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2026-05-10 - 19:33

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 Sun May 10, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811640,0rcu_preempt19-21ksoftirqd/107:38:311
811620,0rcu_preempt12955-1kworker/1:1H07:23:061
811620,0rcu_preempt12955-1kworker/1:1H07:23:061
811360,0rcu_preempt19-21ksoftirqd/107:35:531
811350,0rcu_preempt3-21ksoftirqd/009:28:060
811340,0rcu_preempt3-21ksoftirqd/012:03:300
811330,0rcu_preempt19-21ksoftirqd/107:43:281
811330,0rcu_preempt19-21ksoftirqd/107:43:281
811210,0rcu_preempt3-21ksoftirqd/012:28:340
811210,0rcu_preempt19-21ksoftirqd/110:13:341
811170,0rcu_preempt3-21ksoftirqd/008:43:320
811140,0rcu_preempt19-21ksoftirqd/111:13:261
811130,0rcu_preempt3-21ksoftirqd/011:21:590
811110,0rcu_preempt3-21ksoftirqd/011:13:330
811110,0rcu_preempt19-21ksoftirqd/109:23:291
811100,0rcu_preempt3-21ksoftirqd/009:18:350
811100,0rcu_preempt3-21ksoftirqd/009:18:350
811100,0rcu_preempt3-21ksoftirqd/009:13:260
811100,0rcu_preempt19-21ksoftirqd/110:48:201
811100,0rcu_preempt19-21ksoftirqd/110:43:061
811090,0rcu_preempt19-21ksoftirqd/109:08:181
811090,0rcu_preempt15323-21diskmemload09:28:071
811080,0rcu_preempt3-21ksoftirqd/010:33:360
811080,0rcu_preempt3-21ksoftirqd/010:33:360
811070,0rcu_preempt3-21ksoftirqd/010:53:370
811070,0rcu_preempt3-21ksoftirqd/010:53:370
811070,0rcu_preempt19-21ksoftirqd/110:54:201
811070,0rcu_preempt19-21ksoftirqd/110:54:201
811050,0rcu_preempt7861-21ssh11:43:311
811040,0rcu_preempt3-21ksoftirqd/009:58:200
811040,0rcu_preempt19-21ksoftirqd/111:23:351
811040,0rcu_preempt11608-21ping07:43:190
811040,0rcu_preempt11608-21ping07:43:190
811030,0rcu_preempt3-21ksoftirqd/011:43:200
811030,0rcu_preempt19-21ksoftirqd/108:58:281
811020,0rcu_preempt3-21ksoftirqd/011:38:330
811020,0rcu_preempt19-21ksoftirqd/110:58:331
811020,0rcu_preempt14387-1kworker/1:0H11:09:171
81990,0rcu_preempt3-21ksoftirqd/009:34:220
81970,0rcu_preempt3-21ksoftirqd/009:28:300
81970,0rcu_preempt19-21ksoftirqd/107:30:001
81960,0rcu_preempt3-21ksoftirqd/011:08:300
81960,0rcu_preempt3-21ksoftirqd/010:58:320
81960,0rcu_preempt19-21ksoftirqd/108:13:361
81940,0rcu_preempt19-21ksoftirqd/112:23:341
81930,0rcu_preempt19-21ksoftirqd/109:18:331
81930,0rcu_preempt19-21ksoftirqd/109:18:331
81930,0rcu_preempt19-21ksoftirqd/109:15:581
81910,0rcu_preempt19-21ksoftirqd/108:43:191
81900,0rcu_preempt3-21ksoftirqd/011:03:280
81900,0rcu_preempt3-21ksoftirqd/010:28:190
81900,0rcu_preempt3-21ksoftirqd/010:23:200
81890,0rcu_preempt3-21ksoftirqd/011:48:210
81890,0rcu_preempt19-21ksoftirqd/112:03:531
81890,0rcu_preempt19-21ksoftirqd/110:18:261
81880,0rcu_preempt19-21ksoftirqd/109:38:341
81870,0rcu_preempt2324-21apt-get08:28:160
81860,0rcu_preempt19-21ksoftirqd/110:13:061
81860,0rcu_preempt19-21ksoftirqd/107:58:351
81860,0rcu_preempt19-21ksoftirqd/107:53:281
81840,0rcu_preempt3-21ksoftirqd/010:03:220
81840,0rcu_preempt19832-21sort10:18:060
81840,0rcu_preempt19-21ksoftirqd/111:38:341
81840,0rcu_preempt19-21ksoftirqd/111:38:061
81840,0rcu_preempt15323-21diskmemload12:18:251
81830,0rcu_preempt3-21ksoftirqd/012:23:320
81830,0rcu_preempt19-21ksoftirqd/109:48:181
81830,0rcu_preempt19-21ksoftirqd/108:28:251
81830,0rcu_preempt19-21ksoftirqd/107:08:071
81820,0rcu_preempt3-21ksoftirqd/011:53:340
81820,0rcu_preempt3-21ksoftirqd/009:09:280
81820,0rcu_preempt3-21ksoftirqd/008:58:070
81820,0rcu_preempt19-21ksoftirqd/109:58:301
81810,0rcu_preempt3-21ksoftirqd/010:18:330
81810,0rcu_preempt31892-21kworker/0:012:20:290
81810,0rcu_preempt19-21ksoftirqd/110:28:191
81810,0rcu_preempt19-21ksoftirqd/108:48:261
81810,0rcu_preempt18648-21ntpdc09:43:300
81800,0rcu_preempt3-21ksoftirqd/009:48:160
81800,0rcu_preempt3-21ksoftirqd/008:13:060
81800,0rcu_preempt19-21ksoftirqd/109:53:281
81800,0rcu_preempt19-21ksoftirqd/107:08:061
81800,0rcu_preempt12276-21ssh10:43:070
81800,0rcu_preempt12276-21ssh10:43:070
81790,0rcu_preempt8325-21cyclictest11:28:190
81790,0rcu_preempt3-21ksoftirqd/012:33:340
81790,0rcu_preempt3-21ksoftirqd/010:48:070
81790,0rcu_preempt19-21ksoftirqd/112:08:321
81790,0rcu_preempt19-21ksoftirqd/111:31:311
81790,0rcu_preempt19-21ksoftirqd/110:23:291
81790,0rcu_preempt19-21ksoftirqd/108:08:371
81790,0rcu_preempt19-21ksoftirqd/108:03:301
81780,0rcu_preempt3-21ksoftirqd/011:58:160
81780,0rcu_preempt15323-21diskmemload10:43:211
81780,0rcu_preempt15323-21diskmemload10:43:211
81770,0rcu_preempt26006-21ssh12:02:301
81770,0rcu_preempt19-21ksoftirqd/112:13:261
81770,0rcu_preempt19-21ksoftirqd/109:33:311
81770,0rcu_preempt15323-21diskmemload12:35:391
81760,0rcu_preempt3-21ksoftirqd/011:35:070
81760,0rcu_preempt19-21ksoftirqd/111:48:301
81760,0rcu_preempt19-21ksoftirqd/107:23:171
81760,0rcu_preempt19-21ksoftirqd/107:23:171
81760,0rcu_preempt19-21ksoftirqd/107:18:071
81750,0rcu_preempt3-21ksoftirqd/008:03:380
81750,0rcu_preempt3-21ksoftirqd/007:23:360
81750,0rcu_preempt3-21ksoftirqd/007:23:360
81750,0rcu_preempt19-21ksoftirqd/112:28:321
81750,0rcu_preempt19-21ksoftirqd/110:08:061
81740,0rcu_preempt3-21ksoftirqd/011:23:210
81740,0rcu_preempt3-21ksoftirqd/007:28:380
81730,0rcu_preempt19-21ksoftirqd/110:33:331
81730,0rcu_preempt19-21ksoftirqd/110:33:331
81720,0rcu_preempt3-21ksoftirqd/010:08:320
81720,0rcu_preempt19-21ksoftirqd/109:03:191
81720,0rcu_preempt19-21ksoftirqd/108:18:071
81710,0rcu_preempt19-21ksoftirqd/111:03:201
81700,0rcu_preempt3-21ksoftirqd/009:53:190
81700,0rcu_preempt3-21ksoftirqd/007:13:070
81700,0rcu_preempt19-21ksoftirqd/108:38:331
81690,0rcu_preempt3-21ksoftirqd/012:13:200
81690,0rcu_preempt3-21ksoftirqd/009:38:300
81690,0rcu_preempt3-21ksoftirqd/007:58:070
81690,0rcu_preempt19-21ksoftirqd/111:55:181
81680,0rcu_preempt19-21ksoftirqd/109:43:181
81670,0rcu_preempt3-21ksoftirqd/012:08:310
81660,0rcu_preempt3-21ksoftirqd/008:33:340
81660,0rcu_preempt3-21ksoftirqd/007:48:350
81660,0rcu_preempt24901-21apt-get07:58:160
81650,0rcu_preempt15323-21diskmemload11:19:261
81640,0rcu_preempt3-21ksoftirqd/008:23:250
81630,0rcu_preempt3-21ksoftirqd/007:18:080
81630,0rcu_preempt3-21ksoftirqd/007:18:080
81620,0rcu_preempt3-21ksoftirqd/010:38:200
81610,0rcu_preempt3-21ksoftirqd/009:03:330
81610,0rcu_preempt3-21ksoftirqd/007:38:240
81600,0rcu_preempt3-21ksoftirqd/008:13:320
81590,0rcu_preempt3-21ksoftirqd/007:13:070
81550,0rcu_preempt19-21ksoftirqd/108:27:041
81540,0rcu_preempt19-21ksoftirqd/108:53:201
81540,0rcu_preempt19-21ksoftirqd/108:33:061
81530,0rcu_preempt3-21ksoftirqd/008:48:220
81530,0rcu_preempt3-21ksoftirqd/007:03:240
81520,0rcu_preempt3-21ksoftirqd/008:38:310
81500,0rcu_preempt3-21ksoftirqd/008:53:190
81470,0rcu_preempt3-21ksoftirqd/008:18:330
81470,0rcu_preempt11608-21ping07:38:060
81380,0rcu_preempt19-21ksoftirqd/107:48:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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