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2025-12-10 - 22:38

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 Wed Dec 10, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811080,0rcu_preempt3-21ksoftirqd/010:59:190
811050,0rcu_preempt3-21ksoftirqd/009:14:180
2001321030,0sleep010050irq/346-484840007:58:490
811000,0rcu_preempt3-21ksoftirqd/009:44:330
811000,0rcu_preempt27262-21diskstats09:34:381
249352960,0sleep010050irq/346-484840008:14:000
81890,0rcu_preempt3-21ksoftirqd/011:19:160
81890,0rcu_preempt31438-21ssh09:39:480
81830,0rcu_preempt3-21ksoftirqd/012:22:180
81830,0rcu_preempt3-21ksoftirqd/009:36:220
81830,0rcu_preempt3-21ksoftirqd/009:13:470
81830,0rcu_preempt0-21swapper/112:26:331
81820,0rcu_preempt2001-1kworker/1:1H10:37:381
81800,0rcu_preempt3-21ksoftirqd/010:39:490
81800,0rcu_preempt3-21ksoftirqd/010:02:180
81800,0rcu_preempt19-21ksoftirqd/110:39:501
81790,0rcu_preempt3-21ksoftirqd/011:49:390
81780,0rcu_preempt3-21ksoftirqd/012:39:180
81740,0rcu_preempt3-21ksoftirqd/011:14:170
81740,0rcu_preempt19-21ksoftirqd/109:59:371
81730,0rcu_preempt3-21ksoftirqd/011:56:440
81730,0rcu_preempt3-21ksoftirqd/011:44:360
81730,0rcu_preempt19-21ksoftirqd/109:39:421
81720,0rcu_preempt9167-1kworker/1:0H10:44:541
81720,0rcu_preempt3-21ksoftirqd/012:33:380
81720,0rcu_preempt3-21ksoftirqd/012:27:210
280072720,0sleep010050irq/346-484840008:21:420
81700,0rcu_preempt3-21ksoftirqd/010:09:530
81690,0rcu_preempt3-21ksoftirqd/011:24:390
81680,0rcu_preempt19-21ksoftirqd/109:55:201
81660,0rcu_preempt3-21ksoftirqd/011:30:210
81660,0rcu_preempt3-21ksoftirqd/010:24:480
81660,0rcu_preempt3-21ksoftirqd/010:14:500
81660,0rcu_preempt3-21ksoftirqd/010:05:100
81660,0rcu_preempt19-21ksoftirqd/110:26:391
81650,0rcu_preempt3-21ksoftirqd/012:14:230
127262650,0sleep19950irq/345-484840011:39:341
81640,0rcu_preempt3-21ksoftirqd/011:22:400
81640,0rcu_preempt3-21ksoftirqd/010:34:190
81640,0rcu_preempt3-21ksoftirqd/009:53:530
81640,0rcu_preempt3-21ksoftirqd/009:25:410
81640,0rcu_preempt19-21ksoftirqd/112:29:391
81630,0rcu_preempt3-21ksoftirqd/011:08:330
81630,0rcu_preempt3-21ksoftirqd/010:19:420
290892630,0sleep010050irq/346-484840008:24:460
192052630,0chrt9950irq/345-484840010:09:541
81610,0rcu_preempt3-21ksoftirqd/007:19:350
81610,0rcu_preempt19-21ksoftirqd/112:06:011
81610,0rcu_preempt19-21ksoftirqd/108:59:481
81600,0rcu_preempt3-21ksoftirqd/010:45:090
81590,0rcu_preempt19-21ksoftirqd/111:44:471
218552590,0sleep010050irq/346-484840008:04:250
81580,0rcu_preempt3-21ksoftirqd/009:33:250
81580,0rcu_preempt3-21ksoftirqd/009:33:250
81580,0rcu_preempt19-21ksoftirqd/111:54:441
216032580,0sleep010050irq/346-484840008:03:120
81570,0rcu_preempt3-21ksoftirqd/012:08:390
81570,0rcu_preempt3-21ksoftirqd/011:36:150
81570,0rcu_preempt19-21ksoftirqd/111:15:511
81550,0rcu_preempt5938-1kworker/1:1H07:14:481
81540,0rcu_preempt3-21ksoftirqd/012:00:530
81540,0rcu_preempt3-21ksoftirqd/010:58:030
81540,0rcu_preempt0-21swapper/110:53:341
81540,0rcu_preempt0-21swapper/110:53:341
264112540,0sleep010050irq/346-484840008:17:170
81530,0rcu_preempt19-21ksoftirqd/109:47:521
81520,0rcu_preempt3-21ksoftirqd/007:04:380
81520,0rcu_preempt19-21ksoftirqd/110:23:261
81520,0rcu_preempt19-21ksoftirqd/110:15:371
43572520,0sleep19950irq/345-484840012:14:321
81510,0rcu_preempt3-21ksoftirqd/007:24:520
81510,0rcu_preempt19-21ksoftirqd/111:19:351
4350510,0irq/32-433000004384-21dropbear08:49:320
10050510,0irq/346-484840054-21kswapd010:31:430
10050510,0irq/346-48484002840-1kworker/0:0H12:12:390
81500,0rcu_preempt3-21ksoftirqd/007:49:360
81500,0rcu_preempt3-21ksoftirqd/007:34:540
81500,0rcu_preempt19-21ksoftirqd/109:12:291
4350500,0irq/32-4330000054-21kswapd009:54:360
10050500,0irq/346-484840054-21kswapd007:39:200
10050500,0irq/346-48484000-21swapper/011:39:450
81490,0rcu_preempt19-21ksoftirqd/112:19:371
253592490,0sleep19950irq/345-484840008:14:391
81470,0rcu_preempt7169-1kworker/1:3H07:29:361
81470,0rcu_preempt3-21ksoftirqd/010:49:330
81470,0rcu_preempt3-21ksoftirqd/010:49:330
10050470,0irq/346-484840032556-1kworker/0:2H07:16:340
9950460,0irq/345-4848400713-21sh08:39:170
81460,0rcu_preempt19-21ksoftirqd/111:33:561
10050460,0irq/346-484840015320-21munin-node0
10050460,0irq/346-484840015320-21munin-node0
9950450,0irq/345-48484003-21ksoftirqd/007:29:580
81450,0rcu_preempt19-21ksoftirqd/107:39:191
10050450,0irq/346-48484002076-1kworker/0:2H09:20:020
10050450,0irq/346-48484002076-1kworker/0:2H09:20:020
10050440,0irq/346-484840029646-1kworker/0:2H08:31:180
10050440,0irq/346-48484002076-1kworker/0:2H08:45:010
9950430,0irq/345-48484007077-1kworker/0:3H08:59:180
13150430,0irq/301-48020000-21swapper/008:39:340
81420,0rcu_preempt19-21ksoftirqd/111:24:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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