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2025-12-01 - 15:26

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 Dec 01, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81940,0rcu_preempt3-21ksoftirqd/012:28:200
81930,0rcu_preempt3-21ksoftirqd/007:21:200
81920,0rcu_preempt3-21ksoftirqd/011:39:530
81920,0rcu_preempt3-21ksoftirqd/008:50:010
81910,0rcu_preempt751-21rngd12:21:550
81880,0rcu_preempt3-21ksoftirqd/010:18:570
81870,0rcu_preempt3-21ksoftirqd/009:37:280
81750,0rcu_preempt3-21ksoftirqd/011:49:550
81750,0rcu_preempt2546-21kworker/u4:009:39:290
81740,0rcu_preempt19-21ksoftirqd/107:39:291
81740,0rcu_preempt19-21ksoftirqd/107:39:291
81730,0rcu_preempt517-21kworker/0:012:09:130
81710,0rcu_preempt517-21kworker/0:011:59:470
81710,0rcu_preempt511-21kworker/0:210:49:520
81710,0rcu_preempt511-21kworker/0:210:49:520
81710,0rcu_preempt29441-21kworker/0:111:19:390
81710,0rcu_preempt17729-21kworker/0:211:58:270
237742700,0sleep010050irq/346-484840008:15:590
10050690,0irq/346-48484007832-1kworker/0:1H09:15:330
10050690,0irq/346-48484007832-1kworker/0:1H09:15:330
81680,0rcu_preempt3-21ksoftirqd/010:25:220
81680,0rcu_preempt3-21ksoftirqd/010:25:220
81680,0rcu_preempt1250-21lldpd10:41:100
10050680,0irq/346-484840054-21kswapd011:37:350
81670,0rcu_preempt54-21kswapd010:59:560
81670,0rcu_preempt511-21kworker/0:210:13:070
81670,0rcu_preempt3-21ksoftirqd/012:10:350
81670,0rcu_preempt3-21ksoftirqd/011:24:520
81670,0rcu_preempt3-21ksoftirqd/009:23:020
81670,0rcu_preempt10844-21kworker/0:011:07:140
81660,0rcu_preempt3-21ksoftirqd/012:14:280
81660,0rcu_preempt3-21ksoftirqd/009:59:520
81650,0rcu_preempt3-21ksoftirqd/010:04:400
81650,0rcu_preempt3-21ksoftirqd/008:24:390
81640,0rcu_preempt29441-21kworker/0:111:13:070
81630,0rcu_preempt3-21ksoftirqd/009:05:010
81630,0rcu_preempt3-21ksoftirqd/007:40:080
81630,0rcu_preempt3-21ksoftirqd/007:40:080
81630,0rcu_preempt19-21ksoftirqd/111:19:591
81620,0rcu_preempt3-21ksoftirqd/011:29:550
81620,0rcu_preempt3-21ksoftirqd/007:54:390
81620,0rcu_preempt14436-21apt-get07:49:380
81610,0rcu_preempt3-21ksoftirqd/012:38:460
81610,0rcu_preempt3-21ksoftirqd/011:44:490
81610,0rcu_preempt3-21ksoftirqd/011:16:010
81610,0rcu_preempt3-21ksoftirqd/010:35:080
81610,0rcu_preempt3-21ksoftirqd/009:49:030
81610,0rcu_preempt3-21ksoftirqd/009:49:030
81610,0rcu_preempt3-21ksoftirqd/008:04:570
81610,0rcu_preempt0-21swapper/009:14:070
81600,0rcu_preempt3-21ksoftirqd/012:31:370
81600,0rcu_preempt3-21ksoftirqd/010:57:370
81600,0rcu_preempt3-21ksoftirqd/010:45:370
81600,0rcu_preempt3-21ksoftirqd/010:30:360
81600,0rcu_preempt3-21ksoftirqd/009:49:410
81600,0rcu_preempt3-21ksoftirqd/009:24:450
81600,0rcu_preempt3-21ksoftirqd/008:54:490
81600,0rcu_preempt3-21ksoftirqd/008:54:490
81600,0rcu_preempt3-21ksoftirqd/008:29:390
81600,0rcu_preempt3-21ksoftirqd/007:09:580
81590,0rcu_preempt3-21ksoftirqd/010:20:300
81590,0rcu_preempt3-21ksoftirqd/009:29:380
81590,0rcu_preempt3-21ksoftirqd/008:19:460
81590,0rcu_preempt3-21ksoftirqd/008:11:030
81580,0rcu_preempt3-21ksoftirqd/009:55:050
81580,0rcu_preempt3-21ksoftirqd/008:59:440
81580,0rcu_preempt3-21ksoftirqd/008:34:560
81580,0rcu_preempt3-21ksoftirqd/007:59:550
81580,0rcu_preempt3-21ksoftirqd/007:16:540
81570,0rcu_preempt3-21ksoftirqd/008:40:060
81570,0rcu_preempt3-21ksoftirqd/007:47:500
81570,0rcu_preempt3-21ksoftirqd/007:28:330
9950560,0irq/345-484840021082-1kworker/1:4H11:41:111
9950560,0irq/345-484840020069-1kworker/1:2H09:54:071
81560,0rcu_preempt3-21ksoftirqd/007:33:100
1181995611,0cyclictest10712-1kworker/0:1H07:39:270
81550,0rcu_preempt3-21ksoftirqd/008:47:000
9950530,0irq/345-484840054-21kswapd011:59:271
9950530,0irq/345-484840031001-1kworker/1:1H10:26:201
9950530,0irq/345-484840031001-1kworker/1:1H10:26:201
81530,0rcu_preempt19-21ksoftirqd/110:15:131
10050530,0irq/346-484840054-21kswapd009:35:391
9950520,0irq/345-484840013884-1kworker/1:3H10:50:401
9950520,0irq/345-484840013884-1kworker/1:3H10:50:401
9950500,0irq/345-484840010845-1kworker/1:2H12:11:201
10050500,0irq/346-48484002242-1kworker/1:3H10:39:271
10050500,0irq/346-48484002242-1kworker/1:3H10:38:581
9950490,0irq/345-48484009881-1kworker/1:1H11:26:071
9950490,0irq/345-48484002941-1kworker/1:1H11:18:461
9950490,0irq/345-484840023164-1kworker/1:0H12:27:001
110682490,0sleep19950irq/345-484840009:59:311
10050490,0irq/346-484840017261-1kworker/1:0H11:39:271
10050490,0irq/346-48484000-21swapper/107:44:491
81480,0rcu_preempt22187-1kworker/1:2H08:19:281
81480,0rcu_preempt19-21ksoftirqd/107:59:261
10050480,0irq/346-48484007831-1kworker/1:1H09:15:471
10050480,0irq/346-48484007831-1kworker/1:1H09:15:471
10050480,0irq/346-48484005991-21sed12:04:571
10050480,0irq/346-484840014927-1kworker/1:1H12:19:281
10050480,0irq/346-48484000-21swapper/110:59:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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