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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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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 Mar 31, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811060,0rcu_preempt3-21ksoftirqd/009:47:290
811030,0rcu_preempt19-21ksoftirqd/111:14:051
811010,0rcu_preempt19-21ksoftirqd/110:08:521
81930,0rcu_preempt54-21kswapd011:32:511
81900,0rcu_preempt19-21ksoftirqd/111:57:561
81900,0rcu_preempt19-21ksoftirqd/111:47:421
81900,0rcu_preempt19-21ksoftirqd/110:03:081
81900,0rcu_preempt19-21ksoftirqd/109:28:341
81860,0rcu_preempt19-21ksoftirqd/111:01:491
81860,0rcu_preempt19-21ksoftirqd/109:58:131
81820,0rcu_preempt19-21ksoftirqd/109:49:411
81800,0rcu_preempt18282-1kworker/0:0H11:14:070
81790,0rcu_preempt19-21ksoftirqd/111:36:171
81770,0rcu_preempt0-21swapper/111:43:271
81760,0rcu_preempt0-21swapper/112:12:091
81750,0rcu_preempt4911-21ssh10:57:281
81750,0rcu_preempt4911-21ssh10:57:281
81750,0rcu_preempt0-21swapper/110:27:151
81740,0rcu_preempt19-21ksoftirqd/110:52:521
81740,0rcu_preempt18526-21ssh10:05:341
81730,0rcu_preempt19-21ksoftirqd/107:19:141
81720,0rcu_preempt19-21ksoftirqd/112:02:401
81720,0rcu_preempt19-21ksoftirqd/109:22:261
81720,0rcu_preempt19-21ksoftirqd/108:53:581
81720,0rcu_preempt0-21swapper/110:33:251
81710,0rcu_preempt19-21ksoftirqd/109:41:041
81710,0rcu_preempt19-21ksoftirqd/109:09:261
81700,0rcu_preempt54-21kswapd009:38:371
81690,0rcu_preempt19-21ksoftirqd/111:12:361
81690,0rcu_preempt19-21ksoftirqd/110:39:471
81680,0rcu_preempt19-21ksoftirqd/112:05:361
81670,0rcu_preempt3-21ksoftirqd/010:03:520
81670,0rcu_preempt19-21ksoftirqd/112:28:121
81670,0rcu_preempt19-21ksoftirqd/112:18:391
81670,0rcu_preempt19-21ksoftirqd/109:17:001
81670,0rcu_preempt19-21ksoftirqd/108:18:441
81670,0rcu_preempt0-21swapper/011:07:110
10050660,0irq/346-484840030732-1kworker/0:2H10:52:180
81650,0rcu_preempt19-21ksoftirqd/112:34:211
81640,0rcu_preempt19-21ksoftirqd/108:49:071
81630,0rcu_preempt19-21ksoftirqd/111:28:021
81630,0rcu_preempt19-21ksoftirqd/110:23:101
81620,0rcu_preempt19-21ksoftirqd/110:33:521
81610,0rcu_preempt19-21ksoftirqd/108:23:581
1933799612,0cyclictest0-21swapper/009:38:230
81600,0rcu_preempt19-21ksoftirqd/112:21:421
81600,0rcu_preempt19-21ksoftirqd/108:44:101
81590,0rcu_preempt19-21ksoftirqd/112:28:551
81580,0rcu_preempt3567-21kworker/1:211:52:241
81570,0rcu_preempt19-21ksoftirqd/107:54:011
81570,0rcu_preempt11154-21apt-get11:03:551
81560,0rcu_preempt19-21ksoftirqd/110:46:321
81550,0rcu_preempt3567-21kworker/1:207:33:471
81550,0rcu_preempt26228-21ssh10:13:571
10050550,0irq/346-48484003311-1kworker/0:1H10:59:360
81540,0rcu_preempt19-21ksoftirqd/108:23:051
10050540,0irq/346-48484000-21swapper/010:09:470
81530,0rcu_preempt19-21ksoftirqd/108:09:101
10050530,0irq/346-48484000-21swapper/010:54:070
10050530,0irq/346-48484000-21swapper/010:54:070
81520,0rcu_preempt19-21ksoftirqd/108:07:181
81510,0rcu_preempt32614-21kworker/0:209:55:530
81510,0rcu_preempt19-21ksoftirqd/111:18:571
81510,0rcu_preempt19-21ksoftirqd/109:44:021
81510,0rcu_preempt19-21ksoftirqd/109:04:041
81510,0rcu_preempt19-21ksoftirqd/108:39:061
81510,0rcu_preempt19-21ksoftirqd/107:49:031
81510,0rcu_preempt19-21ksoftirqd/107:24:441
1933799515,0cyclictest0-21swapper/007:18:530
10050510,0irq/346-484840019336-21cyclictest11:47:350
81500,0rcu_preempt3-21ksoftirqd/011:36:580
81500,0rcu_preempt3018-21kworker/0:207:59:140
81500,0rcu_preempt23589-21kworker/0:109:40:330
81500,0rcu_preempt19-21ksoftirqd/107:14:021
9950490,0irq/345-48484000-21swapper/012:32:080
81490,0rcu_preempt3-21ksoftirqd/009:19:030
81490,0rcu_preempt19-21ksoftirqd/107:59:011
81490,0rcu_preempt15985-1kworker/0:0H09:30:280
81480,0rcu_preempt54-21kswapd012:07:280
81480,0rcu_preempt3567-21kworker/1:209:29:261
81480,0rcu_preempt3-21ksoftirqd/011:27:400
81480,0rcu_preempt3-21ksoftirqd/008:49:360
81480,0rcu_preempt3-21ksoftirqd/008:16:580
81480,0rcu_preempt26323-21diskmemload10:38:450
81480,0rcu_preempt14384-21kworker/0:207:39:040
9950470,0irq/345-48484000-21swapper/007:53:550
81470,0rcu_preempt3-21ksoftirqd/011:59:140
81470,0rcu_preempt3-21ksoftirqd/010:37:120
81470,0rcu_preempt3-21ksoftirqd/008:36:120
81470,0rcu_preempt28688-21ssh11:21:050
81470,0rcu_preempt19336-21cyclictest07:44:041
81460,0rcu_preempt3-21ksoftirqd/012:20:410
81460,0rcu_preempt3-21ksoftirqd/011:55:590
81460,0rcu_preempt3-21ksoftirqd/011:50:150
81460,0rcu_preempt3-21ksoftirqd/011:29:130
81460,0rcu_preempt3-21ksoftirqd/009:53:440
81460,0rcu_preempt19-21ksoftirqd/108:58:591
81450,0rcu_preempt3-21ksoftirqd/011:08:550
81450,0rcu_preempt3-21ksoftirqd/010:03:320
81450,0rcu_preempt3-21ksoftirqd/009:02:480
81450,0rcu_preempt3000-21ping08:04:020
81450,0rcu_preempt19695-21diskstats07:08:591
81450,0rcu_preempt19-21ksoftirqd/107:41:391
81450,0rcu_preempt19-21ksoftirqd/107:29:171
81450,0rcu_preempt19-21ksoftirqd/107:29:171
81450,0rcu_preempt19-21ksoftirqd/107:08:441
9950440,0irq/345-48484000-21swapper/010:20:000
81440,0rcu_preempt3-21ksoftirqd/010:26:020
81440,0rcu_preempt3-21ksoftirqd/009:14:270
81440,0rcu_preempt3-21ksoftirqd/009:13:080
81440,0rcu_preempt3-21ksoftirqd/007:50:480
81440,0rcu_preempt3-21ksoftirqd/007:48:100
81440,0rcu_preempt19-21ksoftirqd/108:29:131
81430,0rcu_preempt3567-21kworker/1:208:33:591
81430,0rcu_preempt3-21ksoftirqd/012:28:190
81430,0rcu_preempt3-21ksoftirqd/012:09:100
81430,0rcu_preempt3-21ksoftirqd/011:42:140
81430,0rcu_preempt3-21ksoftirqd/010:44:510
81430,0rcu_preempt3-21ksoftirqd/008:45:470
81430,0rcu_preempt3-21ksoftirqd/008:19:090
81430,0rcu_preempt3-21ksoftirqd/007:04:090
81430,0rcu_preempt16631-21apt-get08:38:550
81420,0rcu_preempt3-21ksoftirqd/008:33:360
81420,0rcu_preempt3-21ksoftirqd/007:13:380
81410,0rcu_preempt3-21ksoftirqd/012:35:370
81410,0rcu_preempt3-21ksoftirqd/010:32:030
81410,0rcu_preempt3-21ksoftirqd/010:14:050
81410,0rcu_preempt3-21ksoftirqd/009:24:470
81410,0rcu_preempt3-21ksoftirqd/008:09:140
81410,0rcu_preempt3-21ksoftirqd/007:18:190
81400,0rcu_preempt54-21kswapd008:25:190
81400,0rcu_preempt3-21ksoftirqd/012:18:170
81400,0rcu_preempt3-21ksoftirqd/009:04:110
81380,0rcu_preempt3-21ksoftirqd/008:57:430
81360,0rcu_preempt3-21ksoftirqd/007:29:140
81360,0rcu_preempt3-21ksoftirqd/007:29:140
81350,0rcu_preempt3-21ksoftirqd/007:34:010
81320,0rcu_preempt22617-21ping07:23:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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