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2026-04-24 - 17:34

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Fri Apr 24, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811540,0rcu_preempt19-21ksoftirqd/107:43:381
811340,0rcu_preempt19-21ksoftirqd/107:18:371
811310,0rcu_preempt3-21ksoftirqd/008:18:220
811200,0rcu_preempt851-21rngd07:58:331
811170,0rcu_preempt3-21ksoftirqd/012:16:180
811140,0rcu_preempt19-21ksoftirqd/110:37:081
811140,0rcu_preempt19-21ksoftirqd/107:33:401
811110,0rcu_preempt3-21ksoftirqd/010:29:520
811090,0rcu_preempt3-21ksoftirqd/011:24:330
811060,0rcu_preempt19-21ksoftirqd/112:23:481
811050,0rcu_preempt3024-21kworker/1:212:13:471
811040,0rcu_preempt25936-21ping08:13:431
811010,0rcu_preempt3-21ksoftirqd/009:33:490
811000,0rcu_preempt19-21ksoftirqd/109:43:371
81970,0rcu_preempt3-21ksoftirqd/009:42:110
81960,0rcu_preempt19-21ksoftirqd/110:30:381
81910,0rcu_preempt19-21ksoftirqd/111:43:461
81910,0rcu_preempt19-21ksoftirqd/111:43:461
81890,0rcu_preempt19-21ksoftirqd/110:18:501
81880,0rcu_preempt3-21ksoftirqd/010:10:400
81880,0rcu_preempt19-21ksoftirqd/107:38:411
81860,0rcu_preempt19-21ksoftirqd/111:23:471
81840,0rcu_preempt19-21ksoftirqd/109:08:491
81820,0rcu_preempt19-21ksoftirqd/109:58:461
81810,0rcu_preempt19-21ksoftirqd/111:38:491
81810,0rcu_preempt19-21ksoftirqd/109:48:321
81800,0rcu_preempt19-21ksoftirqd/109:53:471
81790,0rcu_preempt3-21ksoftirqd/010:33:300
81790,0rcu_preempt19-21ksoftirqd/111:53:401
81790,0rcu_preempt19-21ksoftirqd/111:18:221
81790,0rcu_preempt19-21ksoftirqd/111:08:391
81780,0rcu_preempt19-21ksoftirqd/112:28:441
81770,0rcu_preempt19-21ksoftirqd/112:36:301
81750,0rcu_preempt19-21ksoftirqd/110:09:231
81740,0rcu_preempt54-21kswapd009:28:371
81730,0rcu_preempt19-21ksoftirqd/111:03:471
81730,0rcu_preempt19-21ksoftirqd/110:46:191
81730,0rcu_preempt19-21ksoftirqd/109:18:461
81720,0rcu_preempt19-21ksoftirqd/108:08:381
81710,0rcu_preempt19-21ksoftirqd/112:19:301
81710,0rcu_preempt19-21ksoftirqd/111:58:441
81710,0rcu_preempt19-21ksoftirqd/107:31:471
81700,0rcu_preempt19-21ksoftirqd/112:08:351
81700,0rcu_preempt19-21ksoftirqd/107:23:491
81690,0rcu_preempt0-21swapper/110:07:321
81680,0rcu_preempt3-21ksoftirqd/010:48:400
81680,0rcu_preempt3-21ksoftirqd/010:48:400
81680,0rcu_preempt19-21ksoftirqd/110:52:371
81680,0rcu_preempt19-21ksoftirqd/110:52:371
81680,0rcu_preempt19-21ksoftirqd/108:23:511
81680,0rcu_preempt19-21ksoftirqd/108:23:511
81670,0rcu_preempt19-21ksoftirqd/112:03:361
9881996623,0cyclictest4230-1kworker/0:0H09:33:020
81660,0rcu_preempt19-21ksoftirqd/111:34:471
9881996523,0cyclictest15264-1kworker/0:1H12:28:200
81650,0rcu_preempt3-21ksoftirqd/011:20:420
81650,0rcu_preempt19-21ksoftirqd/111:14:571
81650,0rcu_preempt19-21ksoftirqd/110:59:401
81650,0rcu_preempt19-21ksoftirqd/109:33:431
81640,0rcu_preempt19-21ksoftirqd/110:38:341
81640,0rcu_preempt19-21ksoftirqd/109:17:111
81640,0rcu_preempt19-21ksoftirqd/108:53:431
9881996322,0cyclictest25928-1kworker/0:0H09:50:270
81630,0rcu_preempt19-21ksoftirqd/111:48:491
81630,0rcu_preempt19-21ksoftirqd/110:13:431
81630,0rcu_preempt19-21ksoftirqd/109:41:341
81630,0rcu_preempt0-21swapper/109:03:481
9881996222,0cyclictest31216-1kworker/0:2H12:08:550
9881996217,0cyclictest6527-1kworker/0:2H10:45:110
81620,0rcu_preempt19-21ksoftirqd/108:28:321
10050620,0irq/346-484840020605-1kworker/0:2H12:30:020
9881996125,0cyclictest29011-21ssh10:25:260
9881996123,0cyclictest26391-1kworker/0:2H10:56:010
9881996122,0cyclictest9896-1kworker/0:0H12:37:450
81610,0rcu_preempt19-21ksoftirqd/109:25:521
9881996028,0cyclictest3792-21munin-node0
9881996025,0cyclictest3429-21ssh11:04:530
81600,0rcu_preempt19-21ksoftirqd/110:55:061
81600,0rcu_preempt19-21ksoftirqd/110:27:581
81600,0rcu_preempt10439-21apt-get08:48:291
9881995925,0cyclictest1752-21ssh09:25:030
9881995922,0cyclictest1088-1kworker/0:0H11:09:110
9881995917,0cyclictest13660-1kworker/0:1H11:03:170
81590,0rcu_preempt19-21ksoftirqd/107:48:321
81590,0rcu_preempt1088-1kworker/0:0H11:13:350
9881995824,0cyclictest12884-21ssh12:19:420
81580,0rcu_preempt5506-21apt-get08:33:311
81580,0rcu_preempt19-21ksoftirqd/111:32:451
81580,0rcu_preempt19-21ksoftirqd/108:19:461
9881995729,0cyclictest23560-21apt-get11:58:310
9881995724,0cyclictest21728-21ssh11:56:170
9881995720,0cyclictest10050irq/346-484840010:39:220
9881995623,0cyclictest19094-1kworker/0:2H09:15:560
9881995622,0cyclictest20522-1kworker/0:3H12:03:280
10050560,0irq/346-484840025928-1kworker/0:0H09:54:460
9881995524,0cyclictest14158-21if_eth011:48:410
9881995522,0cyclictest27878-21ssh09:18:450
9881995519,0cyclictest0-21swapper/010:15:580
81550,0rcu_preempt3-21ksoftirqd/009:59:130
81550,0rcu_preempt3-21ksoftirqd/008:58:440
9881995427,0cyclictest10588-1kworker/0:1H11:45:470
9881995427,0cyclictest10588-1kworker/0:1H11:45:470
9881995421,0cyclictest0-21swapper/011:28:550
81540,0rcu_preempt3-21ksoftirqd/008:23:460
81540,0rcu_preempt3-21ksoftirqd/008:23:460
9881995327,0cyclictest13167-21ping07:28:330
9881995325,0cyclictest32102-21ssh11:33:470
9881995324,0cyclictest1350-21lldpd07:12:480
9881995318,0cyclictest24097-21chrt10:20:290
9881995318,0cyclictest13335-21apt-get07:18:320
9881995228,0cyclictest13167-21ping07:33:330
9881995223,0cyclictest25936-21ping08:03:380
9881995221,0cyclictest24038-1kworker/0:1H09:46:060
81520,0rcu_preempt3-21ksoftirqd/007:51:210
81520,0rcu_preempt19-21ksoftirqd/108:58:431
9881995123,0cyclictest15385-21munin-node0
9881995123,0cyclictest13594-21sendmail-msp08:58:210
9881995122,0cyclictest54-21kswapd010:06:130
9881995034,0cyclictest0-21swapper/007:53:320
9881995028,0cyclictest19886-21apt-get07:38:350
9881995025,0cyclictest13167-21ping07:23:390
9881995023,0cyclictest12413-21sshd07:13:470
9881995021,0cyclictest0-21swapper/008:48:290
81500,0rcu_preempt25936-21ping08:13:500
9881994921,0cyclictest10050irq/346-484840009:11:230
9881994918,0cyclictest27927-21idleruntime-cro08:03:210
81490,0rcu_preempt19-21ksoftirqd/107:58:151
9881994833,0cyclictest0-21swapper/008:08:320
9881994829,0cyclictest13167-21ping07:43:330
81480,0rcu_preempt19-21ksoftirqd/107:08:451
9881994722,0cyclictest7263-21aten_rapower_vo08:38:340
81470,0rcu_preempt25936-21ping08:03:441
9881994630,0cyclictest0-21swapper/008:33:320
97792450,0sleep07892-1kworker/0:0H07:07:360
81450,0rcu_preempt19-21ksoftirqd/108:38:381
9881994430,0cyclictest8974-21dropbear08:43:350
9881994430,0cyclictest4062-21ssh08:28:340
81430,0rcu_preempt19-21ksoftirqd/107:15:041
13250430,0irq/301-48020000-21swapper/107:03:371
81400,0rcu_preempt19-21ksoftirqd/108:44:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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