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2025-07-01 - 00:04

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Mon Jun 30, 2025 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811220,0rcu_preempt19-21ksoftirqd/109:55:351
811040,0rcu_preempt19-21ksoftirqd/110:32:161
10050830,0irq/346-484840041ktimersoftd/012:08:570
10050750,0irq/346-4848400111rcuc/011:22:030
81720,0rcu_preempt19-21ksoftirqd/108:22:171
81720,0rcu_preempt19-21ksoftirqd/107:27:191
81700,0rcu_preempt3-21ksoftirqd/011:49:430
81670,0rcu_preempt3-21ksoftirqd/010:41:380
81670,0rcu_preempt19-21ksoftirqd/111:12:281
81660,0rcu_preempt19-21ksoftirqd/107:26:541
81650,0rcu_preempt19-21ksoftirqd/109:35:471
81640,0rcu_preempt3-21ksoftirqd/011:37:070
81640,0rcu_preempt22036-21ping07:27:090
1875299642,0cyclictest0-21swapper/011:28:230
1875299642,0cyclictest0-21swapper/011:02:080
1875299642,0cyclictest0-21swapper/009:12:300
81630,0rcu_preempt19-21ksoftirqd/111:20:341
81620,0rcu_preempt3-21ksoftirqd/007:07:130
81620,0rcu_preempt19-21ksoftirqd/109:07:221
1875299622,0cyclictest24470-21ssh12:25:470
1875299622,0cyclictest0-21swapper/011:52:580
1875299622,0cyclictest0-21swapper/009:27:290
81610,0rcu_preempt3-21ksoftirqd/010:52:080
81610,0rcu_preempt3-21ksoftirqd/010:42:090
81610,0rcu_preempt19-21ksoftirqd/112:34:411
81610,0rcu_preempt19-21ksoftirqd/110:52:141
81610,0rcu_preempt19-21ksoftirqd/110:27:171
81610,0rcu_preempt19-21ksoftirqd/109:47:221
81610,0rcu_preempt10848-21kworker/0:108:37:260
1875299619,0cyclictest0-21swapper/010:33:190
1875299616,0cyclictest54-21kswapd012:34:330
1875299616,0cyclictest0-21swapper/011:11:230
1875299612,0cyclictest1361-21runrttasks10:50:480
1875299611,0cyclictest0-21swapper/010:01:340
18752996110,0cyclictest0-21swapper/007:32:080
81600,0rcu_preempt19-21ksoftirqd/110:18:081
1875299605,0cyclictest0-21swapper/012:15:460
1875299602,0cyclictest0-21swapper/010:58:210
1875299601,0cyclictest27870-1kworker/0:2H12:31:020
10050600,0irq/346-484840054-21kswapd011:34:341
81590,0rcu_preempt3-21ksoftirqd/010:02:180
81590,0rcu_preempt19-21ksoftirqd/111:39:081
1875299597,0cyclictest3-21ksoftirqd/010:27:100
1875299592,0cyclictest22036-21ping07:17:070
1875299592,0cyclictest19308-21apt08:47:080
1875299592,0cyclictest0-21swapper/007:57:260
1875299591,0cyclictest6549-21ssh09:23:440
1875299591,0cyclictest12964-21seq09:32:350
81580,0rcu_preempt26015-21apt-get09:07:090
81580,0rcu_preempt19-21ksoftirqd/107:32:541
1875299582,0cyclictest9622-21latency10:12:200
1875299582,0cyclictest0-21swapper/010:10:560
1875299582,0cyclictest0-21swapper/007:37:120
18752995812,0cyclictest6409-21munin-run12:06:530
10050580,0irq/346-484840018423-1kworker/0:3H12:20:470
81570,0rcu_preempt9059-21kworker/0:208:15:160
81570,0rcu_preempt3-21ksoftirqd/011:35:540
81570,0rcu_preempt2439-21ping08:17:130
81570,0rcu_preempt19-21ksoftirqd/111:29:321
81570,0rcu_preempt19-21ksoftirqd/111:07:001
81570,0rcu_preempt19-21ksoftirqd/110:07:111
1875299572,0cyclictest25514-21idleruntime-cro11:16:540
1875299572,0cyclictest22036-21ping07:22:060
1875299572,0cyclictest0-21swapper/008:11:540
18752995711,0cyclictest5889-1kworker/0:0H09:37:390
81560,0rcu_preempt19-21ksoftirqd/112:22:041
81560,0rcu_preempt19-21ksoftirqd/111:26:071
81560,0rcu_preempt19-21ksoftirqd/108:02:141
1875299565,0cyclictest54-21kswapd009:43:230
1875299562,0cyclictest294562sleep009:55:430
1875299562,0cyclictest22607-21munin-node0
1875299562,0cyclictest22607-21munin-node0
1875299562,0cyclictest22036-21ping07:42:080
1875299562,0cyclictest0-21swapper/010:18:500
18752995613,0cyclictest10050irq/346-484840011:44:470
18752995611,0cyclictest25725-21diskmemload09:17:260
10050560,0irq/346-484840027163-1kworker/0:2H11:58:400
81550,0rcu_preempt3-21ksoftirqd/009:47:250
81550,0rcu_preempt3-21ksoftirqd/007:02:060
81550,0rcu_preempt19-21ksoftirqd/109:41:391
81550,0rcu_preempt0-21swapper/108:17:151
1875299552,0cyclictest25740-21apt-get11:17:080
1875299552,0cyclictest0-21swapper/007:52:140
18752995516,0cyclictest0-21swapper/010:22:190
1875299551,0cyclictest22036-21ping07:16:540
18752995510,0cyclictest25195-21tail09:02:270
81530,0rcu_preempt19-21ksoftirqd/112:07:241
1875299539,0cyclictest9035-1kworker/0:2H08:24:160
10050530,0irq/346-484840054-21kswapd012:00:131
10050530,0irq/346-484840054-21kswapd009:24:491
81520,0rcu_preempt19-21ksoftirqd/112:12:221
81520,0rcu_preempt19-21ksoftirqd/112:02:231
1875299522,0cyclictest0-21swapper/008:32:160
81510,0rcu_preempt19-21ksoftirqd/110:58:381
81510,0rcu_preempt19-21ksoftirqd/109:57:121
81510,0rcu_preempt19-21ksoftirqd/107:57:071
1875299512,0cyclictest4770-21fschecks_count08:02:140
18752995111,0cyclictest21511-21latency08:52:210
10050510,0irq/346-484840018583-21ssh10:23:541
10050510,0irq/346-484840017689-1kworker/1:0H11:55:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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