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2026-06-29 - 10:10

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 highest latencies:
System rackaslot5s.osadl.org (updated Mon Jun 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811270,0rcu_preempt19-21ksoftirqd/123:11:381
811190,0rcu_preempt19-21ksoftirqd/100:05:521
811180,0rcu_preempt54-21kswapd023:57:481
811150,0rcu_preempt19-21ksoftirqd/122:08:391
811130,0rcu_preempt31764-21kworker/1:021:51:201
811080,0rcu_preempt19-21ksoftirqd/121:58:541
811070,0rcu_preempt19-21ksoftirqd/122:34:271
811060,0rcu_preempt19-21ksoftirqd/122:57:021
811050,0rcu_preempt19-21ksoftirqd/121:27:171
811030,0rcu_preempt0-21swapper/100:34:091
811020,0rcu_preempt19-21ksoftirqd/122:19:131
811010,0rcu_preempt19-21ksoftirqd/100:16:561
81980,0rcu_preempt19-21ksoftirqd/120:32:401
81960,0rcu_preempt19-21ksoftirqd/122:12:211
81960,0rcu_preempt0-21swapper/123:52:091
81950,0rcu_preempt19-21ksoftirqd/123:23:461
81950,0rcu_preempt19-21ksoftirqd/121:33:371
81950,0rcu_preempt0-21swapper/123:32:291
81940,0rcu_preempt19-21ksoftirqd/123:01:231
81940,0rcu_preempt19-21ksoftirqd/120:41:571
81940,0rcu_preempt19-21ksoftirqd/120:41:571
81930,0rcu_preempt54-21kswapd021:16:171
81920,0rcu_preempt54-21kswapd023:40:251
81920,0rcu_preempt19-21ksoftirqd/123:55:311
81920,0rcu_preempt19-21ksoftirqd/123:42:421
81920,0rcu_preempt19-21ksoftirqd/121:55:391
81920,0rcu_preempt19-21ksoftirqd/121:12:101
81920,0rcu_preempt19-21ksoftirqd/119:42:401
81910,0rcu_preempt19-21ksoftirqd/123:27:531
81890,0rcu_preempt19-21ksoftirqd/122:29:321
81880,0rcu_preempt19-21ksoftirqd/123:16:551
81870,0rcu_preempt19-21ksoftirqd/122:51:321
81860,0rcu_preempt19-21ksoftirqd/120:17:331
81860,0rcu_preempt19-21ksoftirqd/100:18:081
81850,0rcu_preempt19-21ksoftirqd/100:29:591
81850,0rcu_preempt19-21ksoftirqd/100:07:471
81810,0rcu_preempt30060-21diskmemload00:22:221
81810,0rcu_preempt19-21ksoftirqd/120:27:421
81800,0rcu_preempt19-21ksoftirqd/122:02:441
81800,0rcu_preempt19-21ksoftirqd/121:27:461
81800,0rcu_preempt19-21ksoftirqd/121:27:461
81790,0rcu_preempt19-21ksoftirqd/120:12:451
81790,0rcu_preempt19-21ksoftirqd/120:01:051
81790,0rcu_preempt19-21ksoftirqd/119:18:281
81780,0rcu_preempt19-21ksoftirqd/122:25:201
81780,0rcu_preempt19-21ksoftirqd/120:52:341
81780,0rcu_preempt19-21ksoftirqd/120:22:351
81770,0rcu_preempt26357-21ping19:40:231
81770,0rcu_preempt19-21ksoftirqd/123:17:191
81770,0rcu_preempt19-21ksoftirqd/120:09:211
81770,0rcu_preempt19-21ksoftirqd/119:31:271
81770,0rcu_preempt19-21ksoftirqd/119:31:271
81760,0rcu_preempt26357-21ping19:25:501
81760,0rcu_preempt19-21ksoftirqd/122:42:431
81760,0rcu_preempt19-21ksoftirqd/122:41:191
81760,0rcu_preempt19-21ksoftirqd/119:34:491
81750,0rcu_preempt19-21ksoftirqd/121:42:181
81730,0rcu_preempt19-21ksoftirqd/120:59:281
81730,0rcu_preempt19-21ksoftirqd/119:47:461
81710,0rcu_preempt19-21ksoftirqd/121:46:041
81710,0rcu_preempt19-21ksoftirqd/121:18:071
81690,0rcu_preempt19-21ksoftirqd/120:02:461
81690,0rcu_preempt0-21swapper/121:02:351
81680,0rcu_preempt19-21ksoftirqd/119:08:431
81670,0rcu_preempt19-21ksoftirqd/123:02:391
81670,0rcu_preempt19-21ksoftirqd/119:52:321
81670,0rcu_preempt19-21ksoftirqd/119:16:151
81650,0rcu_preempt3-21ksoftirqd/021:27:450
81650,0rcu_preempt3-21ksoftirqd/021:27:450
81640,0rcu_preempt3-21ksoftirqd/023:02:250
81640,0rcu_preempt19-21ksoftirqd/120:47:591
10050640,0irq/346-48484000-21swapper/023:07:350
81630,0rcu_preempt3-21ksoftirqd/000:22:180
9950620,0irq/345-48484000-21swapper/021:44:130
9950610,0irq/345-48484000-21swapper/000:10:330
81600,0rcu_preempt19-21ksoftirqd/120:42:431
13250600,0irq/301-480200054-21kswapd023:42:320
81590,0rcu_preempt3-21ksoftirqd/023:57:480
81580,0rcu_preempt3-21ksoftirqd/022:18:230
10050540,0irq/346-484840025734-21ssh22:41:210
81530,0rcu_preempt3-21ksoftirqd/022:07:430
10050510,0irq/346-484840054-21kswapd021:59:160
10050500,0irq/346-484840021526-1kworker/0:0H20:42:340
10050490,0irq/346-484840054-21kswapd022:34:170
10050490,0irq/346-48484001642-1kworker/0:0H22:58:490
10050490,0irq/346-48484000-21swapper/023:53:070
9950470,0irq/345-484840054-21kswapd000:33:400
10050470,0irq/346-48484007147-1kworker/0:1H21:52:010
10050470,0irq/346-48484005495-21munin-run00:32:170
10050470,0irq/346-48484004755-1kworker/0:0H00:02:200
10050470,0irq/346-484840010416-21ssh21:52:400
10050470,0irq/346-48484000-21swapper/022:13:390
10050470,0irq/346-48484000-21swapper/022:04:560
81460,0rcu_preempt3-21ksoftirqd/019:02:360
10050460,0irq/346-4848400851-21rngd21:42:170
10050460,0irq/346-484840054-21kswapd023:50:030
10050460,0irq/346-484840054-21kswapd022:24:140
10050460,0irq/346-484840054-21kswapd021:34:400
9950440,0irq/345-484840054-21kswapd022:45:130
81440,0rcu_preempt3-21ksoftirqd/021:22:380
10050440,0irq/346-484840054-21kswapd022:53:180
2307399421,0cyclictest8288-21ping20:13:530
10050420,0irq/346-4848400851-21rngd23:32:000
10050420,0irq/346-4848400851-21rngd23:18:040
10050420,0irq/346-484840054-21kswapd023:22:410
10050420,0irq/346-484840010019-1kworker/0:1H20:07:410
9950410,0irq/345-484840016972-21munin-node0
9950410,0irq/345-48484000-21swapper/022:28:050
81410,0rcu_preempt19-21ksoftirqd/119:02:351
81410,0rcu_preempt14511-21kworker/0:100:13:180
3862410,0chrt31262-1kworker/0:0H19:36:510
295382415,0sleep00-21swapper/019:26:190
10050410,0irq/346-484840026813-21sshd00:20:420
10050410,0irq/346-48484000-21swapper/022:49:420
9950400,0irq/345-48484000-21swapper/020:02:300
81400,0rcu_preempt54-21kswapd023:15:490
10050400,0irq/346-484840054-21kswapd023:32:250
10050400,0irq/346-484840032523-1kworker/0:1H21:13:150
10050400,0irq/346-48484000-21swapper/021:17:470
150262390,0chrt14956-1kworker/0:2H20:19:400
10050390,0irq/346-484840032757-21ssh21:09:210
10050390,0irq/346-484840016595-1kworker/0:1H20:27:380
9950380,0irq/345-48484007257-21aten_rapower_cu19:57:290
23073993812,0cyclictest0-21swapper/020:22:440
10050380,0irq/346-4848400453-1kworker/0:2H19:38:480
10050380,0irq/346-484840028105-1kworker/0:1H21:02:360
2307399372,0cyclictest26357-21ping19:42:480
10050370,0irq/346-48484000-21swapper/019:18:180
9950360,0irq/345-48484000-21swapper/021:02:180
266162360,0sleep026447-1kworker/0:3H20:55:450
245362360,0sleep024361-1kworker/0:0H19:10:340
2307399362,0cyclictest26357-21ping19:47:390
23073993610,0cyclictest30467-21chrt19:27:480
23073993610,0cyclictest30467-21chrt19:27:480
214312360,0chrt19869-1kworker/0:2H20:37:560
214312360,0chrt19869-1kworker/0:2H20:37:560
10050360,0irq/346-484840025396-21latency19:12:380
10050350,0irq/346-48484000-21swapper/019:57:080
9950330,0irq/345-48484000-21swapper/020:32:380
10050310,0irq/346-48484000-21swapper/020:48:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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