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2026-06-15 - 06:17

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 Mon Jun 15, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811050,0rcu_preempt19-21ksoftirqd/120:28:311
81970,0rcu_preempt19-21ksoftirqd/123:43:431
81940,0rcu_preempt19-21ksoftirqd/122:02:041
81940,0rcu_preempt0-21swapper/122:53:051
81890,0rcu_preempt54-21kswapd023:37:111
81890,0rcu_preempt54-21kswapd022:25:491
81880,0rcu_preempt19-21ksoftirqd/100:14:431
81870,0rcu_preempt31559-21munin-node1
81860,0rcu_preempt19-21ksoftirqd/123:55:531
81860,0rcu_preempt19-21ksoftirqd/122:36:031
81850,0rcu_preempt19-21ksoftirqd/123:12:461
81840,0rcu_preempt54-21kswapd021:28:541
81830,0rcu_preempt19-21ksoftirqd/122:58:371
81830,0rcu_preempt19-21ksoftirqd/100:31:201
81820,0rcu_preempt54-21kswapd022:52:071
81820,0rcu_preempt19-21ksoftirqd/121:54:151
81820,0rcu_preempt19-21ksoftirqd/100:25:361
81820,0rcu_preempt19-21ksoftirqd/100:25:361
81810,0rcu_preempt851-21rngd23:51:101
81810,0rcu_preempt851-21rngd23:51:101
81800,0rcu_preempt19-21ksoftirqd/123:24:011
81800,0rcu_preempt19-21ksoftirqd/100:36:121
81790,0rcu_preempt19-21ksoftirqd/119:56:571
81770,0rcu_preempt19-21ksoftirqd/121:47:361
81760,0rcu_preempt19-21ksoftirqd/100:05:251
81740,0rcu_preempt25108-21ssh21:21:591
81740,0rcu_preempt22700-21ssh23:31:321
81740,0rcu_preempt22700-21ssh23:31:321
81740,0rcu_preempt19-21ksoftirqd/120:12:541
81740,0rcu_preempt19-21ksoftirqd/100:11:071
81730,0rcu_preempt19-21ksoftirqd/119:28:051
81720,0rcu_preempt19-21ksoftirqd/120:10:551
10050720,0irq/346-484840032687-1kworker/0:1H00:18:010
81710,0rcu_preempt20099-21ping20:18:011
81710,0rcu_preempt13186-21ssh22:15:411
81700,0rcu_preempt19-21ksoftirqd/121:12:551
81690,0rcu_preempt54-21kswapd022:03:521
81680,0rcu_preempt3-21ksoftirqd/022:17:380
10050680,0irq/346-48484005696-1kworker/0:0H21:44:020
81670,0rcu_preempt19-21ksoftirqd/121:08:431
81660,0rcu_preempt19-21ksoftirqd/123:18:491
81660,0rcu_preempt19-21ksoftirqd/122:39:011
81650,0rcu_preempt3-21ksoftirqd/022:00:040
81650,0rcu_preempt0-21swapper/100:21:331
81640,0rcu_preempt54-21kswapd021:42:411
81640,0rcu_preempt3-21ksoftirqd/022:59:200
81640,0rcu_preempt19-21ksoftirqd/123:58:551
81630,0rcu_preempt3-21ksoftirqd/000:23:020
81630,0rcu_preempt3-21ksoftirqd/000:23:020
81630,0rcu_preempt19-21ksoftirqd/123:05:221
81630,0rcu_preempt19-21ksoftirqd/122:43:401
81630,0rcu_preempt19-21ksoftirqd/121:36:201
81630,0rcu_preempt19-21ksoftirqd/121:26:061
81630,0rcu_preempt0-21swapper/121:41:541
9950620,0irq/345-48484000-21swapper/023:09:240
81620,0rcu_preempt3-21ksoftirqd/022:23:060
81620,0rcu_preempt19-21ksoftirqd/122:11:041
81620,0rcu_preempt1183-21apt-get20:37:431
81600,0rcu_preempt54-21kswapd023:59:540
81600,0rcu_preempt19-21ksoftirqd/123:39:231
81590,0rcu_preempt3-21ksoftirqd/000:13:490
81590,0rcu_preempt19-21ksoftirqd/121:02:431
81590,0rcu_preempt19-21ksoftirqd/119:07:431
81580,0rcu_preempt3898-21cyclictest19:57:430
81580,0rcu_preempt3-21ksoftirqd/020:12:480
81580,0rcu_preempt19-21ksoftirqd/119:58:291
81580,0rcu_preempt17173-21apt-get19:47:421
81570,0rcu_preempt851-21rngd21:15:220
81570,0rcu_preempt19-21ksoftirqd/122:30:481
81570,0rcu_preempt19-21ksoftirqd/122:19:391
81570,0rcu_preempt19-21ksoftirqd/120:26:341
81560,0rcu_preempt19-21ksoftirqd/120:04:101
81550,0rcu_preempt19-21ksoftirqd/120:47:511
81540,0rcu_preempt19-21ksoftirqd/120:32:481
81540,0rcu_preempt17674-21kworker/0:300:32:420
81530,0rcu_preempt3-21ksoftirqd/020:07:520
81530,0rcu_preempt19-21ksoftirqd/120:52:571
81530,0rcu_preempt19-21ksoftirqd/119:32:501
81520,0rcu_preempt19-21ksoftirqd/120:57:501
81510,0rcu_preempt19-21ksoftirqd/119:12:561
10050510,0irq/346-484840022345-1kworker/0:0H22:28:010
81500,0rcu_preempt3-21ksoftirqd/021:02:480
10250500,0irq/333-mmc00-21swapper/000:07:460
9950490,0irq/345-484840015383-21munin-run19:42:310
81490,0rcu_preempt3-21ksoftirqd/020:37:320
81490,0rcu_preempt10896-21diskmemload22:33:000
10050490,0irq/346-484840010572-1kworker/0:2H21:40:570
81480,0rcu_preempt19-21ksoftirqd/119:42:581
10050480,0irq/346-484840054-21kswapd022:13:040
10050480,0irq/346-484840028618-1kworker/0:1H23:03:580
10050480,0irq/346-48484000-21swapper/021:22:500
81470,0rcu_preempt3-21ksoftirqd/022:07:510
81470,0rcu_preempt3-21ksoftirqd/020:17:540
81470,0rcu_preempt19-21ksoftirqd/119:17:541
10050470,0irq/346-484840054-21kswapd021:08:170
81460,0rcu_preempt3-21ksoftirqd/023:38:050
3900994629,0cyclictest9560-21meminfo19:22:571
10050460,0irq/346-4848400851-21rngd21:52:430
10050460,0irq/346-48484006047-1kworker/0:1H23:17:310
10050460,0irq/346-484840032138-1kworker/0:0H22:39:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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