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2026-06-14 - 16:06

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 Sun Jun 14, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811490,0rcu_preempt3-21ksoftirqd/010:16:440
811490,0rcu_preempt3-21ksoftirqd/010:16:440
811410,0rcu_preempt3-21ksoftirqd/012:32:590
811380,0rcu_preempt3-21ksoftirqd/009:55:140
811380,0rcu_preempt3-21ksoftirqd/009:55:140
811380,0rcu_preempt3-21ksoftirqd/009:38:000
811310,0rcu_preempt3-21ksoftirqd/009:58:050
811300,0rcu_preempt3-21ksoftirqd/009:45:510
811300,0rcu_preempt3-21ksoftirqd/009:45:510
811240,0rcu_preempt3-21ksoftirqd/011:10:380
811040,0rcu_preempt3-21ksoftirqd/010:27:580
81980,0rcu_preempt3-21ksoftirqd/012:16:420
81920,0rcu_preempt3-21ksoftirqd/011:02:510
81920,0rcu_preempt3-21ksoftirqd/011:02:510
81890,0rcu_preempt2718-21kworker/0:109:47:590
81880,0rcu_preempt3-21ksoftirqd/011:48:000
81860,0rcu_preempt3-21ksoftirqd/011:52:470
81860,0rcu_preempt3-21ksoftirqd/007:52:330
81860,0rcu_preempt11249-21kworker/u4:010:42:530
81850,0rcu_preempt3-21ksoftirqd/009:32:220
81840,0rcu_preempt12251-21kworker/0:009:23:290
81830,0rcu_preempt3-21ksoftirqd/010:22:480
81830,0rcu_preempt3-21ksoftirqd/008:05:330
81810,0rcu_preempt5561-21kworker/0:110:55:300
81810,0rcu_preempt3-21ksoftirqd/008:23:370
81810,0rcu_preempt3-21ksoftirqd/008:14:320
81800,0rcu_preempt54-21kswapd008:01:100
81800,0rcu_preempt3-21ksoftirqd/011:46:180
81800,0rcu_preempt3-21ksoftirqd/011:46:180
81800,0rcu_preempt3-21ksoftirqd/011:37:380
81800,0rcu_preempt3-21ksoftirqd/010:59:420
81790,0rcu_preempt3-21ksoftirqd/012:08:410
81790,0rcu_preempt3-21ksoftirqd/011:36:130
81790,0rcu_preempt3-21ksoftirqd/010:12:320
81790,0rcu_preempt24439-21kworker/0:109:11:180
81780,0rcu_preempt3-21ksoftirqd/010:19:150
81780,0rcu_preempt3-21ksoftirqd/010:19:150
81780,0rcu_preempt14539-21kworker/0:108:12:230
81770,0rcu_preempt32513-21kworker/0:012:26:130
81770,0rcu_preempt3-21ksoftirqd/012:02:550
81770,0rcu_preempt3-21ksoftirqd/011:27:540
81770,0rcu_preempt3-21ksoftirqd/010:02:480
81770,0rcu_preempt3-21ksoftirqd/010:02:480
81770,0rcu_preempt3-21ksoftirqd/008:56:510
81760,0rcu_preempt3603-21munin-run11:22:320
81760,0rcu_preempt32436-21kworker/0:212:00:080
81760,0rcu_preempt3-21ksoftirqd/012:19:100
81760,0rcu_preempt3-21ksoftirqd/011:15:220
81760,0rcu_preempt3-21ksoftirqd/011:15:220
81760,0rcu_preempt3-21ksoftirqd/010:50:100
81760,0rcu_preempt3-21ksoftirqd/010:34:250
81760,0rcu_preempt3-21ksoftirqd/009:15:370
81760,0rcu_preempt3-21ksoftirqd/008:28:000
81760,0rcu_preempt3-21ksoftirqd/007:13:000
81760,0rcu_preempt3-21ksoftirqd/007:11:110
81750,0rcu_preempt3-21ksoftirqd/009:35:450
81750,0rcu_preempt3-21ksoftirqd/009:19:580
81750,0rcu_preempt3-21ksoftirqd/009:06:160
81750,0rcu_preempt3-21ksoftirqd/008:39:340
81740,0rcu_preempt3-21ksoftirqd/011:24:440
81740,0rcu_preempt3-21ksoftirqd/008:43:150
81740,0rcu_preempt3-21ksoftirqd/008:36:180
81730,0rcu_preempt9606-21ping08:17:490
81730,0rcu_preempt3-21ksoftirqd/008:58:400
81730,0rcu_preempt3-21ksoftirqd/008:50:120
81730,0rcu_preempt3-21ksoftirqd/007:46:490
81730,0rcu_preempt26948-21ssh10:39:460
81720,0rcu_preempt3-21ksoftirqd/012:28:240
81710,0rcu_preempt3-21ksoftirqd/007:53:570
81710,0rcu_preempt3-21ksoftirqd/007:22:460
81700,0rcu_preempt3-21ksoftirqd/007:38:050
81680,0rcu_preempt3-21ksoftirqd/007:32:500
9950670,0irq/345-4848400181ktimersoftd/109:30:431
81660,0rcu_preempt32238-21kworker/0:007:32:170
10050630,0irq/346-4848400181ktimersoftd/111:38:571
10050630,0irq/346-484840018054-21ssh11:37:111
81620,0rcu_preempt3-21ksoftirqd/007:17:460
10050620,0irq/346-4848400181ktimersoftd/111:23:531
10050610,0irq/346-48484001971-21ssh10:14:171
10050610,0irq/346-48484001971-21ssh10:14:171
10050610,0irq/346-4848400171rcuc/109:48:581
10050600,0irq/346-484840020104-1kworker/1:0H10:01:201
10050600,0irq/346-484840019-21ksoftirqd/111:09:351
10050590,0irq/346-48484002436-21ssh09:42:311
10050590,0irq/346-4848400181ktimersoftd/111:15:301
10050590,0irq/346-4848400181ktimersoftd/111:15:301
9950580,0irq/345-4848400171rcuc/112:02:531
10050580,0irq/346-484840054-21kswapd010:45:201
10050580,0irq/346-4848400181ktimersoftd/110:55:171
9950570,0irq/345-4848400181ktimersoftd/112:30:531
9950570,0irq/345-4848400181ktimersoftd/110:49:571
10050570,0irq/346-48484008044-1kworker/1:1H12:02:291
10050570,0irq/346-48484007386-1kworker/1:1H10:22:531
10050570,0irq/346-4848400181ktimersoftd/110:29:411
9950560,0irq/345-48484002588199cyclictest10:12:321
9950560,0irq/345-4848400181ktimersoftd/112:07:341
9950560,0irq/345-4848400181ktimersoftd/111:51:371
9950560,0irq/345-4848400181ktimersoftd/111:03:431
9950560,0irq/345-4848400181ktimersoftd/111:03:431
9950560,0irq/345-4848400171rcuc/111:01:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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