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2025-11-24 - 21:40

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 Nov 24, 2025 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811310,0rcu_preempt3-21ksoftirqd/010:21:410
811270,0rcu_preempt3-21ksoftirqd/012:30:090
811250,0rcu_preempt3-21ksoftirqd/011:50:500
811200,0rcu_preempt0-21swapper/009:40:470
811100,0rcu_preempt3-21ksoftirqd/011:40:330
811020,0rcu_preempt3-21ksoftirqd/012:37:580
811010,0rcu_preempt3-21ksoftirqd/011:00:360
81980,0rcu_preempt54-21kswapd011:57:330
81910,0rcu_preempt3-21ksoftirqd/009:09:440
81890,0rcu_preempt25917-21kworker/0:211:38:470
81840,0rcu_preempt3-21ksoftirqd/010:28:420
81820,0rcu_preempt20367-21kworker/0:010:37:020
81820,0rcu_preempt20367-21kworker/0:010:37:020
81810,0rcu_preempt3275-21kworker/0:109:21:150
81810,0rcu_preempt3-21ksoftirqd/009:49:440
81810,0rcu_preempt3-21ksoftirqd/009:49:440
81810,0rcu_preempt3-21ksoftirqd/007:59:230
81810,0rcu_preempt20367-21kworker/0:010:29:460
81800,0rcu_preempt54-21kswapd007:45:120
81800,0rcu_preempt3-21ksoftirqd/009:33:560
81800,0rcu_preempt29889-21kworker/0:109:45:040
81790,0rcu_preempt3-21ksoftirqd/011:49:320
81790,0rcu_preempt3-21ksoftirqd/010:05:190
81790,0rcu_preempt3-21ksoftirqd/008:08:030
81780,0rcu_preempt6034-21kworker/0:009:54:560
81780,0rcu_preempt11443-21kworker/0:112:24:320
81770,0rcu_preempt588-21kworker/u4:007:19:570
81770,0rcu_preempt3-21ksoftirqd/011:25:470
81770,0rcu_preempt3-21ksoftirqd/011:15:020
81770,0rcu_preempt21646-21kworker/0:208:11:390
81770,0rcu_preempt21646-21kworker/0:208:11:390
81760,0rcu_preempt3-21ksoftirqd/012:13:530
81760,0rcu_preempt3-21ksoftirqd/012:08:010
81760,0rcu_preempt3-21ksoftirqd/008:59:330
81760,0rcu_preempt26426-21kworker/0:208:24:510
81760,0rcu_preempt26049-1kworker/0:2H11:10:440
81760,0rcu_preempt20367-21kworker/0:010:48:540
81750,0rcu_preempt3-21ksoftirqd/012:27:230
81750,0rcu_preempt3-21ksoftirqd/010:44:000
81750,0rcu_preempt3-21ksoftirqd/010:09:560
81750,0rcu_preempt3-21ksoftirqd/009:35:040
81750,0rcu_preempt3-21ksoftirqd/008:18:030
81750,0rcu_preempt3-21ksoftirqd/008:02:480
81750,0rcu_preempt25917-21kworker/0:211:22:190
81750,0rcu_preempt24734-21kworker/0:108:20:030
81740,0rcu_preempt3-21ksoftirqd/012:17:250
81740,0rcu_preempt3-21ksoftirqd/012:01:570
81740,0rcu_preempt3-21ksoftirqd/011:06:060
81740,0rcu_preempt3-21ksoftirqd/010:00:080
81730,0rcu_preempt7331-21kworker/0:107:42:020
81730,0rcu_preempt7331-21kworker/0:107:30:070
81730,0rcu_preempt3-21ksoftirqd/011:34:030
81730,0rcu_preempt3-21ksoftirqd/010:52:500
81730,0rcu_preempt3-21ksoftirqd/010:16:340
81730,0rcu_preempt3-21ksoftirqd/009:27:480
81730,0rcu_preempt3-21ksoftirqd/008:40:220
81720,0rcu_preempt54-21kswapd008:45:090
81720,0rcu_preempt3-21ksoftirqd/010:54:480
81720,0rcu_preempt3-21ksoftirqd/009:17:590
81720,0rcu_preempt3-21ksoftirqd/009:07:310
81720,0rcu_preempt3-21ksoftirqd/007:50:000
10050720,0irq/346-484840032532-1kworker/1:0H11:17:451
10050710,0irq/346-484840011074-1kworker/1:0H10:55:071
81690,0rcu_preempt3-21ksoftirqd/007:14:530
81680,0rcu_preempt5280-21ping07:35:000
81680,0rcu_preempt3-21ksoftirqd/008:55:440
81680,0rcu_preempt3-21ksoftirqd/008:30:010
81680,0rcu_preempt3-21ksoftirqd/007:10:020
81680,0rcu_preempt3-21ksoftirqd/007:10:020
81670,0rcu_preempt3-21ksoftirqd/008:49:330
81660,0rcu_preempt3-21ksoftirqd/007:25:070
81620,0rcu_preempt3-21ksoftirqd/008:39:100
9950610,0irq/345-4848400181ktimersoftd/112:34:581
81590,0rcu_preempt19-21ksoftirqd/110:29:501
10050580,0irq/346-48484001979-21df_inode12:04:481
10050570,0irq/346-48484009697-21ssh09:58:001
10050570,0irq/346-48484000-21swapper/111:49:511
81560,0rcu_preempt19-21ksoftirqd/110:53:131
9950550,0irq/345-4848400200299cyclictest11:34:461
10050550,0irq/346-484840021374-1kworker/1:3H11:46:511
10050550,0irq/346-48484000-21swapper/109:31:471
10050540,0irq/346-48484000-21swapper/110:20:231
10050530,0irq/346-484840054-21kswapd012:19:361
10050530,0irq/346-484840015372-21ssh10:05:321
9950520,0irq/345-4848400171rcuc/109:38:531
235192510,0sleep19950irq/345-484840011:03:591
10050510,0irq/346-484840054-21kswapd010:44:161
10050510,0irq/346-48484000-21swapper/109:09:331
9950500,0irq/345-484840081rcu_preempt10:35:361
9950500,0irq/345-484840081rcu_preempt10:35:361
9950500,0irq/345-484840010929-1kworker/1:1H12:19:331
10050500,0irq/346-48484004941-1kworker/1:0H07:19:351
10050500,0irq/346-484840021794-1kworker/1:3H12:34:331
9950490,0irq/345-48484009013-1kworker/1:3H09:59:341
9950490,0irq/345-4848400751-21rngd07:19:331
9950490,0irq/345-48484007463-1kworker/1:4H10:44:511
9950490,0irq/345-484840029431-1kworker/1:1H11:13:181
9950490,0irq/345-484840015636-21munin-run09:19:321
10050490,0irq/346-4848400181ktimersoftd/111:32:281
9950480,0irq/345-484840021853-1kworker/1:1H11:04:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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