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2025-12-03 - 04:23

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 Wed Dec 03, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1107921010,0sleep010050irq/346-484840020:30:300
81930,0rcu_preempt32556-21apt-get21:59:350
78042910,0sleep010050irq/346-484840020:20:230
81900,0rcu_preempt3-21ksoftirqd/021:19:450
81900,0rcu_preempt16032-21cyclictest21:12:450
81880,0rcu_preempt3-21ksoftirqd/023:59:260
81880,0rcu_preempt3-21ksoftirqd/022:19:380
81870,0rcu_preempt3-21ksoftirqd/022:04:350
81870,0rcu_preempt3-21ksoftirqd/019:59:570
81870,0rcu_preempt3-21ksoftirqd/000:34:370
81820,0rcu_preempt3-21ksoftirqd/022:19:250
81810,0rcu_preempt3-21ksoftirqd/022:09:260
81790,0rcu_preempt3-21ksoftirqd/023:34:370
81790,0rcu_preempt3-21ksoftirqd/000:19:360
81780,0rcu_preempt3-21ksoftirqd/023:44:050
81740,0rcu_preempt3-21ksoftirqd/023:04:550
81740,0rcu_preempt3-21ksoftirqd/021:43:540
81740,0rcu_preempt3-21ksoftirqd/021:39:230
81740,0rcu_preempt3-21ksoftirqd/021:19:240
81730,0rcu_preempt3-21ksoftirqd/023:24:250
81730,0rcu_preempt3-21ksoftirqd/020:24:540
81730,0rcu_preempt3-21ksoftirqd/020:24:540
81710,0rcu_preempt3-21ksoftirqd/021:24:480
10050710,0irq/346-4848400171rcuc/123:20:221
81690,0rcu_preempt751-21rngd23:33:190
81690,0rcu_preempt3-21ksoftirqd/023:56:360
10050680,0irq/346-4848400171rcuc/121:23:441
9950670,0irq/345-4848400171rcuc/121:18:051
81670,0rcu_preempt26912-21apt-get23:49:380
81670,0rcu_preempt16032-21cyclictest20:16:310
236292670,0chrt9950irq/345-484840023:44:540
81660,0rcu_preempt9950irq/345-484840000:08:091
81660,0rcu_preempt3-21ksoftirqd/021:29:360
81650,0rcu_preempt3-21ksoftirqd/000:14:400
81650,0rcu_preempt3-21ksoftirqd/000:14:400
81640,0rcu_preempt3-21ksoftirqd/021:53:180
10050640,0irq/346-4848400171rcuc/123:06:271
81630,0rcu_preempt3-21ksoftirqd/023:00:020
81630,0rcu_preempt3-21ksoftirqd/023:00:020
98682620,0sleep09950irq/345-484840023:29:200
81620,0rcu_preempt17039-21kworker/0:223:17:290
81610,0rcu_preempt21671-21diskstats21:04:410
81610,0rcu_preempt21671-21diskstats21:04:410
10050610,0irq/346-48484004499-1kworker/0:2H00:24:550
10050610,0irq/346-48484004499-1kworker/0:2H00:24:550
81600,0rcu_preempt3-21ksoftirqd/022:49:370
81600,0rcu_preempt3-21ksoftirqd/022:39:560
81580,0rcu_preempt3-21ksoftirqd/022:57:210
81580,0rcu_preempt3-21ksoftirqd/019:29:570
10050580,0irq/346-484840054-21kswapd000:32:151
81570,0rcu_preempt3-21ksoftirqd/019:44:360
81570,0rcu_preempt3-21ksoftirqd/019:24:550
81570,0rcu_preempt3-21ksoftirqd/000:04:460
81560,0rcu_preempt19-21ksoftirqd/122:19:251
32182560,0sleep010050irq/346-484840020:08:590
32182560,0sleep010050irq/346-484840020:08:590
10050560,0irq/346-484840014835-21ssh21:38:031
81550,0rcu_preempt3-21ksoftirqd/022:29:240
10050550,0irq/346-48484008444-21ssh22:09:351
10050550,0irq/346-484840054-21kswapd022:25:431
10050550,0irq/346-48484003-21ksoftirqd/019:19:260
81540,0rcu_preempt3-21ksoftirqd/022:34:460
81540,0rcu_preempt3-21ksoftirqd/020:39:430
81540,0rcu_preempt3-21ksoftirqd/019:54:460
81540,0rcu_preempt22216-1kworker/0:1H21:55:430
198392540,0sleep19950irq/345-484840022:22:591
10050540,0irq/346-48484008332-21ssh22:48:140
10050540,0irq/346-484840054-21kswapd023:45:311
10050540,0irq/346-484840054-21kswapd022:48:001
81530,0rcu_preempt19-21ksoftirqd/123:31:201
81530,0rcu_preempt19-21ksoftirqd/100:18:171
81530,0rcu_preempt19-21ksoftirqd/100:18:171
10050530,0irq/346-48484004499-1kworker/0:2H00:10:430
81520,0rcu_preempt3-21ksoftirqd/020:09:370
81520,0rcu_preempt23095-1kworker/0:2H22:29:530
10050520,0irq/346-484840054-21kswapd023:40:051
81510,0rcu_preempt3-21ksoftirqd/023:09:480
81510,0rcu_preempt3-21ksoftirqd/019:09:500
81510,0rcu_preempt3-21ksoftirqd/000:29:360
10050510,0irq/346-4848400751-21rngd19:39:260
10050510,0irq/346-484840028062-1kworker/1:0H23:11:501
10050510,0irq/346-484840025241-1kworker/1:2H21:14:021
10050510,0irq/346-484840018049-1kworker/0:0H21:45:590
10050500,0irq/346-484840054-21kswapd021:45:281
10050500,0irq/346-48484003413-1kworker/1:2H23:35:461
10050500,0irq/346-48484002576-21ssh22:40:301
10050490,0irq/346-48484009325-21ssh21:30:521
10050490,0irq/346-48484006421-1kworker/1:0H22:07:201
10050490,0irq/346-484840054-21kswapd022:35:311
10050490,0irq/346-484840018235-21ssh21:41:431
10050490,0irq/346-484840011659-21ssh00:10:021
81480,0rcu_preempt3-21ksoftirqd/019:49:400
81480,0rcu_preempt23892-1kworker/0:0H19:39:270
81480,0rcu_preempt18166-21apt-get20:54:350
81480,0rcu_preempt14056-1kworker/0:2H19:20:020
10050480,0irq/346-484840030598-21ssh23:54:041
10050480,0irq/346-484840026358-1kworker/1:1H21:52:101
81470,0rcu_preempt19-21ksoftirqd/119:24:571
10050470,0irq/346-4848400482-21ssh23:56:031
10050470,0irq/346-484840016140-21ssh22:57:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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