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2026-03-19 - 06:48

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Thu Mar 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811470,0rcu_preempt19-21ksoftirqd/123:30:341
811430,0rcu_preempt19-21ksoftirqd/122:50:591
811400,0rcu_preempt19-21ksoftirqd/121:09:041
811340,0rcu_preempt19-21ksoftirqd/119:29:191
811320,0rcu_preempt19-21ksoftirqd/122:47:311
811280,0rcu_preempt19-21ksoftirqd/121:39:141
811110,0rcu_preempt21205-21munin-node1
811070,0rcu_preempt19-21ksoftirqd/122:54:071
811060,0rcu_preempt19-21ksoftirqd/122:14:211
81980,0rcu_preempt19-21ksoftirqd/122:27:041
81960,0rcu_preempt19-21ksoftirqd/123:09:151
81950,0rcu_preempt19-21ksoftirqd/123:49:221
81800,0rcu_preempt2468-21kworker/1:222:23:151
81790,0rcu_preempt2468-21kworker/1:221:25:101
81790,0rcu_preempt19-21ksoftirqd/100:31:381
81760,0rcu_preempt54-21kswapd019:49:111
81750,0rcu_preempt19-21ksoftirqd/123:40:561
81740,0rcu_preempt851-21rngd00:04:051
64322730,0chrt9950irq/345-484840023:06:300
10050730,0irq/346-484840054-21kswapd023:42:080
10050730,0irq/346-4848400111rcuc/021:58:290
81720,0rcu_preempt54-21kswapd021:39:130
81710,0rcu_preempt5963-1kworker/1:0H23:06:211
81710,0rcu_preempt54-21kswapd023:27:310
81710,0rcu_preempt19-21ksoftirqd/122:34:251
81690,0rcu_preempt19-21ksoftirqd/121:38:501
81680,0rcu_preempt19-21ksoftirqd/100:20:581
1319699682,0cyclictest17887-21ssh23:18:410
81670,0rcu_preempt3-21ksoftirqd/022:11:510
81660,0rcu_preempt19-21ksoftirqd/123:19:101
81660,0rcu_preempt19-21ksoftirqd/123:03:281
1319699667,0cyclictest851-21rngd23:49:080
81640,0rcu_preempt19-21ksoftirqd/123:38:141
81630,0rcu_preempt19-21ksoftirqd/120:29:221
81630,0rcu_preempt19-21ksoftirqd/120:29:221
1319699637,0cyclictest30164-21aten_rapower_en00:04:060
1319699635,0cyclictest12945-1kworker/0:1H23:47:300
1319699622,0cyclictest217212sleep022:15:550
1319699622,0cyclictest0-21swapper/000:24:130
13196996214,0cyclictest1923-1kworker/0:2H21:59:060
10050620,0irq/346-48484001620-21munin-node1
81610,0rcu_preempt28105-21apt-get19:54:061
81610,0rcu_preempt19-21ksoftirqd/122:05:281
81610,0rcu_preempt19-21ksoftirqd/100:34:191
1319699613,0cyclictest0-21swapper/022:24:160
13196996117,0cyclictest0-21swapper/022:54:170
81600,0rcu_preempt19-21ksoftirqd/100:27:451
1319699606,0cyclictest0-21swapper/022:32:360
1319699602,0cyclictest24118-21ssh21:12:380
1319699595,0cyclictest25663-1kworker/0:1H23:29:540
1319699592,0cyclictest2816-21rm23:03:130
1319699592,0cyclictest18352-21apt-get23:19:070
13196995914,0cyclictest0-21swapper/023:59:090
1319699591,0cyclictest10551-21taskset21:31:390
81580,0rcu_preempt19-21ksoftirqd/121:44:161
1319699589,0cyclictest9089-21runrttasks22:36:110
1319699589,0cyclictest0-21swapper/021:45:150
1319699582,0cyclictest16481-21ping19:19:070
1319699582,0cyclictest0-21swapper/000:35:430
1319699582,0cyclictest0-21swapper/000:31:530
81570,0rcu_preempt19-21ksoftirqd/123:59:021
81570,0rcu_preempt19-21ksoftirqd/123:14:221
81570,0rcu_preempt19-21ksoftirqd/120:54:211
1319699572,0cyclictest8673-21basename20:33:550
1319699572,0cyclictest8673-21basename20:33:550
1319699572,0cyclictest315992chrt21:19:340
1319699572,0cyclictest0-21swapper/023:34:190
1319699572,0cyclictest0-21swapper/021:36:350
1319699572,0cyclictest0-21swapper/020:19:150
13196995715,0cyclictest28479-21runrttasks22:23:240
13196995714,0cyclictest16152-21ssh00:22:400
1319699571,0cyclictest12299-21ssh22:06:270
201852560,0sleep09950irq/345-484840021:08:560
1319699566,0cyclictest0-21swapper/021:49:300
1319699563,0cyclictest0-21swapper/022:41:350
1319699562,0cyclictest0-21swapper/021:26:400
1319699562,0cyclictest0-21swapper/021:15:130
13196995611,0cyclictest0-21swapper/020:04:140
13196995611,0cyclictest0-21swapper/020:04:140
1319699561,0cyclictest21268-21apt22:49:050
81550,0rcu_preempt19-21ksoftirqd/120:08:571
1319699558,0cyclictest20190-21diskmemload22:44:080
1319699556,0cyclictest0-21swapper/019:48:330
1319699552,0cyclictest9195-21grep23:09:170
13196995513,0cyclictest0-21swapper/000:14:440
13196995512,0cyclictest0-21swapper/020:34:150
1319699551,0cyclictest16481-21ping19:29:070
10050550,0irq/346-48484008048-1kworker/1:2H23:45:141
10050550,0irq/346-48484005100-1kworker/1:2H00:12:481
81540,0rcu_preempt19-21ksoftirqd/121:54:171
81540,0rcu_preempt11694-21taskset22:39:111
1319699542,0cyclictest16481-21ping19:34:080
1319699542,0cyclictest0-21swapper/023:57:280
1319699542,0cyclictest0-21swapper/020:24:180
1319699542,0cyclictest0-21swapper/019:59:160
1319699541,0cyclictest604-21php-cgi20:09:080
1319699541,0cyclictest16481-21ping19:28:560
81530,0rcu_preempt19-21ksoftirqd/120:59:071
81530,0rcu_preempt19-21ksoftirqd/120:04:251
81530,0rcu_preempt19-21ksoftirqd/120:04:251
1319699533,0cyclictest0-21swapper/020:58:560
13196995313,0cyclictest13757-21munin-node0
1319699531,0cyclictest23205-21apt-get19:39:060
1319699522,0cyclictest0-21swapper/020:59:120
1319699521,0cyclictest3959-21ssh00:09:330
1319699521,0cyclictest15804-21ls19:14:210
81510,0rcu_preempt8116-21ssh21:29:151
81510,0rcu_preempt3-21ksoftirqd/019:04:140
1319699512,0cyclictest0-21swapper/020:39:190
10050510,0irq/346-484840020190-21diskmemload23:27:061
1319699505,0cyclictest1470-21runrttasks19:49:050
10050500,0irq/346-484840016667-1kworker/1:0H22:12:201
1319699496,0cyclictest3-21ksoftirqd/020:14:230
1319699495,0cyclictest0-21swapper/019:09:090
1319699491,0cyclictest28098-21munin-node0
81480,0rcu_preempt4750-21ssh21:59:081
81480,0rcu_preempt19-21ksoftirqd/121:14:121
81460,0rcu_preempt19-21ksoftirqd/120:03:571
81450,0rcu_preempt19-21ksoftirqd/121:49:191
1319699458,0cyclictest0-21swapper/020:44:140
81430,0rcu_preempt19-21ksoftirqd/121:04:131
81430,0rcu_preempt19-21ksoftirqd/119:08:231
81430,0rcu_preempt10927-21if_eth220:39:121
81420,0rcu_preempt19-21ksoftirqd/121:19:091
81410,0rcu_preempt5767-21diskstats20:24:131
81410,0rcu_preempt19-21ksoftirqd/120:44:051
81410,0rcu_preempt19-21ksoftirqd/100:14:071
81400,0rcu_preempt19-21ksoftirqd/120:19:261
81400,0rcu_preempt19-21ksoftirqd/120:14:271
81400,0rcu_preempt19-21ksoftirqd/119:45:001
81400,0rcu_preempt19-21ksoftirqd/119:39:121
81400,0rcu_preempt19-21ksoftirqd/119:24:251
81400,0rcu_preempt19-21ksoftirqd/119:21:111
81390,0rcu_preempt19-21ksoftirqd/120:49:111
81390,0rcu_preempt19-21ksoftirqd/120:34:171
81390,0rcu_preempt19-21ksoftirqd/119:34:111
81380,0rcu_preempt19-21ksoftirqd/119:14:151
81360,0rcu_preempt19-21ksoftirqd/119:09:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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