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2026-07-14 - 07:35

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 Tue Jul 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811580,0rcu_preempt3-21ksoftirqd/023:09:210
811570,0rcu_preempt3-21ksoftirqd/021:22:580
811340,0rcu_preempt3-21ksoftirqd/023:48:220
81850,0rcu_preempt3-21ksoftirqd/022:50:370
81850,0rcu_preempt3-21ksoftirqd/022:42:130
81830,0rcu_preempt3-21ksoftirqd/023:57:050
81830,0rcu_preempt3-21ksoftirqd/000:32:150
81830,0rcu_preempt3-21ksoftirqd/000:32:150
81820,0rcu_preempt54-21kswapd000:27:140
81810,0rcu_preempt3-21ksoftirqd/021:42:270
81810,0rcu_preempt3-21ksoftirqd/020:47:280
81800,0rcu_preempt3-21ksoftirqd/021:33:010
81800,0rcu_preempt3-21ksoftirqd/021:17:290
10050790,0irq/346-484840054-21kswapd022:15:570
81780,0rcu_preempt3-21ksoftirqd/021:37:200
81780,0rcu_preempt3-21ksoftirqd/021:37:200
10050760,0irq/346-484840016875-1kworker/0:2H21:55:080
81750,0rcu_preempt3-21ksoftirqd/022:52:240
81750,0rcu_preempt3-21ksoftirqd/021:14:240
10050750,0irq/346-484840054-21kswapd023:45:490
10050740,0irq/346-484840054-21kswapd000:07:210
81730,0rcu_preempt3-21ksoftirqd/022:20:560
10050720,0irq/346-484840054-21kswapd000:19:540
81710,0rcu_preempt54-21kswapd023:02:010
81700,0rcu_preempt3-21ksoftirqd/022:25:570
81700,0rcu_preempt15269-21wget19:22:230
10050690,0irq/346-48484002968-1kworker/0:2H23:03:360
81680,0rcu_preempt3-21ksoftirqd/021:47:290
81680,0rcu_preempt3-21ksoftirqd/021:47:290
81650,0rcu_preempt3-21ksoftirqd/022:07:320
81640,0rcu_preempt3-21ksoftirqd/022:27:210
81630,0rcu_preempt851-21rngd22:36:330
13250630,0irq/301-480200017411-21ssh21:07:170
10050630,0irq/346-48484007327-1kworker/0:1H00:22:510
9950620,0irq/345-484840026122-21ping20:17:031
9950620,0irq/345-484840026122-21ping20:17:031
10050620,0irq/346-4848400171rcuc/122:54:041
10050620,0irq/346-484840010608-1kworker/0:0H22:38:330
81610,0rcu_preempt3-21ksoftirqd/019:12:310
81610,0rcu_preempt1350-21lldpd21:02:210
10050610,0irq/346-4848400171rcuc/122:15:561
81590,0rcu_preempt3-21ksoftirqd/019:47:310
10050590,0irq/346-4848400181ktimersoftd/123:27:161
991999572,0cyclictest5855-21apt-get23:07:141
81570,0rcu_preempt16913-21diskmemload00:05:190
10050570,0irq/346-484840054-21kswapd022:57:161
991999552,0cyclictest0-21swapper/121:30:201
81550,0rcu_preempt3-21ksoftirqd/023:17:220
10050550,0irq/346-48484006992-1kworker/1:2H21:34:321
10050550,0irq/346-48484000-21swapper/023:52:280
991999542,0cyclictest26485-21munin-node1
10050540,0irq/346-484840054-21kswapd023:38:580
10050530,0irq/346-484840010756-21ssh23:12:100
991999522,0cyclictest0-21swapper/123:14:461
9919995219,0cyclictest3938-21munin-node1
81520,0rcu_preempt3-21ksoftirqd/022:07:040
81520,0rcu_preempt3-21ksoftirqd/019:44:290
10050520,0irq/346-484840054-21kswapd023:32:590
10050520,0irq/346-48484000-21swapper/021:28:330
991999512,0cyclictest18505-21apt-get22:47:141
991999512,0cyclictest13781-21ssh00:20:451
81510,0rcu_preempt851-21rngd20:02:391
81510,0rcu_preempt19-21ksoftirqd/123:41:321
81510,0rcu_preempt19-21ksoftirqd/121:56:071
991999503,0cyclictest2967-1kworker/1:1H23:04:161
991999501,0cyclictest5871-21meminfo00:12:271
81500,0rcu_preempt19-21ksoftirqd/120:23:561
81500,0rcu_preempt19-21ksoftirqd/120:17:341
81500,0rcu_preempt19-21ksoftirqd/119:22:561
81500,0rcu_preempt18812-21kworker/u4:219:02:081
10050500,0irq/346-484840054-21kswapd023:47:541
10050500,0irq/346-484840054-21kswapd023:29:300
10050500,0irq/346-484840054-21kswapd023:17:471
10050500,0irq/346-484840024925-1kworker/0:2H00:16:160
991999493,0cyclictest9318-21munin-node1
991999492,0cyclictest19990-1kworker/1:1H23:57:221
991999492,0cyclictest16913-21diskmemload22:17:141
991999492,0cyclictest1470-21runrttasks00:09:481
991999492,0cyclictest0-21swapper/123:42:151
991999492,0cyclictest0-21swapper/121:47:321
991999492,0cyclictest0-21swapper/121:47:321
991999491,0cyclictest13187-21ssh22:08:141
81490,0rcu_preempt3-21ksoftirqd/019:02:240
81490,0rcu_preempt26183-21kworker/0:019:57:230
81490,0rcu_preempt19-21ksoftirqd/120:08:441
81490,0rcu_preempt19-21ksoftirqd/119:57:361
81490,0rcu_preempt19-21ksoftirqd/119:57:001
10050490,0irq/346-484840054-21kswapd023:26:340
10050490,0irq/346-4848400171rcuc/123:36:301
991999482,0cyclictest1553-21ssh21:57:141
991999482,0cyclictest15488-21ssh00:22:241
991999482,0cyclictest0-21swapper/122:29:411
81480,0rcu_preempt14369-21memory20:57:271
10050480,0irq/346-48484000-21swapper/020:53:240
991999472,0cyclictest27054-21apt-get21:17:161
991999472,0cyclictest22352-21switchtime19:42:351
991999472,0cyclictest0-21swapper/122:04:241
991999472,0cyclictest0-21swapper/121:42:151
991999472,0cyclictest0-21swapper/100:33:531
991999472,0cyclictest0-21swapper/100:33:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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