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2025-11-20 - 22:46

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 Nov 20, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81760,0rcu_preempt16511-21cyclictest10:15:491
81750,0rcu_preempt15099-21kworker/0:008:54:480
81720,0rcu_preempt19-21ksoftirqd/107:19:371
81680,0rcu_preempt5058-1kworker/0:4H11:44:360
202082670,0sleep09950irq/345-484840007:19:580
81650,0rcu_preempt3-21ksoftirqd/008:30:000
81640,0rcu_preempt3-21ksoftirqd/009:44:500
18272640,0sleep010050irq/346-484840008:01:400
18272640,0sleep010050irq/346-484840008:01:400
81620,0rcu_preempt3-21ksoftirqd/008:49:480
81620,0rcu_preempt3-21ksoftirqd/007:54:500
81610,0rcu_preempt3-21ksoftirqd/010:39:490
81610,0rcu_preempt3-21ksoftirqd/010:39:490
81600,0rcu_preempt3-21ksoftirqd/011:39:370
81590,0rcu_preempt3-21ksoftirqd/011:24:500
81590,0rcu_preempt3-21ksoftirqd/008:59:500
81580,0rcu_preempt3-21ksoftirqd/011:59:540
81580,0rcu_preempt3-21ksoftirqd/009:59:460
69752580,0sleep010050irq/346-484840008:19:240
81570,0rcu_preempt3-21ksoftirqd/011:15:350
81570,0rcu_preempt3-21ksoftirqd/010:24:470
81570,0rcu_preempt3-21ksoftirqd/010:24:470
81570,0rcu_preempt3-21ksoftirqd/008:25:160
81560,0rcu_preempt5979-21apt-get10:14:480
81560,0rcu_preempt3-21ksoftirqd/011:55:170
81560,0rcu_preempt3-21ksoftirqd/008:10:010
10050560,0irq/346-484840054-21kswapd009:59:581
10050560,0irq/346-484840031045-1kworker/0:1H11:35:590
81550,0rcu_preempt3-21ksoftirqd/011:30:020
81550,0rcu_preempt3-21ksoftirqd/010:19:460
81550,0rcu_preempt3-21ksoftirqd/010:09:490
81540,0rcu_preempt3-21ksoftirqd/010:55:010
81540,0rcu_preempt27875-21apt-get10:44:460
81540,0rcu_preempt19-21ksoftirqd/112:19:461
81540,0rcu_preempt19-21ksoftirqd/108:25:131
16512995410,0cyclictest0-21swapper/010:09:130
10050540,0irq/346-484840016822-1kworker/0:0H10:29:380
81530,0rcu_preempt3-21ksoftirqd/012:04:590
81530,0rcu_preempt3-21ksoftirqd/009:34:550
81530,0rcu_preempt3-21ksoftirqd/009:15:080
159122530,0sleep09950irq/345-484840009:44:070
10050530,0irq/346-484840015090-21munin-run12:34:360
81520,0rcu_preempt798-21kworker/0:012:36:090
81520,0rcu_preempt3-21ksoftirqd/012:15:020
81520,0rcu_preempt3-21ksoftirqd/010:59:570
81520,0rcu_preempt3-21ksoftirqd/010:34:480
81520,0rcu_preempt3-21ksoftirqd/009:24:530
81520,0rcu_preempt19-21ksoftirqd/108:09:471
81520,0rcu_preempt1834-21kworker/0:008:04:490
10050520,0irq/346-48484007339-21ssh11:44:531
10050520,0irq/346-484840054-21kswapd009:50:060
10050520,0irq/346-48484004674-1kworker/1:4H10:59:471
10050520,0irq/346-48484003464-21munin-node1
10050520,0irq/346-484840019606-1kworker/1:3H11:25:031
81510,0rcu_preempt3-21ksoftirqd/010:49:530
81510,0rcu_preempt3-21ksoftirqd/009:19:480
10050510,0irq/346-48484004205-1kworker/1:1H12:30:591
10050510,0irq/346-484840025472-1kworker/1:1H09:13:481
81500,0rcu_preempt3-21ksoftirqd/012:27:060
81500,0rcu_preempt3-21ksoftirqd/009:04:450
81500,0rcu_preempt19-21ksoftirqd/108:19:381
10050500,0irq/346-484840019606-1kworker/1:3H11:19:591
10050500,0irq/346-48484000-21swapper/109:50:351
10050500,0irq/346-48484000-21swapper/109:27:501
9950490,0irq/345-48484000-21swapper/107:35:021
9950490,0irq/345-48484000-21swapper/107:35:021
81490,0rcu_preempt4981-21kworker/0:009:30:040
81490,0rcu_preempt4981-21kworker/0:009:30:040
81490,0rcu_preempt3-21ksoftirqd/012:24:230
81490,0rcu_preempt3-21ksoftirqd/011:04:500
81490,0rcu_preempt19-21ksoftirqd/108:29:541
10050490,0irq/346-48484004375-1kworker/1:0H10:24:561
10050490,0irq/346-48484004375-1kworker/1:0H10:24:561
10050490,0irq/346-48484003-21ksoftirqd/007:30:100
10050490,0irq/346-484840012245-1kworker/1:2H11:09:341
81480,0rcu_preempt3-21ksoftirqd/011:50:050
81480,0rcu_preempt3-21ksoftirqd/011:19:530
81480,0rcu_preempt3-21ksoftirqd/011:09:450
81480,0rcu_preempt3-21ksoftirqd/011:09:450
81480,0rcu_preempt3-21ksoftirqd/009:55:000
81480,0rcu_preempt3-21ksoftirqd/009:10:090
81480,0rcu_preempt3-21ksoftirqd/008:39:480
81480,0rcu_preempt3-21ksoftirqd/008:19:570
10050480,0irq/346-484840024373-1kworker/1:0H12:14:541
10050480,0irq/346-484840023821-1kworker/1:1H10:39:591
10050480,0irq/346-484840023821-1kworker/1:1H10:39:591
81470,0rcu_preempt3-21ksoftirqd/012:10:470
81470,0rcu_preempt3-21ksoftirqd/007:10:030
81470,0rcu_preempt19-21ksoftirqd/111:58:151
10050470,0irq/346-484840032550-1kworker/1:4H09:22:051
10050470,0irq/346-484840016069-1kworker/1:0H11:14:581
81460,0rcu_preempt19-21ksoftirqd/110:44:461
81460,0rcu_preempt19-21ksoftirqd/107:22:181
10050460,0irq/346-484840028479-1kworker/1:1H12:12:031
10050460,0irq/346-484840020233-21date08:59:371
10050460,0irq/346-484840019818-21ssh10:33:361
10050460,0irq/346-48484000-21swapper/109:47:101
9950450,0irq/345-48484009660-1kworker/1:3H10:50:321
9950450,0irq/345-484840025472-1kworker/1:1H09:17:181
81450,0rcu_preempt19-21ksoftirqd/107:39:501
81450,0rcu_preempt19-21ksoftirqd/107:04:561
81450,0rcu_preempt13113-21users08:35:100
10050450,0irq/346-484840026710-21diskstats07:39:570
10050450,0irq/346-484840012245-1kworker/1:2H11:10:361
10050450,0irq/346-484840012245-1kworker/1:2H11:10:361
81440,0rcu_preempt489-21php-cgi11:35:291
81440,0rcu_preempt3-21ksoftirqd/007:15:060
81440,0rcu_preempt19-21ksoftirqd/110:34:481
81440,0rcu_preempt19-21ksoftirqd/108:15:111
81440,0rcu_preempt19-21ksoftirqd/107:30:001
81440,0rcu_preempt0-21swapper/008:44:460
1651299449,0cyclictest27662-1kworker/0:1H07:51:230
144412440,0sleep19950irq/345-484840009:41:181
10050440,0irq/346-484840019782-21ping07:25:111
10050440,0irq/346-48484000-21swapper/111:39:371
81430,0rcu_preempt19-21ksoftirqd/112:26:231
81430,0rcu_preempt19-21ksoftirqd/107:10:031
10050430,0irq/346-484840016497-21munin-plugin-st07:09:350
10050430,0irq/346-484840010858-1kworker/1:0H09:36:501
81420,0rcu_preempt31452-21kworker/0:107:25:000
81420,0rcu_preempt19-21ksoftirqd/109:29:471
81420,0rcu_preempt19-21ksoftirqd/109:29:471
81420,0rcu_preempt19-21ksoftirqd/107:50:041
81420,0rcu_preempt19-21ksoftirqd/107:44:371
1651299428,0cyclictest19782-21ping07:35:040
1651299428,0cyclictest19782-21ping07:35:040
10050420,0irq/346-4848400728-1kworker/1:2H10:09:311
81410,0rcu_preempt25866-21taskset12:08:401
81410,0rcu_preempt19-21ksoftirqd/111:29:511
81410,0rcu_preempt19-21ksoftirqd/109:54:561
10050410,0irq/346-48484008797-1kworker/1:2H11:59:531
10050410,0irq/346-48484008797-1kworker/1:2H11:50:001
10050410,0irq/346-484840019826-1kworker/1:2H08:59:361
81400,0rcu_preempt19-21ksoftirqd/112:35:001
81400,0rcu_preempt19-21ksoftirqd/110:20:011
81400,0rcu_preempt19-21ksoftirqd/110:09:491
81400,0rcu_preempt19-21ksoftirqd/108:09:371
81390,0rcu_preempt19-21ksoftirqd/108:34:541
81390,0rcu_preempt19-21ksoftirqd/108:04:361
81390,0rcu_preempt19-21ksoftirqd/108:04:361
81390,0rcu_preempt19-21ksoftirqd/107:58:391
1651299397,0cyclictest0-21swapper/007:45:050
81380,0rcu_preempt19-21ksoftirqd/108:49:361
81370,0rcu_preempt19-21ksoftirqd/108:49:481
81370,0rcu_preempt19-21ksoftirqd/108:44:361
81350,0rcu_preempt19-21ksoftirqd/109:04:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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