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2026-07-19 - 22:14

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 Sun Jul 19, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81820,0rcu_preempt19-21ksoftirqd/110:53:491
81820,0rcu_preempt1253-21kworker/1:210:01:461
81800,0rcu_preempt19-21ksoftirqd/109:46:581
81740,0rcu_preempt27122-1kworker/0:1H07:27:240
81740,0rcu_preempt19-21ksoftirqd/109:40:191
81740,0rcu_preempt19-21ksoftirqd/109:24:511
81740,0rcu_preempt0-21swapper/109:19:151
81730,0rcu_preempt19-21ksoftirqd/112:20:331
81730,0rcu_preempt19-21ksoftirqd/112:06:401
81730,0rcu_preempt19-21ksoftirqd/111:40:011
81720,0rcu_preempt0-21swapper/112:35:531
81680,0rcu_preempt19-21ksoftirqd/112:24:521
81680,0rcu_preempt19-21ksoftirqd/111:29:571
81670,0rcu_preempt19-21ksoftirqd/111:43:141
81650,0rcu_preempt19-21ksoftirqd/110:24:181
81650,0rcu_preempt19-21ksoftirqd/110:24:181
81650,0rcu_preempt19-21ksoftirqd/107:41:271
81650,0rcu_preempt19-21ksoftirqd/107:07:171
81630,0rcu_preempt0-21swapper/109:35:281
9950620,0irq/345-4848400181ktimersoftd/110:18:091
9950600,0irq/345-4848400155121kworker/1:2H10:02:081
81600,0rcu_preempt19-21ksoftirqd/110:57:201
81600,0rcu_preempt19-21ksoftirqd/110:51:531
81600,0rcu_preempt19-21ksoftirqd/110:51:531
81590,0rcu_preempt3-21ksoftirqd/010:47:110
81590,0rcu_preempt3-21ksoftirqd/010:47:110
81590,0rcu_preempt19-21ksoftirqd/111:19:201
81590,0rcu_preempt19-21ksoftirqd/110:46:411
81580,0rcu_preempt19-21ksoftirqd/111:22:191
81560,0rcu_preempt3-21ksoftirqd/010:01:280
9950550,0irq/345-484840023096-1kworker/0:3H09:38:510
81550,0rcu_preempt54-21kswapd011:27:100
81550,0rcu_preempt54-21kswapd007:17:260
81550,0rcu_preempt31802-21kworker/0:111:55:310
81540,0rcu_preempt3-21ksoftirqd/010:41:380
81540,0rcu_preempt10239-21kworker/0:011:07:560
10050540,0irq/346-48484000-21swapper/012:06:520
9950530,0irq/345-484840021793-1kworker/1:3H11:47:111
81530,0rcu_preempt3-21ksoftirqd/011:32:090
81530,0rcu_preempt3-21ksoftirqd/008:12:080
81530,0rcu_preempt19-21ksoftirqd/107:57:081
9950520,0irq/345-484840027297-21apt-get11:17:090
81520,0rcu_preempt3-21ksoftirqd/011:40:570
81520,0rcu_preempt3-21ksoftirqd/009:02:020
81520,0rcu_preempt27836-21diskmemload11:12:241
81520,0rcu_preempt19-21ksoftirqd/112:07:261
9950510,0irq/345-48484007098-1kworker/0:0H10:35:440
81510,0rcu_preempt8471-21kworker/0:208:08:400
81510,0rcu_preempt4510-21ping08:17:280
81510,0rcu_preempt3-21ksoftirqd/010:43:420
81510,0rcu_preempt3-21ksoftirqd/007:07:250
81510,0rcu_preempt26954-21kworker/0:110:16:270
10050510,0irq/346-484840027010-1kworker/0:3H10:57:370
9950500,0irq/345-484840054-21kswapd012:32:170
81500,0rcu_preempt409-21kworker/0:210:54:500
81500,0rcu_preempt3-21ksoftirqd/011:47:120
81500,0rcu_preempt3-21ksoftirqd/011:23:100
81500,0rcu_preempt3-21ksoftirqd/010:25:570
81500,0rcu_preempt3-21ksoftirqd/010:25:570
81500,0rcu_preempt3-21ksoftirqd/010:02:110
81500,0rcu_preempt22150-21kworker/0:211:44:150
81500,0rcu_preempt19-21ksoftirqd/109:52:221
81500,0rcu_preempt0-21swapper/109:11:051
10250500,0irq/333-mmc00-21swapper/110:32:151
10050500,0irq/346-4848400549-1kworker/0:2H10:17:170
81490,0rcu_preempt3-21ksoftirqd/012:24:110
81490,0rcu_preempt3-21ksoftirqd/012:12:210
81490,0rcu_preempt3-21ksoftirqd/012:12:210
81490,0rcu_preempt3-21ksoftirqd/010:30:030
81490,0rcu_preempt3-21ksoftirqd/009:48:350
81490,0rcu_preempt3-21ksoftirqd/008:37:260
81490,0rcu_preempt19-21ksoftirqd/108:02:301
10050490,0irq/346-48484009532-1kworker/0:0H11:04:470
9950480,0irq/345-484840024130-21ping07:37:150
81480,0rcu_preempt3-21ksoftirqd/012:31:390
81480,0rcu_preempt3-21ksoftirqd/012:08:170
81480,0rcu_preempt3-21ksoftirqd/011:12:250
81480,0rcu_preempt3-21ksoftirqd/009:52:240
81480,0rcu_preempt3-21ksoftirqd/008:42:170
81480,0rcu_preempt3-21ksoftirqd/008:05:590
81480,0rcu_preempt19-21ksoftirqd/111:04:131
81480,0rcu_preempt19-21ksoftirqd/109:02:171
81480,0rcu_preempt19-21ksoftirqd/107:22:221
81480,0rcu_preempt19-21ksoftirqd/107:17:111
81470,0rcu_preempt4510-21ping08:22:181
81470,0rcu_preempt3-21ksoftirqd/012:17:170
81470,0rcu_preempt3-21ksoftirqd/009:46:570
81470,0rcu_preempt3-21ksoftirqd/009:26:410
81470,0rcu_preempt3-21ksoftirqd/008:47:310
81470,0rcu_preempt3-21ksoftirqd/008:36:120
81470,0rcu_preempt3-21ksoftirqd/007:02:160
81470,0rcu_preempt27836-21diskmemload11:09:091
81470,0rcu_preempt21272-21ntpq09:32:250
81470,0rcu_preempt19-21ksoftirqd/111:32:251
81470,0rcu_preempt19-21ksoftirqd/107:47:151
81470,0rcu_preempt19-21ksoftirqd/107:32:501
81470,0rcu_preempt15426-21memory08:27:211
9950460,0irq/345-484840031679-1kworker/0:2H11:59:050
81460,0rcu_preempt560-21taskset09:12:070
81460,0rcu_preempt3-21ksoftirqd/009:27:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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