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2026-05-10 - 09:48

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 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811290,0rcu_preempt3-21ksoftirqd/022:43:070
811180,0rcu_preempt3-21ksoftirqd/023:13:360
811010,0rcu_preempt3-21ksoftirqd/021:53:340
81950,0rcu_preempt3-21ksoftirqd/022:23:330
81920,0rcu_preempt3-21ksoftirqd/021:33:370
81920,0rcu_preempt3-21ksoftirqd/021:23:260
81920,0rcu_preempt22207-21kworker/0:221:08:200
81900,0rcu_preempt3-21ksoftirqd/023:48:070
81880,0rcu_preempt30973-21munin-node0
81870,0rcu_preempt8429-21kworker/u4:223:58:270
81870,0rcu_preempt30596-21diskmemload21:18:060
81860,0rcu_preempt16807-21sed21:58:360
81850,0rcu_preempt3-21ksoftirqd/022:28:350
81850,0rcu_preempt13183-21if_can023:33:250
81840,0rcu_preempt3-21ksoftirqd/023:08:210
81830,0rcu_preempt29956-1kworker/0:0H22:48:170
81820,0rcu_preempt3-21ksoftirqd/022:44:330
81810,0rcu_preempt3-21ksoftirqd/022:08:200
81810,0rcu_preempt3-21ksoftirqd/021:43:350
81810,0rcu_preempt3-21ksoftirqd/000:03:180
81800,0rcu_preempt3-21ksoftirqd/020:03:070
81790,0rcu_preempt3-21ksoftirqd/021:28:530
81790,0rcu_preempt3-21ksoftirqd/019:43:080
81790,0rcu_preempt19-21ksoftirqd/100:13:081
81780,0rcu_preempt3-21ksoftirqd/000:34:280
81780,0rcu_preempt19-21ksoftirqd/100:23:361
81760,0rcu_preempt3-21ksoftirqd/022:58:280
81750,0rcu_preempt3-21ksoftirqd/000:28:180
81750,0rcu_preempt14916-1kworker/0:2H23:38:320
81740,0rcu_preempt3-21ksoftirqd/019:58:070
81730,0rcu_preempt3-21ksoftirqd/000:23:330
81720,0rcu_preempt3-21ksoftirqd/022:13:340
81720,0rcu_preempt3-21ksoftirqd/020:18:070
81720,0rcu_preempt3-21ksoftirqd/020:08:070
81710,0rcu_preempt3-21ksoftirqd/022:03:250
81700,0rcu_preempt3-21ksoftirqd/020:48:340
81700,0rcu_preempt3-21ksoftirqd/020:28:070
81700,0rcu_preempt3-21ksoftirqd/019:18:290
81700,0rcu_preempt19-21ksoftirqd/121:38:271
81690,0rcu_preempt3-21ksoftirqd/000:13:070
81690,0rcu_preempt19-21ksoftirqd/120:18:321
81670,0rcu_preempt3-21ksoftirqd/023:43:220
81670,0rcu_preempt3-21ksoftirqd/023:03:240
81670,0rcu_preempt3-21ksoftirqd/022:53:370
81670,0rcu_preempt3-21ksoftirqd/021:38:220
81660,0rcu_preempt3-21ksoftirqd/020:38:190
81660,0rcu_preempt3-21ksoftirqd/020:23:200
81660,0rcu_preempt3-21ksoftirqd/020:23:070
81660,0rcu_preempt19-21ksoftirqd/122:48:231
81650,0rcu_preempt3-21ksoftirqd/023:28:200
81640,0rcu_preempt3-21ksoftirqd/000:18:070
81630,0rcu_preempt3-21ksoftirqd/022:18:210
81630,0rcu_preempt3-21ksoftirqd/021:48:250
81630,0rcu_preempt3-21ksoftirqd/019:48:330
81630,0rcu_preempt3-21ksoftirqd/019:23:440
81630,0rcu_preempt3-21ksoftirqd/019:23:440
81630,0rcu_preempt3-21ksoftirqd/000:08:190
81630,0rcu_preempt30596-21diskmemload21:48:011
81630,0rcu_preempt19-21ksoftirqd/123:53:071
81630,0rcu_preempt19-21ksoftirqd/122:11:311
81630,0rcu_preempt19-21ksoftirqd/121:13:281
81620,0rcu_preempt3-21ksoftirqd/023:23:220
81620,0rcu_preempt3-21ksoftirqd/020:08:270
81620,0rcu_preempt3-21ksoftirqd/019:33:420
81620,0rcu_preempt19-21ksoftirqd/121:57:301
81620,0rcu_preempt19-21ksoftirqd/119:58:181
81610,0rcu_preempt3-21ksoftirqd/021:03:310
81610,0rcu_preempt3-21ksoftirqd/019:13:290
81610,0rcu_preempt3-21ksoftirqd/019:13:290
81610,0rcu_preempt19-21ksoftirqd/122:27:411
81610,0rcu_preempt19-21ksoftirqd/122:02:321
81600,0rcu_preempt19-21ksoftirqd/123:32:061
81600,0rcu_preempt19-21ksoftirqd/123:09:581
81600,0rcu_preempt19-21ksoftirqd/121:33:071
81600,0rcu_preempt19-21ksoftirqd/119:28:401
81600,0rcu_preempt15758-1kworker/0:2H22:33:300
81590,0rcu_preempt3-21ksoftirqd/020:58:310
81580,0rcu_preempt19-21ksoftirqd/123:18:171
81580,0rcu_preempt19-21ksoftirqd/122:57:161
81580,0rcu_preempt19-21ksoftirqd/120:53:271
81580,0rcu_preempt19-21ksoftirqd/100:37:191
81570,0rcu_preempt3-21ksoftirqd/023:53:350
81570,0rcu_preempt19-21ksoftirqd/123:54:501
81570,0rcu_preempt19-21ksoftirqd/123:05:481
81570,0rcu_preempt19-21ksoftirqd/100:22:201
81570,0rcu_preempt19-21ksoftirqd/100:03:321
81560,0rcu_preempt19-21ksoftirqd/123:26:391
81560,0rcu_preempt19-21ksoftirqd/123:16:231
81560,0rcu_preempt19-21ksoftirqd/120:08:201
81560,0rcu_preempt19-21ksoftirqd/100:08:281
81550,0rcu_preempt19-21ksoftirqd/122:58:131
81550,0rcu_preempt19-21ksoftirqd/122:33:321
81550,0rcu_preempt19-21ksoftirqd/122:16:451
81550,0rcu_preempt19-21ksoftirqd/100:32:301
81540,0rcu_preempt2824-21munin-node0
81540,0rcu_preempt21649-1kworker/0:2H19:03:270
81540,0rcu_preempt19-21ksoftirqd/121:18:471
81530,0rcu_preempt19-21ksoftirqd/123:58:241
81530,0rcu_preempt19-21ksoftirqd/123:42:531
81530,0rcu_preempt19-21ksoftirqd/121:52:551
81520,0rcu_preempt19-21ksoftirqd/123:37:151
81520,0rcu_preempt19-21ksoftirqd/122:20:171
81520,0rcu_preempt19-21ksoftirqd/119:57:561
81510,0rcu_preempt3-21ksoftirqd/021:18:280
81500,0rcu_preempt3-21ksoftirqd/019:28:440
81500,0rcu_preempt30596-21diskmemload22:40:231
81500,0rcu_preempt19-21ksoftirqd/122:03:321
81500,0rcu_preempt19-21ksoftirqd/121:08:191
81490,0rcu_preempt3-21ksoftirqd/020:33:290
81490,0rcu_preempt3-21ksoftirqd/019:08:330
81480,0rcu_preempt19-21ksoftirqd/122:45:071
81480,0rcu_preempt19-21ksoftirqd/121:26:211
10050480,0irq/346-4848400181ktimersoftd/121:32:271
81470,0rcu_preempt12990-21ssh22:28:171
81460,0rcu_preempt19-21ksoftirqd/119:48:261
81450,0rcu_preempt19-21ksoftirqd/120:03:191
81440,0rcu_preempt19-21ksoftirqd/123:47:371
81420,0rcu_preempt19-21ksoftirqd/120:43:271
81420,0rcu_preempt19-21ksoftirqd/120:13:261
81410,0rcu_preempt19-21ksoftirqd/120:23:171
9950400,0irq/345-484840023591-21ls19:08:061
81390,0rcu_preempt3-21ksoftirqd/020:43:240
81390,0rcu_preempt19-21ksoftirqd/120:58:261
81390,0rcu_preempt19-21ksoftirqd/119:08:381
272502390,0chrt27032-1kworker/0:0H20:57:390
81380,0rcu_preempt24659-21munin-node1
81380,0rcu_preempt19-21ksoftirqd/120:38:261
81370,0rcu_preempt19-21ksoftirqd/121:03:341
81370,0rcu_preempt19-21ksoftirqd/120:33:231
81350,0rcu_preempt29881-1kworker/1:1H19:26:311
81350,0rcu_preempt29881-1kworker/1:1H19:26:311
1699350,0migration/125737-21munin-node1
1699350,0migration/125737-21munin-node1
81340,0rcu_preempt19-21ksoftirqd/119:18:251
81330,0rcu_preempt19-21ksoftirqd/119:46:001
81320,0rcu_preempt26891-21ping19:33:211
81320,0rcu_preempt19-21ksoftirqd/119:38:211
81320,0rcu_preempt0-21swapper/120:29:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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