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2025-10-22 - 00:12

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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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 Tue Oct 21, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811030,0rcu_preempt815-21rngd09:38:310
81990,0rcu_preempt3-21ksoftirqd/010:36:320
81990,0rcu_preempt3-21ksoftirqd/009:48:270
81990,0rcu_preempt3-21ksoftirqd/009:48:270
81980,0rcu_preempt3-21ksoftirqd/012:09:530
81980,0rcu_preempt14376-21df_abs11:25:190
81970,0rcu_preempt3-21ksoftirqd/011:20:280
81910,0rcu_preempt3-21ksoftirqd/007:55:260
81910,0rcu_preempt3-21ksoftirqd/007:55:260
81820,0rcu_preempt3-21ksoftirqd/012:20:310
81740,0rcu_preempt3-21ksoftirqd/012:25:130
81740,0rcu_preempt3-21ksoftirqd/008:20:120
81730,0rcu_preempt3-21ksoftirqd/011:10:320
81730,0rcu_preempt3-21ksoftirqd/010:57:160
81720,0rcu_preempt3-21ksoftirqd/011:37:120
81720,0rcu_preempt3-21ksoftirqd/009:55:130
81720,0rcu_preempt0-21swapper/010:42:460
81710,0rcu_preempt32256-21apt-get07:15:130
81710,0rcu_preempt3-21ksoftirqd/012:34:190
81710,0rcu_preempt19-21ksoftirqd/112:30:271
81710,0rcu_preempt0-21swapper/009:26:310
81700,0rcu_preempt3-21ksoftirqd/011:50:500
81700,0rcu_preempt0-21swapper/011:46:060
10050700,0irq/346-484840014456-1kworker/1:1H09:29:371
81690,0rcu_preempt3-21ksoftirqd/008:00:310
81690,0rcu_preempt21159-21ssh11:33:470
81680,0rcu_preempt3-21ksoftirqd/012:39:420
81680,0rcu_preempt3-21ksoftirqd/012:18:380
81680,0rcu_preempt3-21ksoftirqd/011:44:580
81680,0rcu_preempt3-21ksoftirqd/009:12:490
81680,0rcu_preempt19-21ksoftirqd/109:58:321
81670,0rcu_preempt3-21ksoftirqd/011:55:200
81660,0rcu_preempt3-21ksoftirqd/010:00:330
81660,0rcu_preempt3-21ksoftirqd/010:00:330
81650,0rcu_preempt3-21ksoftirqd/012:14:080
81650,0rcu_preempt3-21ksoftirqd/011:00:270
81650,0rcu_preempt3-21ksoftirqd/010:49:290
81650,0rcu_preempt3-21ksoftirqd/008:40:320
81650,0rcu_preempt20578-21diskstats10:10:201
81650,0rcu_preempt20195-21ntpq08:15:291
92402640,0chrt10050irq/346-484840007:41:430
92402640,0chrt10050irq/346-484840007:41:430
81630,0rcu_preempt3-21ksoftirqd/009:20:250
81630,0rcu_preempt19-21ksoftirqd/111:11:481
81620,0rcu_preempt3-21ksoftirqd/011:15:240
81620,0rcu_preempt3-21ksoftirqd/010:15:250
81620,0rcu_preempt3-21ksoftirqd/010:07:510
81620,0rcu_preempt3-21ksoftirqd/009:30:250
81620,0rcu_preempt3-21ksoftirqd/009:15:300
81620,0rcu_preempt19-21ksoftirqd/110:00:241
81620,0rcu_preempt19-21ksoftirqd/110:00:241
81610,0rcu_preempt32673-21apt-get08:55:110
81610,0rcu_preempt3-21ksoftirqd/008:15:220
81610,0rcu_preempt12634-21munin-node0
81600,0rcu_preempt32430-21meminfo12:20:251
81600,0rcu_preempt3-21ksoftirqd/010:13:090
81600,0rcu_preempt22832-21apt-get08:25:120
10050600,0irq/346-484840029192-21ssh11:42:571
81590,0rcu_preempt1344-21ping07:30:030
81590,0rcu_preempt0-21swapper/007:14:130
9950580,0irq/345-48484006796-1kworker/1:0H09:20:001
81580,0rcu_preempt3-21ksoftirqd/009:00:130
81580,0rcu_preempt0-21swapper/011:08:120
81580,0rcu_preempt0-21swapper/010:29:210
81570,0rcu_preempt3-21ksoftirqd/008:45:190
81570,0rcu_preempt3-21ksoftirqd/008:10:260
81570,0rcu_preempt3-21ksoftirqd/007:50:270
81570,0rcu_preempt1344-21ping07:38:570
81560,0rcu_preempt4498-21kworker/0:209:51:360
81560,0rcu_preempt19-21ksoftirqd/110:20:241
81560,0rcu_preempt0-21swapper/008:50:150
81550,0rcu_preempt3567-21apt-get09:05:120
81550,0rcu_preempt3-21ksoftirqd/008:35:260
81550,0rcu_preempt3-21ksoftirqd/007:20:360
81550,0rcu_preempt19-21ksoftirqd/111:51:021
81550,0rcu_preempt0-21swapper/010:30:200
81550,0rcu_preempt0-21swapper/009:41:140
10050550,0irq/346-48484004785-21munin-node1
10050550,0irq/346-4848400350-1kworker/1:1H11:49:391
9950540,0irq/345-48484001690-1kworker/1:0H10:33:441
81540,0rcu_preempt3-21ksoftirqd/010:50:250
81540,0rcu_preempt19-21ksoftirqd/112:14:421
81540,0rcu_preempt19-21ksoftirqd/112:00:281
81540,0rcu_preempt19-21ksoftirqd/109:35:151
10050540,0irq/346-48484000-21swapper/109:12:291
81530,0rcu_preempt3-21ksoftirqd/010:20:130
81530,0rcu_preempt19-21ksoftirqd/109:30:331
81520,0rcu_preempt19-21ksoftirqd/111:36:221
81520,0rcu_preempt19-21ksoftirqd/111:04:311
175952520,0chrt10050irq/346-484840008:08:250
10050520,0irq/346-48484000-21swapper/111:58:511
10050520,0irq/346-48484000-21swapper/109:48:511
10050520,0irq/346-48484000-21swapper/109:48:511
81510,0rcu_preempt3-21ksoftirqd/008:30:200
81510,0rcu_preempt3-21ksoftirqd/008:30:200
81510,0rcu_preempt19-21ksoftirqd/112:18:201
81510,0rcu_preempt19-21ksoftirqd/111:29:241
81510,0rcu_preempt19-21ksoftirqd/110:43:541
81500,0rcu_preempt7979-1kworker/1:0H11:18:091
81500,0rcu_preempt19-21ksoftirqd/112:29:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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