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2026-05-09 - 18:29

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 Sat May 09, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811140,0rcu_preempt19-21ksoftirqd/111:50:201
811100,0rcu_preempt19-21ksoftirqd/112:03:181
811100,0rcu_preempt19-21ksoftirqd/110:03:291
811070,0rcu_preempt19-21ksoftirqd/109:33:551
811050,0rcu_preempt19-21ksoftirqd/109:55:191
811040,0rcu_preempt19-21ksoftirqd/111:35:591
811040,0rcu_preempt19-21ksoftirqd/109:14:141
811000,0rcu_preempt19-21ksoftirqd/111:42:591
81980,0rcu_preempt54-21kswapd011:59:021
81970,0rcu_preempt19-21ksoftirqd/108:03:381
81960,0rcu_preempt19-21ksoftirqd/110:38:261
81950,0rcu_preempt54-21kswapd009:10:351
81950,0rcu_preempt19-21ksoftirqd/110:14:171
81940,0rcu_preempt54-21kswapd009:20:231
81930,0rcu_preempt0-21swapper/112:14:521
81920,0rcu_preempt19-21ksoftirqd/108:08:171
81900,0rcu_preempt3670-21kworker/1:310:26:431
81880,0rcu_preempt54-21kswapd009:58:151
81880,0rcu_preempt19-21ksoftirqd/111:21:511
81860,0rcu_preempt19-21ksoftirqd/110:48:031
81850,0rcu_preempt19-21ksoftirqd/110:10:161
81830,0rcu_preempt19-21ksoftirqd/110:33:381
81830,0rcu_preempt19-21ksoftirqd/108:38:291
81820,0rcu_preempt19-21ksoftirqd/112:28:361
81810,0rcu_preempt19-21ksoftirqd/112:36:591
81810,0rcu_preempt19-21ksoftirqd/110:29:261
81800,0rcu_preempt3670-21kworker/1:311:15:231
81800,0rcu_preempt3670-21kworker/1:311:15:231
81800,0rcu_preempt19-21ksoftirqd/111:29:531
81760,0rcu_preempt19-21ksoftirqd/110:19:501
81760,0rcu_preempt15635-21sendmail-mta11:28:080
81740,0rcu_preempt19-21ksoftirqd/109:43:511
81740,0rcu_preempt19-21ksoftirqd/109:24:101
81730,0rcu_preempt19-21ksoftirqd/111:10:551
81720,0rcu_preempt19-21ksoftirqd/111:27:271
81720,0rcu_preempt19-21ksoftirqd/110:51:051
81710,0rcu_preempt3-21ksoftirqd/009:43:400
81690,0rcu_preempt19-21ksoftirqd/107:18:201
81660,0rcu_preempt19-21ksoftirqd/112:09:151
81660,0rcu_preempt19-21ksoftirqd/110:57:231
81650,0rcu_preempt19-21ksoftirqd/107:38:441
2074699651,0cyclictest5256-21awk10:23:270
81640,0rcu_preempt19-21ksoftirqd/111:44:191
81640,0rcu_preempt19-21ksoftirqd/109:40:571
2074699648,0cyclictest270262chrt09:39:180
81630,0rcu_preempt19-21ksoftirqd/109:52:271
2074699632,0cyclictest0-21swapper/010:20:230
81620,0rcu_preempt19-21ksoftirqd/109:28:261
2074699623,0cyclictest0-21swapper/009:28:250
2074699621,0cyclictest8747-1kworker/0:0H12:11:040
2074699612,0cyclictest28959-21seq11:19:410
2074699612,0cyclictest0-21swapper/011:49:170
2074699612,0cyclictest0-21swapper/009:23:140
2074699611,0cyclictest31235-1kworker/0:3H11:57:330
81600,0rcu_preempt19-21ksoftirqd/112:23:091
2074699602,0cyclictest0-21swapper/012:03:240
2074699601,0cyclictest31193-21ssh12:28:180
81590,0rcu_preempt19-21ksoftirqd/110:59:321
2074699592,0cyclictest22484-21ssh10:08:210
2074699592,0cyclictest0-21swapper/011:45:220
2074699592,0cyclictest0-21swapper/011:38:340
2074699591,0cyclictest3071-21cron07:53:060
2074699591,0cyclictest0-21swapper/010:52:430
81580,0rcu_preempt19-21ksoftirqd/111:57:211
2074699583,0cyclictest5466-1kworker/0:1H09:54:220
2074699582,0cyclictest0-21swapper/010:56:550
2074699582,0cyclictest0-21swapper/009:09:270
2074699581,0cyclictest23744-21ssh10:42:170
2074699577,0cyclictest0-21swapper/011:10:300
2074699573,0cyclictest0-21swapper/012:19:430
2074699573,0cyclictest0-21swapper/011:37:160
2074699572,0cyclictest0-21swapper/007:58:260
20746995718,0cyclictest0-21swapper/012:02:430
2074699571,0cyclictest15252-21munin-node0
81560,0rcu_preempt19-21ksoftirqd/107:48:301
2074699562,0cyclictest32556-21df_abs07:43:240
2074699562,0cyclictest29498-21ssh12:26:160
2074699562,0cyclictest0-21swapper/011:25:480
2074699562,0cyclictest0-21swapper/009:34:420
2074699561,0cyclictest5199-21sh09:18:060
2074699561,0cyclictest24624-21munin-node0
2074699561,0cyclictest14588-1kworker/0:1H10:03:180
81550,0rcu_preempt19-21ksoftirqd/111:03:181
2074699553,0cyclictest0-21swapper/009:18:190
2074699552,0cyclictest4221-21taskset09:48:550
2074699551,0cyclictest27669-21dropbear07:28:270
2074699551,0cyclictest21069-21sh12:18:070
2074699551,0cyclictest14739-21apt-get10:33:190
81540,0rcu_preempt21324-21ssh12:18:151
81540,0rcu_preempt19-21ksoftirqd/108:23:331
81540,0rcu_preempt19-21ksoftirqd/108:18:281
2074699549,0cyclictest6838-21awk08:03:280
2074699548,0cyclictest14199-1kworker/0:0H11:04:460
2074699542,0cyclictest29216-21runrttasks07:33:220
2074699542,0cyclictest25320-21runrttasks07:19:220
2074699542,0cyclictest22852-21ps11:13:340
2074699542,0cyclictest22852-21ps11:13:340
2074699542,0cyclictest0-21swapper/010:13:220
2074699542,0cyclictest0-21swapper/008:23:190
92632530,0chrt10050irq/346-484840008:09:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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