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2025-08-27 - 09:27

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 376 highest latencies:
System rackaslot5s.osadl.org (updated Wed Aug 27, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt19-21ksoftirqd/121:25:501
81980,0rcu_preempt19-21ksoftirqd/123:36:201
81970,0rcu_preempt4157-21seq23:22:011
81890,0rcu_preempt19-21ksoftirqd/121:41:281
81850,0rcu_preempt19-21ksoftirqd/121:26:121
81840,0rcu_preempt27356-21ping20:01:281
81840,0rcu_preempt19-21ksoftirqd/119:41:291
81810,0rcu_preempt19-21ksoftirqd/120:46:561
81790,0rcu_preempt0-21swapper/123:16:181
81770,0rcu_preempt2056-21meminfo22:41:231
81740,0rcu_preempt19-21ksoftirqd/120:01:011
81730,0rcu_preempt19-21ksoftirqd/122:56:171
81720,0rcu_preempt19-21ksoftirqd/123:51:431
81720,0rcu_preempt19-21ksoftirqd/123:31:011
81700,0rcu_preempt19-21ksoftirqd/121:15:591
1109799708,0cyclictest29322-1kworker/0:0H22:36:280
1109799702,0cyclictest10568-21munin-node0
81690,0rcu_preempt19-21ksoftirqd/121:56:161
81680,0rcu_preempt19-21ksoftirqd/119:40:551
81670,0rcu_preempt19-21ksoftirqd/123:43:351
81670,0rcu_preempt19-21ksoftirqd/121:38:471
81670,0rcu_preempt19-21ksoftirqd/121:08:471
1109799672,0cyclictest23218-21ssh00:27:470
1109799671,0cyclictest23492-1kworker/0:1H00:31:300
1109799671,0cyclictest12585-21ssh21:36:350
81660,0rcu_preempt19-21ksoftirqd/123:02:291
81660,0rcu_preempt19-21ksoftirqd/121:51:081
81660,0rcu_preempt19-21ksoftirqd/121:34:381
81660,0rcu_preempt19-21ksoftirqd/100:29:301
81660,0rcu_preempt11095-21cyclictest19:29:471
81650,0rcu_preempt19-21ksoftirqd/122:53:071
81650,0rcu_preempt19-21ksoftirqd/122:14:341
81650,0rcu_preempt19-21ksoftirqd/100:14:321
1109799652,0cyclictest0-21swapper/023:29:200
81640,0rcu_preempt19-21ksoftirqd/100:16:251
1109799641,0cyclictest4314-21basename22:06:130
1109799641,0cyclictest4314-21basename22:06:130
81630,0rcu_preempt19-21ksoftirqd/122:33:231
81630,0rcu_preempt19-21ksoftirqd/122:03:401
1109799632,0cyclictest26297-21ssh23:10:580
11097996211,0cyclictest17958-21dropbear00:21:180
1109799621,0cyclictest7741-1kworker/0:3H22:51:260
81610,0rcu_preempt19-21ksoftirqd/123:31:001
81610,0rcu_preempt19-21ksoftirqd/122:10:271
81610,0rcu_preempt19-21ksoftirqd/122:10:271
1109799614,0cyclictest10050irq/346-484840021:16:120
1109799613,0cyclictest0-21swapper/023:02:440
1109799612,0cyclictest0-21swapper/022:56:220
1109799612,0cyclictest0-21swapper/021:51:450
1109799602,0cyclictest31312-21df21:21:170
1109799602,0cyclictest21734-21ssh22:26:240
1109799602,0cyclictest0-21swapper/021:11:150
1109799602,0cyclictest0-21swapper/019:56:110
1109799602,0cyclictest0-21swapper/019:11:210
1109799601,0cyclictest9078-21ntp_kernel_err20:36:230
1109799601,0cyclictest5594-21apt-get22:46:130
1109799592,0cyclictest8486-21ssh22:11:130
1109799592,0cyclictest19865-21ssh23:41:210
1109799592,0cyclictest0-21swapper/021:49:190
1109799592,0cyclictest0-21swapper/000:06:400
1109799591,0cyclictest329-21php-cgi22:01:200
1109799591,0cyclictest18558-21ssh21:06:140
81580,0rcu_preempt19-21ksoftirqd/100:21:211
1109799584,0cyclictest0-21swapper/021:43:100
1109799582,0cyclictest0-21swapper/023:17:280
1109799582,0cyclictest0-21swapper/000:20:410
1109799581,0cyclictest54-21kswapd023:56:160
1109799581,0cyclictest3716-21ntp_states21:26:250
1109799581,0cyclictest16114-21memory23:36:290
81570,0rcu_preempt19-21ksoftirqd/100:31:441
1109799578,0cyclictest10050irq/346-484840023:46:480
1109799572,0cyclictest0-21swapper/019:16:300
1109799571,0cyclictest28259-21munin-node0
1109799571,0cyclictest2379-1kworker/0:1H23:21:300
1109799571,0cyclictest18150-21diskmemload22:24:040
1109799571,0cyclictest16860-21df_inode21:01:170
1109799571,0cyclictest14383-21ping19:26:000
1109799571,0cyclictest13464-21diskmemload22:16:280
1109799571,0cyclictest13464-21diskmemload22:16:280
1109799571,0cyclictest11729-21apt-get20:46:130
1109799562,0cyclictest1536-21ssh22:41:150
1109799561,0cyclictest14383-21ping19:31:140
1109799561,0cyclictest0-21swapper/021:31:310
81550,0rcu_preempt19-21ksoftirqd/122:46:131
81550,0rcu_preempt19-21ksoftirqd/121:48:421
1109799558,0cyclictest9185-1kworker/0:1H23:31:050
1109799554,0cyclictest11415-21sh19:06:140
1109799552,0cyclictest28944-21ssh23:13:210
1109799552,0cyclictest27742-21ssh22:33:250
1109799551,0cyclictest4633-21ssh00:02:110
1109799551,0cyclictest30396-21ssh23:53:400
81540,0rcu_preempt19-21ksoftirqd/121:16:221
1109799542,0cyclictest0-21swapper/020:31:300
1109799541,0cyclictest32611-21apt-get20:11:150
1109799541,0cyclictest30973-21apt-get20:06:150
1109799541,0cyclictest15684-21awk20:56:260
81530,0rcu_preempt19-21ksoftirqd/123:06:161
81530,0rcu_preempt19-21ksoftirqd/122:36:181
81530,0rcu_preempt19-21ksoftirqd/100:06:311
1109799532,0cyclictest5777-21munin-node0
1109799532,0cyclictest29333-21apt-get20:01:150
1109799532,0cyclictest0-21swapper/020:16:130
1109799532,0cyclictest0-21swapper/019:26:170
1109799531,0cyclictest4674-21taskset20:22:480
81520,0rcu_preempt19-21ksoftirqd/120:51:201
81520,0rcu_preempt19-21ksoftirqd/119:46:201
1109799522,0cyclictest24576-21dropbear19:46:150
1109799522,0cyclictest14383-21ping19:41:160
10050520,0irq/346-484840054-21kswapd022:27:281
81510,0rcu_preempt19-21ksoftirqd/120:21:321
1109799512,0cyclictest20620-1kworker/0:1H19:36:360
1109799511,0cyclictest26035-21apt-get19:51:130
81490,0rcu_preempt19-21ksoftirqd/120:36:211
81490,0rcu_preempt19-21ksoftirqd/120:06:161
81490,0rcu_preempt13395-21ssh22:16:261
81490,0rcu_preempt13395-21ssh22:16:261
1109799491,0cyclictest13366-21apt-get20:51:120
1109799491,0cyclictest10087-21apt-get20:41:160
1109799482,0cyclictest0-21swapper/019:06:000
81470,0rcu_preempt27356-21ping20:16:151
81470,0rcu_preempt0-21swapper/120:41:151
81460,0rcu_preempt19-21ksoftirqd/120:11:151
81450,0rcu_preempt19-21ksoftirqd/123:56:291
81450,0rcu_preempt0-21swapper/123:11:291
81440,0rcu_preempt966-21lighttpd19:01:251
81440,0rcu_preempt19-21ksoftirqd/121:01:171
81430,0rcu_preempt19-21ksoftirqd/123:46:191
10050430,0irq/346-48484000-21swapper/120:56:191
81420,0rcu_preempt19-21ksoftirqd/122:21:161
81420,0rcu_preempt19-21ksoftirqd/119:06:221
81420,0rcu_preempt0-21swapper/119:11:181
81410,0rcu_preempt5663-21ssh00:04:251
81400,0rcu_preempt19-21ksoftirqd/119:51:561
9950390,0irq/345-4848400753-21rngd19:16:341
81390,0rcu_preempt5714-21memory20:26:221
10050390,0irq/346-48484000-21swapper/119:23:041
81370,0rcu_preempt0-21swapper/120:31:321
10050350,0irq/346-48484000-21swapper/119:31:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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