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2026-03-22 - 23:24

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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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 792 highest latencies:
System rackaslot5s.osadl.org (updated Sun Mar 22, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt19-21ksoftirqd/107:38:531
81690,0rcu_preempt54-21kswapd011:29:201
81680,0rcu_preempt3-21ksoftirqd/008:24:030
81670,0rcu_preempt23803-21hostname10:19:070
81630,0rcu_preempt25615-1kworker/0:2H12:24:130
10050630,0irq/346-484840031095-1kworker/0:1H10:28:410
81610,0rcu_preempt3-21ksoftirqd/011:01:460
81570,0rcu_preempt3-21ksoftirqd/010:11:460
81560,0rcu_preempt3-21ksoftirqd/010:34:100
81560,0rcu_preempt3-21ksoftirqd/008:17:200
81560,0rcu_preempt3-21ksoftirqd/007:59:070
81550,0rcu_preempt3-21ksoftirqd/012:19:030
10050550,0irq/346-48484000-21swapper/009:43:010
81540,0rcu_preempt454-21ntp_states08:09:180
81530,0rcu_preempt7072-21apt-get12:14:040
81530,0rcu_preempt3-21ksoftirqd/012:05:480
81530,0rcu_preempt3-21ksoftirqd/011:59:130
81530,0rcu_preempt3-21ksoftirqd/011:45:070
81530,0rcu_preempt3-21ksoftirqd/011:45:070
81530,0rcu_preempt3-21ksoftirqd/011:33:530
81530,0rcu_preempt3-21ksoftirqd/011:29:130
81530,0rcu_preempt3-21ksoftirqd/010:44:200
81530,0rcu_preempt3-21ksoftirqd/010:14:190
81530,0rcu_preempt3-21ksoftirqd/010:04:530
81530,0rcu_preempt3-21ksoftirqd/007:14:110
81530,0rcu_preempt23478-21munin-node0
81520,0rcu_preempt3-21ksoftirqd/011:14:060
81520,0rcu_preempt3-21ksoftirqd/009:14:100
81520,0rcu_preempt19-21ksoftirqd/107:24:071
10050520,0irq/346-484840019140-21ssh11:19:210
81510,0rcu_preempt3-21ksoftirqd/009:56:260
81510,0rcu_preempt3-21ksoftirqd/009:34:250
81510,0rcu_preempt3-21ksoftirqd/008:21:180
81510,0rcu_preempt2895-21kworker/1:210:42:491
81510,0rcu_preempt0-21swapper/111:57:361
10050510,0irq/346-484840014223-1kworker/0:0H09:59:100
81500,0rcu_preempt3-21ksoftirqd/011:54:140
81500,0rcu_preempt3-21ksoftirqd/009:26:010
10050500,0irq/346-48484000-21swapper/011:10:530
81490,0rcu_preempt3-21ksoftirqd/010:53:280
81490,0rcu_preempt3-21ksoftirqd/009:48:540
81490,0rcu_preempt2895-21kworker/1:211:24:051
81490,0rcu_preempt21798-21df12:29:060
81490,0rcu_preempt19-21ksoftirqd/108:17:491
81490,0rcu_preempt13189-21diskstats08:49:090
10050490,0irq/346-48484003-21ksoftirqd/007:43:530
10050490,0irq/346-484840023651-1kworker/0:0H12:33:580
10050490,0irq/346-48484000-21swapper/011:42:260
81480,0rcu_preempt3-21ksoftirqd/011:49:130
81480,0rcu_preempt3-21ksoftirqd/010:56:520
81480,0rcu_preempt3-21ksoftirqd/010:39:050
81480,0rcu_preempt3-21ksoftirqd/007:49:160
81480,0rcu_preempt19-21ksoftirqd/110:26:291
81480,0rcu_preempt19-21ksoftirqd/107:59:261
81480,0rcu_preempt19-21ksoftirqd/107:29:191
81480,0rcu_preempt17747-21wget07:24:130
10050480,0irq/346-484840012379-21munin-run07:08:520
81470,0rcu_preempt5784-21ssh11:39:111
81470,0rcu_preempt54-21kswapd009:55:321
81470,0rcu_preempt3-21ksoftirqd/012:09:130
81470,0rcu_preempt3-21ksoftirqd/010:32:390
81470,0rcu_preempt3-21ksoftirqd/009:44:040
81470,0rcu_preempt3-21ksoftirqd/009:19:110
81470,0rcu_preempt3-21ksoftirqd/009:13:230
81470,0rcu_preempt3-21ksoftirqd/009:04:100
81470,0rcu_preempt3-21ksoftirqd/008:29:120
81470,0rcu_preempt3-21ksoftirqd/008:04:200
81470,0rcu_preempt19-21ksoftirqd/111:47:071
81470,0rcu_preempt19-21ksoftirqd/111:47:071
81470,0rcu_preempt19-21ksoftirqd/110:54:041
81470,0rcu_preempt19-21ksoftirqd/110:19:061
81470,0rcu_preempt19-21ksoftirqd/108:19:431
10050470,0irq/346-48484006735-21ssh09:28:550
81460,0rcu_preempt3-21ksoftirqd/008:39:080
81460,0rcu_preempt3-21ksoftirqd/007:54:050
81460,0rcu_preempt2423-21ssh12:09:081
81460,0rcu_preempt19399-21diskmemload12:37:491
81460,0rcu_preempt14613-21apt-get08:54:040
81460,0rcu_preempt11544-21diskstats08:44:100
81460,0rcu_preempt0-21swapper/110:59:571
81460,0rcu_preempt0-21swapper/109:22:591
10050460,0irq/346-48484005801-1kworker/0:1H11:08:520
10050460,0irq/346-48484003-21ksoftirqd/007:35:410
81450,0rcu_preempt19-21ksoftirqd/112:24:271
81450,0rcu_preempt19-21ksoftirqd/110:14:091
81450,0rcu_preempt19-21ksoftirqd/110:09:211
81450,0rcu_preempt19-21ksoftirqd/109:14:171
81440,0rcu_preempt3-21ksoftirqd/007:19:160
81440,0rcu_preempt19-21ksoftirqd/110:04:061
81440,0rcu_preempt19-21ksoftirqd/109:34:151
81440,0rcu_preempt19-21ksoftirqd/109:32:491
81440,0rcu_preempt19-21ksoftirqd/108:09:211
81440,0rcu_preempt19-21ksoftirqd/108:06:501
81440,0rcu_preempt19-21ksoftirqd/107:18:571
81440,0rcu_preempt16989-21ps08:59:160
81430,0rcu_preempt19-21ksoftirqd/111:19:021
81430,0rcu_preempt19-21ksoftirqd/109:51:451
81430,0rcu_preempt19-21ksoftirqd/109:46:161
81420,0rcu_preempt3-21ksoftirqd/008:36:030
81420,0rcu_preempt3-21ksoftirqd/007:44:250
81420,0rcu_preempt3-21ksoftirqd/007:13:530
81420,0rcu_preempt19399-21diskmemload11:10:311
81420,0rcu_preempt19-21ksoftirqd/112:15:161
81420,0rcu_preempt19-21ksoftirqd/111:34:161
81420,0rcu_preempt19-21ksoftirqd/111:14:211
81420,0rcu_preempt19-21ksoftirqd/111:05:591
81420,0rcu_preempt19-21ksoftirqd/109:09:131
81410,0rcu_preempt3-21ksoftirqd/007:29:210
81410,0rcu_preempt19-21ksoftirqd/112:29:121
81410,0rcu_preempt19-21ksoftirqd/110:31:261
81410,0rcu_preempt19-21ksoftirqd/107:17:561
81400,0rcu_preempt19399-21diskmemload10:02:091
81400,0rcu_preempt19-21ksoftirqd/112:23:201
81400,0rcu_preempt19-21ksoftirqd/110:49:151
81400,0rcu_preempt19-21ksoftirqd/110:46:141
81400,0rcu_preempt19-21ksoftirqd/109:01:371
81400,0rcu_preempt19-21ksoftirqd/108:30:421
81400,0rcu_preempt19-21ksoftirqd/108:25:441
81400,0rcu_preempt19-21ksoftirqd/107:11:241
81390,0rcu_preempt19-21ksoftirqd/112:07:561
81390,0rcu_preempt19-21ksoftirqd/112:01:591
81390,0rcu_preempt19-21ksoftirqd/110:38:001
81390,0rcu_preempt19-21ksoftirqd/109:26:341
81390,0rcu_preempt19-21ksoftirqd/109:06:201
81390,0rcu_preempt19-21ksoftirqd/108:56:411
81390,0rcu_preempt19-21ksoftirqd/108:39:531
81390,0rcu_preempt19-21ksoftirqd/108:34:161
81390,0rcu_preempt19-21ksoftirqd/107:44:111
81380,0rcu_preempt19-21ksoftirqd/111:51:291
81380,0rcu_preempt19-21ksoftirqd/109:39:041
81380,0rcu_preempt19-21ksoftirqd/108:52:251
81380,0rcu_preempt19-21ksoftirqd/108:44:221
81380,0rcu_preempt19-21ksoftirqd/107:50:321
81380,0rcu_preempt19-21ksoftirqd/107:08:441
81370,0rcu_preempt19-21ksoftirqd/107:53:551
9950350,0irq/345-484840023900-21idleruntime-cro07:43:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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