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2026-03-13 - 00:30

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 Mar 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811170,0rcu_preempt3-21ksoftirqd/012:24:140
811150,0rcu_preempt3-21ksoftirqd/010:34:140
811100,0rcu_preempt19-21ksoftirqd/111:24:141
811090,0rcu_preempt19-21ksoftirqd/111:59:251
811060,0rcu_preempt3-21ksoftirqd/010:20:480
811040,0rcu_preempt3-21ksoftirqd/009:34:190
811020,0rcu_preempt19-21ksoftirqd/111:12:381
811010,0rcu_preempt19-21ksoftirqd/111:44:131
81990,0rcu_preempt3-21ksoftirqd/011:54:020
81980,0rcu_preempt3-21ksoftirqd/011:29:020
81970,0rcu_preempt3-21ksoftirqd/010:16:510
81970,0rcu_preempt19-21ksoftirqd/109:39:291
81960,0rcu_preempt19-21ksoftirqd/109:09:261
81940,0rcu_preempt19-21ksoftirqd/110:24:251
81930,0rcu_preempt3-21ksoftirqd/007:34:210
81920,0rcu_preempt19-21ksoftirqd/110:29:261
81920,0rcu_preempt19-21ksoftirqd/110:19:151
81910,0rcu_preempt19-21ksoftirqd/109:29:241
81910,0rcu_preempt14648-21ssh11:04:171
81870,0rcu_preempt19-21ksoftirqd/109:24:291
81850,0rcu_preempt3-21ksoftirqd/008:29:240
81850,0rcu_preempt3-21ksoftirqd/007:59:290
81830,0rcu_preempt3-21ksoftirqd/012:33:110
81830,0rcu_preempt19-21ksoftirqd/112:14:271
81800,0rcu_preempt19-21ksoftirqd/112:04:281
81800,0rcu_preempt19-21ksoftirqd/110:14:161
81800,0rcu_preempt19-21ksoftirqd/110:04:231
81790,0rcu_preempt19-21ksoftirqd/112:33:301
81780,0rcu_preempt19-21ksoftirqd/108:09:031
81770,0rcu_preempt19-21ksoftirqd/110:54:141
81770,0rcu_preempt19-21ksoftirqd/109:59:281
81760,0rcu_preempt19-21ksoftirqd/112:34:131
81760,0rcu_preempt19-21ksoftirqd/112:21:251
81760,0rcu_preempt19-21ksoftirqd/111:54:021
81760,0rcu_preempt19-21ksoftirqd/109:44:221
81760,0rcu_preempt19-21ksoftirqd/109:44:221
81750,0rcu_preempt3-21ksoftirqd/010:49:200
81750,0rcu_preempt19-21ksoftirqd/109:23:091
81750,0rcu_preempt19-21ksoftirqd/107:39:021
81740,0rcu_preempt3-21ksoftirqd/012:15:270
81740,0rcu_preempt19-21ksoftirqd/111:14:181
81730,0rcu_preempt3-21ksoftirqd/009:04:130
81720,0rcu_preempt3-21ksoftirqd/008:24:300
81720,0rcu_preempt19-21ksoftirqd/110:34:141
81720,0rcu_preempt19-21ksoftirqd/110:09:301
81710,0rcu_preempt3-21ksoftirqd/012:09:280
81710,0rcu_preempt3-21ksoftirqd/010:59:270
81700,0rcu_preempt3-21ksoftirqd/008:39:140
81690,0rcu_preempt3-21ksoftirqd/008:44:280
81680,0rcu_preempt19-21ksoftirqd/112:24:141
81680,0rcu_preempt19-21ksoftirqd/110:44:151
81670,0rcu_preempt3-21ksoftirqd/011:54:310
81670,0rcu_preempt3-21ksoftirqd/011:54:310
81670,0rcu_preempt3-21ksoftirqd/009:24:280
81670,0rcu_preempt3-21ksoftirqd/008:34:140
81670,0rcu_preempt19-21ksoftirqd/107:24:261
81660,0rcu_preempt19-21ksoftirqd/111:31:381
81650,0rcu_preempt19-21ksoftirqd/108:44:211
81640,0rcu_preempt3-21ksoftirqd/010:11:120
81640,0rcu_preempt19-21ksoftirqd/111:54:281
81640,0rcu_preempt19-21ksoftirqd/111:54:281
81640,0rcu_preempt19-21ksoftirqd/110:39:281
81630,0rcu_preempt3-21ksoftirqd/011:19:210
81620,0rcu_preempt3-21ksoftirqd/011:34:300
81620,0rcu_preempt3-21ksoftirqd/008:49:330
81620,0rcu_preempt19-21ksoftirqd/109:34:211
81610,0rcu_preempt3-21ksoftirqd/010:25:280
81610,0rcu_preempt3-21ksoftirqd/008:14:150
81610,0rcu_preempt19-21ksoftirqd/111:22:221
81610,0rcu_preempt19-21ksoftirqd/107:44:031
36212610,0chrt10050irq/346-484840007:46:430
81600,0rcu_preempt3-21ksoftirqd/011:29:220
81590,0rcu_preempt3-21ksoftirqd/010:33:160
81590,0rcu_preempt3-21ksoftirqd/009:09:290
81590,0rcu_preempt30128-21diskmemload09:49:271
81580,0rcu_preempt32590-21apt-get09:44:120
81580,0rcu_preempt32590-21apt-get09:44:120
81580,0rcu_preempt19-21ksoftirqd/111:34:311
81570,0rcu_preempt3-21ksoftirqd/012:19:190
81570,0rcu_preempt19-21ksoftirqd/109:54:191
81560,0rcu_preempt3-21ksoftirqd/011:09:210
81560,0rcu_preempt19-21ksoftirqd/111:39:471
13250560,0irq/301-480200054-21kswapd009:14:150
81550,0rcu_preempt3-21ksoftirqd/010:39:210
81550,0rcu_preempt19-21ksoftirqd/112:09:241
81550,0rcu_preempt19-21ksoftirqd/109:17:541
81550,0rcu_preempt19-21ksoftirqd/108:59:021
81540,0rcu_preempt3-21ksoftirqd/010:54:160
81530,0rcu_preempt3-21ksoftirqd/010:04:030
81530,0rcu_preempt3-21ksoftirqd/009:57:180
81530,0rcu_preempt3-21ksoftirqd/009:32:190
81530,0rcu_preempt19-21ksoftirqd/110:49:141
10050520,0irq/346-484840054-21kswapd009:59:180
81510,0rcu_preempt3-21ksoftirqd/012:34:110
81510,0rcu_preempt3-21ksoftirqd/011:49:020
81510,0rcu_preempt3-21ksoftirqd/009:39:340
81510,0rcu_preempt3-21ksoftirqd/008:59:200
81510,0rcu_preempt19-21ksoftirqd/107:09:281
2312299513,0cyclictest0-21swapper/008:19:180
81500,0rcu_preempt3-21ksoftirqd/007:04:440
81490,0rcu_preempt19-21ksoftirqd/110:59:211
10050490,0irq/346-48484000-21swapper/011:39:050
81480,0rcu_preempt3-21ksoftirqd/010:44:150
81480,0rcu_preempt3-21ksoftirqd/007:19:130
81480,0rcu_preempt3-21ksoftirqd/007:19:130
81480,0rcu_preempt19-21ksoftirqd/107:54:121
10050480,0irq/346-48484005670-21sshd09:49:210
81470,0rcu_preempt6304-21kworker/0:007:14:130
4350470,0irq/32-4330000025526-21dropbear08:54:160
10050470,0irq/346-484840054-21kswapd011:14:220
10050470,0irq/346-48484000-21swapper/012:06:000
81460,0rcu_preempt3-21ksoftirqd/009:19:240
81460,0rcu_preempt3-21ksoftirqd/008:09:150
81460,0rcu_preempt19-21ksoftirqd/108:24:131
81460,0rcu_preempt19-21ksoftirqd/107:04:121
10050460,0irq/346-48484007275-21ssh12:02:210
81450,0rcu_preempt54-21kswapd011:04:220
10050450,0irq/346-48484006304-21kworker/0:007:39:210
10050450,0irq/346-484840026406-21ping07:24:240
10050440,0irq/346-48484004701-21munin-node0
81430,0rcu_preempt6903-21ping07:59:020
81430,0rcu_preempt19-21ksoftirqd/108:19:261
81420,0rcu_preempt19-21ksoftirqd/108:29:101
10050420,0irq/346-484840023264-21munin-node0
10050420,0irq/346-484840013698-21run-parts08:19:021
81410,0rcu_preempt19-21ksoftirqd/107:29:121
23122994124,0cyclictest26406-21ping07:29:190
81400,0rcu_preempt19-21ksoftirqd/107:19:121
81400,0rcu_preempt19-21ksoftirqd/107:19:121
81390,0rcu_preempt19-21ksoftirqd/108:59:121
81380,0rcu_preempt19-21ksoftirqd/108:09:251
2312299381,0cyclictest6903-21ping08:05:400
81360,0rcu_preempt19-21ksoftirqd/109:04:201
81340,0rcu_preempt19-21ksoftirqd/107:59:281
247202320,0sleep123249-1kworker/1:2H08:49:331
10050300,0irq/346-48484000-21swapper/107:49:131
81290,0rcu_preempt19-21ksoftirqd/108:34:151
10050290,0irq/346-48484002941-21meminfo07:44:261
81280,0rcu_preempt19-21ksoftirqd/107:14:031
81260,0rcu_preempt19-21ksoftirqd/108:39:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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