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2026-05-12 - 03:52

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 Tue May 12, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811370,0rcu_preempt19-21ksoftirqd/100:28:311
811350,0rcu_preempt3-21ksoftirqd/023:43:550
811310,0rcu_preempt3-21ksoftirqd/021:18:180
811270,0rcu_preempt3-21ksoftirqd/021:53:040
811260,0rcu_preempt3-21ksoftirqd/021:28:320
811130,0rcu_preempt3-21ksoftirqd/022:50:220
811090,0rcu_preempt3-21ksoftirqd/022:23:330
811080,0rcu_preempt3-21ksoftirqd/023:38:340
811080,0rcu_preempt3-21ksoftirqd/022:15:210
811070,0rcu_preempt3-21ksoftirqd/020:18:330
811060,0rcu_preempt3-21ksoftirqd/023:33:300
811050,0rcu_preempt3-21ksoftirqd/023:08:310
811050,0rcu_preempt3-21ksoftirqd/020:43:180
811030,0rcu_preempt3-21ksoftirqd/021:13:230
811020,0rcu_preempt3-21ksoftirqd/023:28:320
811020,0rcu_preempt3-21ksoftirqd/019:08:170
811020,0rcu_preempt3-21ksoftirqd/000:18:050
811020,0rcu_preempt19-21ksoftirqd/122:48:351
811010,0rcu_preempt3-21ksoftirqd/000:18:270
811010,0rcu_preempt19-21ksoftirqd/122:33:321
811000,0rcu_preempt3-21ksoftirqd/022:08:320
811000,0rcu_preempt3-21ksoftirqd/022:08:320
81990,0rcu_preempt3-21ksoftirqd/022:53:300
81990,0rcu_preempt3-21ksoftirqd/022:28:210
81980,0rcu_preempt3-21ksoftirqd/021:23:320
81960,0rcu_preempt3-21ksoftirqd/021:43:320
81950,0rcu_preempt3-21ksoftirqd/022:58:340
81940,0rcu_preempt3-21ksoftirqd/021:58:330
81940,0rcu_preempt3-21ksoftirqd/000:03:340
81920,0rcu_preempt11844-21kworker/1:020:33:401
81910,0rcu_preempt3-21ksoftirqd/023:18:060
81910,0rcu_preempt3-21ksoftirqd/021:38:200
81910,0rcu_preempt19-21ksoftirqd/123:38:181
81900,0rcu_preempt3-21ksoftirqd/023:48:260
81900,0rcu_preempt19-21ksoftirqd/121:08:181
81890,0rcu_preempt3-21ksoftirqd/021:08:200
81870,0rcu_preempt3-21ksoftirqd/023:13:170
81870,0rcu_preempt3-21ksoftirqd/023:03:050
81860,0rcu_preempt3-21ksoftirqd/021:53:180
81850,0rcu_preempt19-21ksoftirqd/121:57:361
81830,0rcu_preempt3-21ksoftirqd/023:57:480
81830,0rcu_preempt3-21ksoftirqd/022:33:320
81830,0rcu_preempt19-21ksoftirqd/121:48:401
81830,0rcu_preempt19-21ksoftirqd/120:28:251
81830,0rcu_preempt19-21ksoftirqd/120:28:251
81820,0rcu_preempt3-21ksoftirqd/000:28:310
81810,0rcu_preempt3-21ksoftirqd/023:58:060
81810,0rcu_preempt31587-21ssh22:38:170
81790,0rcu_preempt3-21ksoftirqd/022:43:190
81780,0rcu_preempt3-21ksoftirqd/022:18:320
81780,0rcu_preempt3-21ksoftirqd/022:18:320
81780,0rcu_preempt3-21ksoftirqd/019:18:400
81780,0rcu_preempt19-21ksoftirqd/123:18:291
81770,0rcu_preempt3-21ksoftirqd/021:03:280
81770,0rcu_preempt19-21ksoftirqd/123:58:201
81770,0rcu_preempt19-21ksoftirqd/123:44:421
81760,0rcu_preempt3-21ksoftirqd/023:27:230
81750,0rcu_preempt3-21ksoftirqd/020:33:050
81750,0rcu_preempt3-21ksoftirqd/020:33:050
81750,0rcu_preempt3-21ksoftirqd/019:59:090
81750,0rcu_preempt3-21ksoftirqd/019:48:280
81750,0rcu_preempt21108-21memory20:08:320
81750,0rcu_preempt19-21ksoftirqd/120:08:331
81750,0rcu_preempt19-21ksoftirqd/119:28:211
81740,0rcu_preempt5754-21munin-node1
81740,0rcu_preempt3-21ksoftirqd/021:33:270
81740,0rcu_preempt3-21ksoftirqd/000:09:040
81740,0rcu_preempt19-21ksoftirqd/122:43:191
81740,0rcu_preempt19-21ksoftirqd/121:43:231
81740,0rcu_preempt0-21swapper/121:21:391
81730,0rcu_preempt19-21ksoftirqd/123:28:261
81730,0rcu_preempt19-21ksoftirqd/119:53:181
81720,0rcu_preempt3-21ksoftirqd/022:03:230
81720,0rcu_preempt3-21ksoftirqd/020:08:060
81720,0rcu_preempt3-21ksoftirqd/020:08:060
81720,0rcu_preempt3-21ksoftirqd/019:33:170
81720,0rcu_preempt19-21ksoftirqd/123:10:141
81710,0rcu_preempt7669-21diskmemload00:33:330
81710,0rcu_preempt19-21ksoftirqd/123:05:461
81710,0rcu_preempt19-21ksoftirqd/122:13:061
81710,0rcu_preempt19-21ksoftirqd/119:42:431
81700,0rcu_preempt19-21ksoftirqd/120:38:171
81700,0rcu_preempt19-21ksoftirqd/100:18:251
81690,0rcu_preempt19-21ksoftirqd/100:17:421
81680,0rcu_preempt3-21ksoftirqd/020:13:280
81680,0rcu_preempt3-21ksoftirqd/019:53:310
81680,0rcu_preempt19-21ksoftirqd/122:58:201
81670,0rcu_preempt3-21ksoftirqd/000:23:190
81670,0rcu_preempt19-21ksoftirqd/119:08:311
81670,0rcu_preempt19-21ksoftirqd/100:23:231
81660,0rcu_preempt19-21ksoftirqd/119:48:221
81650,0rcu_preempt19-21ksoftirqd/123:53:201
81640,0rcu_preempt19-21ksoftirqd/123:26:221
81640,0rcu_preempt19-21ksoftirqd/121:33:221
81640,0rcu_preempt19-21ksoftirqd/100:08:221
81630,0rcu_preempt3-21ksoftirqd/019:23:060
81630,0rcu_preempt19-21ksoftirqd/122:41:301
81630,0rcu_preempt19-21ksoftirqd/122:19:021
81630,0rcu_preempt19-21ksoftirqd/122:19:021
81620,0rcu_preempt3-21ksoftirqd/020:48:180
81620,0rcu_preempt19-21ksoftirqd/122:29:281
81620,0rcu_preempt19-21ksoftirqd/122:24:291
81620,0rcu_preempt19-21ksoftirqd/121:41:071
81620,0rcu_preempt19-21ksoftirqd/121:29:091
81620,0rcu_preempt19-21ksoftirqd/100:06:211
81610,0rcu_preempt3-21ksoftirqd/020:58:320
81610,0rcu_preempt3-21ksoftirqd/020:38:240
81610,0rcu_preempt19-21ksoftirqd/122:54:311
81600,0rcu_preempt3954-21ping19:43:060
81600,0rcu_preempt3954-21ping19:43:060
81600,0rcu_preempt19-21ksoftirqd/123:36:581
81600,0rcu_preempt19-21ksoftirqd/121:23:331
81590,0rcu_preempt19-21ksoftirqd/121:59:131
81590,0rcu_preempt19-21ksoftirqd/120:43:231
81580,0rcu_preempt19-21ksoftirqd/120:13:301
81580,0rcu_preempt19-21ksoftirqd/100:35:471
81570,0rcu_preempt19-21ksoftirqd/122:10:571
81570,0rcu_preempt19-21ksoftirqd/122:10:571
81560,0rcu_preempt3-21ksoftirqd/019:13:170
81560,0rcu_preempt19-21ksoftirqd/123:16:281
81560,0rcu_preempt19-21ksoftirqd/120:18:261
81550,0rcu_preempt3-21ksoftirqd/020:33:220
81550,0rcu_preempt19-21ksoftirqd/120:48:341
81550,0rcu_preempt0-21swapper/122:03:231
81540,0rcu_preempt19-21ksoftirqd/119:43:231
81540,0rcu_preempt19-21ksoftirqd/119:43:231
81540,0rcu_preempt16867-21ping20:23:210
81530,0rcu_preempt3610-21ps20:53:320
81530,0rcu_preempt19-21ksoftirqd/121:13:231
81520,0rcu_preempt19-21ksoftirqd/123:48:291
81510,0rcu_preempt19-21ksoftirqd/120:04:401
81510,0rcu_preempt19-21ksoftirqd/120:04:401
81500,0rcu_preempt851-21rngd19:05:190
81500,0rcu_preempt0-21swapper/120:58:221
81490,0rcu_preempt3-21ksoftirqd/019:28:260
81490,0rcu_preempt19-21ksoftirqd/119:59:581
81470,0rcu_preempt19-21ksoftirqd/121:03:231
81440,0rcu_preempt19-21ksoftirqd/120:55:411
81430,0rcu_preempt19-21ksoftirqd/119:03:171
10050420,0irq/346-48484003954-21ping19:39:450
81400,0rcu_preempt19-21ksoftirqd/119:34:081
81400,0rcu_preempt19-21ksoftirqd/119:19:501
81380,0rcu_preempt19-21ksoftirqd/120:25:301
81380,0rcu_preempt19-21ksoftirqd/119:13:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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