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2026-09-05 - 21:22

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 Sat Sep 05, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811190,0rcu_preempt3-21ksoftirqd/012:29:370
811080,0rcu_preempt19-21ksoftirqd/109:31:131
811010,0rcu_preempt19-21ksoftirqd/110:11:511
81990,0rcu_preempt5665-21ssh11:05:481
81960,0rcu_preempt54-21kswapd009:12:241
81960,0rcu_preempt19-21ksoftirqd/112:01:151
81940,0rcu_preempt19-21ksoftirqd/111:28:161
81940,0rcu_preempt19-21ksoftirqd/109:58:221
81930,0rcu_preempt54-21kswapd010:44:091
81890,0rcu_preempt19-21ksoftirqd/110:47:181
81890,0rcu_preempt0-21swapper/111:12:301
81880,0rcu_preempt19-21ksoftirqd/109:16:231
81860,0rcu_preempt19-21ksoftirqd/107:16:391
293212860,0chrt9950irq/345-484840008:00:390
81820,0rcu_preempt11009-21kworker/1:011:38:581
81810,0rcu_preempt836-21rngd10:24:381
81800,0rcu_preempt0-21swapper/110:31:321
81780,0rcu_preempt54-21kswapd011:04:191
81770,0rcu_preempt54-21kswapd010:58:411
81770,0rcu_preempt0-21swapper/112:29:091
81770,0rcu_preempt0-21swapper/109:44:351
81760,0rcu_preempt0-21swapper/110:05:101
81750,0rcu_preempt54-21kswapd012:20:141
81750,0rcu_preempt3-21ksoftirqd/009:19:360
10050750,0irq/346-484840030809-1kworker/0:3H11:33:500
81740,0rcu_preempt0-21swapper/109:41:311
81740,0rcu_preempt0-21swapper/109:41:311
81740,0rcu_preempt0-21swapper/109:36:391
81730,0rcu_preempt3-21ksoftirqd/009:52:450
81730,0rcu_preempt0-21swapper/110:36:341
81720,0rcu_preempt19-21ksoftirqd/112:33:491
81720,0rcu_preempt19-21ksoftirqd/110:51:581
81700,0rcu_preempt19-21ksoftirqd/112:16:231
81690,0rcu_preempt3-21ksoftirqd/011:51:030
81690,0rcu_preempt3-21ksoftirqd/009:12:520
81690,0rcu_preempt31558-21kworker/1:109:50:051
81690,0rcu_preempt19-21ksoftirqd/111:23:141
81690,0rcu_preempt19-21ksoftirqd/110:03:021
81680,0rcu_preempt3-21ksoftirqd/010:24:300
81680,0rcu_preempt3-21ksoftirqd/010:17:200
81680,0rcu_preempt19-21ksoftirqd/107:41:081
81680,0rcu_preempt19127-21meminfo12:24:460
81670,0rcu_preempt19-21ksoftirqd/111:57:421
81660,0rcu_preempt19-21ksoftirqd/112:38:291
81660,0rcu_preempt19-21ksoftirqd/111:44:431
81660,0rcu_preempt19-21ksoftirqd/107:32:251
81650,0rcu_preempt19-21ksoftirqd/112:11:541
81640,0rcu_preempt19-21ksoftirqd/109:23:471
81640,0rcu_preempt19-21ksoftirqd/107:45:001
81640,0rcu_preempt19-21ksoftirqd/107:20:031
81640,0rcu_preempt11009-21kworker/1:011:17:541
1164299641,0cyclictest14924-21ping07:19:270
81630,0rcu_preempt19-21ksoftirqd/111:51:391
81630,0rcu_preempt19-21ksoftirqd/111:43:251
81620,0rcu_preempt19-21ksoftirqd/111:30:001
81620,0rcu_preempt19-21ksoftirqd/110:21:591
81620,0rcu_preempt19-21ksoftirqd/109:26:001
1164299622,0cyclictest0-21swapper/009:47:030
1164299621,0cyclictest1445-21runrttasks10:24:020
81610,0rcu_preempt3482-21kworker/0:108:24:470
81610,0rcu_preempt27771-21ping08:06:021
81610,0rcu_preempt19-21ksoftirqd/112:08:041
81610,0rcu_preempt19-21ksoftirqd/110:15:341
81610,0rcu_preempt19-21ksoftirqd/108:12:311
81600,0rcu_preempt19-21ksoftirqd/108:19:461
81600,0rcu_preempt19-21ksoftirqd/108:19:461
1164299603,0cyclictest0-21swapper/010:10:360
1164299602,0cyclictest0-21swapper/011:09:380
1164299601,0cyclictest25692-21sh11:59:250
1164299592,0cyclictest0-21swapper/010:47:320
81580,0rcu_preempt3-21ksoftirqd/011:27:260
81580,0rcu_preempt3-21ksoftirqd/009:56:410
1164299581,0cyclictest14924-21ping07:39:390
1164299576,0cyclictest20351-21taskset11:20:310
1164299572,0cyclictest3357-1kworker/0:2H11:37:540
1164299572,0cyclictest0-21swapper/009:18:530
11642995715,0cyclictest1445-21runrttasks12:01:090
1164299571,0cyclictest14924-21ping07:29:380
1164299563,0cyclictest0-21swapper/011:15:130
1164299563,0cyclictest0-21swapper/010:56:110
1164299562,0cyclictest25069-21ssh10:53:210
1164299562,0cyclictest1771-21ssh12:07:290
1164299562,0cyclictest13400-21seq12:19:300
1164299562,0cyclictest13356-1kworker/0:0H11:49:170
1164299562,0cyclictest0-21swapper/011:40:460
1164299562,0cyclictest0-21swapper/009:40:310
1164299562,0cyclictest0-21swapper/009:40:310
11642995615,0cyclictest10546-21munin-node0
1164299561,0cyclictest2893-21runrttasks10:30:240
81550,0rcu_preempt19-21ksoftirqd/108:49:451
81550,0rcu_preempt19-21ksoftirqd/108:34:451
81550,0rcu_preempt19-21ksoftirqd/107:24:431
1164299553,0cyclictest0-21swapper/012:11:370
1164299552,0cyclictest5822-21ssh10:00:540
1164299552,0cyclictest0-21swapper/011:02:200
1164299552,0cyclictest0-21swapper/010:35:180
1164299551,0cyclictest0-21swapper/009:31:050
81540,0rcu_preempt19-21ksoftirqd/108:44:501
81540,0rcu_preempt19-21ksoftirqd/108:24:521
81540,0rcu_preempt19-21ksoftirqd/108:15:131
81540,0rcu_preempt19-21ksoftirqd/108:03:071
1164299548,0cyclictest10814-1kworker/0:0H12:18:300
1164299545,0cyclictest0-21swapper/007:24:060
1164299544,0cyclictest10050irq/346-484840012:36:030
1164299542,0cyclictest8486-1kworker/0:3H08:39:520
1164299542,0cyclictest4060-21munin-node0
1164299542,0cyclictest14924-21ping07:34:370
1164299541,0cyclictest23999-21grep07:45:010
81530,0rcu_preempt19-21ksoftirqd/108:29:481
81530,0rcu_preempt19-21ksoftirqd/107:57:391
1164299533,0cyclictest0-21swapper/010:40:180
1164299532,0cyclictest16907-21df07:24:420
11642995311,0cyclictest0-21swapper/009:36:560
81520,0rcu_preempt15746-21php-cgi08:59:441
81510,0rcu_preempt31457-21munin-node0
81510,0rcu_preempt19-21ksoftirqd/107:49:471
81510,0rcu_preempt19-21ksoftirqd/107:09:431
81510,0rcu_preempt19-21ksoftirqd/107:09:431
1164299513,0cyclictest0-21swapper/009:26:500
1164299512,0cyclictest0-21swapper/008:14:460
1164299512,0cyclictest0-21swapper/007:49:420
10050510,0irq/346-484840028291-1kworker/0:0H10:05:140
1164299502,0cyclictest0-21swapper/008:29:420
1164299501,0cyclictest27771-21ping08:04:420
81490,0rcu_preempt3-21ksoftirqd/008:19:430
81490,0rcu_preempt3-21ksoftirqd/008:19:430
81490,0rcu_preempt19-21ksoftirqd/109:04:451
81480,0rcu_preempt14546-21ps08:54:491
81460,0rcu_preempt3-21ksoftirqd/008:35:100
81460,0rcu_preempt19-21ksoftirqd/107:35:371
81450,0rcu_preempt9099-21df_abs08:39:391
81450,0rcu_preempt3-21ksoftirqd/007:04:480
81410,0rcu_preempt3-21ksoftirqd/008:59:160
81410,0rcu_preempt3-21ksoftirqd/007:56:280
1164299412,0cyclictest0-21swapper/007:09:390
1164299412,0cyclictest0-21swapper/007:09:390
81400,0rcu_preempt3-21ksoftirqd/008:59:550
81400,0rcu_preempt3-21ksoftirqd/008:51:450
81390,0rcu_preempt3-21ksoftirqd/009:04:280
81380,0rcu_preempt19-21ksoftirqd/107:04:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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