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2026-08-30 - 08:12

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 Aug 30, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81950,0rcu_preempt23744-1kworker/1:0H21:22:551
81940,0rcu_preempt19-21ksoftirqd/122:00:081
81930,0rcu_preempt21762-21ssh22:57:391
81920,0rcu_preempt19-21ksoftirqd/123:00:461
81920,0rcu_preempt19-21ksoftirqd/123:00:461
81920,0rcu_preempt19-21ksoftirqd/122:49:371
81920,0rcu_preempt19-21ksoftirqd/121:30:441
81910,0rcu_preempt19-21ksoftirqd/122:27:501
81900,0rcu_preempt54-21kswapd000:05:141
81900,0rcu_preempt24703-21kworker/1:220:21:461
81900,0rcu_preempt19-21ksoftirqd/123:50:391
81900,0rcu_preempt19-21ksoftirqd/123:08:181
81890,0rcu_preempt19-21ksoftirqd/100:25:001
81880,0rcu_preempt54-21kswapd023:12:371
81880,0rcu_preempt54-21kswapd022:16:281
81880,0rcu_preempt19-21ksoftirqd/123:29:021
81880,0rcu_preempt19-21ksoftirqd/123:15:591
81880,0rcu_preempt19-21ksoftirqd/121:44:531
81880,0rcu_preempt19-21ksoftirqd/121:43:351
81880,0rcu_preempt19-21ksoftirqd/121:09:491
81870,0rcu_preempt54-21kswapd023:22:201
81870,0rcu_preempt19-21ksoftirqd/100:29:391
81860,0rcu_preempt836-21rngd22:11:261
81860,0rcu_preempt54-21kswapd021:37:171
81860,0rcu_preempt19-21ksoftirqd/122:36:401
81860,0rcu_preempt19-21ksoftirqd/100:35:511
81860,0rcu_preempt0-21swapper/123:40:361
81850,0rcu_preempt54-21kswapd022:21:271
81850,0rcu_preempt19-21ksoftirqd/123:55:431
81850,0rcu_preempt19-21ksoftirqd/123:36:311
81820,0rcu_preempt19-21ksoftirqd/123:33:511
81820,0rcu_preempt19-21ksoftirqd/122:32:511
81810,0rcu_preempt19-21ksoftirqd/120:24:521
81810,0rcu_preempt19-21ksoftirqd/100:03:051
81800,0rcu_preempt836-21rngd20:53:421
81800,0rcu_preempt19-21ksoftirqd/122:44:521
81800,0rcu_preempt19-21ksoftirqd/121:15:001
81780,0rcu_preempt30696-1kworker/0:1H23:19:440
81780,0rcu_preempt20841-21ping20:00:261
81770,0rcu_preempt19-21ksoftirqd/123:48:231
81760,0rcu_preempt19-21ksoftirqd/100:20:101
81740,0rcu_preempt19-21ksoftirqd/122:40:481
81740,0rcu_preempt0-21swapper/121:58:321
81740,0rcu_preempt0-21swapper/121:58:321
81720,0rcu_preempt54-21kswapd000:12:331
81720,0rcu_preempt3-21ksoftirqd/023:45:000
81700,0rcu_preempt19-21ksoftirqd/121:29:101
81700,0rcu_preempt11577-21diskmemload21:59:230
81700,0rcu_preempt11577-21diskmemload21:59:230
10050700,0irq/346-484840054-21kswapd022:19:340
81690,0rcu_preempt54-21kswapd022:08:141
10050690,0irq/346-48484003237-1kworker/0:2H23:13:400
81680,0rcu_preempt19-21ksoftirqd/121:51:261
81680,0rcu_preempt19-21ksoftirqd/119:09:301
81670,0rcu_preempt19-21ksoftirqd/100:15:471
10050670,0irq/346-484840030696-1kworker/0:1H23:08:290
10050670,0irq/346-484840023745-1kworker/0:2H21:21:550
81660,0rcu_preempt3-21ksoftirqd/000:25:160
81660,0rcu_preempt0-21swapper/120:34:451
81650,0rcu_preempt19-21ksoftirqd/120:17:381
81640,0rcu_preempt19-21ksoftirqd/120:04:491
81640,0rcu_preempt0-21swapper/000:14:260
10050640,0irq/346-484840028283-1kworker/0:1H22:31:380
10050620,0irq/346-48484003237-1kworker/0:2H23:15:220
81610,0rcu_preempt1185-1kworker/0:1H21:39:350
81610,0rcu_preempt11577-21diskmemload21:29:130
81590,0rcu_preempt3-21ksoftirqd/021:59:420
81590,0rcu_preempt3-21ksoftirqd/020:39:320
81580,0rcu_preempt3-21ksoftirqd/021:32:330
81580,0rcu_preempt19-21ksoftirqd/120:44:541
81560,0rcu_preempt3-21ksoftirqd/019:31:380
81560,0rcu_preempt19-21ksoftirqd/120:39:481
10050560,0irq/346-484840054-21kswapd021:54:110
81550,0rcu_preempt54-21kswapd019:44:581
81550,0rcu_preempt19-21ksoftirqd/120:09:581
81540,0rcu_preempt54-21kswapd021:02:371
81540,0rcu_preempt24703-21kworker/1:219:14:481
81540,0rcu_preempt19-21ksoftirqd/120:54:501
10050540,0irq/346-48484005242-1kworker/0:0H00:23:420
10050540,0irq/346-484840010793-1kworker/0:2H22:47:070
9950530,0irq/345-484840028283-1kworker/0:1H22:36:450
10050530,0irq/346-48484002678-1kworker/0:2H19:04:470
81520,0rcu_preempt19-21ksoftirqd/119:54:531
81520,0rcu_preempt19-21ksoftirqd/119:54:531
81520,0rcu_preempt19-21ksoftirqd/119:20:031
10050520,0irq/346-4848400593-1kworker/0:1H23:41:410
10050520,0irq/346-484840015360-21ssh21:13:000
81510,0rcu_preempt19-21ksoftirqd/119:43:501
10050510,0irq/346-48484006144-1kworker/0:2H21:37:010
10050510,0irq/346-484840030875-1kworker/0:2H22:10:520
10050510,0irq/346-484840025436-1kworker/0:0H00:08:210
10050510,0irq/346-484840015764-1kworker/0:0H22:53:080
81500,0rcu_preempt3-21ksoftirqd/000:30:300
81500,0rcu_preempt19-21ksoftirqd/119:49:491
10050500,0irq/346-4848400836-21rngd22:57:580
10050500,0irq/346-484840030875-1kworker/0:2H22:16:120
10050500,0irq/346-484840025732-1kworker/0:0H23:02:540
10050500,0irq/346-484840025732-1kworker/0:0H23:02:540
9950490,0irq/345-484840016020-1kworker/0:2H21:46:460
81490,0rcu_preempt3-21ksoftirqd/020:09:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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