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2026-06-23 - 19:21

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 Tue Jun 23, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811240,0rcu_preempt3-21ksoftirqd/008:57:350
811210,0rcu_preempt19-21ksoftirqd/112:27:331
811010,0rcu_preempt54-21kswapd009:41:441
81950,0rcu_preempt19-21ksoftirqd/111:22:251
81880,0rcu_preempt54-21kswapd012:06:191
81880,0rcu_preempt19-21ksoftirqd/109:52:511
81870,0rcu_preempt19-21ksoftirqd/110:28:281
81870,0rcu_preempt19-21ksoftirqd/110:18:201
81840,0rcu_preempt19-21ksoftirqd/112:16:071
81820,0rcu_preempt19-21ksoftirqd/112:01:371
81820,0rcu_preempt0-21swapper/110:12:111
81810,0rcu_preempt19-21ksoftirqd/108:12:241
81800,0rcu_preempt19-21ksoftirqd/109:43:551
81800,0rcu_preempt16323-21kworker/1:212:36:541
81780,0rcu_preempt54-21kswapd009:15:151
81780,0rcu_preempt19-21ksoftirqd/112:23:271
81780,0rcu_preempt19-21ksoftirqd/107:28:321
81780,0rcu_preempt16323-21kworker/1:211:36:191
81760,0rcu_preempt0-21swapper/112:22:031
81760,0rcu_preempt0-21swapper/110:43:361
81730,0rcu_preempt19-21ksoftirqd/111:39:331
81720,0rcu_preempt2578-21ping07:32:411
81720,0rcu_preempt20102-21ssh10:59:101
81720,0rcu_preempt0-21swapper/109:35:331
81710,0rcu_preempt19-21ksoftirqd/108:03:071
81710,0rcu_preempt0-21swapper/109:08:431
81700,0rcu_preempt19-21ksoftirqd/107:39:341
81700,0rcu_preempt0-21swapper/110:13:591
81690,0rcu_preempt19-21ksoftirqd/111:05:121
81690,0rcu_preempt0-21swapper/110:53:401
81680,0rcu_preempt19-21ksoftirqd/111:09:501
81680,0rcu_preempt19-21ksoftirqd/109:25:521
81680,0rcu_preempt0-21swapper/111:22:101
81680,0rcu_preempt0-21swapper/110:42:211
81660,0rcu_preempt10821-1kworker/1:0H09:47:501
81660,0rcu_preempt0-21swapper/111:16:031
81650,0rcu_preempt26817-21kworker/0:111:15:110
81650,0rcu_preempt19-21ksoftirqd/112:08:341
81650,0rcu_preempt19-21ksoftirqd/107:42:481
81640,0rcu_preempt19-21ksoftirqd/109:29:241
3170599622,0cyclictest17245-21ssh12:02:360
81610,0rcu_preempt19-21ksoftirqd/110:50:021
3170599617,0cyclictest12016-1kworker/0:2H12:32:010
3170599612,0cyclictest3198-21ntpq11:47:470
81600,0rcu_preempt19-21ksoftirqd/111:57:061
81600,0rcu_preempt19-21ksoftirqd/108:54:121
3170599608,0cyclictest3-21ksoftirqd/011:59:400
31705996017,0cyclictest25013-21runrttasks10:32:010
3170599596,0cyclictest13013-1kworker/0:3H10:32:500
3170599592,0cyclictest0-21swapper/009:12:520
31705995916,0cyclictest15704-21ssh10:22:350
81580,0rcu_preempt19-21ksoftirqd/111:31:501
81580,0rcu_preempt19-21ksoftirqd/110:35:101
3170599588,0cyclictest3-21ksoftirqd/010:39:430
3170599583,0cyclictest0-21swapper/012:15:380
3170599582,0cyclictest3894-21ssh09:37:370
3170599581,0cyclictest29199-21ssh09:30:090
3170599581,0cyclictest25829-21munin-node0
3170599574,0cyclictest0-21swapper/008:16:480
3170599573,0cyclictest0-21swapper/011:08:260
3170599571,0cyclictest2372-21chrt09:36:020
81560,0rcu_preempt19-21ksoftirqd/110:02:361
81560,0rcu_preempt19-21ksoftirqd/109:58:531
81560,0rcu_preempt19-21ksoftirqd/109:20:561
81560,0rcu_preempt19-21ksoftirqd/107:52:401
3170599567,0cyclictest54-21kswapd011:26:290
3170599565,0cyclictest0-21swapper/009:50:090
3170599563,0cyclictest0-21swapper/009:23:450
3170599562,0cyclictest268092chrt11:06:300
3170599562,0cyclictest2578-21ping07:37:340
3170599562,0cyclictest2578-21ping07:27:350
3170599562,0cyclictest25404-21rm09:58:530
3170599562,0cyclictest12877-21runrttasks09:46:530
3170599562,0cyclictest10751-21php-cgi09:11:480
3170599562,0cyclictest0-21swapper/010:47:430
3170599562,0cyclictest0-21swapper/008:37:340
3170599562,0cyclictest0-21swapper/008:02:530
3170599562,0cyclictest0-21swapper/007:17:390
31705995610,0cyclictest31554-1kworker/0:2H11:45:480
3170599559,0cyclictest0-21swapper/009:52:340
3170599553,0cyclictest0-21swapper/010:55:010
3170599552,0cyclictest2578-21ping07:42:360
3170599552,0cyclictest1249-21rm12:18:250
3170599552,0cyclictest0-21swapper/012:08:320
3170599552,0cyclictest0-21swapper/008:47:370
3170599551,0cyclictest6362-21grep11:17:500
3170599551,0cyclictest2578-21ping07:22:360
81540,0rcu_preempt15417-21ping08:17:531
3170599543,0cyclictest12774-21dropbear07:47:390
3170599543,0cyclictest12774-21dropbear07:47:390
3170599542,0cyclictest2578-21ping07:32:340
3170599542,0cyclictest0-21swapper/011:34:510
3170599542,0cyclictest0-21swapper/011:01:060
3170599542,0cyclictest0-21swapper/010:43:130
3170599542,0cyclictest0-21swapper/010:20:360
3170599542,0cyclictest0-21swapper/010:16:170
3170599541,0cyclictest25634-1kworker/0:1H10:06:270
81530,0rcu_preempt19-21ksoftirqd/111:42:361
3170599533,0cyclictest0-21swapper/012:32:340
3170599533,0cyclictest0-21swapper/008:07:560
3170599532,0cyclictest0-21swapper/012:27:160
81520,0rcu_preempt29823-21kworker/0:210:07:450
81520,0rcu_preempt19-21ksoftirqd/108:57:391
81520,0rcu_preempt19-21ksoftirqd/108:47:441
81520,0rcu_preempt19-21ksoftirqd/108:22:301
81520,0rcu_preempt19-21ksoftirqd/108:07:391
81520,0rcu_preempt19-21ksoftirqd/108:01:081
81520,0rcu_preempt19-21ksoftirqd/107:12:451
81520,0rcu_preempt19-21ksoftirqd/107:07:391
3170599522,0cyclictest0-21swapper/011:27:390
3170599521,0cyclictest2578-21ping07:17:240
3170599521,0cyclictest10050irq/346-484840011:55:050
3170599521,0cyclictest0-21swapper/009:17:260
81510,0rcu_preempt16323-21kworker/1:211:47:501
81510,0rcu_preempt16323-21kworker/1:210:25:011
81500,0rcu_preempt19-21ksoftirqd/108:37:401
81500,0rcu_preempt19-21ksoftirqd/107:47:461
81500,0rcu_preempt19-21ksoftirqd/107:47:461
81480,0rcu_preempt19-21ksoftirqd/109:02:361
81480,0rcu_preempt19-21ksoftirqd/108:42:491
81470,0rcu_preempt0-21swapper/007:11:340
81460,0rcu_preempt2578-21ping07:17:421
81460,0rcu_preempt24647-21meminfo08:22:480
81460,0rcu_preempt19-21ksoftirqd/108:32:131
81460,0rcu_preempt19-21ksoftirqd/107:22:541
3170599462,0cyclictest0-21swapper/008:32:410
81450,0rcu_preempt3-21ksoftirqd/008:44:070
81450,0rcu_preempt19-21ksoftirqd/108:35:161
81440,0rcu_preempt3-21ksoftirqd/009:06:340
81430,0rcu_preempt3-21ksoftirqd/008:28:520
9950420,0irq/345-484840031688-21latency_hist07:07:230
81410,0rcu_preempt19-21ksoftirqd/107:02:361
81400,0rcu_preempt15417-21ping08:17:500
81390,0rcu_preempt3-21ksoftirqd/007:52:550
81390,0rcu_preempt31799-1kworker/0:2H08:53:380
81350,0rcu_preempt3-21ksoftirqd/007:57:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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