20348-21ps20:44:440
81520,0rcu_preempt19-21ksoftirqd/120:54:191
81490,0rcu_preempt19-21ksoftirqd/120:14:491
81470,0rcu_preempt3-21ksoftirqd/019:04:520
81470,0rcu_preempt19-21ksoftirqd/121:04:471
81460,0rcu_preempt19-21ksoftirqd/120:29:321
81380,0rcu_preempt19-21ksoftirqd/119:08:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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