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2025-11-23 - 21:22

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 Nov 23, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811070,0rcu_preempt9950irq/345-484840007:59:370
81920,0rcu_preempt3-21ksoftirqd/009:09:470
281622920,0sleep09950irq/345-484840009:19:490
81820,0rcu_preempt26857-1kworker/0:2H11:09:590
81820,0rcu_preempt26857-1kworker/0:2H11:09:590
71032810,0sleep010050irq/346-484840008:25:460
81800,0rcu_preempt3-21ksoftirqd/012:30:010
81790,0rcu_preempt19-21ksoftirqd/112:01:451
81790,0rcu_preempt19-21ksoftirqd/108:12:001
81780,0rcu_preempt3-21ksoftirqd/009:54:340
81780,0rcu_preempt19-21ksoftirqd/110:26:331
81780,0rcu_preempt19-21ksoftirqd/108:05:411
81770,0rcu_preempt3-21ksoftirqd/011:34:490
81770,0rcu_preempt3-21ksoftirqd/011:14:470
81770,0rcu_preempt19-21ksoftirqd/107:28:351
81760,0rcu_preempt54-21kswapd010:49:091
81760,0rcu_preempt3-21ksoftirqd/008:39:340
81760,0rcu_preempt19-21ksoftirqd/111:17:561
81760,0rcu_preempt19-21ksoftirqd/108:25:511
81760,0rcu_preempt19-21ksoftirqd/107:57:021
81760,0rcu_preempt19-21ksoftirqd/107:22:151
81760,0rcu_preempt14851-21kworker/1:010:07:551
81750,0rcu_preempt19-21ksoftirqd/111:57:201
81750,0rcu_preempt19-21ksoftirqd/109:26:541
81750,0rcu_preempt19-21ksoftirqd/109:26:541
81750,0rcu_preempt19-21ksoftirqd/108:18:481
81750,0rcu_preempt19-21ksoftirqd/108:04:121
81740,0rcu_preempt54-21kswapd011:20:231
81740,0rcu_preempt25673-21ssh09:15:271
81740,0rcu_preempt19-21ksoftirqd/112:13:211
81740,0rcu_preempt19-21ksoftirqd/109:09:281
81740,0rcu_preempt19-21ksoftirqd/108:19:351
81740,0rcu_preempt19-21ksoftirqd/108:19:351
81740,0rcu_preempt19-21ksoftirqd/107:45:161
81740,0rcu_preempt19-21ksoftirqd/107:41:331
81730,0rcu_preempt6646-21ssh10:19:591
81730,0rcu_preempt20581-21diskmemload09:40:261
81730,0rcu_preempt19-21ksoftirqd/112:23:301
81730,0rcu_preempt19-21ksoftirqd/111:45:271
81730,0rcu_preempt19-21ksoftirqd/111:29:531
81730,0rcu_preempt19-21ksoftirqd/111:25:571
81730,0rcu_preempt19-21ksoftirqd/110:35:181
81730,0rcu_preempt19-21ksoftirqd/110:19:111
81730,0rcu_preempt19-21ksoftirqd/109:39:031
81730,0rcu_preempt19-21ksoftirqd/108:37:591
81730,0rcu_preempt19-21ksoftirqd/108:29:581
81730,0rcu_preempt19-21ksoftirqd/107:31:351
81720,0rcu_preempt19-21ksoftirqd/112:34:511
81720,0rcu_preempt19-21ksoftirqd/112:34:511
81720,0rcu_preempt19-21ksoftirqd/112:16:391
81720,0rcu_preempt19-21ksoftirqd/112:07:291
81720,0rcu_preempt19-21ksoftirqd/111:07:501
81720,0rcu_preempt19-21ksoftirqd/110:42:361
81720,0rcu_preempt19-21ksoftirqd/110:03:491
81720,0rcu_preempt19-21ksoftirqd/109:53:181
81720,0rcu_preempt19-21ksoftirqd/109:48:291
81720,0rcu_preempt19-21ksoftirqd/108:51:421
81720,0rcu_preempt19-21ksoftirqd/108:51:421
81720,0rcu_preempt19-21ksoftirqd/108:41:211
81720,0rcu_preempt19-21ksoftirqd/107:49:371
81710,0rcu_preempt54-21kswapd012:26:381
81710,0rcu_preempt19-21ksoftirqd/111:41:491
81710,0rcu_preempt19-21ksoftirqd/110:54:511
81710,0rcu_preempt19-21ksoftirqd/110:31:211
81710,0rcu_preempt19-21ksoftirqd/109:57:511
81710,0rcu_preempt0-21swapper/107:13:591
81700,0rcu_preempt54-21kswapd009:30:071
81700,0rcu_preempt19-21ksoftirqd/111:50:101
81700,0rcu_preempt19-21ksoftirqd/110:54:021
81700,0rcu_preempt19-21ksoftirqd/109:03:321
81700,0rcu_preempt19-21ksoftirqd/107:35:051
81700,0rcu_preempt14851-21kworker/1:011:02:401
81700,0rcu_preempt14851-21kworker/1:011:02:401
81690,0rcu_preempt19-21ksoftirqd/112:30:161
81690,0rcu_preempt19-21ksoftirqd/111:35:041
81690,0rcu_preempt19-21ksoftirqd/109:11:231
81690,0rcu_preempt19-21ksoftirqd/108:55:131
81690,0rcu_preempt14851-21kworker/1:011:10:171
81690,0rcu_preempt14851-21kworker/1:011:10:171
81680,0rcu_preempt19-21ksoftirqd/110:13:291
81680,0rcu_preempt19-21ksoftirqd/107:16:451
81670,0rcu_preempt19-21ksoftirqd/109:22:291
81670,0rcu_preempt19-21ksoftirqd/108:44:551
81630,0rcu_preempt3-21ksoftirqd/010:39:520
81620,0rcu_preempt3-21ksoftirqd/011:29:450
81610,0rcu_preempt3-21ksoftirqd/008:19:540
81610,0rcu_preempt3-21ksoftirqd/008:19:540
81610,0rcu_preempt19-21ksoftirqd/107:09:331
81610,0rcu_preempt19-21ksoftirqd/107:09:331
81600,0rcu_preempt3-21ksoftirqd/009:42:410
81600,0rcu_preempt3-21ksoftirqd/009:33:260
10050600,0irq/346-48484007047-21ssh10:20:050
81590,0rcu_preempt3-21ksoftirqd/011:06:350
81590,0rcu_preempt3-21ksoftirqd/009:55:040
39382580,0sleep010050irq/346-484840008:17:020
81570,0rcu_preempt3-21ksoftirqd/010:15:350
81570,0rcu_preempt3-21ksoftirqd/009:49:240
81560,0rcu_preempt3-21ksoftirqd/011:50:100
81560,0rcu_preempt3-21ksoftirqd/010:04:020
81560,0rcu_preempt3-21ksoftirqd/007:09:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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