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2026-08-10 - 12:20

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Mon Aug 10, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811080,0rcu_preempt19-21ksoftirqd/122:15:191
81980,0rcu_preempt19-21ksoftirqd/123:25:091
81970,0rcu_preempt19-21ksoftirqd/100:15:211
81850,0rcu_preempt19-21ksoftirqd/121:52:121
81850,0rcu_preempt19-21ksoftirqd/120:00:501
81810,0rcu_preempt19-21ksoftirqd/123:35:021
81810,0rcu_preempt19-21ksoftirqd/123:35:021
81810,0rcu_preempt19-21ksoftirqd/122:11:381
81810,0rcu_preempt19-21ksoftirqd/120:09:051
81810,0rcu_preempt19-21ksoftirqd/100:06:051
81800,0rcu_preempt19-21ksoftirqd/122:00:031
81800,0rcu_preempt19-21ksoftirqd/120:27:471
81790,0rcu_preempt19-21ksoftirqd/121:39:191
81790,0rcu_preempt19-21ksoftirqd/121:39:191
81740,0rcu_preempt19-21ksoftirqd/121:13:511
81740,0rcu_preempt19-21ksoftirqd/121:13:511
81740,0rcu_preempt19-21ksoftirqd/100:25:211
10050720,0irq/346-484840026125-1kworker/0:0H23:47:210
81710,0rcu_preempt19-21ksoftirqd/122:54:011
10050710,0irq/346-48484006490-1kworker/0:3H21:38:020
10050710,0irq/346-48484006490-1kworker/0:3H21:38:020
81700,0rcu_preempt19-21ksoftirqd/123:43:101
81700,0rcu_preempt19-21ksoftirqd/120:15:171
81700,0rcu_preempt19-21ksoftirqd/120:15:171
81690,0rcu_preempt19-21ksoftirqd/123:02:271
81690,0rcu_preempt19-21ksoftirqd/122:44:521
81680,0rcu_preempt19-21ksoftirqd/123:52:101
81680,0rcu_preempt19-21ksoftirqd/123:05:091
81680,0rcu_preempt19-21ksoftirqd/122:21:251
81680,0rcu_preempt19-21ksoftirqd/121:29:221
81680,0rcu_preempt19-21ksoftirqd/121:18:211
81680,0rcu_preempt19-21ksoftirqd/119:39:511
10050680,0irq/346-484840032026-1kworker/0:2H00:20:490
81670,0rcu_preempt19-21ksoftirqd/123:34:101
81670,0rcu_preempt19-21ksoftirqd/121:49:001
4630996730,0cyclictest25179-21taskset22:30:000
81660,0rcu_preempt19-21ksoftirqd/123:55:101
81660,0rcu_preempt19-21ksoftirqd/123:55:101
81660,0rcu_preempt19-21ksoftirqd/123:46:421
81650,0rcu_preempt19-21ksoftirqd/122:55:131
81650,0rcu_preempt19-21ksoftirqd/100:11:111
81640,0rcu_preempt19-21ksoftirqd/123:20:191
81640,0rcu_preempt19-21ksoftirqd/122:44:141
81630,0rcu_preempt19-21ksoftirqd/123:12:161
81630,0rcu_preempt19-21ksoftirqd/122:32:081
81630,0rcu_preempt19-21ksoftirqd/120:39:501
81630,0rcu_preempt19-21ksoftirqd/100:31:581
4630996326,0cyclictest11326-1kworker/0:0H21:42:140
4630996322,0cyclictest19170-1kworker/0:0H00:37:370
4630996321,0cyclictest16393-1kworker/0:2H23:31:160
81620,0rcu_preempt3-21ksoftirqd/023:40:110
4630996221,0cyclictest32523-1kworker/0:2H22:41:240
81610,0rcu_preempt19-21ksoftirqd/121:55:101
81610,0rcu_preempt19-21ksoftirqd/121:34:401
4630996129,0cyclictest21719-21apt-get21:20:010
4630996129,0cyclictest21719-21apt-get21:20:010
4630996124,0cyclictest32523-1kworker/0:2H22:37:150
4630996123,0cyclictest9042-21taskset22:13:080
4630996122,0cyclictest25918-1kworker/0:3H21:58:070
4630996117,0cyclictest9887-1kworker/0:0H22:50:320
81600,0rcu_preempt19-21ksoftirqd/123:15:161
4630996026,0cyclictest19206-21ssh00:03:420
4630996016,0cyclictest26125-1kworker/0:0H23:38:490
4630996016,0cyclictest26125-1kworker/0:0H23:38:490
81590,0rcu_preempt19-21ksoftirqd/122:26:101
81590,0rcu_preempt19-21ksoftirqd/100:20:011
4630995925,0cyclictest23424-21ssh00:07:490
4630995924,0cyclictest22249-1kworker/0:2H00:10:420
4630995923,0cyclictest0-21swapper/021:15:040
4630995917,0cyclictest23738-1kworker/0:2H23:04:470
4630995917,0cyclictest0-21swapper/023:58:300
4630995917,0cyclictest0-21swapper/023:58:300
81580,0rcu_preempt19-21ksoftirqd/122:36:561
4630995826,0cyclictest17875-1kworker/0:3H22:25:010
4630995823,0cyclictest0-21swapper/022:20:090
4630995822,0cyclictest6671-1kworker/0:2H23:17:200
4630995822,0cyclictest21045-1kworker/0:1H21:52:130
4630995822,0cyclictest16200-1kworker/0:2H21:49:210
4630995821,0cyclictest32026-1kworker/0:2H00:16:220
81570,0rcu_preempt3-21ksoftirqd/023:05:070
81570,0rcu_preempt19-21ksoftirqd/121:41:051
81570,0rcu_preempt19-21ksoftirqd/121:20:091
81570,0rcu_preempt19-21ksoftirqd/121:20:091
4630995727,0cyclictest0-21swapper/022:17:110
4630995724,0cyclictest16926-21idleruntime-cro00:34:490
4630995721,0cyclictest11269-1kworker/0:1H21:10:450
4630995721,0cyclictest11269-1kworker/0:1H21:10:450
81560,0rcu_preempt2745-1kworker/1:0H00:01:211
4630995626,0cyclictest13998-21munin-node0
4630995622,0cyclictest7625-1kworker/0:2H23:52:580
4630995622,0cyclictest0-21swapper/000:28:280
4630995621,0cyclictest29017-1kworker/0:0H21:28:010
4630995526,0cyclictest1455-21munin-node0
4630995526,0cyclictest1455-21munin-node0
4630995525,0cyclictest31591-21munin-node0
4630995523,0cyclictest0-21swapper/022:49:500
4630995521,0cyclictest11541-1kworker/0:1H23:22:220
81540,0rcu_preempt19-21ksoftirqd/120:45:021
81540,0rcu_preempt19-21ksoftirqd/119:39:501
4630995423,0cyclictest21037-21latency_hist19:59:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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