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2026-06-12 - 05:59

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 Fri Jun 12, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt19-21ksoftirqd/100:02:591
81910,0rcu_preempt19-21ksoftirqd/121:55:421
81870,0rcu_preempt19-21ksoftirqd/100:13:331
9950840,0irq/345-484840041ktimersoftd/022:31:160
9950820,0irq/345-484840041ktimersoftd/023:57:230
9950810,0irq/345-4848400111rcuc/022:20:450
10050810,0irq/346-4848400111rcuc/023:27:500
81800,0rcu_preempt19-21ksoftirqd/120:17:341
9950790,0irq/345-4848400111rcuc/022:00:540
81790,0rcu_preempt0-21swapper/123:17:451
81790,0rcu_preempt0-21swapper/123:17:451
10050790,0irq/346-4848400111rcuc/000:19:480
81770,0rcu_preempt851-21rngd22:20:081
298799777,0cyclictest30641-1kworker/0:1H23:42:590
9950760,0irq/345-4848400111rcuc/022:08:050
81760,0rcu_preempt3-21ksoftirqd/022:27:260
10050760,0irq/346-484840041ktimersoftd/023:14:110
10050760,0irq/346-4848400111rcuc/000:10:270
298799758,0cyclictest17152-21ssh21:47:460
10050750,0irq/346-4848400111rcuc/022:38:470
9950740,0irq/345-484840041ktimersoftd/021:17:590
10050740,0irq/346-4848400111rcuc/023:05:190
10050740,0irq/346-4848400111rcuc/022:13:530
10050740,0irq/346-4848400111rcuc/022:04:460
9950730,0irq/345-4848400111rcuc/021:15:550
9950720,0irq/345-484840041ktimersoftd/022:54:470
9950720,0irq/345-4848400111rcuc/022:43:050
298799721,0cyclictest13323-21taskset22:49:030
9950710,0irq/345-4848400111rcuc/021:33:310
81710,0rcu_preempt3-21ksoftirqd/023:10:350
298799711,0cyclictest30641-1kworker/0:1H23:41:290
10050710,0irq/346-484840041ktimersoftd/021:10:060
81700,0rcu_preempt3-21ksoftirqd/023:35:150
81700,0rcu_preempt3-21ksoftirqd/021:43:570
81700,0rcu_preempt3-21ksoftirqd/021:43:570
81690,0rcu_preempt26369-1kworker/1:1H22:42:351
9950680,0irq/345-484840041ktimersoftd/022:35:280
81680,0rcu_preempt19-21ksoftirqd/120:33:271
298799682,0cyclictest0-21swapper/023:25:090
81670,0rcu_preempt19-21ksoftirqd/121:50:011
298799671,0cyclictest32026-1kworker/0:0H21:30:040
298799671,0cyclictest15186-1kworker/0:0H00:32:060
298799662,0cyclictest5926-1kworker/0:1H23:19:330
298799662,0cyclictest5926-1kworker/0:1H23:19:330
298799662,0cyclictest20478-21ssh00:02:460
298799652,0cyclictest0-21swapper/022:59:060
298799642,0cyclictest0-21swapper/019:52:450
298799632,0cyclictest10399-21open_inodes19:28:040
298799632,0cyclictest0-21swapper/019:42:520
298799627,0cyclictest27145-21ssh21:24:190
298799622,0cyclictest22752-21ssh21:52:560
298799622,0cyclictest21452-21runrttasks20:02:540
81610,0rcu_preempt3548-21apt-get20:47:440
298799615,0cyclictest0-21swapper/019:32:500
298799611,0cyclictest7418-21ssh21:37:480
10050610,0irq/346-484840041ktimersoftd/000:33:410
298799602,0cyclictest20130-21taskset19:57:580
298799602,0cyclictest11220-21ssh00:25:580
81590,0rcu_preempt19-21ksoftirqd/121:39:211
81590,0rcu_preempt19-21ksoftirqd/121:07:501
298799594,0cyclictest0-21swapper/019:23:090
298799592,0cyclictest0-21swapper/023:59:070
2987995912,0cyclictest29379-21munin-node0
298799591,0cyclictest8112-1kworker/0:1H23:52:340
298799581,0cyclictest0-21swapper/019:14:340
81570,0rcu_preempt19-21ksoftirqd/122:33:531
298799573,0cyclictest0-21swapper/000:16:020
298799571,0cyclictest31047-21wget20:32:460
81550,0rcu_preempt19-21ksoftirqd/123:02:591
81550,0rcu_preempt19164-21ping20:18:050
298799555,0cyclictest0-21swapper/019:38:540
298799552,0cyclictest0-21swapper/021:07:340
298799552,0cyclictest0-21swapper/019:22:050
81540,0rcu_preempt3-21ksoftirqd/020:42:580
81540,0rcu_preempt19-21ksoftirqd/123:41:031
81540,0rcu_preempt19-21ksoftirqd/123:23:301
81540,0rcu_preempt19164-21ping20:22:470
2987995414,0cyclictest7676-21runrttasks20:57:590
298799541,0cyclictest0-21swapper/020:07:470
81530,0rcu_preempt9973-21diskmemload21:12:501
81530,0rcu_preempt19-21ksoftirqd/122:48:101
81530,0rcu_preempt19-21ksoftirqd/122:43:131
81530,0rcu_preempt19-21ksoftirqd/120:22:351
81520,0rcu_preempt19-21ksoftirqd/122:57:571
2987995212,0cyclictest0-21swapper/019:47:570
298799512,0cyclictest0-21swapper/020:13:050
81500,0rcu_preempt9973-21diskmemload22:27:551
81500,0rcu_preempt3-21ksoftirqd/020:52:440
81500,0rcu_preempt19-21ksoftirqd/100:32:031
81490,0rcu_preempt19-21ksoftirqd/123:55:221
81490,0rcu_preempt18809-21kworker/1:123:27:451
298899497,0cyclictest965-1kworker/1:2H23:13:231
298799499,0cyclictest3196-21aten_rapower_en19:07:460
81480,0rcu_preempt3-21ksoftirqd/019:02:560
81480,0rcu_preempt19-21ksoftirqd/123:32:451
81480,0rcu_preempt19-21ksoftirqd/122:25:081
298899481,0cyclictest18976-21ssh22:55:001
81470,0rcu_preempt20059-21apt-get21:17:461
81470,0rcu_preempt19-21ksoftirqd/119:22:561
81470,0rcu_preempt19-21ksoftirqd/119:17:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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