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2026-05-26 - 21:29

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 50 highest latencies:
System rackaslot5s.osadl.org (updated Tue May 26, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt3-21ksoftirqd/012:11:250
81740,0rcu_preempt19-21ksoftirqd/110:57:121
81720,0rcu_preempt19-21ksoftirqd/112:04:011
81710,0rcu_preempt3-21ksoftirqd/010:13:550
81710,0rcu_preempt19-21ksoftirqd/111:03:121
81710,0rcu_preempt19-21ksoftirqd/109:43:511
81700,0rcu_preempt1937-21munin-run09:42:511
81690,0rcu_preempt19-21ksoftirqd/112:02:501
81670,0rcu_preempt4980-21rm11:23:560
81670,0rcu_preempt3-21ksoftirqd/012:01:220
81650,0rcu_preempt18839-21kworker/0:111:40:260
81640,0rcu_preempt3-21ksoftirqd/012:03:170
81630,0rcu_preempt851-21rngd09:44:130
81620,0rcu_preempt19-21ksoftirqd/111:30:181
81620,0rcu_preempt19-21ksoftirqd/109:23:081
81620,0rcu_preempt19-21ksoftirqd/109:23:081
81610,0rcu_preempt19-21ksoftirqd/112:37:301
81610,0rcu_preempt19-21ksoftirqd/111:18:021
81610,0rcu_preempt18718-21kworker/0:007:13:050
81600,0rcu_preempt19-21ksoftirqd/110:51:551
81590,0rcu_preempt19-21ksoftirqd/111:33:041
81590,0rcu_preempt19-21ksoftirqd/107:43:171
81590,0rcu_preempt19-21ksoftirqd/107:28:131
10050590,0irq/346-48484000-21swapper/009:16:150
10050590,0irq/346-48484000-21swapper/009:16:150
81580,0rcu_preempt3-21ksoftirqd/008:23:100
81570,0rcu_preempt3-21ksoftirqd/011:08:190
81570,0rcu_preempt3-21ksoftirqd/011:08:190
81570,0rcu_preempt3-21ksoftirqd/010:58:040
81570,0rcu_preempt3-21ksoftirqd/009:48:020
81570,0rcu_preempt3-21ksoftirqd/008:28:010
81570,0rcu_preempt19-21ksoftirqd/110:24:101
81570,0rcu_preempt19-21ksoftirqd/110:18:211
10050570,0irq/346-484840054-21kswapd012:13:120
81560,0rcu_preempt3-21ksoftirqd/009:58:170
81560,0rcu_preempt3-21ksoftirqd/009:58:170
81560,0rcu_preempt19768-21ssh11:39:011
81560,0rcu_preempt19-21ksoftirqd/112:08:031
81560,0rcu_preempt19-21ksoftirqd/107:58:151
10050560,0irq/346-48484000-21swapper/011:03:370
81550,0rcu_preempt3-21ksoftirqd/011:53:180
81550,0rcu_preempt3-21ksoftirqd/010:03:110
81550,0rcu_preempt3-21ksoftirqd/009:55:110
81550,0rcu_preempt3-21ksoftirqd/009:33:100
81550,0rcu_preempt3-21ksoftirqd/009:08:150
81550,0rcu_preempt19685-21ntp_states10:33:160
10050550,0irq/346-484840026812-1kworker/0:1H09:38:150
81540,0rcu_preempt3-21ksoftirqd/011:33:160
81540,0rcu_preempt22863-21apt-get11:43:010
81540,0rcu_preempt20260-21php-cgi09:28:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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