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2026-05-12 - 21:54

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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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 Tue May 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811160,0rcu_preempt3-21ksoftirqd/011:08:240
811120,0rcu_preempt3-21ksoftirqd/011:28:280
811110,0rcu_preempt3-21ksoftirqd/007:19:340
811080,0rcu_preempt3-21ksoftirqd/009:18:410
811020,0rcu_preempt3-21ksoftirqd/009:58:180
811010,0rcu_preempt3-21ksoftirqd/009:30:420
811010,0rcu_preempt3-21ksoftirqd/009:08:300
811010,0rcu_preempt3-21ksoftirqd/009:08:300
81980,0rcu_preempt3-21ksoftirqd/011:48:310
81970,0rcu_preempt3-21ksoftirqd/011:38:190
81960,0rcu_preempt3-21ksoftirqd/010:13:330
81940,0rcu_preempt3-21ksoftirqd/009:48:330
81930,0rcu_preempt3-21ksoftirqd/010:58:270
81930,0rcu_preempt13098-21kworker/0:010:23:310
81920,0rcu_preempt19-21ksoftirqd/111:16:081
81910,0rcu_preempt3-21ksoftirqd/012:33:330
81910,0rcu_preempt3-21ksoftirqd/011:23:210
81890,0rcu_preempt3-21ksoftirqd/011:13:200
81890,0rcu_preempt3-21ksoftirqd/010:18:250
81890,0rcu_preempt17003-21kworker/0:212:03:180
81880,0rcu_preempt3-21ksoftirqd/009:53:310
81880,0rcu_preempt3-21ksoftirqd/008:03:340
81850,0rcu_preempt3-21ksoftirqd/010:38:290
81850,0rcu_preempt3-21ksoftirqd/010:38:290
81840,0rcu_preempt3-21ksoftirqd/011:58:200
81840,0rcu_preempt3-21ksoftirqd/009:38:330
81820,0rcu_preempt851-21rngd12:28:460
81820,0rcu_preempt3-21ksoftirqd/010:03:310
81810,0rcu_preempt3-21ksoftirqd/010:48:250
81800,0rcu_preempt19-21ksoftirqd/108:03:251
81790,0rcu_preempt3-21ksoftirqd/011:47:110
81790,0rcu_preempt3-21ksoftirqd/011:33:320
81790,0rcu_preempt3-21ksoftirqd/010:53:260
81780,0rcu_preempt3-21ksoftirqd/011:03:310
81780,0rcu_preempt3-21ksoftirqd/011:03:310
81780,0rcu_preempt3-21ksoftirqd/009:43:300
81780,0rcu_preempt3-21ksoftirqd/008:43:190
81770,0rcu_preempt3-21ksoftirqd/012:13:230
81770,0rcu_preempt3-21ksoftirqd/007:08:270
81750,0rcu_preempt3-21ksoftirqd/010:43:180
81750,0rcu_preempt3-21ksoftirqd/010:08:340
81740,0rcu_preempt3-21ksoftirqd/012:23:160
81740,0rcu_preempt3-21ksoftirqd/011:53:170
81730,0rcu_preempt3-21ksoftirqd/008:48:300
81730,0rcu_preempt3-21ksoftirqd/008:08:340
81720,0rcu_preempt3-21ksoftirqd/010:33:240
81720,0rcu_preempt3-21ksoftirqd/007:33:250
81720,0rcu_preempt19-21ksoftirqd/112:13:201
81710,0rcu_preempt3-21ksoftirqd/008:18:310
81710,0rcu_preempt3-21ksoftirqd/007:23:260
81710,0rcu_preempt3-21ksoftirqd/007:23:260
81710,0rcu_preempt26722-21ps09:23:300
81710,0rcu_preempt19-21ksoftirqd/107:37:411
81700,0rcu_preempt3-21ksoftirqd/012:18:250
81700,0rcu_preempt3-21ksoftirqd/012:18:250
81700,0rcu_preempt3-21ksoftirqd/009:13:320
81700,0rcu_preempt3-21ksoftirqd/008:23:300
81690,0rcu_preempt3-21ksoftirqd/008:28:220
81690,0rcu_preempt3-21ksoftirqd/007:58:040
81690,0rcu_preempt3-21ksoftirqd/007:48:320
81690,0rcu_preempt31000-21diskstats09:28:201
81680,0rcu_preempt3-21ksoftirqd/007:43:190
81680,0rcu_preempt3-21ksoftirqd/007:32:090
81680,0rcu_preempt3-21ksoftirqd/007:13:180
81680,0rcu_preempt20019-21ping08:18:050
81670,0rcu_preempt3336-21ssh10:38:341
81670,0rcu_preempt3336-21ssh10:38:341
81670,0rcu_preempt3-21ksoftirqd/010:29:160
81660,0rcu_preempt19-21ksoftirqd/109:08:291
81660,0rcu_preempt19-21ksoftirqd/109:08:291
81650,0rcu_preempt3-21ksoftirqd/012:08:320
81650,0rcu_preempt3-21ksoftirqd/008:58:170
81650,0rcu_preempt3-21ksoftirqd/008:53:280
81640,0rcu_preempt1018-21rpcbind09:13:261
81630,0rcu_preempt3-21ksoftirqd/008:33:300
81620,0rcu_preempt3-21ksoftirqd/011:18:200
81610,0rcu_preempt19-21ksoftirqd/112:03:181
81600,0rcu_preempt25783-21kworker/0:209:33:070
81600,0rcu_preempt19-21ksoftirqd/111:24:071
81590,0rcu_preempt19-21ksoftirqd/110:55:091
81580,0rcu_preempt3-21ksoftirqd/007:38:280
81570,0rcu_preempt3-21ksoftirqd/007:58:350
81570,0rcu_preempt19-21ksoftirqd/110:15:361
81570,0rcu_preempt19-21ksoftirqd/108:33:261
81560,0rcu_preempt19-21ksoftirqd/111:58:051
81560,0rcu_preempt19-21ksoftirqd/108:11:411
81550,0rcu_preempt3-21ksoftirqd/009:03:170
81550,0rcu_preempt19-21ksoftirqd/110:01:281
81540,0rcu_preempt19-21ksoftirqd/111:08:261
81540,0rcu_preempt19-21ksoftirqd/110:31:371
81540,0rcu_preempt19-21ksoftirqd/109:27:001
81540,0rcu_preempt19-21ksoftirqd/108:24:411
81540,0rcu_preempt19-21ksoftirqd/107:28:361
81540,0rcu_preempt1855-21ps08:38:290
81530,0rcu_preempt19-21ksoftirqd/112:24:581
81530,0rcu_preempt19-21ksoftirqd/111:32:371
81530,0rcu_preempt19-21ksoftirqd/109:53:171
81530,0rcu_preempt19-21ksoftirqd/107:58:281
81520,0rcu_preempt19-21ksoftirqd/111:58:081
81520,0rcu_preempt19-21ksoftirqd/111:19:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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