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2026-06-23 - 04:06

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 Jun 23, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811330,0rcu_preempt19-21ksoftirqd/120:37:231
10050770,0irq/346-484840054-21kswapd021:41:260
81750,0rcu_preempt19-21ksoftirqd/122:57:551
10050730,0irq/346-484840054-21kswapd000:21:500
81700,0rcu_preempt23393-21kworker/0:223:37:350
10050690,0irq/346-484840019852-1kworker/0:2H23:08:060
10050680,0irq/346-484840027070-1kworker/0:3H23:42:440
81670,0rcu_preempt7618-1kworker/0:1H22:17:520
81670,0rcu_preempt19-21ksoftirqd/121:37:491
81660,0rcu_preempt9309-21df_abs00:27:380
81660,0rcu_preempt3-21ksoftirqd/020:52:470
81640,0rcu_preempt3-21ksoftirqd/020:17:440
81640,0rcu_preempt3-21ksoftirqd/000:07:420
81630,0rcu_preempt3-21ksoftirqd/021:57:380
81620,0rcu_preempt3-21ksoftirqd/019:52:390
81620,0rcu_preempt3-21ksoftirqd/019:52:390
81620,0rcu_preempt30693-21ssh22:37:450
31103996217,0cyclictest20217-1kworker/0:2H21:57:230
10050620,0irq/346-48484002651-1kworker/0:2H22:09:340
81610,0rcu_preempt3-21ksoftirqd/021:42:470
81600,0rcu_preempt3-21ksoftirqd/022:52:360
81600,0rcu_preempt15147-21ssh00:32:520
81600,0rcu_preempt1242-21ntpd21:02:490
81590,0rcu_preempt3-21ksoftirqd/019:22:340
81590,0rcu_preempt19-21ksoftirqd/122:47:241
81580,0rcu_preempt3-21ksoftirqd/020:37:240
81570,0rcu_preempt3-21ksoftirqd/022:22:350
81570,0rcu_preempt3-21ksoftirqd/000:06:520
10050570,0irq/346-484840081152sleep121:09:041
81560,0rcu_preempt3-21ksoftirqd/022:12:480
81560,0rcu_preempt3-21ksoftirqd/021:22:240
81560,0rcu_preempt19-21ksoftirqd/121:52:341
81550,0rcu_preempt3-21ksoftirqd/021:00:290
81550,0rcu_preempt3-21ksoftirqd/020:42:500
81550,0rcu_preempt3-21ksoftirqd/019:47:510
81550,0rcu_preempt2804-21kworker/0:220:07:380
81540,0rcu_preempt3-21ksoftirqd/023:47:430
81540,0rcu_preempt3-21ksoftirqd/023:27:480
81540,0rcu_preempt3-21ksoftirqd/023:02:430
81540,0rcu_preempt3-21ksoftirqd/022:42:460
81540,0rcu_preempt3-21ksoftirqd/020:27:510
10050540,0irq/346-48484009801-21php-cgi23:54:591
10050540,0irq/346-484840054-21kswapd019:32:231
81530,0rcu_preempt3-21ksoftirqd/022:27:410
81530,0rcu_preempt3-21ksoftirqd/020:47:500
81530,0rcu_preempt3-21ksoftirqd/020:47:500
81530,0rcu_preempt3-21ksoftirqd/019:27:410
81530,0rcu_preempt19-21ksoftirqd/122:12:351
31103995317,0cyclictest21346-1kworker/0:0H23:37:200
31103995317,0cyclictest21346-1kworker/0:0H23:37:200
10050530,0irq/346-484840054-21kswapd022:08:201
10050530,0irq/346-48484000-21swapper/122:00:231
81520,0rcu_preempt3-21ksoftirqd/021:30:310
81520,0rcu_preempt3-21ksoftirqd/020:02:470
81520,0rcu_preempt3-21ksoftirqd/020:02:470
81520,0rcu_preempt19-21ksoftirqd/121:12:351
3110399526,0cyclictest320-1kworker/0:2H21:35:140
3110399522,0cyclictest1981-21ping19:17:370
10050520,0irq/346-484840054-21kswapd023:31:501
81510,0rcu_preempt54-21kswapd021:18:281
81510,0rcu_preempt3-21ksoftirqd/022:57:360
81510,0rcu_preempt3-21ksoftirqd/000:22:470
81510,0rcu_preempt31359-21kworker/0:021:08:360
81510,0rcu_preempt19-21ksoftirqd/123:42:351
81510,0rcu_preempt19-21ksoftirqd/123:37:501
31103995122,0cyclictest21621-21munin-node0
81500,0rcu_preempt5679-21diskmemload23:14:310
81500,0rcu_preempt3-21ksoftirqd/023:57:420
81500,0rcu_preempt3-21ksoftirqd/023:52:440
81500,0rcu_preempt3-21ksoftirqd/023:17:500
81500,0rcu_preempt3-21ksoftirqd/021:17:200
81500,0rcu_preempt2804-21kworker/0:219:57:520
81500,0rcu_preempt19-21ksoftirqd/120:37:341
81500,0rcu_preempt19-21ksoftirqd/119:37:461
81500,0rcu_preempt19-21ksoftirqd/119:32:361
81490,0rcu_preempt3-21ksoftirqd/023:26:110
81490,0rcu_preempt3-21ksoftirqd/022:48:020
81490,0rcu_preempt3-21ksoftirqd/021:48:020
81490,0rcu_preempt3-21ksoftirqd/021:48:020
81490,0rcu_preempt3-21ksoftirqd/019:12:350
81490,0rcu_preempt3-21ksoftirqd/019:10:220
81490,0rcu_preempt19-21ksoftirqd/120:19:321
81490,0rcu_preempt19-21ksoftirqd/119:47:441
81490,0rcu_preempt19-21ksoftirqd/119:42:581
31103994913,0cyclictest25159-1kworker/0:1H22:03:220
10050490,0irq/346-484840055402sleep100:23:061
10050490,0irq/346-484840054-21kswapd000:16:510
10050490,0irq/346-484840054-21kswapd000:15:271
81480,0rcu_preempt3-21ksoftirqd/020:22:510
81480,0rcu_preempt13193-21users23:57:551
81480,0rcu_preempt12689-21kworker/0:022:33:130
10050480,0irq/346-484840030114-1kworker/1:1H22:04:181
81470,0rcu_preempt9727-21diskmemload23:22:341
81470,0rcu_preempt2652-1kworker/1:2H22:17:531
81470,0rcu_preempt20171-21apt-get20:12:341
81470,0rcu_preempt19-21ksoftirqd/121:49:111
81470,0rcu_preempt19-21ksoftirqd/121:49:111
81470,0rcu_preempt19-21ksoftirqd/120:07:361
81470,0rcu_preempt19-21ksoftirqd/100:32:361
81470,0rcu_preempt19-21ksoftirqd/100:17:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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