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2025-07-19 - 22:28

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 Sat Jul 19, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt19-21ksoftirqd/110:04:071
81770,0rcu_preempt19-21ksoftirqd/107:27:131
10050770,0irq/346-484840022841-21ssh09:48:040
81750,0rcu_preempt3-21ksoftirqd/011:39:450
81740,0rcu_preempt3714-21ssh11:16:150
81740,0rcu_preempt3-21ksoftirqd/010:14:090
81730,0rcu_preempt6821-21irqstats10:06:581
81730,0rcu_preempt3-21ksoftirqd/010:18:390
81730,0rcu_preempt3-21ksoftirqd/009:59:590
81730,0rcu_preempt3-21ksoftirqd/009:59:590
81720,0rcu_preempt3-21ksoftirqd/012:25:070
81720,0rcu_preempt3-21ksoftirqd/011:04:490
81720,0rcu_preempt3-21ksoftirqd/009:09:180
81720,0rcu_preempt19-21ksoftirqd/110:16:361
81710,0rcu_preempt3-21ksoftirqd/010:58:450
81710,0rcu_preempt3-21ksoftirqd/010:39:520
81710,0rcu_preempt3-21ksoftirqd/010:22:000
81710,0rcu_preempt3-21ksoftirqd/010:22:000
9950700,0irq/345-48484001513-21if_eth209:21:590
81700,0rcu_preempt3-21ksoftirqd/012:18:280
81700,0rcu_preempt3-21ksoftirqd/011:24:200
81700,0rcu_preempt3-21ksoftirqd/010:45:400
81700,0rcu_preempt3-21ksoftirqd/009:28:330
81690,0rcu_preempt3-21ksoftirqd/011:53:460
81690,0rcu_preempt3-21ksoftirqd/009:53:270
81690,0rcu_preempt3-21ksoftirqd/009:43:400
81690,0rcu_preempt3-21ksoftirqd/009:39:270
81690,0rcu_preempt19-21ksoftirqd/110:47:061
81680,0rcu_preempt3-21ksoftirqd/010:53:590
9950650,0irq/345-48484000-21swapper/010:05:440
81650,0rcu_preempt10339-21irqstats08:31:580
81640,0rcu_preempt3-21ksoftirqd/011:43:010
81630,0rcu_preempt3-21ksoftirqd/011:30:160
81630,0rcu_preempt3-21ksoftirqd/011:11:310
81630,0rcu_preempt19-21ksoftirqd/109:33:021
81630,0rcu_preempt19-21ksoftirqd/108:27:031
9950620,0irq/345-48484000-21swapper/010:33:030
81610,0rcu_preempt19-21ksoftirqd/111:01:551
81610,0rcu_preempt19-21ksoftirqd/108:17:041
81590,0rcu_preempt19-21ksoftirqd/108:23:501
81590,0rcu_preempt12469-21kworker/0:207:41:540
81570,0rcu_preempt19-21ksoftirqd/112:24:261
10050570,0irq/346-48484006568-21ssh10:06:550
81560,0rcu_preempt3-21ksoftirqd/009:14:490
81560,0rcu_preempt3-21ksoftirqd/008:13:390
81560,0rcu_preempt19-21ksoftirqd/110:57:571
81560,0rcu_preempt12469-21kworker/0:207:16:490
81550,0rcu_preempt3-21ksoftirqd/012:06:260
10050550,0irq/346-484840054-21kswapd010:47:110
10050550,0irq/346-48484000-21swapper/011:16:470
81540,0rcu_preempt3-21ksoftirqd/011:31:520
81540,0rcu_preempt3-21ksoftirqd/007:06:530
81540,0rcu_preempt19-21ksoftirqd/111:11:501
81540,0rcu_preempt10050irq/346-484840007:25:470
81530,0rcu_preempt3-21ksoftirqd/011:50:140
81530,0rcu_preempt16501-21irqstats07:11:590
81520,0rcu_preempt3-21ksoftirqd/012:06:520
81520,0rcu_preempt3-21ksoftirqd/008:56:520
4350520,0irq/32-4330000054-21kswapd012:26:540
81510,0rcu_preempt3-21ksoftirqd/012:33:130
81510,0rcu_preempt3-21ksoftirqd/008:21:570
81510,0rcu_preempt3-21ksoftirqd/008:10:280
81510,0rcu_preempt3-21ksoftirqd/008:10:280
81510,0rcu_preempt3-21ksoftirqd/008:01:510
10050510,0irq/346-484840017421-1kworker/0:2H09:03:000
81500,0rcu_preempt3-21ksoftirqd/011:56:520
81500,0rcu_preempt3-21ksoftirqd/008:37:010
81500,0rcu_preempt19-21ksoftirqd/111:56:031
81500,0rcu_preempt19-21ksoftirqd/110:44:521
81500,0rcu_preempt0-21swapper/108:01:591
81490,0rcu_preempt3-21ksoftirqd/009:16:470
81490,0rcu_preempt3-21ksoftirqd/007:56:430
81480,0rcu_preempt54-21kswapd010:27:210
81480,0rcu_preempt3-21ksoftirqd/012:14:200
81480,0rcu_preempt3-21ksoftirqd/008:46:480
81480,0rcu_preempt3-21ksoftirqd/008:41:540
81480,0rcu_preempt19-21ksoftirqd/107:25:481
81480,0rcu_preempt12724-21apt-get07:01:490
10050480,0irq/346-48484000-21swapper/009:36:010
81470,0rcu_preempt19-21ksoftirqd/112:12:081
81470,0rcu_preempt19-21ksoftirqd/109:36:511
81470,0rcu_preempt19-21ksoftirqd/107:56:501
10050470,0irq/346-48484003-21ksoftirqd/007:33:450
81460,0rcu_preempt3-21ksoftirqd/008:18:220
81460,0rcu_preempt3-21ksoftirqd/007:51:510
81460,0rcu_preempt19-21ksoftirqd/111:21:551
81460,0rcu_preempt19-21ksoftirqd/108:07:061
81460,0rcu_preempt19-21ksoftirqd/108:07:061
81450,0rcu_preempt19-21ksoftirqd/112:19:081
81450,0rcu_preempt19-21ksoftirqd/110:25:041
81450,0rcu_preempt19-21ksoftirqd/110:25:041
81450,0rcu_preempt19-21ksoftirqd/107:42:131
81450,0rcu_preempt19-21ksoftirqd/107:32:051
10050450,0irq/346-484840054-21kswapd007:48:480
81440,0rcu_preempt8213-21apt-get08:26:500
81440,0rcu_preempt54-21kswapd007:31:360
81440,0rcu_preempt32082-1kworker/1:2H12:06:391
81440,0rcu_preempt19-21ksoftirqd/111:49:011
81440,0rcu_preempt19-21ksoftirqd/111:40:021
81440,0rcu_preempt19-21ksoftirqd/110:29:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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