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2026-06-18 - 22:46

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Thu Jun 18, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811210,0rcu_preempt3-21ksoftirqd/010:55:120
811100,0rcu_preempt3-21ksoftirqd/010:32:470
811080,0rcu_preempt3-21ksoftirqd/012:09:340
811020,0rcu_preempt0-21swapper/007:52:530
811010,0rcu_preempt3-21ksoftirqd/011:52:360
811010,0rcu_preempt3-21ksoftirqd/009:41:170
811000,0rcu_preempt3-21ksoftirqd/009:42:530
81980,0rcu_preempt3-21ksoftirqd/011:48:510
81970,0rcu_preempt3-21ksoftirqd/009:50:530
81960,0rcu_preempt54-21kswapd010:58:010
81900,0rcu_preempt3-21ksoftirqd/010:12:500
81850,0rcu_preempt3-21ksoftirqd/011:44:130
81830,0rcu_preempt3-21ksoftirqd/012:12:570
81760,0rcu_preempt3-21ksoftirqd/012:02:490
81760,0rcu_preempt3-21ksoftirqd/011:37:450
81740,0rcu_preempt19-21ksoftirqd/110:27:381
81730,0rcu_preempt1339-21snmpd09:27:390
81720,0rcu_preempt3-21ksoftirqd/009:21:280
81670,0rcu_preempt19-21ksoftirqd/111:37:391
81670,0rcu_preempt0-21swapper/009:14:500
81660,0rcu_preempt3-21ksoftirqd/011:27:490
81660,0rcu_preempt3-21ksoftirqd/008:47:390
81660,0rcu_preempt3-21ksoftirqd/008:02:560
81660,0rcu_preempt0-21swapper/007:37:020
81650,0rcu_preempt851-21rngd09:37:270
81650,0rcu_preempt19-21ksoftirqd/108:22:511
81640,0rcu_preempt851-21rngd08:37:400
81640,0rcu_preempt3-21ksoftirqd/012:29:250
81640,0rcu_preempt3-21ksoftirqd/009:52:580
81640,0rcu_preempt3-21ksoftirqd/009:09:590
81640,0rcu_preempt3-21ksoftirqd/008:12:530
10050640,0irq/346-484840031285-1kworker/1:2H10:56:111
81630,0rcu_preempt3-21ksoftirqd/011:57:460
81630,0rcu_preempt3-21ksoftirqd/007:12:380
81630,0rcu_preempt3-21ksoftirqd/007:12:380
81630,0rcu_preempt3166-21kworker/0:110:11:330
10050630,0irq/346-484840054-21kswapd009:40:221
10050630,0irq/346-48484003873-1kworker/1:2H09:55:501
81620,0rcu_preempt851-21rngd11:14:250
81620,0rcu_preempt3-21ksoftirqd/010:32:180
81620,0rcu_preempt21541-21diskmemload09:20:461
10050620,0irq/346-48484008890-1kworker/1:3H10:00:451
10050620,0irq/346-484840026431-1kworker/1:1H11:56:001
10050620,0irq/346-484840018935-1kworker/1:2H12:21:451
81610,0rcu_preempt3-21ksoftirqd/010:40:210
81610,0rcu_preempt3-21ksoftirqd/008:52:440
10050610,0irq/346-484840028842-1kworker/1:2H09:14:061
81600,0rcu_preempt6607-21ssh11:02:400
81600,0rcu_preempt3-21ksoftirqd/008:17:390
10050600,0irq/346-484840013839-1kworker/1:0H11:10:051
81590,0rcu_preempt3-21ksoftirqd/007:59:300
10050590,0irq/346-484840031430-1kworker/1:3H12:01:171
10050590,0irq/346-484840023935-1kworker/1:1H12:24:391
10050590,0irq/346-484840018849-1kworker/1:1H11:18:521
10050590,0irq/346-484840016357-1kworker/1:1H09:36:141
81580,0rcu_preempt3-21ksoftirqd/011:33:110
81580,0rcu_preempt3-21ksoftirqd/008:57:440
81580,0rcu_preempt19-21ksoftirqd/112:07:391
81580,0rcu_preempt19-21ksoftirqd/109:12:131
10050580,0irq/346-484840054-21kswapd012:07:011
10050580,0irq/346-48484001441-1kworker/1:1H09:22:381
10050580,0irq/346-484840011382-1kworker/1:3H10:37:481
81570,0rcu_preempt3-21ksoftirqd/012:32:500
81570,0rcu_preempt3-21ksoftirqd/010:02:420
81570,0rcu_preempt3-21ksoftirqd/008:45:280
81570,0rcu_preempt19-21ksoftirqd/109:29:291
10050570,0irq/346-484840023819-1kworker/1:1H10:16:341
81560,0rcu_preempt3-21ksoftirqd/010:42:410
81560,0rcu_preempt3-21ksoftirqd/010:22:460
81550,0rcu_preempt3-21ksoftirqd/012:21:230
81550,0rcu_preempt29570-21ssh10:20:100
81550,0rcu_preempt20053-21apt-get09:02:380
81550,0rcu_preempt19-21ksoftirqd/108:03:591
10050550,0irq/346-484840028914-1kworker/1:2H12:32:241
10050550,0irq/346-484840028873-1kworker/1:1H11:26:411
10050550,0irq/346-484840023819-1kworker/1:1H10:19:011
10050550,0irq/346-484840016346-1kworker/1:2H10:43:381
10050550,0irq/346-484840012586-21kworker/1:007:14:341
10050550,0irq/346-484840012586-21kworker/1:007:14:341
81540,0rcu_preempt3-21ksoftirqd/011:19:470
81540,0rcu_preempt3-21ksoftirqd/011:08:130
81540,0rcu_preempt3-21ksoftirqd/010:01:370
81540,0rcu_preempt3-21ksoftirqd/009:22:510
81540,0rcu_preempt19-21ksoftirqd/110:47:461
10050540,0irq/346-48484008857-1kworker/1:1H11:06:471
10050540,0irq/346-484840054-21kswapd011:37:131
10050540,0irq/346-484840054-21kswapd011:26:180
10050540,0irq/346-484840054-21kswapd010:47:410
10050540,0irq/346-484840028873-1kworker/1:1H11:32:151
10050540,0irq/346-484840018849-1kworker/1:1H11:14:521
10050540,0irq/346-4848400181ktimersoftd/110:09:211
10050540,0irq/346-48484001381-1kworker/1:1H10:26:421
81530,0rcu_preempt3-21ksoftirqd/008:26:450
81530,0rcu_preempt3-21ksoftirqd/007:07:410
81530,0rcu_preempt28469-21ntpq07:47:520
81530,0rcu_preempt19-21ksoftirqd/108:47:491
10050530,0irq/346-484840031294-1kworker/1:0H09:50:231
10050530,0irq/346-484840026296-1kworker/1:1H10:58:211
10050530,0irq/346-484840017996-21ssh11:46:241
81520,0rcu_preempt8723-21runrttasks08:27:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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