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2026-07-05 - 18:41

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun Jul 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050750,0irq/346-484840054-21kswapd010:57:440
81730,0rcu_preempt54-21kswapd009:38:450
2525699736,0cyclictest0-21swapper/011:42:050
81720,0rcu_preempt3-21ksoftirqd/009:08:280
81710,0rcu_preempt3-21ksoftirqd/012:18:160
81710,0rcu_preempt3-21ksoftirqd/012:18:160
81710,0rcu_preempt3-21ksoftirqd/009:02:350
81690,0rcu_preempt12462-21kworker/0:208:12:210
81680,0rcu_preempt29108-21apt-get08:57:230
2525699671,0cyclictest19980-21apt-get09:27:240
81660,0rcu_preempt3-21ksoftirqd/011:52:310
2525699661,0cyclictest54-21kswapd012:28:060
2525699661,0cyclictest54-21kswapd012:28:060
2525699661,0cyclictest0-21swapper/010:01:160
25256996610,0cyclictest7373-21kernelversion11:57:330
81650,0rcu_preempt17793-21memory11:02:360
2525699652,0cyclictest10809-21munin-node0
2525699651,0cyclictest9458-1kworker/0:0H10:55:310
2525699651,0cyclictest6472-1kworker/0:1H12:32:280
2525699642,0cyclictest16931-21ssh12:07:300
2525699642,0cyclictest16931-21ssh12:07:300
2525699642,0cyclictest0-21swapper/011:24:300
81630,0rcu_preempt32231-21diskmemload12:22:410
2525699636,0cyclictest26985-1kworker/0:2H10:42:570
2525699632,0cyclictest0-21swapper/009:52:230
2525699632,0cyclictest0-21swapper/009:44:280
10050630,0irq/346-484840054-21kswapd010:51:081
81620,0rcu_preempt19597-21dropbear11:37:261
2525699625,0cyclictest16993-1kworker/0:0H10:32:380
2525699622,0cyclictest0-21swapper/011:12:470
2525699622,0cyclictest0-21swapper/011:07:390
2525699621,0cyclictest0-21swapper/011:43:480
81610,0rcu_preempt32231-21diskmemload10:17:310
81610,0rcu_preempt22534-21apt-get08:37:220
81610,0rcu_preempt17602-21apt-get08:22:220
2525699614,0cyclictest24546-1kworker/0:3H10:08:590
2525699612,0cyclictest0-21swapper/012:02:280
10050610,0irq/346-4848400851-21rngd10:12:200
81600,0rcu_preempt3-21ksoftirqd/011:27:340
2525699602,0cyclictest2234-1kworker/0:3H09:12:380
2525699602,0cyclictest2234-1kworker/0:3H09:12:380
2525699602,0cyclictest0-21swapper/011:32:230
2525699602,0cyclictest0-21swapper/011:32:230
2525699602,0cyclictest0-21swapper/009:20:450
2525699601,0cyclictest9950irq/345-484840011:49:300
2525699601,0cyclictest9403-21apt07:57:220
2525699601,0cyclictest22351-21diskmemload12:12:350
10050600,0irq/346-484840012019-1kworker/1:1H10:37:501
9950590,0irq/345-4848400851-21rngd10:14:151
2525699592,0cyclictest0-21swapper/010:37:350
2525699592,0cyclictest0-21swapper/010:28:150
2525699592,0cyclictest0-21swapper/007:42:300
25256995913,0cyclictest3411-21ssh11:21:100
10050590,0irq/346-484840054-21kswapd009:41:291
81580,0rcu_preempt19-21ksoftirqd/112:30:491
81580,0rcu_preempt19-21ksoftirqd/112:30:491
81580,0rcu_preempt19-21ksoftirqd/107:32:151
81580,0rcu_preempt15969-21apt-get08:17:220
2525699582,0cyclictest22371-21chrt08:37:110
2525699582,0cyclictest0-21swapper/007:12:360
2525699582,0cyclictest0-21swapper/007:12:360
81570,0rcu_preempt8416-21ntp_states07:52:341
2525699574,0cyclictest28537-21ping07:27:230
2525699573,0cyclictest0-21swapper/009:34:450
2525699572,0cyclictest9686-21ssh09:49:010
2525699572,0cyclictest0-21swapper/008:52:230
2525699571,0cyclictest23108-21ntpq10:02:360
2525699571,0cyclictest23108-21ntpq10:02:360
2525699571,0cyclictest0-21swapper/007:32:350
81560,0rcu_preempt3-21ksoftirqd/007:52:330
2525699563,0cyclictest54-21kswapd009:23:540
2525699561,0cyclictest28537-21ping07:17:250
25256995610,0cyclictest2913-21ssh10:47:350
81550,0rcu_preempt3-21ksoftirqd/008:27:360
81550,0rcu_preempt19-21ksoftirqd/110:44:281
2525699552,0cyclictest28537-21ping07:22:230
2525699552,0cyclictest0-21swapper/008:42:280
81540,0rcu_preempt19-21ksoftirqd/111:57:321
2525699542,0cyclictest11644-21sed08:02:350
2525699542,0cyclictest0-21swapper/007:07:580
10050540,0irq/346-484840054-21kswapd011:34:511
10050540,0irq/346-484840054-21kswapd011:34:511
10050540,0irq/346-484840054-21kswapd011:21:251
10050540,0irq/346-484840054-21kswapd009:14:281
10050540,0irq/346-484840054-21kswapd009:14:281
10050540,0irq/346-484840029281-1kworker/1:0H11:23:591
10050530,0irq/346-48484007063-1kworker/1:0H10:19:511
10050530,0irq/346-484840054-21kswapd012:36:271
10050530,0irq/346-484840054-21kswapd012:18:001
10050530,0irq/346-484840054-21kswapd012:18:001
81520,0rcu_preempt3-21ksoftirqd/008:07:400
81520,0rcu_preempt23749-21apt-get07:02:210
2525699522,0cyclictest28537-21ping07:37:240
2525699522,0cyclictest0-21swapper/008:47:360
2525699522,0cyclictest0-21swapper/008:47:360
10050520,0irq/346-4848400851-21rngd10:36:311
10050520,0irq/346-484840054-21kswapd012:23:501
10050520,0irq/346-484840054-21kswapd010:09:471
10050520,0irq/346-484840016725-21ssh11:02:061
2525699511,0cyclictest7581-21cron07:52:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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