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2026-08-03 - 21:39

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 Mon Aug 03, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811460,0rcu_preempt54-21kswapd012:29:121
811370,0rcu_preempt19-21ksoftirqd/110:01:221
811230,0rcu_preempt19-21ksoftirqd/108:04:081
811210,0rcu_preempt19-21ksoftirqd/112:00:461
811200,0rcu_preempt19-21ksoftirqd/112:22:161
811130,0rcu_preempt19-21ksoftirqd/107:24:371
811110,0rcu_preempt19-21ksoftirqd/107:40:191
811100,0rcu_preempt54-21kswapd011:43:531
811090,0rcu_preempt19-21ksoftirqd/109:51:061
811060,0rcu_preempt19-21ksoftirqd/111:49:151
811060,0rcu_preempt19-21ksoftirqd/111:25:211
811040,0rcu_preempt19-21ksoftirqd/111:10:301
811030,0rcu_preempt1034-21avahi-daemon10:42:481
811020,0rcu_preempt836-21rngd09:33:281
811020,0rcu_preempt26978-21runrttasks11:37:101
811000,0rcu_preempt19-21ksoftirqd/110:25:121
81990,0rcu_preempt19-21ksoftirqd/109:13:571
81990,0rcu_preempt19-21ksoftirqd/107:30:231
81980,0rcu_preempt19-21ksoftirqd/110:48:281
81980,0rcu_preempt19-21ksoftirqd/110:32:101
81960,0rcu_preempt19-21ksoftirqd/110:20:281
81950,0rcu_preempt19-21ksoftirqd/110:57:301
81950,0rcu_preempt19-21ksoftirqd/108:20:081
81930,0rcu_preempt19-21ksoftirqd/111:58:281
81930,0rcu_preempt19-21ksoftirqd/110:19:491
81930,0rcu_preempt19-21ksoftirqd/110:14:241
81910,0rcu_preempt19-21ksoftirqd/109:25:301
81900,0rcu_preempt19-21ksoftirqd/109:20:091
81890,0rcu_preempt19-21ksoftirqd/112:13:071
81890,0rcu_preempt19-21ksoftirqd/109:16:151
81890,0rcu_preempt19-21ksoftirqd/108:10:081
81880,0rcu_preempt19-21ksoftirqd/109:46:261
81860,0rcu_preempt19-21ksoftirqd/108:09:451
81840,0rcu_preempt19-21ksoftirqd/107:39:471
81840,0rcu_preempt19-21ksoftirqd/107:39:471
10050830,0irq/346-4848400111rcuc/010:00:260
81820,0rcu_preempt19-21ksoftirqd/112:16:201
81810,0rcu_preempt19-21ksoftirqd/112:35:171
81810,0rcu_preempt19-21ksoftirqd/108:28:301
81800,0rcu_preempt19-21ksoftirqd/111:30:161
81790,0rcu_preempt19-21ksoftirqd/109:35:261
81770,0rcu_preempt19-21ksoftirqd/112:30:091
81770,0rcu_preempt19-21ksoftirqd/112:30:091
81770,0rcu_preempt19-21ksoftirqd/112:09:571
81770,0rcu_preempt19-21ksoftirqd/109:58:181
81770,0rcu_preempt19-21ksoftirqd/108:33:131
81770,0rcu_preempt19-21ksoftirqd/107:19:581
10050770,0irq/346-484840028292-1kworker/0:0H10:35:040
81760,0rcu_preempt19-21ksoftirqd/110:38:501
81750,0rcu_preempt19-21ksoftirqd/111:50:241
10050750,0irq/346-484840026323-1kworker/0:2H09:58:330
81740,0rcu_preempt19-21ksoftirqd/111:20:271
81740,0rcu_preempt19-21ksoftirqd/108:51:421
10050740,0irq/346-484840041ktimersoftd/012:20:370
81730,0rcu_preempt19-21ksoftirqd/110:51:181
81730,0rcu_preempt19-21ksoftirqd/107:25:101
493699732,0cyclictest18936-21ssh09:50:070
81720,0rcu_preempt19-21ksoftirqd/111:18:201
81720,0rcu_preempt19-21ksoftirqd/111:18:201
81720,0rcu_preempt19-21ksoftirqd/111:04:221
81720,0rcu_preempt19-21ksoftirqd/109:40:151
81710,0rcu_preempt19-21ksoftirqd/111:09:541
10050710,0irq/346-484840019469-1kworker/0:1H09:21:290
493699704,0cyclictest0-21swapper/011:10:080
493699692,0cyclictest0-21swapper/009:45:090
81670,0rcu_preempt19-21ksoftirqd/108:45:251
493699667,0cyclictest23404-1kworker/0:0H12:06:510
81650,0rcu_preempt19-21ksoftirqd/110:08:351
493699656,0cyclictest2084-1kworker/0:0H11:46:260
493699652,0cyclictest10599-1kworker/0:3H12:30:070
493699652,0cyclictest10599-1kworker/0:3H12:30:070
81630,0rcu_preempt19-21ksoftirqd/109:00:271
493699636,0cyclictest13604-1kworker/0:0H12:00:220
493699632,0cyclictest0-21swapper/009:12:110
493699631,0cyclictest0-21swapper/010:14:120
81620,0rcu_preempt3-21ksoftirqd/010:20:390
493699627,0cyclictest19469-1kworker/0:1H09:18:580
493699621,0cyclictest19572-1kworker/0:3H11:00:160
81610,0rcu_preempt19-21ksoftirqd/107:50:081
493699615,0cyclictest24759-21apt-get08:10:070
493699613,0cyclictest0-21swapper/009:43:320
493699603,0cyclictest0-21swapper/010:09:050
493699602,0cyclictest25754-21ssh10:30:080
493699593,0cyclictest0-21swapper/009:26:170
493699592,0cyclictest10273-21munin-node0
493699592,0cyclictest0-21swapper/008:09:560
4936995912,0cyclictest13051-21dropbear10:50:110
493699591,0cyclictest32492-21ntpdc09:30:210
10050590,0irq/346-484840014588-1kworker/0:0H09:39:060
493699588,0cyclictest1518350kworker/0:2H11:36:320
493699586,0cyclictest27380-21grep12:10:250
493699583,0cyclictest0-21swapper/008:23:310
493699582,0cyclictest8214-21ping07:20:100
493699582,0cyclictest1445-21runrttasks11:56:370
4936995814,0cyclictest11481-21ssh11:21:020
4936995813,0cyclictest0-21swapper/011:15:240
4936995813,0cyclictest0-21swapper/011:15:240
493699581,0cyclictest25330-21taskset10:29:450
493699581,0cyclictest21457-1kworker/0:1H11:33:240
493699575,0cyclictest0-21swapper/011:08:210
493699573,0cyclictest7553-1kworker/0:0H11:26:570
4936995711,0cyclictest0-21swapper/011:51:420
493699571,0cyclictest31163-21munin-node0
493699562,0cyclictest8214-21ping07:30:090
493699562,0cyclictest16053-21runrttasks07:41:130
493699557,0cyclictest11098-21ssh10:15:070
493699552,0cyclictest3904-21munin-node0
493699552,0cyclictest0-21swapper/011:40:150
493699552,0cyclictest0-21swapper/007:52:280
4936995512,0cyclictest12501-21runrttasks12:29:010
493699551,0cyclictest29237-1kworker/0:3H08:26:510
4936995417,0cyclictest0-21swapper/010:47:090
4936995411,0cyclictest20255-21sh10:57:100
493699532,0cyclictest18941-21interrupts12:35:170
4936995313,0cyclictest21684-21dropbear08:00:120
493699531,0cyclictest8214-21ping07:35:090
493699531,0cyclictest8214-21ping07:35:090
493699523,0cyclictest0-21swapper/008:15:080
493699522,0cyclictest8604-21munin-run08:59:570
493699522,0cyclictest8312-1kworker/0:1H09:00:130
81510,0rcu_preempt3-21ksoftirqd/007:05:140
81510,0rcu_preempt19-21ksoftirqd/108:35:111
493699516,0cyclictest0-21swapper/008:45:110
4936995111,0cyclictest7873-21runrttasks07:16:320
4936995111,0cyclictest0-21swapper/008:37:260
493699511,0cyclictest5645-21ls07:10:160
493699499,0cyclictest6110-21nfs4_client08:50:180
493699493,0cyclictest0-21swapper/008:40:210
493699492,0cyclictest0-21swapper/009:05:210
493699491,0cyclictest209502chrt07:56:060
81480,0rcu_preempt19-21ksoftirqd/108:55:191
81480,0rcu_preempt19-21ksoftirqd/108:15:091
493699489,0cyclictest0-21swapper/008:31:500
493699481,0cyclictest8214-21ping07:45:160
81470,0rcu_preempt19-21ksoftirqd/107:55:181
81440,0rcu_preempt3430-21apt-get07:05:061
81430,0rcu_preempt19-21ksoftirqd/109:05:221
10050420,0irq/346-48484008214-21ping07:46:331
81400,0rcu_preempt19-21ksoftirqd/108:40:221
81360,0rcu_preempt19-21ksoftirqd/107:13:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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