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2026-07-10 - 08:56

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 Fri Jul 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811580,0rcu_preempt3-21ksoftirqd/019:22:080
811400,0rcu_preempt12262-21kworker/0:219:36:190
811320,0rcu_preempt3-21ksoftirqd/019:29:300
811260,0rcu_preempt3-21ksoftirqd/023:22:070
811220,0rcu_preempt3-21ksoftirqd/022:42:210
811150,0rcu_preempt3-21ksoftirqd/021:12:290
811120,0rcu_preempt10001-21cyclictest00:12:320
811100,0rcu_preempt6824-1kworker/0:1H20:36:060
811060,0rcu_preempt13282-21ping19:41:550
811040,0rcu_preempt3-21ksoftirqd/020:52:330
811040,0rcu_preempt13895-21kworker/0:222:07:360
811020,0rcu_preempt3-21ksoftirqd/023:07:280
811010,0rcu_preempt3-21ksoftirqd/023:55:230
811010,0rcu_preempt3-21ksoftirqd/021:22:300
81990,0rcu_preempt12262-21kworker/0:219:17:080
81990,0rcu_preempt12262-21kworker/0:219:17:080
81970,0rcu_preempt3-21ksoftirqd/021:17:200
81970,0rcu_preempt3-21ksoftirqd/000:10:010
81960,0rcu_preempt3-21ksoftirqd/000:02:380
81950,0rcu_preempt3-21ksoftirqd/021:42:080
81940,0rcu_preempt3-21ksoftirqd/020:37:340
81930,0rcu_preempt3-21ksoftirqd/019:52:080
81920,0rcu_preempt3-21ksoftirqd/022:37:080
81920,0rcu_preempt3-21ksoftirqd/020:22:360
81920,0rcu_preempt3-21ksoftirqd/000:27:410
81910,0rcu_preempt3-21ksoftirqd/023:22:360
81910,0rcu_preempt3-21ksoftirqd/022:47:450
81860,0rcu_preempt3-21ksoftirqd/021:37:330
81850,0rcu_preempt3-21ksoftirqd/022:17:220
81850,0rcu_preempt3-21ksoftirqd/019:42:370
81840,0rcu_preempt3-21ksoftirqd/023:47:080
81840,0rcu_preempt3-21ksoftirqd/022:12:400
81840,0rcu_preempt3-21ksoftirqd/000:17:330
81830,0rcu_preempt3-21ksoftirqd/000:02:070
81820,0rcu_preempt3-21ksoftirqd/022:02:080
81810,0rcu_preempt3-21ksoftirqd/023:02:360
81810,0rcu_preempt3-21ksoftirqd/020:17:070
81810,0rcu_preempt3-21ksoftirqd/019:52:080
81810,0rcu_preempt19-21ksoftirqd/122:17:071
81810,0rcu_preempt19009-1kworker/0:2H00:25:430
81800,0rcu_preempt3-21ksoftirqd/021:32:330
81790,0rcu_preempt3-21ksoftirqd/022:27:070
81780,0rcu_preempt3-21ksoftirqd/023:47:210
81770,0rcu_preempt4591-21dropbear22:32:210
81740,0rcu_preempt3-21ksoftirqd/022:59:580
81740,0rcu_preempt3-21ksoftirqd/021:57:190
81740,0rcu_preempt3-21ksoftirqd/020:07:200
81740,0rcu_preempt3-21ksoftirqd/019:22:080
81730,0rcu_preempt11046-21kworker/0:023:32:210
81720,0rcu_preempt17011-21diskmemload00:12:171
81710,0rcu_preempt19-21ksoftirqd/119:42:241
81700,0rcu_preempt3-21ksoftirqd/022:52:330
81700,0rcu_preempt3-21ksoftirqd/021:52:350
81700,0rcu_preempt3-21ksoftirqd/021:27:330
81700,0rcu_preempt3-21ksoftirqd/021:07:180
81700,0rcu_preempt3-21ksoftirqd/021:07:180
81700,0rcu_preempt3-21ksoftirqd/019:12:080
81700,0rcu_preempt27977-21kworker/0:220:17:170
81680,0rcu_preempt3-21ksoftirqd/020:57:280
81670,0rcu_preempt3-21ksoftirqd/021:50:120
81670,0rcu_preempt3-21ksoftirqd/020:47:200
81670,0rcu_preempt3-21ksoftirqd/000:33:300
81660,0rcu_preempt3-21ksoftirqd/020:02:220
81660,0rcu_preempt19-21ksoftirqd/121:08:531
81660,0rcu_preempt19-21ksoftirqd/121:08:531
81650,0rcu_preempt4440-21dropbear23:37:230
81650,0rcu_preempt3-21ksoftirqd/020:02:080
81650,0rcu_preempt3-21ksoftirqd/020:02:080
81640,0rcu_preempt4193-21df_abs20:27:210
81640,0rcu_preempt3-21ksoftirqd/020:42:310
81640,0rcu_preempt19-21ksoftirqd/120:37:221
81630,0rcu_preempt3-21ksoftirqd/023:27:360
81630,0rcu_preempt3-21ksoftirqd/023:12:360
81620,0rcu_preempt3-21ksoftirqd/022:22:260
81620,0rcu_preempt19-21ksoftirqd/123:52:241
81610,0rcu_preempt19-21ksoftirqd/122:52:301
81590,0rcu_preempt19-21ksoftirqd/120:57:201
81590,0rcu_preempt19-21ksoftirqd/100:22:341
81580,0rcu_preempt9950irq/345-484840000:10:331
81570,0rcu_preempt19-21ksoftirqd/122:02:341
81550,0rcu_preempt19-21ksoftirqd/123:37:531
81550,0rcu_preempt0-21swapper/121:37:111
81540,0rcu_preempt19-21ksoftirqd/122:41:401
81530,0rcu_preempt16099-21meminfo21:02:300
81520,0rcu_preempt19-21ksoftirqd/123:13:031
81510,0rcu_preempt19-21ksoftirqd/123:08:271
81510,0rcu_preempt19-21ksoftirqd/121:13:011
81500,0rcu_preempt3-21ksoftirqd/019:02:250
81500,0rcu_preempt19-21ksoftirqd/100:34:391
81490,0rcu_preempt0-21swapper/122:20:541
81470,0rcu_preempt1867-1kworker/1:2H22:30:061
81470,0rcu_preempt1049-21avahi-daemon23:27:521
81460,0rcu_preempt26089-1kworker/1:1H20:07:161
81460,0rcu_preempt19-21ksoftirqd/121:57:331
81460,0rcu_preempt19-21ksoftirqd/121:22:131
81450,0rcu_preempt19-21ksoftirqd/122:22:481
81440,0rcu_preempt19-21ksoftirqd/122:42:331
81440,0rcu_preempt19-21ksoftirqd/121:30:061
81440,0rcu_preempt17011-21diskmemload00:29:051
81430,0rcu_preempt19-21ksoftirqd/123:02:331
81430,0rcu_preempt19-21ksoftirqd/119:02:271
81430,0rcu_preempt17011-21diskmemload23:33:521
81420,0rcu_preempt19-21ksoftirqd/122:49:151
81410,0rcu_preempt27217-21apt-get21:17:191
81410,0rcu_preempt19-21ksoftirqd/123:46:301
81410,0rcu_preempt19-21ksoftirqd/120:43:311
81410,0rcu_preempt19-21ksoftirqd/120:22:361
81400,0rcu_preempt19-21ksoftirqd/123:23:331
81400,0rcu_preempt19-21ksoftirqd/123:21:471
81400,0rcu_preempt19-21ksoftirqd/122:36:131
81400,0rcu_preempt19-21ksoftirqd/100:19:371
81400,0rcu_preempt17011-21diskmemload21:48:351
81390,0rcu_preempt19-21ksoftirqd/123:58:391
81390,0rcu_preempt19-21ksoftirqd/122:57:251
81390,0rcu_preempt19-21ksoftirqd/121:42:251
81390,0rcu_preempt19-21ksoftirqd/121:32:181
81390,0rcu_preempt19-21ksoftirqd/119:52:331
81380,0rcu_preempt19-21ksoftirqd/123:50:281
81380,0rcu_preempt19-21ksoftirqd/121:55:371
81380,0rcu_preempt19-21ksoftirqd/121:06:171
81380,0rcu_preempt19-21ksoftirqd/120:35:411
81380,0rcu_preempt19-21ksoftirqd/120:17:271
81380,0rcu_preempt19-21ksoftirqd/119:27:231
81380,0rcu_preempt19-21ksoftirqd/119:12:181
81380,0rcu_preempt19-21ksoftirqd/119:12:181
81380,0rcu_preempt17011-21diskmemload00:03:171
81370,0rcu_preempt19-21ksoftirqd/122:07:111
81370,0rcu_preempt19-21ksoftirqd/119:49:251
81360,0rcu_preempt19-21ksoftirqd/120:52:181
81360,0rcu_preempt19-21ksoftirqd/120:29:081
81360,0rcu_preempt19-21ksoftirqd/119:57:331
81360,0rcu_preempt19-21ksoftirqd/119:57:331
81360,0rcu_preempt19-21ksoftirqd/119:09:561
81350,0rcu_preempt19-21ksoftirqd/120:52:011
81350,0rcu_preempt19-21ksoftirqd/120:12:321
81350,0rcu_preempt19-21ksoftirqd/119:37:411
81350,0rcu_preempt19-21ksoftirqd/119:17:131
81340,0rcu_preempt19-21ksoftirqd/120:07:071
81340,0rcu_preempt19-21ksoftirqd/119:37:081
10003993218,0cyclictest15934-21munin-node1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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