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2026-03-27 - 18:08

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 Fri Mar 27, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811510,0rcu_preempt3-21ksoftirqd/007:39:250
811260,0rcu_preempt19-21ksoftirqd/109:09:051
811220,0rcu_preempt19-21ksoftirqd/107:29:481
811160,0rcu_preempt18075-21dropbear10:59:001
811120,0rcu_preempt3-21ksoftirqd/009:35:560
811110,0rcu_preempt19-21ksoftirqd/112:24:121
811110,0rcu_preempt19-21ksoftirqd/112:14:141
811110,0rcu_preempt19-21ksoftirqd/109:59:121
811070,0rcu_preempt19-21ksoftirqd/109:21:261
811060,0rcu_preempt3-21ksoftirqd/010:24:010
811050,0rcu_preempt3-21ksoftirqd/007:38:200
811050,0rcu_preempt19-21ksoftirqd/109:47:211
811050,0rcu_preempt19-21ksoftirqd/109:47:211
811030,0rcu_preempt3-21ksoftirqd/010:34:030
811030,0rcu_preempt19-21ksoftirqd/108:19:161
811020,0rcu_preempt3-21ksoftirqd/009:14:160
811010,0rcu_preempt19-21ksoftirqd/111:19:071
811010,0rcu_preempt0-21swapper/111:49:121
81990,0rcu_preempt24976-21kworker/0:108:54:140
81980,0rcu_preempt19-21ksoftirqd/111:31:081
81980,0rcu_preempt19-21ksoftirqd/110:24:071
81970,0rcu_preempt19-21ksoftirqd/112:19:141
81970,0rcu_preempt19-21ksoftirqd/110:14:131
81950,0rcu_preempt19-21ksoftirqd/111:24:011
81950,0rcu_preempt19-21ksoftirqd/109:39:061
81940,0rcu_preempt19-21ksoftirqd/107:54:011
81930,0rcu_preempt2351-21ping07:28:110
81930,0rcu_preempt19-21ksoftirqd/110:34:041
81870,0rcu_preempt3-21ksoftirqd/011:24:010
81870,0rcu_preempt2351-21ping07:45:060
81870,0rcu_preempt19-21ksoftirqd/111:48:491
81870,0rcu_preempt19-21ksoftirqd/107:14:011
81870,0rcu_preempt1470-21runrttasks10:30:261
81870,0rcu_preempt1049-21avahi-daemon11:04:011
81860,0rcu_preempt3-21ksoftirqd/010:59:000
81860,0rcu_preempt3-21ksoftirqd/009:59:120
81860,0rcu_preempt19-21ksoftirqd/110:51:331
81850,0rcu_preempt3-21ksoftirqd/010:49:010
81840,0rcu_preempt3-21ksoftirqd/008:59:140
81840,0rcu_preempt3188-21ntpq07:19:180
81830,0rcu_preempt19-21ksoftirqd/110:54:171
81820,0rcu_preempt24877-21kworker/0:212:29:040
81820,0rcu_preempt19-21ksoftirqd/112:05:561
81820,0rcu_preempt19-21ksoftirqd/109:27:451
81820,0rcu_preempt19-21ksoftirqd/108:34:061
81810,0rcu_preempt3-21ksoftirqd/010:54:080
81800,0rcu_preempt3-21ksoftirqd/012:04:040
81800,0rcu_preempt3-21ksoftirqd/009:44:030
81800,0rcu_preempt3-21ksoftirqd/009:44:030
81800,0rcu_preempt3-21ksoftirqd/009:12:470
81800,0rcu_preempt19-21ksoftirqd/111:39:111
81800,0rcu_preempt19-21ksoftirqd/109:14:021
81790,0rcu_preempt3-21ksoftirqd/010:14:180
81790,0rcu_preempt19-21ksoftirqd/111:38:481
81790,0rcu_preempt19-21ksoftirqd/110:19:321
81790,0rcu_preempt19-21ksoftirqd/109:49:071
81790,0rcu_preempt19-21ksoftirqd/108:38:591
81780,0rcu_preempt19-21ksoftirqd/111:16:531
81780,0rcu_preempt19-21ksoftirqd/111:09:141
81780,0rcu_preempt19-21ksoftirqd/109:31:411
81780,0rcu_preempt19-21ksoftirqd/108:44:141
81770,0rcu_preempt3-21ksoftirqd/012:23:340
81770,0rcu_preempt3-21ksoftirqd/010:04:150
81770,0rcu_preempt19-21ksoftirqd/112:02:111
81770,0rcu_preempt19-21ksoftirqd/110:39:121
81760,0rcu_preempt3-21ksoftirqd/012:01:100
81760,0rcu_preempt3-21ksoftirqd/007:59:170
81750,0rcu_preempt3-21ksoftirqd/008:09:040
81750,0rcu_preempt3-21ksoftirqd/007:29:040
81750,0rcu_preempt19-21ksoftirqd/112:33:481
81750,0rcu_preempt19-21ksoftirqd/111:54:071
81750,0rcu_preempt19-21ksoftirqd/107:24:211
81740,0rcu_preempt3-21ksoftirqd/010:48:430
81740,0rcu_preempt3-21ksoftirqd/009:49:040
81740,0rcu_preempt19-21ksoftirqd/110:04:051
81730,0rcu_preempt19-21ksoftirqd/112:30:001
81730,0rcu_preempt19-21ksoftirqd/108:49:151
81720,0rcu_preempt3-21ksoftirqd/011:41:170
81720,0rcu_preempt3-21ksoftirqd/008:39:140
81710,0rcu_preempt3-21ksoftirqd/011:21:030
81710,0rcu_preempt3-21ksoftirqd/007:14:120
81710,0rcu_preempt21364-21kworker/0:112:34:140
81710,0rcu_preempt19-21ksoftirqd/112:12:101
81700,0rcu_preempt3-21ksoftirqd/010:23:210
81700,0rcu_preempt3-21ksoftirqd/008:19:030
81690,0rcu_preempt3-21ksoftirqd/011:31:550
81690,0rcu_preempt3-21ksoftirqd/010:09:550
81690,0rcu_preempt3-21ksoftirqd/009:24:070
81690,0rcu_preempt3-21ksoftirqd/007:49:140
81690,0rcu_preempt0-21swapper/011:13:220
81680,0rcu_preempt3-21ksoftirqd/011:04:110
81680,0rcu_preempt3-21ksoftirqd/009:54:120
81680,0rcu_preempt3-21ksoftirqd/009:29:150
81680,0rcu_preempt3-21ksoftirqd/007:54:000
81670,0rcu_preempt3-21ksoftirqd/012:24:010
81670,0rcu_preempt3-21ksoftirqd/011:44:050
81670,0rcu_preempt3-21ksoftirqd/008:04:030
81670,0rcu_preempt19-21ksoftirqd/108:59:031
81660,0rcu_preempt3-21ksoftirqd/011:35:030
81660,0rcu_preempt19-21ksoftirqd/108:04:041
81660,0rcu_preempt19-21ksoftirqd/107:09:071
81650,0rcu_preempt3-21ksoftirqd/011:49:030
81650,0rcu_preempt3-21ksoftirqd/009:22:020
81650,0rcu_preempt3-21ksoftirqd/008:49:060
81650,0rcu_preempt19-21ksoftirqd/109:54:091
81650,0rcu_preempt19-21ksoftirqd/109:08:201
81650,0rcu_preempt19-21ksoftirqd/108:14:101
81650,0rcu_preempt19-21ksoftirqd/108:09:171
81640,0rcu_preempt3-21ksoftirqd/010:39:380
81640,0rcu_preempt19-21ksoftirqd/110:44:121
81630,0rcu_preempt3-21ksoftirqd/011:57:060
81630,0rcu_preempt19-21ksoftirqd/109:34:501
81630,0rcu_preempt19-21ksoftirqd/107:49:081
9950620,0irq/345-4848400851-21rngd11:14:490
81610,0rcu_preempt19-21ksoftirqd/108:29:061
81610,0rcu_preempt16075-21kworker/0:010:30:460
81600,0rcu_preempt3-21ksoftirqd/007:09:130
81600,0rcu_preempt19-21ksoftirqd/110:09:121
81590,0rcu_preempt3-21ksoftirqd/012:14:290
81590,0rcu_preempt3-21ksoftirqd/009:04:080
81590,0rcu_preempt19-21ksoftirqd/107:59:161
81580,0rcu_preempt3-21ksoftirqd/012:12:500
81580,0rcu_preempt18477-21kworker/0:209:39:400
81570,0rcu_preempt3-21ksoftirqd/008:29:140
81550,0rcu_preempt20761-21dropbear08:14:030
81550,0rcu_preempt19-21ksoftirqd/108:54:041
81550,0rcu_preempt19-21ksoftirqd/108:24:161
81540,0rcu_preempt15248-21ping08:24:050
81500,0rcu_preempt3-21ksoftirqd/008:34:070
81480,0rcu_preempt19-21ksoftirqd/107:40:561
81470,0rcu_preempt3-21ksoftirqd/008:44:110
81450,0rcu_preempt3-21ksoftirqd/007:04:020
81430,0rcu_preempt19-21ksoftirqd/107:19:251
81400,0rcu_preempt19-21ksoftirqd/107:08:141
81390,0rcu_preempt19-21ksoftirqd/107:33:501
81380,0rcu_preempt2351-21ping07:44:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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