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2026-04-16 - 04:26

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 Thu Apr 16, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811080,0rcu_preempt19-21ksoftirqd/122:08:491
811010,0rcu_preempt54-21kswapd000:23:481
81840,0rcu_preempt5945-21latency_hist23:08:301
81810,0rcu_preempt54-21kswapd021:18:011
81780,0rcu_preempt19-21ksoftirqd/121:53:521
81760,0rcu_preempt0-21swapper/121:47:431
1089199752,0cyclictest17033-21apt-get22:13:410
81740,0rcu_preempt3-21ksoftirqd/000:15:100
81740,0rcu_preempt0-21swapper/123:47:441
15992740,0chrt10050irq/346-484840020:18:310
81730,0rcu_preempt4205-21ssh23:06:091
81720,0rcu_preempt3-21ksoftirqd/021:26:260
81720,0rcu_preempt19-21ksoftirqd/122:32:521
1089199727,0cyclictest17684-1kworker/0:0H00:28:510
1089199721,0cyclictest10378-21awk22:38:570
271632700,0chrt10050irq/346-484840019:57:100
271632700,0chrt10050irq/346-484840019:57:100
1089199702,0cyclictest31792-21ssh22:28:410
1089199695,0cyclictest0-21swapper/021:28:410
81680,0rcu_preempt54-21kswapd022:36:180
1089199686,0cyclictest32198-1kworker/0:2H21:58:500
1089199685,0cyclictest0-21swapper/023:27:080
1089199685,0cyclictest0-21swapper/023:27:080
1089199681,0cyclictest16707-21runrttasks00:24:340
1089199681,0cyclictest0-21swapper/021:47:030
81660,0rcu_preempt21988-21ssh22:51:150
81660,0rcu_preempt19-21ksoftirqd/123:19:061
81660,0rcu_preempt19-21ksoftirqd/100:17:171
1089199662,0cyclictest8074-21taskset23:09:500
1089199662,0cyclictest3328-21ssh00:11:190
1089199662,0cyclictest0-21swapper/022:20:260
1089199661,0cyclictest0-21swapper/021:16:430
81650,0rcu_preempt851-21rngd22:56:461
81650,0rcu_preempt2895-21kworker/0:021:55:130
81650,0rcu_preempt17885-21diskmemload23:18:500
1089199652,0cyclictest29178-21ssh23:31:440
1089199651,0cyclictest26376-1kworker/0:0H22:58:160
1089199651,0cyclictest15401-21ssh21:38:440
81640,0rcu_preempt19-21ksoftirqd/122:38:331
81640,0rcu_preempt19-21ksoftirqd/121:51:321
1089199647,0cyclictest14741-21ssh00:23:290
1089199647,0cyclictest1470-21runrttasks21:35:460
1089199642,0cyclictest21948-21ssh23:57:380
1089199636,0cyclictest17586-1kworker/0:1H21:08:310
1089199633,0cyclictest0-21swapper/000:03:390
1089199632,0cyclictest4637-21taskset23:39:070
81620,0rcu_preempt19-21ksoftirqd/100:18:411
81620,0rcu_preempt19-21ksoftirqd/100:11:521
1089199623,0cyclictest0-21swapper/023:04:170
1089199622,0cyclictest15069-21gzip22:43:560
1089199621,0cyclictest0-21swapper/023:37:590
1089199612,0cyclictest31960-21ssh21:22:400
1089199611,0cyclictest25992-21ssh00:01:260
1089199611,0cyclictest15795-21ssh23:18:290
1089199611,0cyclictest11149-21ssh23:46:170
1089199602,0cyclictest0-21swapper/022:58:470
1089199601,0cyclictest0-21swapper/022:07:460
81590,0rcu_preempt29949-21timerandwakeup20:04:000
81590,0rcu_preempt19-21ksoftirqd/122:27:391
1089199594,0cyclictest16657-21taskset21:03:470
1089199592,0cyclictest28758-21seq22:24:500
1089199591,0cyclictest8183-21apt-get20:38:400
1089199591,0cyclictest24805-21apt-get00:33:410
81580,0rcu_preempt54-21kswapd022:46:561
81580,0rcu_preempt19-21ksoftirqd/122:52:211
1089199581,0cyclictest25364-21seq21:48:460
81570,0rcu_preempt19-21ksoftirqd/123:32:261
1089199572,0cyclictest13238-21ls19:13:490
1089199572,0cyclictest0-21swapper/020:33:460
1089199572,0cyclictest0-21swapper/020:28:460
1089199571,0cyclictest32546-21sh20:13:440
1089199571,0cyclictest15341-21runrttasks22:11:360
1089199571,0cyclictest12946-21munin-plugin-st20:53:290
81560,0rcu_preempt19-21ksoftirqd/121:19:161
1089199569,0cyclictest0-21swapper/023:48:400
1089199562,0cyclictest14173-21ping19:28:450
1089199562,0cyclictest0-21swapper/019:39:040
81550,0rcu_preempt27073-21ping19:58:460
81550,0rcu_preempt25524-1kworker/1:2H00:03:291
1089199552,0cyclictest0-21swapper/019:48:510
1089199552,0cyclictest0-21swapper/019:23:530
81540,0rcu_preempt19-21ksoftirqd/123:48:401
81540,0rcu_preempt19-21ksoftirqd/100:07:251
1089199545,0cyclictest0-21swapper/019:44:070
1089199542,0cyclictest0-21swapper/020:43:470
1089199531,0cyclictest0-21swapper/020:53:500
81520,0rcu_preempt19-21ksoftirqd/122:58:371
1089199522,0cyclictest3460-21ssh20:23:450
1089199522,0cyclictest10867-1kworker/0:0H19:08:420
1089199522,0cyclictest0-21swapper/020:08:540
1089199521,0cyclictest14173-21ping19:33:410
81510,0rcu_preempt19-21ksoftirqd/123:27:541
81510,0rcu_preempt19-21ksoftirqd/123:27:541
1089299511,0cyclictest378-21apt-get21:23:401
1089199512,0cyclictest0-21swapper/020:59:260
81500,0rcu_preempt19-21ksoftirqd/121:09:161
81500,0rcu_preempt19-21ksoftirqd/119:58:561
81500,0rcu_preempt19-21ksoftirqd/100:35:011
10891995011,0cyclictest14774-21sshd19:18:540
81490,0rcu_preempt19-21ksoftirqd/123:33:411
81490,0rcu_preempt19-21ksoftirqd/123:13:301
81490,0rcu_preempt19-21ksoftirqd/120:19:181
81490,0rcu_preempt15560-21kworker/1:020:06:561
81480,0rcu_preempt19-21ksoftirqd/123:53:461
1089299481,0cyclictest2347-21ssh21:58:401
1089299481,0cyclictest17885-21diskmemload22:18:391
81470,0rcu_preempt19-21ksoftirqd/121:36:061
1089299472,0cyclictest22115-21ssh00:30:151
1089299472,0cyclictest17033-21apt-get22:13:421
1089299471,0cyclictest17885-21diskmemload23:41:451
1089199472,0cyclictest0-21swapper/019:08:290
81460,0rcu_preempt19-21ksoftirqd/122:03:411
81460,0rcu_preempt19-21ksoftirqd/120:23:491
81450,0rcu_preempt19-21ksoftirqd/122:33:401
81450,0rcu_preempt19-21ksoftirqd/120:13:511
1089299452,0cyclictest0-21swapper/121:03:541
1089299451,0cyclictest17885-21diskmemload21:28:491
81440,0rcu_preempt19-21ksoftirqd/119:39:001
81440,0rcu_preempt19-21ksoftirqd/119:19:051
1089299446,0cyclictest1339-21snmpd19:48:391
1089299442,0cyclictest9528-21runrttasks20:42:061
1089299442,0cyclictest25807-21munin-node1
1089299442,0cyclictest25807-21munin-node1
1089299442,0cyclictest15140-21apt-get21:38:401
1089299442,0cyclictest12673-21apt-get19:13:401
1089299442,0cyclictest0-21swapper/120:08:411
1089299441,0cyclictest0-21swapper/120:58:401
81430,0rcu_preempt19-21ksoftirqd/120:48:461
1089299432,0cyclictest17809-21sh19:28:441
1089299431,0cyclictest9941-21munin-node1
1089299431,0cyclictest11036-21apt-get19:08:401
10892994310,0cyclictest14173-21ping19:43:571
81420,0rcu_preempt14173-21ping19:23:541
1089299422,0cyclictest0-21swapper/120:53:411
1089299417,0cyclictest19977-21proc_pri19:34:021
1089299412,0cyclictest4888-21apt-get20:28:411
81400,0rcu_preempt19-21ksoftirqd/119:03:451
1089299402,0cyclictest6778-21munin-node1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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