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2026-07-30 - 09:32

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 Jul 30, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811130,0rcu_preempt3-21ksoftirqd/019:43:490
81960,0rcu_preempt0-21swapper/119:45:211
81950,0rcu_preempt23122-21kworker/1:221:30:421
81950,0rcu_preempt19-21ksoftirqd/123:59:401
81940,0rcu_preempt19-21ksoftirqd/122:57:121
81910,0rcu_preempt19-21ksoftirqd/121:51:461
81880,0rcu_preempt19-21ksoftirqd/121:15:191
81880,0rcu_preempt0-21swapper/123:33:391
81860,0rcu_preempt19-21ksoftirqd/123:04:321
81840,0rcu_preempt19-21ksoftirqd/123:39:001
81790,0rcu_preempt19-21ksoftirqd/122:22:181
81780,0rcu_preempt19-21ksoftirqd/122:35:281
81780,0rcu_preempt19-21ksoftirqd/100:10:151
81740,0rcu_preempt19-21ksoftirqd/123:12:341
81740,0rcu_preempt19-21ksoftirqd/122:41:181
81740,0rcu_preempt19-21ksoftirqd/121:38:011
81740,0rcu_preempt19-21ksoftirqd/119:30:331
81730,0rcu_preempt19-21ksoftirqd/123:07:121
81730,0rcu_preempt19-21ksoftirqd/100:25:231
81730,0rcu_preempt13840-21ssh21:26:141
81730,0rcu_preempt12983-21kworker/1:023:44:191
81720,0rcu_preempt19-21ksoftirqd/122:45:131
81710,0rcu_preempt28187-21munin-run19:30:001
81710,0rcu_preempt19-21ksoftirqd/123:15:231
81710,0rcu_preempt19-21ksoftirqd/123:15:231
81710,0rcu_preempt19-21ksoftirqd/121:57:041
81700,0rcu_preempt28426-21ps21:40:261
81700,0rcu_preempt19-21ksoftirqd/123:26:401
81700,0rcu_preempt19-21ksoftirqd/122:30:521
81700,0rcu_preempt19-21ksoftirqd/120:30:131
81700,0rcu_preempt19-21ksoftirqd/120:05:371
81690,0rcu_preempt9085-21ssh21:21:441
81690,0rcu_preempt19-21ksoftirqd/119:20:301
81690,0rcu_preempt19-21ksoftirqd/119:20:301
81680,0rcu_preempt3-21ksoftirqd/023:46:390
81680,0rcu_preempt23122-21kworker/1:219:40:301
81680,0rcu_preempt19-21ksoftirqd/121:45:171
81680,0rcu_preempt19-21ksoftirqd/121:05:001
81680,0rcu_preempt19-21ksoftirqd/100:20:131
81680,0rcu_preempt19-21ksoftirqd/100:15:141
81680,0rcu_preempt1445-21runrttasks00:32:351
81670,0rcu_preempt3-21ksoftirqd/020:20:160
81670,0rcu_preempt19-21ksoftirqd/120:15:271
81670,0rcu_preempt19-21ksoftirqd/120:10:131
81670,0rcu_preempt19-21ksoftirqd/100:35:591
81660,0rcu_preempt19-21ksoftirqd/123:49:071
81660,0rcu_preempt19-21ksoftirqd/121:05:251
81660,0rcu_preempt19-21ksoftirqd/120:00:301
81660,0rcu_preempt13474-21ssh22:29:211
81660,0rcu_preempt0-21swapper/100:04:431
81650,0rcu_preempt3-21ksoftirqd/023:03:560
81650,0rcu_preempt3-21ksoftirqd/022:54:340
81650,0rcu_preempt3-21ksoftirqd/021:59:270
81650,0rcu_preempt23549-21ssh22:07:131
81650,0rcu_preempt19-21ksoftirqd/122:03:591
81650,0rcu_preempt19-21ksoftirqd/120:40:291
81650,0rcu_preempt19-21ksoftirqd/119:58:221
81640,0rcu_preempt3-21ksoftirqd/022:35:580
81640,0rcu_preempt19-21ksoftirqd/122:14:071
81640,0rcu_preempt0-21swapper/123:21:441
81630,0rcu_preempt19-21ksoftirqd/122:18:021
81620,0rcu_preempt19-21ksoftirqd/122:50:201
81620,0rcu_preempt19-21ksoftirqd/120:46:221
81620,0rcu_preempt19-21ksoftirqd/119:35:141
81610,0rcu_preempt3-21ksoftirqd/023:15:150
81610,0rcu_preempt3-21ksoftirqd/023:15:150
81610,0rcu_preempt23122-21kworker/1:220:50:211
81610,0rcu_preempt19-21ksoftirqd/123:52:231
81610,0rcu_preempt19-21ksoftirqd/120:35:251
81610,0rcu_preempt19-21ksoftirqd/119:50:271
81610,0rcu_preempt19-21ksoftirqd/100:06:431
81610,0rcu_preempt0-21swapper/120:55:231
81610,0rcu_preempt0-21swapper/119:15:171
81600,0rcu_preempt3-21ksoftirqd/023:10:170
81600,0rcu_preempt19-21ksoftirqd/121:12:591
81570,0rcu_preempt19-21ksoftirqd/120:28:571
81570,0rcu_preempt19-21ksoftirqd/120:24:361
10050570,0irq/346-48484000-21swapper/023:06:520
81560,0rcu_preempt3-21ksoftirqd/023:40:140
81550,0rcu_preempt3-21ksoftirqd/019:40:010
10050540,0irq/346-48484008023-1kworker/0:0H00:30:170
9950520,0irq/345-48484000-21swapper/021:31:090
81520,0rcu_preempt3-21ksoftirqd/023:55:140
10050520,0irq/346-48484007133-1kworker/0:2H00:00:170
10050520,0irq/346-484840027120-1kworker/0:3H22:45:280
81510,0rcu_preempt3-21ksoftirqd/020:00:310
10050510,0irq/346-484840028952-21ssh22:44:200
81490,0rcu_preempt3-21ksoftirqd/021:35:130
81490,0rcu_preempt3-21ksoftirqd/020:05:270
10050490,0irq/346-48484003684-21munin-run22:20:000
81480,0rcu_preempt3-21ksoftirqd/022:30:230
9950470,0irq/345-484840017426-1kworker/0:1H00:11:210
81470,0rcu_preempt3-21ksoftirqd/020:35:290
81470,0rcu_preempt3-21ksoftirqd/019:05:210
81470,0rcu_preempt19-21ksoftirqd/119:10:101
10050470,0irq/346-48484003542-1kworker/0:2H23:30:560
10050470,0irq/346-484840018173-1kworker/0:0H22:04:250
81460,0rcu_preempt3-21ksoftirqd/020:10:170
10050460,0irq/346-484840022872-21seq22:06:230
10050460,0irq/346-484840022570-1kworker/0:0H00:24:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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