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2026-07-13 - 15:45

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 Mon Jul 13, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt19-21ksoftirqd/112:17:041
81880,0rcu_preempt804-1kworker/1:0H11:21:031
81870,0rcu_preempt19-21ksoftirqd/110:05:191
81790,0rcu_preempt19-21ksoftirqd/112:22:191
81710,0rcu_preempt3-21ksoftirqd/010:47:060
10050710,0irq/346-484840019924-1kworker/0:0H10:01:250
81700,0rcu_preempt3-21ksoftirqd/010:38:040
81700,0rcu_preempt3-21ksoftirqd/008:41:230
81700,0rcu_preempt19-21ksoftirqd/111:32:041
81700,0rcu_preempt19-21ksoftirqd/108:17:041
81690,0rcu_preempt3-21ksoftirqd/010:12:000
81690,0rcu_preempt3-21ksoftirqd/009:31:400
81690,0rcu_preempt3-21ksoftirqd/008:09:080
81690,0rcu_preempt29230-21ssh12:21:080
81690,0rcu_preempt19-21ksoftirqd/111:42:321
81690,0rcu_preempt18635-21ssh11:37:201
81680,0rcu_preempt32758-21diskmemload10:14:391
81680,0rcu_preempt3-21ksoftirqd/011:09:500
81680,0rcu_preempt3-21ksoftirqd/009:47:410
81680,0rcu_preempt19-21ksoftirqd/108:07:041
81680,0rcu_preempt16392-21ssh11:02:120
81670,0rcu_preempt4572-21ssh09:43:410
81670,0rcu_preempt3-21ksoftirqd/011:34:570
81670,0rcu_preempt3-21ksoftirqd/011:28:490
81670,0rcu_preempt3-21ksoftirqd/011:22:170
81670,0rcu_preempt3-21ksoftirqd/010:35:450
81670,0rcu_preempt3-21ksoftirqd/010:17:110
81670,0rcu_preempt3-21ksoftirqd/009:52:390
81670,0rcu_preempt3-21ksoftirqd/009:34:170
81670,0rcu_preempt3-21ksoftirqd/007:54:440
81670,0rcu_preempt3-21ksoftirqd/007:22:260
81670,0rcu_preempt2215-21ssh11:52:560
81670,0rcu_preempt0-21swapper/012:09:050
81660,0rcu_preempt3619-21ssh10:16:190
81660,0rcu_preempt3-21ksoftirqd/012:15:190
81660,0rcu_preempt3-21ksoftirqd/011:20:410
81660,0rcu_preempt3-21ksoftirqd/009:13:250
81660,0rcu_preempt3-21ksoftirqd/007:57:200
81660,0rcu_preempt3-21ksoftirqd/007:17:210
81660,0rcu_preempt26201-21ssh10:06:180
81660,0rcu_preempt24757-21ssh11:42:520
81660,0rcu_preempt1761-21ssh09:41:290
81660,0rcu_preempt13737-21ssh12:05:110
81660,0rcu_preempt0-21swapper/010:26:280
81650,0rcu_preempt9152-21ssh12:00:360
81650,0rcu_preempt3-21ksoftirqd/012:36:180
81650,0rcu_preempt3-21ksoftirqd/012:28:080
81650,0rcu_preempt3-21ksoftirqd/012:25:020
81650,0rcu_preempt3-21ksoftirqd/010:58:340
81650,0rcu_preempt3-21ksoftirqd/009:24:320
81650,0rcu_preempt3-21ksoftirqd/009:18:190
81650,0rcu_preempt3-21ksoftirqd/008:20:260
81650,0rcu_preempt3-21ksoftirqd/007:38:210
81650,0rcu_preempt2892-21ssh09:08:540
81640,0rcu_preempt3-21ksoftirqd/011:17:000
81640,0rcu_preempt3-21ksoftirqd/008:31:050
81640,0rcu_preempt21523-21ssh11:40:060
81640,0rcu_preempt19-21ksoftirqd/109:32:161
81630,0rcu_preempt9043-21ssh10:54:120
81630,0rcu_preempt3-21ksoftirqd/010:42:470
81630,0rcu_preempt3-21ksoftirqd/010:28:270
81630,0rcu_preempt3-21ksoftirqd/009:03:330
81630,0rcu_preempt3-21ksoftirqd/008:57:490
81630,0rcu_preempt3-21ksoftirqd/008:55:370
81630,0rcu_preempt3-21ksoftirqd/008:48:520
81630,0rcu_preempt3-21ksoftirqd/008:42:440
81630,0rcu_preempt3-21ksoftirqd/008:12:410
81630,0rcu_preempt3-21ksoftirqd/007:49:220
81630,0rcu_preempt3-21ksoftirqd/007:13:120
81630,0rcu_preempt3-21ksoftirqd/007:10:510
81630,0rcu_preempt29782-21ssh11:48:000
81630,0rcu_preempt2144-21if_eth107:32:280
81630,0rcu_preempt19-21ksoftirqd/111:22:251
81630,0rcu_preempt19-21ksoftirqd/109:46:581
81620,0rcu_preempt3-21ksoftirqd/008:32:480
81620,0rcu_preempt3-21ksoftirqd/008:25:310
81620,0rcu_preempt3-21ksoftirqd/007:45:210
81620,0rcu_preempt3-21ksoftirqd/007:45:210
81620,0rcu_preempt3-21ksoftirqd/007:27:260
81620,0rcu_preempt19-21ksoftirqd/112:11:061
81620,0rcu_preempt19-21ksoftirqd/107:07:041
81610,0rcu_preempt19-21ksoftirqd/110:22:041
81600,0rcu_preempt19-21ksoftirqd/112:32:161
81600,0rcu_preempt19-21ksoftirqd/110:37:141
9950590,0irq/345-4848400171rcuc/107:47:231
9950580,0irq/345-4848400181ktimersoftd/111:11:471
81570,0rcu_preempt2641-21kworker/1:009:47:521
81570,0rcu_preempt19-21ksoftirqd/109:52:291
81540,0rcu_preempt32758-21diskmemload10:27:261
81540,0rcu_preempt10682-1kworker/1:0H11:32:321
81530,0rcu_preempt3-21ksoftirqd/007:02:230
81520,0rcu_preempt19-21ksoftirqd/111:02:181
81520,0rcu_preempt19-21ksoftirqd/109:17:231
81510,0rcu_preempt19-21ksoftirqd/110:42:221
81510,0rcu_preempt19-21ksoftirqd/110:36:001
9950500,0irq/345-484840019172-1kworker/1:2H09:59:221
81500,0rcu_preempt1072-21munin-node1
81490,0rcu_preempt19-21ksoftirqd/108:47:221
10050490,0irq/346-48484003234-1kworker/1:1H09:13:221
81480,0rcu_preempt19-21ksoftirqd/109:27:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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