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2026-03-28 - 11:11

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Sat Mar 28, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt3-21ksoftirqd/022:26:190
81970,0rcu_preempt19-21ksoftirqd/121:18:371
81960,0rcu_preempt3-21ksoftirqd/023:44:550
81940,0rcu_preempt19-21ksoftirqd/122:16:321
81880,0rcu_preempt54-21kswapd023:09:151
81860,0rcu_preempt19-21ksoftirqd/122:44:341
81850,0rcu_preempt19-21ksoftirqd/121:43:491
81840,0rcu_preempt19-21ksoftirqd/121:20:291
81840,0rcu_preempt19-21ksoftirqd/120:14:071
81830,0rcu_preempt19-21ksoftirqd/121:54:071
10050830,0irq/346-4848400111rcuc/021:53:300
81800,0rcu_preempt23027-1kworker/dying23:01:111
81750,0rcu_preempt3-21ksoftirqd/022:41:250
81740,0rcu_preempt19-21ksoftirqd/122:37:171
10050740,0irq/346-484840041ktimersoftd/023:30:360
81730,0rcu_preempt3-21ksoftirqd/021:45:000
81730,0rcu_preempt3-21ksoftirqd/000:03:410
10050730,0irq/346-484840041ktimersoftd/022:50:410
81720,0rcu_preempt29924-21kworker/0:100:24:120
81700,0rcu_preempt3-21ksoftirqd/023:11:150
10050700,0irq/346-484840041ktimersoftd/000:31:210
81690,0rcu_preempt3-21ksoftirqd/022:32:430
81690,0rcu_preempt19-21ksoftirqd/122:49:091
81690,0rcu_preempt19-21ksoftirqd/120:38:451
1595599691,0cyclictest23461-21sh21:09:030
81670,0rcu_preempt19-21ksoftirqd/123:31:031
81660,0rcu_preempt54-21kswapd021:34:260
81660,0rcu_preempt24034-21kworker/0:119:48:590
81660,0rcu_preempt19-21ksoftirqd/100:30:081
81650,0rcu_preempt0-21swapper/100:22:131
81650,0rcu_preempt0-21swapper/100:22:131
1595599653,0cyclictest0-21swapper/023:25:270
1595599653,0cyclictest0-21swapper/023:25:270
10050650,0irq/346-484840054-21kswapd021:32:301
81640,0rcu_preempt3-21ksoftirqd/020:19:080
81630,0rcu_preempt3-21ksoftirqd/021:55:370
81630,0rcu_preempt19-21ksoftirqd/123:44:151
1595599635,0cyclictest216912sleep022:12:350
1595599632,0cyclictest0-21swapper/021:22:280
81620,0rcu_preempt19-21ksoftirqd/100:07:191
1595599627,0cyclictest3052650kworker/0:1H22:21:550
15955996211,0cyclictest25981-21aten_rapower_cu19:39:000
10050620,0irq/346-4848400181ktimersoftd/122:00:131
1595599612,0cyclictest20987-21munin-node0
15955996110,0cyclictest23910-21munin-node0
10050610,0irq/346-484840027052-1kworker/1:3H23:57:141
1595599607,0cyclictest19236-21ping19:34:090
1595599603,0cyclictest0-21swapper/023:02:470
1595599602,0cyclictest13302-21idleruntime22:04:060
1595599602,0cyclictest0-21swapper/022:02:110
15955996010,0cyclictest0-21swapper/019:24:090
1595599592,0cyclictest4156-21ssh00:04:470
1595599591,0cyclictest0-21swapper/000:34:080
10050590,0irq/346-4848400851-21rngd00:14:330
81580,0rcu_preempt21453-21apt-get21:03:570
81580,0rcu_preempt19-21ksoftirqd/122:55:581
1595599585,0cyclictest0-21swapper/023:13:590
15955995815,0cyclictest12695-21ssh21:30:220
15955995813,0cyclictest0-21swapper/022:55:530
1595599581,0cyclictest7512-21runrttasks21:25:040
1595599581,0cyclictest24989-21apt-get23:53:570
10050580,0irq/346-48484008080-1kworker/1:1H22:33:401
10050580,0irq/346-484840015565-1kworker/1:1H22:09:191
1595599572,0cyclictest18498-21munin-node0
1595599572,0cyclictest0-21swapper/023:51:580
1595599572,0cyclictest0-21swapper/023:20:200
15955995710,0cyclictest0-21swapper/023:35:250
15955995710,0cyclictest0-21swapper/023:35:250
10050570,0irq/346-484840032045-1kworker/1:0H00:01:261
10050570,0irq/346-484840010457-1kworker/1:1H23:15:331
81560,0rcu_preempt0-21swapper/123:19:081
1595599563,0cyclictest0-21swapper/022:46:070
1595599562,0cyclictest0-21swapper/023:04:300
15955995614,0cyclictest0-21swapper/020:09:150
81550,0rcu_preempt0-21swapper/121:50:391
81550,0rcu_preempt0-21swapper/120:19:061
1595599552,0cyclictest19236-21ping19:44:000
1595599552,0cyclictest0-21swapper/023:40:270
1595599552,0cyclictest0-21swapper/022:36:040
15955995512,0cyclictest0-21swapper/000:18:490
15955995512,0cyclictest0-21swapper/000:18:490
10050550,0irq/346-48484007165-1kworker/1:1H23:35:571
10050550,0irq/346-48484007165-1kworker/1:1H23:35:571
10050550,0irq/346-484840054-21kswapd021:13:490
10050550,0irq/346-48484002001-1kworker/1:2H00:37:071
10050550,0irq/346-484840012147-1kworker/1:3H23:40:311
81540,0rcu_preempt19-21ksoftirqd/100:10:241
81540,0rcu_preempt0-21swapper/122:24:291
1595599541,0cyclictest19236-21ping19:19:040
1595599541,0cyclictest1735-21apt-get20:03:580
10050540,0irq/346-48484008080-1kworker/1:1H22:39:131
10050540,0irq/346-484840021026-1kworker/1:3H21:10:151
81530,0rcu_preempt16100-21apt-get19:08:580
81530,0rcu_preempt0-21swapper/100:18:401
1595599534,0cyclictest22728-21aten_rapower_en19:29:020
1595599532,0cyclictest0-21swapper/000:11:480
10050530,0irq/346-48484003211-1kworker/1:0H21:24:531
10050530,0irq/346-484840018140-1kworker/1:2H21:38:131
10050530,0irq/346-484840015565-1kworker/1:1H22:07:561
10050530,0irq/346-484840010457-1kworker/1:1H23:07:211
81520,0rcu_preempt3-21ksoftirqd/020:34:040
81520,0rcu_preempt19-21ksoftirqd/120:03:581
1595599522,0cyclictest0-21swapper/020:14:030
1595599521,0cyclictest319952chrt19:55:150
81510,0rcu_preempt3-21ksoftirqd/020:26:050
81510,0rcu_preempt19-21ksoftirqd/119:04:091
81510,0rcu_preempt0-21swapper/120:24:141
10050510,0irq/346-484840054-21kswapd022:19:171
10050510,0irq/346-484840017138-1kworker/1:0H23:53:271
81500,0rcu_preempt19-21ksoftirqd/120:08:581
10050490,0irq/346-484840019528-1kworker/1:0H00:23:581
81480,0rcu_preempt3-21ksoftirqd/020:49:570
10050480,0irq/346-48484001339-21snmpd19:40:191
81470,0rcu_preempt3-21ksoftirqd/020:44:080
81470,0rcu_preempt3-21ksoftirqd/020:39:120
81470,0rcu_preempt19818-21apt-get20:58:590
81470,0rcu_preempt19-21ksoftirqd/119:30:131
81470,0rcu_preempt0-21swapper/120:54:041
10050470,0irq/346-484840023851-1kworker/1:1H19:34:111
10050470,0irq/346-484840022621-21ssh21:40:191
81460,0rcu_preempt3-21ksoftirqd/020:29:130
81460,0rcu_preempt3-21ksoftirqd/019:59:050
81460,0rcu_preempt3-21ksoftirqd/019:59:050
81460,0rcu_preempt19-21ksoftirqd/119:58:581
81460,0rcu_preempt19-21ksoftirqd/119:58:581
81460,0rcu_preempt0-21swapper/020:56:570
10050460,0irq/346-484840027605-21ssh23:23:551
10050460,0irq/346-484840027605-21ssh23:23:551
10050460,0irq/346-484840019236-21ping19:22:331
81450,0rcu_preempt19-21ksoftirqd/119:44:151
81440,0rcu_preempt19-21ksoftirqd/120:44:131
81440,0rcu_preempt19-21ksoftirqd/119:57:151
81430,0rcu_preempt19-21ksoftirqd/119:24:121
81420,0rcu_preempt19-21ksoftirqd/121:04:081
81410,0rcu_preempt19-21ksoftirqd/120:29:051
158362410,0sleep013983-1kworker/0:1H19:07:510
81400,0rcu_preempt2377-21kworker/1:019:11:141
81400,0rcu_preempt19-21ksoftirqd/120:49:091
81400,0rcu_preempt19-21ksoftirqd/119:53:481
81380,0rcu_preempt19-21ksoftirqd/119:13:511
81370,0rcu_preempt19-21ksoftirqd/120:59:101
81370,0rcu_preempt19-21ksoftirqd/120:43:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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