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2026-06-21 - 08:31

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 highest latencies:
System rackaslot5s.osadl.org (updated Sun Jun 21, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt19-21ksoftirqd/123:32:441
81830,0rcu_preempt19-21ksoftirqd/123:42:411
81820,0rcu_preempt19-21ksoftirqd/122:25:431
10050820,0irq/346-484840021752-21ssh23:22:370
81810,0rcu_preempt19-21ksoftirqd/122:50:081
81730,0rcu_preempt3-21ksoftirqd/000:35:210
81730,0rcu_preempt19-21ksoftirqd/123:08:071
81720,0rcu_preempt3-21ksoftirqd/022:47:440
81710,0rcu_preempt3-21ksoftirqd/022:04:360
81680,0rcu_preempt54-21kswapd000:00:490
81680,0rcu_preempt3-21ksoftirqd/022:36:000
81680,0rcu_preempt3-21ksoftirqd/000:09:230
81660,0rcu_preempt19-21ksoftirqd/121:45:241
81640,0rcu_preempt851-21rngd00:07:240
81630,0rcu_preempt25794-21ping19:57:260
81630,0rcu_preempt19-21ksoftirqd/123:52:411
81630,0rcu_preempt19-21ksoftirqd/123:31:341
81620,0rcu_preempt19-21ksoftirqd/123:06:571
81620,0rcu_preempt19-21ksoftirqd/121:30:091
81620,0rcu_preempt19-21ksoftirqd/119:57:441
81610,0rcu_preempt26121-21kworker/u4:022:57:350
81600,0rcu_preempt3-21ksoftirqd/020:02:350
81600,0rcu_preempt19-21ksoftirqd/120:13:481
10050600,0irq/346-484840054-21kswapd023:27:420
81590,0rcu_preempt3-21ksoftirqd/020:47:400
81590,0rcu_preempt19-21ksoftirqd/122:17:411
81580,0rcu_preempt3-21ksoftirqd/021:42:430
81580,0rcu_preempt19-21ksoftirqd/100:21:411
81560,0rcu_preempt19-21ksoftirqd/122:55:471
10050560,0irq/346-484840054-21kswapd021:57:310
10050560,0irq/346-48484001505-1kworker/0:0H23:02:300
81550,0rcu_preempt3-21ksoftirqd/022:10:050
81550,0rcu_preempt3-21ksoftirqd/021:32:410
81550,0rcu_preempt19-21ksoftirqd/121:10:261
10050550,0irq/346-484840054-21kswapd022:17:330
10050550,0irq/346-484840024490-1kworker/0:0H23:32:420
10050550,0irq/346-484840014690-1kworker/0:3H21:20:160
81540,0rcu_preempt8548-21apt-get20:42:370
81540,0rcu_preempt3-21ksoftirqd/021:22:480
81540,0rcu_preempt3-21ksoftirqd/020:32:420
81540,0rcu_preempt3-21ksoftirqd/000:32:150
10050540,0irq/346-484840021868-1kworker/0:1H21:47:360
10050540,0irq/346-48484000-21swapper/023:12:370
81530,0rcu_preempt3-21ksoftirqd/023:42:300
81530,0rcu_preempt3-21ksoftirqd/023:37:490
81530,0rcu_preempt3-21ksoftirqd/022:52:430
81530,0rcu_preempt3-21ksoftirqd/022:27:430
81530,0rcu_preempt19-21ksoftirqd/121:37:091
161552530,0chrt10050irq/346-484840019:27:170
960499522,0cyclictest0-21swapper/020:17:430
81520,0rcu_preempt3-21ksoftirqd/000:12:410
81520,0rcu_preempt26205-21kworker/0:019:47:480
81520,0rcu_preempt19-21ksoftirqd/122:42:011
81520,0rcu_preempt19-21ksoftirqd/122:12:491
81520,0rcu_preempt13028-21kworker/0:021:11:350
81520,0rcu_preempt0-21swapper/120:10:481
10050520,0irq/346-484840029295-1kworker/0:2H22:24:480
10050520,0irq/346-484840011916-1kworker/0:1H22:43:200
10050520,0irq/346-48484000-21swapper/023:47:340
81510,0rcu_preempt3-21ksoftirqd/021:52:470
81510,0rcu_preempt3-21ksoftirqd/021:52:470
81510,0rcu_preempt3-21ksoftirqd/021:31:190
81510,0rcu_preempt3-21ksoftirqd/000:22:430
81510,0rcu_preempt19-21ksoftirqd/123:58:431
81510,0rcu_preempt19-21ksoftirqd/120:19:431
81510,0rcu_preempt0-21swapper/121:16:551
81500,0rcu_preempt3-21ksoftirqd/023:52:430
81500,0rcu_preempt3-21ksoftirqd/021:37:490
81500,0rcu_preempt25794-21ping20:07:450
81500,0rcu_preempt19-21ksoftirqd/122:34:041
81500,0rcu_preempt19-21ksoftirqd/121:17:431
81500,0rcu_preempt19-21ksoftirqd/120:22:511
10050500,0irq/346-48484009232-21apt-get22:37:370
10050500,0irq/346-484840054-21kswapd023:19:310
10050500,0irq/346-48484000-21swapper/000:17:320
81490,0rcu_preempt3-21ksoftirqd/023:07:590
81490,0rcu_preempt3-21ksoftirqd/019:52:420
10050490,0irq/346-48484004415-1kworker/0:1H22:12:420
10050490,0irq/346-48484003-21ksoftirqd/019:17:260
10050490,0irq/346-48484003-21ksoftirqd/019:17:260
10050490,0irq/346-48484000-21swapper/021:16:370
81480,0rcu_preempt19-21ksoftirqd/120:42:491
13250480,0irq/301-48020008094-21munin-node0
10050480,0irq/346-484840013029-1kworker/0:1H20:57:260
81470,0rcu_preempt6835-21ssh22:02:381
81470,0rcu_preempt3-21ksoftirqd/020:57:370
81470,0rcu_preempt19-21ksoftirqd/122:28:011
81470,0rcu_preempt19-21ksoftirqd/119:07:171
81470,0rcu_preempt17444-21ntp_states00:22:501
81460,0rcu_preempt3-21ksoftirqd/020:37:520
81460,0rcu_preempt19-21ksoftirqd/122:42:451
81460,0rcu_preempt19-21ksoftirqd/121:22:381
81460,0rcu_preempt19-21ksoftirqd/119:56:371
81460,0rcu_preempt19-21ksoftirqd/119:42:471
81460,0rcu_preempt19-21ksoftirqd/119:35:081
81460,0rcu_preempt19-21ksoftirqd/119:30:131
81460,0rcu_preempt16620-21diskmemload23:50:271
10050460,0irq/346-484840031084-21munin-node0
81450,0rcu_preempt3-21ksoftirqd/020:24:150
81450,0rcu_preempt19-21ksoftirqd/123:20:201
81450,0rcu_preempt19-21ksoftirqd/123:12:441
81450,0rcu_preempt19-21ksoftirqd/120:05:471
81450,0rcu_preempt19-21ksoftirqd/119:40:521
81450,0rcu_preempt19-21ksoftirqd/119:40:521
81450,0rcu_preempt19-21ksoftirqd/119:18:491
81450,0rcu_preempt19-21ksoftirqd/100:12:551
81440,0rcu_preempt3-21ksoftirqd/020:27:480
81440,0rcu_preempt24308-21ssh21:47:381
81440,0rcu_preempt19-21ksoftirqd/123:37:361
81440,0rcu_preempt19-21ksoftirqd/120:34:511
81440,0rcu_preempt19-21ksoftirqd/100:11:211
81440,0rcu_preempt10419-21ntp_states19:07:490
10050440,0irq/346-484840020791-1kworker/0:2H19:42:480
81430,0rcu_preempt54-21kswapd021:02:490
81430,0rcu_preempt19-21ksoftirqd/121:57:521
81430,0rcu_preempt19-21ksoftirqd/120:57:501
81430,0rcu_preempt19-21ksoftirqd/119:49:451
81430,0rcu_preempt12885-21ping19:17:350
10050430,0irq/346-484840019346-21runrttasks19:36:300
81420,0rcu_preempt20466-21kworker/1:121:40:121
81420,0rcu_preempt19-21ksoftirqd/123:24:101
81420,0rcu_preempt19-21ksoftirqd/119:22:361
9950410,0irq/345-48484000-21swapper/019:27:470
81410,0rcu_preempt19-21ksoftirqd/122:57:451
81410,0rcu_preempt19-21ksoftirqd/119:12:511
81410,0rcu_preempt19-21ksoftirqd/119:12:511
81410,0rcu_preempt19-21ksoftirqd/100:27:571
81400,0rcu_preempt19-21ksoftirqd/122:07:421
81400,0rcu_preempt19-21ksoftirqd/121:53:421
81400,0rcu_preempt19-21ksoftirqd/121:53:421
81400,0rcu_preempt19-21ksoftirqd/120:38:311
81400,0rcu_preempt19-21ksoftirqd/100:33:141
81400,0rcu_preempt15126-21munin-node1
81400,0rcu_preempt13031-1kworker/1:3H20:56:161
81390,0rcu_preempt19-21ksoftirqd/120:48:411
81390,0rcu_preempt19-21ksoftirqd/119:07:431
81390,0rcu_preempt19-21ksoftirqd/100:02:561
81390,0rcu_preempt12885-21ping19:39:500
81390,0rcu_preempt12885-21ping19:39:500
81380,0rcu_preempt19-21ksoftirqd/120:31:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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