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2025-09-19 - 00:17

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 Sep 18, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt2340-1kworker/0:1H07:30:410
81820,0rcu_preempt28472-21kworker/0:010:25:040
81740,0rcu_preempt4178-1kworker/0:2H07:40:500
81730,0rcu_preempt3-21ksoftirqd/010:11:330
81680,0rcu_preempt5248-21apt-get12:10:510
10050680,0irq/346-484840023206-1kworker/0:1H11:56:010
81670,0rcu_preempt3-21ksoftirqd/010:05:550
2799799664,0cyclictest14737-21ssh09:20:570
81650,0rcu_preempt3-21ksoftirqd/007:05:500
2799799657,0cyclictest0-21swapper/011:27:250
27997996510,0cyclictest10901-21ssh12:16:100
2799799643,0cyclictest0-21swapper/011:40:510
27997996419,0cyclictest17835-21ssh11:49:420
2799799638,0cyclictest54-21kswapd012:23:280
81620,0rcu_preempt3-21ksoftirqd/012:04:140
81620,0rcu_preempt13839-21df_inode10:35:560
2799799621,0cyclictest10536-21awk09:55:400
9950610,0irq/345-484840014285-1kworker/1:0H09:20:571
81610,0rcu_preempt3-21ksoftirqd/008:06:040
81610,0rcu_preempt19-21ksoftirqd/107:37:521
2799799617,0cyclictest4370-1kworker/0:1H09:06:550
2799799615,0cyclictest30327-1kworker/0:1H11:35:490
2799799613,0cyclictest0-21swapper/012:26:050
2799799611,0cyclictest13006-21runrttasks09:57:530
81600,0rcu_preempt3-21ksoftirqd/008:51:440
81600,0rcu_preempt21630-21ssh11:53:260
81600,0rcu_preempt21630-21ssh11:53:260
2799799607,0cyclictest1376-1kworker/0:2H11:05:450
2799799603,0cyclictest0-21swapper/012:32:570
2799799602,0cyclictest4178-1kworker/0:2H07:35:590
2799799602,0cyclictest13999-21dropbear08:00:560
2799799602,0cyclictest13999-21dropbear08:00:560
2799799601,0cyclictest4595-21ssh10:25:550
2799799601,0cyclictest13375-21grep10:35:400
10050600,0irq/346-48484008419-1kworker/0:3H07:45:580
81590,0rcu_preempt19-21ksoftirqd/112:11:031
2799799595,0cyclictest22979-21latency09:31:030
2799799592,0cyclictest27712-21ssh09:36:140
81580,0rcu_preempt3-21ksoftirqd/008:11:000
81580,0rcu_preempt0-21swapper/008:50:090
2799799586,0cyclictest0-21swapper/011:01:390
2799799583,0cyclictest0-21swapper/010:45:490
2799799582,0cyclictest27708-21fschecks_time10:51:000
27997995819,0cyclictest308582chrt07:11:220
27997995815,0cyclictest21867-1kworker/0:1H08:30:580
2799799581,0cyclictest28286-21ssh10:16:050
2799799581,0cyclictest22483-21runrttasks08:25:590
2799799581,0cyclictest1651850kworker/0:3H09:26:460
81570,0rcu_preempt3-21ksoftirqd/009:40:480
2799799573,0cyclictest2627-21latency_hist09:05:390
2799799573,0cyclictest0-21swapper/007:16:080
2799799572,0cyclictest0-21swapper/011:20:090
27997995713,0cyclictest23393-21munin-node0
2799799571,0cyclictest7396-21ssh09:11:060
81560,0rcu_preempt27996-21cyclictest11:31:491
81560,0rcu_preempt19-21ksoftirqd/111:06:391
2799799565,0cyclictest0-21swapper/010:56:260
2799799562,0cyclictest0-21swapper/010:42:240
2799799562,0cyclictest0-21swapper/010:00:470
2799799562,0cyclictest0-21swapper/007:21:100
27997995612,0cyclictest1361-21runrttasks08:00:070
27997995611,0cyclictest2410-21munin-node0
2799799561,0cyclictest11338-21ssh09:16:080
81550,0rcu_preempt3-21ksoftirqd/008:58:040
2799799559,0cyclictest2625-21diskmemload11:11:160
2799799555,0cyclictest2243-21latency_hist07:25:410
2799799552,0cyclictest0-21swapper/012:05:500
2799799552,0cyclictest0-21swapper/011:31:510
27997995512,0cyclictest26870-21wc08:40:390
27997995512,0cyclictest10360-1kworker/0:0H07:50:540
2799799551,0cyclictest26965-21apt-get08:40:510
10050550,0irq/346-484840016110-1kworker/1:3H11:17:191
81540,0rcu_preempt19-21ksoftirqd/108:15:401
2799799542,0cyclictest17292-1kworker/0:2H08:21:080
10050540,0irq/346-484840054-21kswapd012:03:491
10050540,0irq/346-484840054-21kswapd009:09:111
10050540,0irq/346-484840019112-21cut10:05:491
10050540,0irq/346-484840016735-1kworker/1:0H12:25:091
81530,0rcu_preempt0-21swapper/109:39:111
2799799531,0cyclictest18926-21sh08:15:560
81510,0rcu_preempt19-21ksoftirqd/108:00:521
81510,0rcu_preempt19-21ksoftirqd/108:00:521
10050510,0irq/346-484840054-21kswapd011:01:331
10050510,0irq/346-484840027305-21ssh11:25:261
10050510,0irq/346-484840021734-21ssh11:53:351
10050510,0irq/346-484840021734-21ssh11:53:351
10050510,0irq/346-484840011392-1kworker/1:1H10:36:151
9950500,0irq/345-484840024649-1kworker/1:2H12:31:461
10050500,0irq/346-484840027996-21cyclictest12:06:461
9950490,0irq/345-484840011392-1kworker/1:1H10:35:241
10050490,0irq/346-484840054-21kswapd010:45:001
10050490,0irq/346-484840024699-21ssh10:11:201
10050490,0irq/346-484840012873-21ssh11:44:221
10050480,0irq/346-484840054-21kswapd010:22:381
81470,0rcu_preempt27329-21grep07:01:070
10050470,0irq/346-484840054-21kswapd012:29:571
10050470,0irq/346-484840024911-21ssh09:33:271
10050470,0irq/346-484840016570-21ssh10:01:531
81460,0rcu_preempt19-21ksoftirqd/110:30:251
81460,0rcu_preempt19-21ksoftirqd/108:21:051
10050460,0irq/346-484840025473-21ssh10:48:181
81450,0rcu_preempt19-21ksoftirqd/109:50:401
81450,0rcu_preempt19-21ksoftirqd/107:41:061
81440,0rcu_preempt906-21dropbear10:50:581
81440,0rcu_preempt29671-21ssh11:27:081
81440,0rcu_preempt19-21ksoftirqd/110:56:011
81440,0rcu_preempt19-21ksoftirqd/109:45:571
81440,0rcu_preempt19-21ksoftirqd/107:55:401
81440,0rcu_preempt19-21ksoftirqd/107:25:581
81440,0rcu_preempt19-21ksoftirqd/107:21:181
10050440,0irq/346-484840054-21kswapd012:19:181
10050440,0irq/346-484840031291-21ssh10:19:471
10050440,0irq/346-484840027872-21cron12:00:391
10050440,0irq/346-484840017350-21ssh11:49:011
10050440,0irq/346-484840014081-21ssh09:20:181
10050440,0irq/346-48484001181-21ssh09:44:061
81430,0rcu_preempt19-21ksoftirqd/111:12:511
81430,0rcu_preempt19-21ksoftirqd/109:58:291
81430,0rcu_preempt19-21ksoftirqd/108:10:521
81430,0rcu_preempt19-21ksoftirqd/108:10:391
10050430,0irq/346-484840010278-21ssh09:15:351
81420,0rcu_preempt19-21ksoftirqd/107:16:091
81420,0rcu_preempt19-21ksoftirqd/107:00:581
81410,0rcu_preempt29263-21seq07:06:511
81410,0rcu_preempt19-21ksoftirqd/109:26:431
81410,0rcu_preempt19-21ksoftirqd/107:30:411
81400,0rcu_preempt19-21ksoftirqd/109:00:391
10050400,0irq/346-48484005017-21sh11:35:561
81390,0rcu_preempt13187-21sed07:56:111
10050380,0irq/346-48484000-21swapper/108:50:441
81370,0rcu_preempt19-21ksoftirqd/108:40:531
10050370,0irq/346-484840025526-21ssh08:35:551
81360,0rcu_preempt19-21ksoftirqd/108:30:571
81360,0rcu_preempt19-21ksoftirqd/108:25:561
81360,0rcu_preempt19-21ksoftirqd/107:11:031
81350,0rcu_preempt19-21ksoftirqd/109:00:401
10050350,0irq/346-484840028697-21wget08:45:531
81340,0rcu_preempt19-21ksoftirqd/107:46:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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