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2026-03-15 - 12:04

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun Mar 15, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811240,0rcu_preempt3-21ksoftirqd/000:19:260
811140,0rcu_preempt3-21ksoftirqd/022:21:500
811070,0rcu_preempt3-21ksoftirqd/022:05:390
811020,0rcu_preempt3-21ksoftirqd/019:49:180
81970,0rcu_preempt3-21ksoftirqd/023:10:180
81960,0rcu_preempt3-21ksoftirqd/023:21:590
81960,0rcu_preempt19-21ksoftirqd/123:19:201
81860,0rcu_preempt3-21ksoftirqd/021:46:540
81770,0rcu_preempt851-21rngd00:09:131
81770,0rcu_preempt851-21rngd00:09:131
81770,0rcu_preempt3-21ksoftirqd/023:54:240
81770,0rcu_preempt3-21ksoftirqd/022:59:500
81770,0rcu_preempt3-21ksoftirqd/022:59:500
81760,0rcu_preempt19-21ksoftirqd/123:49:011
81740,0rcu_preempt54-21kswapd020:01:260
81740,0rcu_preempt3-21ksoftirqd/020:19:090
81730,0rcu_preempt3-21ksoftirqd/022:13:510
81730,0rcu_preempt19-21ksoftirqd/123:08:591
81720,0rcu_preempt3-21ksoftirqd/022:24:160
81720,0rcu_preempt3-21ksoftirqd/022:01:050
81720,0rcu_preempt3-21ksoftirqd/021:12:570
81710,0rcu_preempt3-21ksoftirqd/021:49:380
81700,0rcu_preempt3-21ksoftirqd/023:18:580
81700,0rcu_preempt3-21ksoftirqd/022:37:510
81690,0rcu_preempt19884-21ssh22:44:550
81680,0rcu_preempt3-21ksoftirqd/000:30:110
81670,0rcu_preempt3-21ksoftirqd/023:59:130
81670,0rcu_preempt3-21ksoftirqd/022:16:150
81670,0rcu_preempt3-21ksoftirqd/021:26:130
81670,0rcu_preempt3-21ksoftirqd/021:21:000
81670,0rcu_preempt3-21ksoftirqd/020:06:230
81670,0rcu_preempt19-21ksoftirqd/121:44:211
81670,0rcu_preempt19-21ksoftirqd/121:24:141
81660,0rcu_preempt3-21ksoftirqd/022:39:260
81650,0rcu_preempt1350-21lldpd23:31:330
81640,0rcu_preempt27946-21ntpq21:14:250
81630,0rcu_preempt19-21ksoftirqd/122:15:411
81630,0rcu_preempt12445-21df_abs20:39:130
81620,0rcu_preempt54-21kswapd023:12:181
81620,0rcu_preempt23264-21ssh00:27:461
81620,0rcu_preempt19-21ksoftirqd/121:54:251
81610,0rcu_preempt3-21ksoftirqd/020:59:110
81600,0rcu_preempt19-21ksoftirqd/123:39:301
10050600,0irq/346-48484009252-1kworker/1:2H22:02:281
10050600,0irq/346-4848400707-1kworker/1:0H22:26:151
81580,0rcu_preempt3-21ksoftirqd/022:54:140
81580,0rcu_preempt19-21ksoftirqd/122:13:191
10050580,0irq/346-484840032310-1kworker/1:0H23:33:561
81570,0rcu_preempt3-21ksoftirqd/020:29:230
81570,0rcu_preempt3-21ksoftirqd/000:34:170
81570,0rcu_preempt3-21ksoftirqd/000:24:120
81570,0rcu_preempt31144-21ping20:24:180
81570,0rcu_preempt25359-21kworker/0:122:52:180
81570,0rcu_preempt25359-21kworker/0:122:52:180
81570,0rcu_preempt17781-21ssh23:49:180
81570,0rcu_preempt16264-21ps20:49:230
10050570,0irq/346-48484009252-1kworker/1:2H22:07:261
10050570,0irq/346-484840029479-1kworker/1:2H00:02:531
10050570,0irq/346-484840025298-1kworker/1:0H22:50:471
10050570,0irq/346-484840025298-1kworker/1:0H22:50:471
81560,0rcu_preempt19-21ksoftirqd/122:19:141
81560,0rcu_preempt19-21ksoftirqd/121:49:271
81560,0rcu_preempt19-21ksoftirqd/121:42:131
81560,0rcu_preempt19-21ksoftirqd/120:04:221
10050560,0irq/346-484840026730-1kworker/1:3H00:33:361
10050560,0irq/346-48484001550-1kworker/1:1H21:20:581
81550,0rcu_preempt3-21ksoftirqd/021:29:150
81550,0rcu_preempt19-21ksoftirqd/123:26:491
81550,0rcu_preempt19-21ksoftirqd/119:44:241
81540,0rcu_preempt3-21ksoftirqd/023:24:150
81540,0rcu_preempt3-21ksoftirqd/022:32:250
81540,0rcu_preempt3-21ksoftirqd/019:54:090
81540,0rcu_preempt19-21ksoftirqd/122:58:561
81540,0rcu_preempt19-21ksoftirqd/121:18:171
10050540,0irq/346-484840054-21kswapd023:37:171
10050540,0irq/346-484840054-21kswapd022:40:231
10050540,0irq/346-484840054-21kswapd000:08:571
10050540,0irq/346-484840017536-1kworker/1:2H23:18:301
10050540,0irq/346-484840015473-1kworker/1:3H22:45:311
81530,0rcu_preempt3789-21kworker/0:120:18:150
81530,0rcu_preempt3-21ksoftirqd/021:39:190
81530,0rcu_preempt3-21ksoftirqd/019:14:200
81530,0rcu_preempt19-21ksoftirqd/121:30:371
81530,0rcu_preempt19-21ksoftirqd/119:20:191
1508399536,0cyclictest11367-1kworker/1:1H21:34:271
10050530,0irq/346-484840020383-1kworker/1:2H23:00:351
10050530,0irq/346-484840020383-1kworker/1:2H23:00:351
10050530,0irq/346-484840019608-1kworker/1:0H23:54:251
10050530,0irq/346-4848400111rcuc/021:34:420
81520,0rcu_preempt3-21ksoftirqd/023:39:180
81520,0rcu_preempt3-21ksoftirqd/023:08:000
81520,0rcu_preempt3-21ksoftirqd/021:54:200
81520,0rcu_preempt3-21ksoftirqd/021:04:220
81520,0rcu_preempt3-21ksoftirqd/021:04:220
81520,0rcu_preempt3-21ksoftirqd/020:54:180
81520,0rcu_preempt3-21ksoftirqd/000:14:110
81520,0rcu_preempt19-21ksoftirqd/122:36:011
81520,0rcu_preempt19-21ksoftirqd/119:36:001
81520,0rcu_preempt16267-21users19:09:270
13250520,0irq/301-480200012697-21sh23:44:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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