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2026-04-20 - 02:06

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 Sun Apr 19, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811210,0rcu_preempt5598-1kworker/1:0H10:42:141
811210,0rcu_preempt19-21ksoftirqd/110:38:061
811190,0rcu_preempt19-21ksoftirqd/109:23:531
811050,0rcu_preempt23808-21ssh09:14:271
811050,0rcu_preempt19-21ksoftirqd/111:16:491
81980,0rcu_preempt19-21ksoftirqd/110:22:341
81970,0rcu_preempt19-21ksoftirqd/111:03:441
81960,0rcu_preempt19-21ksoftirqd/112:33:441
81960,0rcu_preempt19-21ksoftirqd/112:23:551
81950,0rcu_preempt54-21kswapd011:47:131
81950,0rcu_preempt54-21kswapd011:47:131
81940,0rcu_preempt3556-21ntp_states11:38:511
81920,0rcu_preempt19-21ksoftirqd/110:43:531
81920,0rcu_preempt19-21ksoftirqd/110:43:531
81910,0rcu_preempt19-21ksoftirqd/112:13:301
81910,0rcu_preempt19-21ksoftirqd/110:03:211
81910,0rcu_preempt19-21ksoftirqd/109:44:081
81900,0rcu_preempt54-21kswapd009:53:451
81900,0rcu_preempt3-21ksoftirqd/007:38:570
81900,0rcu_preempt19-21ksoftirqd/111:52:411
81890,0rcu_preempt19-21ksoftirqd/110:14:211
81880,0rcu_preempt19-21ksoftirqd/111:58:351
81880,0rcu_preempt19-21ksoftirqd/110:56:231
81870,0rcu_preempt54-21kswapd010:03:391
81870,0rcu_preempt19-21ksoftirqd/109:19:151
81850,0rcu_preempt30784-21ssh10:28:261
81850,0rcu_preempt19-21ksoftirqd/112:23:161
81840,0rcu_preempt54-21kswapd009:38:471
81840,0rcu_preempt19-21ksoftirqd/112:12:511
81840,0rcu_preempt19-21ksoftirqd/111:00:121
81830,0rcu_preempt851-21rngd11:38:101
81830,0rcu_preempt3-21ksoftirqd/010:47:200
81830,0rcu_preempt3-21ksoftirqd/010:47:200
81830,0rcu_preempt19-21ksoftirqd/109:37:571
81780,0rcu_preempt19-21ksoftirqd/112:08:191
81780,0rcu_preempt19-21ksoftirqd/111:53:421
81770,0rcu_preempt19-21ksoftirqd/112:30:381
81760,0rcu_preempt851-21rngd10:10:401
81750,0rcu_preempt3-21ksoftirqd/010:33:500
81740,0rcu_preempt19-21ksoftirqd/111:32:511
81740,0rcu_preempt19-21ksoftirqd/109:11:191
81730,0rcu_preempt19-21ksoftirqd/111:19:031
81730,0rcu_preempt19-21ksoftirqd/111:08:431
81730,0rcu_preempt19-21ksoftirqd/107:28:461
81720,0rcu_preempt19-21ksoftirqd/109:02:261
81720,0rcu_preempt19-21ksoftirqd/109:02:261
81710,0rcu_preempt3-21ksoftirqd/011:16:190
81690,0rcu_preempt19-21ksoftirqd/110:28:361
81670,0rcu_preempt3-21ksoftirqd/010:13:390
81660,0rcu_preempt26046-21ping08:09:441
81660,0rcu_preempt26046-21ping08:02:491
81660,0rcu_preempt26046-21ping08:02:491
81650,0rcu_preempt3-21ksoftirqd/010:28:400
81650,0rcu_preempt26046-21ping08:21:291
998799645,0cyclictest0-21swapper/010:10:280
81640,0rcu_preempt851-21rngd11:25:291
81640,0rcu_preempt0-21swapper/110:53:191
998799632,0cyclictest24989-21munin-node0
998799629,0cyclictest116022sleep009:35:120
998799621,0cyclictest0-21swapper/009:30:350
81620,0rcu_preempt19-21ksoftirqd/109:30:171
998799612,0cyclictest18736-21seq09:43:060
998799602,0cyclictest5939-21fschecks_time11:08:430
998799602,0cyclictest27765-21meminfo09:18:470
9987996011,0cyclictest20423-21apt-get11:23:380
998799601,0cyclictest0-21swapper/010:41:230
9987996010,0cyclictest18772-21ssh10:48:450
81600,0rcu_preempt3-21ksoftirqd/011:00:000
81600,0rcu_preempt19-21ksoftirqd/108:03:431
998799592,0cyclictest30116-21ssh11:33:270
998799592,0cyclictest23872-21ssh09:14:320
998799592,0cyclictest0-21swapper/011:31:010
9987995915,0cyclictest9775-21munin-node0
81590,0rcu_preempt19-21ksoftirqd/109:03:381
998799589,0cyclictest21813-21ssh10:18:480
998799584,0cyclictest0-21swapper/009:52:030
998799583,0cyclictest0-21swapper/008:21:540
998799582,0cyclictest9303-21rm11:44:290
998799582,0cyclictest9303-21rm11:44:290
998799582,0cyclictest0-21swapper/011:22:140
998799582,0cyclictest0-21swapper/010:02:190
998799581,0cyclictest23246-21munin-node0
81580,0rcu_preempt0-21swapper/108:50:061
998799578,0cyclictest32558-21munin-node0
998799572,0cyclictest24127-21rm11:59:340
998799572,0cyclictest21051-21ssh11:57:020
998799572,0cyclictest0-21swapper/012:07:310
998799572,0cyclictest0-21swapper/007:18:430
998799571,0cyclictest4872-1kworker/0:2H11:40:090
998799571,0cyclictest27208-21ls10:23:550
998799571,0cyclictest1470-21runrttasks12:13:440
81570,0rcu_preempt3-21ksoftirqd/007:03:430
998799565,0cyclictest14440-21runrttasks11:49:470
998799562,0cyclictest1572-21munin-node0
998799562,0cyclictest13269-21ping07:28:370
9987995613,0cyclictest19644-21ssh09:10:270
9987995612,0cyclictest12401-21munin-node0
998799561,0cyclictest15334-21awk09:03:260
998799561,0cyclictest15334-21awk09:03:260
81560,0rcu_preempt6557-21kworker/1:208:17:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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