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2025-08-26 - 16:30

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Tue Aug 26, 2025 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811310,0rcu_preempt19-21ksoftirqd/111:49:061
10050840,0irq/346-4848400111rcuc/009:40:320
10050780,0irq/346-4848400111rcuc/010:15:040
81760,0rcu_preempt3-21ksoftirqd/011:50:060
10050760,0irq/346-4848400111rcuc/010:16:290
81750,0rcu_preempt3-21ksoftirqd/011:09:430
10050750,0irq/346-4848400111rcuc/009:59:160
10050740,0irq/346-484840041ktimersoftd/012:06:580
81730,0rcu_preempt19-21ksoftirqd/111:45:081
81730,0rcu_preempt19-21ksoftirqd/109:41:301
81730,0rcu_preempt19-21ksoftirqd/109:31:111
81730,0rcu_preempt13595-21ssh09:19:241
81720,0rcu_preempt3-21ksoftirqd/012:26:170
81720,0rcu_preempt3-21ksoftirqd/009:45:540
81720,0rcu_preempt19-21ksoftirqd/107:21:261
81710,0rcu_preempt3-21ksoftirqd/012:16:140
81710,0rcu_preempt19-21ksoftirqd/110:06:571
81710,0rcu_preempt19-21ksoftirqd/109:06:351
10050710,0irq/346-484840041ktimersoftd/012:21:280
81700,0rcu_preempt3-21ksoftirqd/011:58:100
81700,0rcu_preempt3-21ksoftirqd/010:35:300
81700,0rcu_preempt19-21ksoftirqd/111:11:201
81690,0rcu_preempt19-21ksoftirqd/112:21:561
81690,0rcu_preempt19-21ksoftirqd/109:30:511
81680,0rcu_preempt19-21ksoftirqd/110:30:251
81670,0rcu_preempt19-21ksoftirqd/112:20:101
81660,0rcu_preempt3-21ksoftirqd/009:11:240
2842999661,0cyclictest30766-1kworker/0:1H11:51:190
81650,0rcu_preempt3-21ksoftirqd/009:28:290
2842999652,0cyclictest218972sleep010:56:170
81640,0rcu_preempt19-21ksoftirqd/111:22:361
2842999642,0cyclictest0-21swapper/010:06:170
81630,0rcu_preempt19-21ksoftirqd/110:44:151
81630,0rcu_preempt19-21ksoftirqd/109:51:391
2842999634,0cyclictest0-21swapper/011:30:440
81620,0rcu_preempt19-21ksoftirqd/110:31:271
2842999622,0cyclictest0-21swapper/010:41:550
10050620,0irq/346-4848400986-1kworker/1:1H11:28:081
81610,0rcu_preempt3-21ksoftirqd/008:06:140
81610,0rcu_preempt3-21ksoftirqd/008:06:140
81610,0rcu_preempt19-21ksoftirqd/112:31:151
81610,0rcu_preempt19-21ksoftirqd/112:26:481
2842999612,0cyclictest0-21swapper/011:31:210
10050610,0irq/346-484840023395-1kworker/1:0H10:16:401
81600,0rcu_preempt19-21ksoftirqd/109:13:411
81600,0rcu_preempt19-21ksoftirqd/108:11:211
2842999606,0cyclictest0-21swapper/009:08:330
2842999602,0cyclictest25865-21sh09:36:010
10050600,0irq/346-484840022497-1kworker/1:2H11:39:341
81590,0rcu_preempt19-21ksoftirqd/110:51:351
81590,0rcu_preempt19-21ksoftirqd/110:39:491
81590,0rcu_preempt19-21ksoftirqd/109:38:371
10050590,0irq/346-484840054-21kswapd011:19:021
10050590,0irq/346-484840054-21kswapd011:19:021
2842999581,0cyclictest0-21swapper/011:38:090
2842999577,0cyclictest18885-1kworker/0:0H08:17:490
10050570,0irq/346-4848400466-1kworker/1:2H11:51:231
10050570,0irq/346-484840029481-1kworker/1:2H11:07:091
10050570,0irq/346-484840014629-1kworker/1:1H12:11:381
10050570,0irq/346-484840012279-1kworker/1:0H10:50:561
81560,0rcu_preempt19-21ksoftirqd/109:23:381
10050560,0irq/346-48484003312-1kworker/0:3H09:52:290
10050560,0irq/346-484840023691-1kworker/1:0H10:58:551
81550,0rcu_preempt3-21ksoftirqd/011:11:140
81550,0rcu_preempt3-21ksoftirqd/010:01:280
81550,0rcu_preempt3-21ksoftirqd/009:48:130
81550,0rcu_preempt24100-21apt-get08:31:120
2842999551,0cyclictest31716-21ping07:16:160
2842999551,0cyclictest31716-21ping07:16:160
10050550,0irq/346-484840054-21kswapd011:57:291
10050550,0irq/346-484840019428-1kworker/1:1H11:05:221
81540,0rcu_preempt3-21ksoftirqd/008:41:190
2842999542,0cyclictest0-21swapper/007:26:210
10050540,0irq/346-484840017723-1kworker/1:0H11:32:341
81530,0rcu_preempt3-21ksoftirqd/011:01:300
81530,0rcu_preempt1361-21runrttasks12:04:271
10050530,0irq/346-484840010753-1kworker/1:1H09:59:071
10050520,0irq/346-484840054-21kswapd010:15:431
81510,0rcu_preempt3-21ksoftirqd/012:31:190
81510,0rcu_preempt3-21ksoftirqd/008:05:230
81510,0rcu_preempt3-21ksoftirqd/007:56:250
81510,0rcu_preempt3-21ksoftirqd/007:47:110
81510,0rcu_preempt19-21ksoftirqd/112:06:251
81510,0rcu_preempt19-21ksoftirqd/108:37:531
81510,0rcu_preempt19-21ksoftirqd/107:31:451
81510,0rcu_preempt1793-21diskstats09:01:220
10050510,0irq/346-48484000-21swapper/010:46:230
81500,0rcu_preempt6483-21apt-get10:36:130
81500,0rcu_preempt3-21ksoftirqd/012:15:290
81500,0rcu_preempt3-21ksoftirqd/010:26:270
81500,0rcu_preempt3-21ksoftirqd/009:21:270
81500,0rcu_preempt29042-21munin-node0
81500,0rcu_preempt19-21ksoftirqd/108:06:211
81500,0rcu_preempt19-21ksoftirqd/108:06:211
81500,0rcu_preempt12947-21ssh09:18:100
10050500,0irq/346-484840054-21kswapd012:04:350
10050500,0irq/346-484840054-21kswapd011:45:310
10050500,0irq/346-484840054-21kswapd010:25:460
10050500,0irq/346-484840028279-1kworker/1:2H10:23:461
81490,0rcu_preempt3-21ksoftirqd/008:36:240
81490,0rcu_preempt31716-21ping07:31:140
81490,0rcu_preempt19-21ksoftirqd/107:57:571
10050490,0irq/346-484840054-21kswapd011:18:350
10050490,0irq/346-484840054-21kswapd011:18:350
10050490,0irq/346-484840054-21kswapd010:53:010
10050490,0irq/346-484840016103-21ssh10:05:531
81480,0rcu_preempt3-21ksoftirqd/007:51:210
81480,0rcu_preempt19-21ksoftirqd/108:21:191
81480,0rcu_preempt19-21ksoftirqd/108:01:161
81470,0rcu_preempt3-21ksoftirqd/008:15:400
81470,0rcu_preempt19-21ksoftirqd/108:26:121
81470,0rcu_preempt12107-21ping08:21:110
81460,0rcu_preempt3-21ksoftirqd/007:04:020
81460,0rcu_preempt19-21ksoftirqd/108:16:251
81460,0rcu_preempt19-21ksoftirqd/107:54:281
81460,0rcu_preempt19-21ksoftirqd/107:36:111
81460,0rcu_preempt19-21ksoftirqd/107:30:251
2842999464,0cyclictest31716-21ping07:41:150
10050460,0irq/346-484840054-21kswapd011:25:410
10050460,0irq/346-48484004643-21ssh09:50:461
81450,0rcu_preempt3-21ksoftirqd/007:06:280
81450,0rcu_preempt19-21ksoftirqd/107:16:241
81450,0rcu_preempt19-21ksoftirqd/107:16:241
81440,0rcu_preempt3-21ksoftirqd/008:56:170
81440,0rcu_preempt3-21ksoftirqd/008:51:220
81440,0rcu_preempt3-21ksoftirqd/008:51:220
81440,0rcu_preempt3-21ksoftirqd/008:26:230
81440,0rcu_preempt19-21ksoftirqd/107:41:161
81430,0rcu_preempt19-21ksoftirqd/109:00:471
81420,0rcu_preempt30039-21kworker/0:007:23:420
81420,0rcu_preempt19-21ksoftirqd/108:41:021
81410,0rcu_preempt3-21ksoftirqd/007:15:480
81410,0rcu_preempt19-21ksoftirqd/107:16:021
81400,0rcu_preempt19-21ksoftirqd/109:01:191
81400,0rcu_preempt19-21ksoftirqd/107:46:241
81400,0rcu_preempt19-21ksoftirqd/107:09:361
81390,0rcu_preempt27508-21meminfo07:01:251
81390,0rcu_preempt19-21ksoftirqd/108:48:041
81390,0rcu_preempt19-21ksoftirqd/108:35:411
81380,0rcu_preempt19-21ksoftirqd/108:53:021
81380,0rcu_preempt19-21ksoftirqd/108:53:021
81370,0rcu_preempt3-21ksoftirqd/007:36:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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