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2026-05-26 - 05:00

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 Tue May 26, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81770,0rcu_preempt54-21kswapd022:57:021
81750,0rcu_preempt19-21ksoftirqd/122:33:121
81740,0rcu_preempt19-21ksoftirqd/122:41:021
81730,0rcu_preempt19-21ksoftirqd/119:36:101
81710,0rcu_preempt851-21rngd23:59:260
81700,0rcu_preempt851-21rngd22:13:470
81660,0rcu_preempt3-21ksoftirqd/022:12:340
81660,0rcu_preempt19-21ksoftirqd/123:38:261
81660,0rcu_preempt19-21ksoftirqd/121:16:341
81650,0rcu_preempt0-21swapper/123:45:021
81640,0rcu_preempt19-21ksoftirqd/122:25:111
81630,0rcu_preempt3-21ksoftirqd/000:13:410
81620,0rcu_preempt19-21ksoftirqd/121:34:441
81620,0rcu_preempt19-21ksoftirqd/100:11:071
10050620,0irq/346-48484000-21swapper/000:26:340
81610,0rcu_preempt19-21ksoftirqd/122:29:141
81610,0rcu_preempt19-21ksoftirqd/121:52:591
81600,0rcu_preempt19-21ksoftirqd/122:18:541
81600,0rcu_preempt0-21swapper/100:00:161
81590,0rcu_preempt54-21kswapd000:20:471
81590,0rcu_preempt3-21ksoftirqd/000:33:020
81590,0rcu_preempt19-21ksoftirqd/122:06:411
81590,0rcu_preempt19-21ksoftirqd/119:11:201
81590,0rcu_preempt19-21ksoftirqd/100:13:231
10050590,0irq/346-48484000-21swapper/021:23:100
81580,0rcu_preempt3405-1kworker/0:0H22:44:010
81580,0rcu_preempt19-21ksoftirqd/121:48:421
81570,0rcu_preempt9518-21kworker/0:121:16:460
81570,0rcu_preempt54-21kswapd000:12:520
81570,0rcu_preempt3-21ksoftirqd/022:33:000
81570,0rcu_preempt22706-21kworker/0:223:37:520
81570,0rcu_preempt19-21ksoftirqd/121:43:161
81570,0rcu_preempt19-21ksoftirqd/121:11:461
9950560,0irq/345-4848400181ktimersoftd/122:43:071
81560,0rcu_preempt32612-21cyclictest23:48:131
81560,0rcu_preempt3-21ksoftirqd/023:18:100
81560,0rcu_preempt19909-21kworker/0:200:18:070
9950550,0irq/345-484840019-21ksoftirqd/121:38:511
81550,0rcu_preempt3-21ksoftirqd/023:48:020
81550,0rcu_preempt19-21ksoftirqd/123:31:501
9950540,0irq/345-484840024270-1kworker/1:0H21:24:371
9950540,0irq/345-48484000-21swapper/023:09:120
9950540,0irq/345-48484000-21swapper/023:09:120
81540,0rcu_preempt3-21ksoftirqd/022:23:190
81540,0rcu_preempt3-21ksoftirqd/020:33:120
81540,0rcu_preempt19-21ksoftirqd/122:08:171
81530,0rcu_preempt3-21ksoftirqd/022:52:100
81530,0rcu_preempt3-21ksoftirqd/000:28:110
81530,0rcu_preempt25364-21apt-get23:38:020
81530,0rcu_preempt0-21swapper/123:12:001
81530,0rcu_preempt0-21swapper/123:12:001
81520,0rcu_preempt3-21ksoftirqd/023:07:090
81520,0rcu_preempt3-21ksoftirqd/022:38:190
81520,0rcu_preempt3-21ksoftirqd/021:48:090
81520,0rcu_preempt3-21ksoftirqd/021:07:510
81520,0rcu_preempt3-21ksoftirqd/019:03:090
81520,0rcu_preempt3-21ksoftirqd/000:03:060
81520,0rcu_preempt19-21ksoftirqd/119:18:411
81520,0rcu_preempt16284-21kworker/0:219:58:250
81520,0rcu_preempt16259-21ping20:18:020
10050520,0irq/346-484840015615-21ssh22:22:110
9950510,0irq/345-484840025582-1kworker/1:3H23:05:091
9950510,0irq/345-484840016251-1kworker/1:3H00:36:541
81510,0rcu_preempt3-21ksoftirqd/023:28:070
81510,0rcu_preempt3-21ksoftirqd/021:53:140
81510,0rcu_preempt3-21ksoftirqd/020:58:120
81510,0rcu_preempt3-21ksoftirqd/020:48:080
81510,0rcu_preempt0-21swapper/120:11:181
81500,0rcu_preempt3-21ksoftirqd/021:42:380
81500,0rcu_preempt21346-21kworker/0:220:15:520
81500,0rcu_preempt19-21ksoftirqd/121:31:591
9950490,0irq/345-484840022763-1kworker/1:2H23:36:241
81490,0rcu_preempt7203-21diskmemload22:59:020
81490,0rcu_preempt54-21kswapd021:58:261
81490,0rcu_preempt3-21ksoftirqd/023:13:050
81490,0rcu_preempt3-21ksoftirqd/022:03:420
81490,0rcu_preempt3-21ksoftirqd/021:47:380
81490,0rcu_preempt3-21ksoftirqd/021:34:000
81490,0rcu_preempt3-21ksoftirqd/021:07:200
81490,0rcu_preempt3-21ksoftirqd/020:28:170
81490,0rcu_preempt3-21ksoftirqd/019:45:320
81490,0rcu_preempt21926-21ssh00:07:321
81490,0rcu_preempt19-21ksoftirqd/122:17:521
81490,0rcu_preempt19-21ksoftirqd/119:58:251
81490,0rcu_preempt10599-21apt-get23:23:020
81480,0rcu_preempt54-21kswapd021:22:210
81480,0rcu_preempt3-21ksoftirqd/023:57:520
81480,0rcu_preempt3-21ksoftirqd/023:43:110
81480,0rcu_preempt3-21ksoftirqd/020:23:490
81480,0rcu_preempt3-21ksoftirqd/020:23:490
81480,0rcu_preempt3-21ksoftirqd/020:10:460
81480,0rcu_preempt3-21ksoftirqd/019:54:560
81470,0rcu_preempt3-21ksoftirqd/021:58:150
81470,0rcu_preempt3-21ksoftirqd/020:04:580
81470,0rcu_preempt1985-21munin-node0
81470,0rcu_preempt19-21ksoftirqd/123:23:181
81470,0rcu_preempt19-21ksoftirqd/120:22:161
81470,0rcu_preempt19-21ksoftirqd/120:03:051
81470,0rcu_preempt19-21ksoftirqd/119:56:111
81470,0rcu_preempt16259-21ping20:17:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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