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2025-12-25 - 13:33

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Thu Dec 25, 2025 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811100,0rcu_preempt23807-21diskmemload23:30:361
811100,0rcu_preempt23807-21diskmemload23:30:361
811050,0rcu_preempt19-21ksoftirqd/123:45:021
81890,0rcu_preempt19-21ksoftirqd/122:42:001
81880,0rcu_preempt19-21ksoftirqd/119:50:091
81870,0rcu_preempt19-21ksoftirqd/121:30:031
81870,0rcu_preempt19-21ksoftirqd/121:30:031
81870,0rcu_preempt0-21swapper/119:25:221
81850,0rcu_preempt1566-1kworker/1:0H22:00:021
81810,0rcu_preempt19-21ksoftirqd/122:53:591
81790,0rcu_preempt19-21ksoftirqd/122:32:541
81780,0rcu_preempt23807-21diskmemload23:09:461
81770,0rcu_preempt3-21ksoftirqd/000:12:080
81770,0rcu_preempt23807-21diskmemload00:36:401
81760,0rcu_preempt3-21ksoftirqd/021:40:100
81760,0rcu_preempt19-21ksoftirqd/123:20:011
81750,0rcu_preempt3-21ksoftirqd/022:36:090
81740,0rcu_preempt19-21ksoftirqd/123:35:121
81740,0rcu_preempt19-21ksoftirqd/121:20:121
81740,0rcu_preempt19-21ksoftirqd/100:05:321
81740,0rcu_preempt19-21ksoftirqd/100:05:321
81730,0rcu_preempt23807-21diskmemload23:04:531
81720,0rcu_preempt23807-21diskmemload21:10:231
81710,0rcu_preempt3-21ksoftirqd/000:35:310
81710,0rcu_preempt23807-21diskmemload22:48:491
81710,0rcu_preempt19-21ksoftirqd/100:10:401
81700,0rcu_preempt3-21ksoftirqd/023:44:420
81700,0rcu_preempt3-21ksoftirqd/023:05:010
81700,0rcu_preempt3-21ksoftirqd/022:55:300
81700,0rcu_preempt3-21ksoftirqd/000:34:300
81700,0rcu_preempt23807-21diskmemload21:25:301
81690,0rcu_preempt3-21ksoftirqd/023:22:050
81690,0rcu_preempt3-21ksoftirqd/021:34:390
81690,0rcu_preempt3-21ksoftirqd/021:34:390
81690,0rcu_preempt3-21ksoftirqd/000:26:540
81690,0rcu_preempt20198-21ping19:25:280
81680,0rcu_preempt3-21ksoftirqd/023:13:330
81680,0rcu_preempt3-21ksoftirqd/023:00:470
81680,0rcu_preempt3-21ksoftirqd/022:50:080
81680,0rcu_preempt3-21ksoftirqd/022:48:520
81680,0rcu_preempt3-21ksoftirqd/022:33:480
81680,0rcu_preempt3-21ksoftirqd/022:26:190
81680,0rcu_preempt3-21ksoftirqd/022:21:260
81680,0rcu_preempt3-21ksoftirqd/021:54:090
81670,0rcu_preempt3-21ksoftirqd/023:38:050
81670,0rcu_preempt3-21ksoftirqd/023:17:050
81670,0rcu_preempt3-21ksoftirqd/022:08:080
81670,0rcu_preempt3-21ksoftirqd/021:27:590
81670,0rcu_preempt3-21ksoftirqd/021:17:160
81670,0rcu_preempt3-21ksoftirqd/021:10:230
81670,0rcu_preempt3-21ksoftirqd/000:03:500
81670,0rcu_preempt11668-1kworker/1:2H22:20:241
81670,0rcu_preempt1121-21kworker/1:123:17:371
81660,0rcu_preempt3-21ksoftirqd/020:00:310
81660,0rcu_preempt3-21ksoftirqd/000:24:270
55302660,0sleep19950irq/345-484840023:53:511
81650,0rcu_preempt635-21ping20:10:100
81650,0rcu_preempt3-21ksoftirqd/021:36:360
81650,0rcu_preempt19-21ksoftirqd/119:39:591
81640,0rcu_preempt3-21ksoftirqd/022:12:010
81640,0rcu_preempt3-21ksoftirqd/022:12:010
81640,0rcu_preempt3-21ksoftirqd/020:50:310
81630,0rcu_preempt3-21ksoftirqd/023:56:060
81630,0rcu_preempt19-21ksoftirqd/100:15:331
81620,0rcu_preempt4178-1kworker/1:1H00:00:351
81620,0rcu_preempt3-21ksoftirqd/022:03:430
81620,0rcu_preempt30035-1kworker/1:3H00:25:181
81620,0rcu_preempt19-21ksoftirqd/121:47:491
81620,0rcu_preempt13727-1kworker/1:0H22:15:471
81610,0rcu_preempt23807-21diskmemload21:19:561
81600,0rcu_preempt3-21ksoftirqd/000:16:010
81600,0rcu_preempt19-21ksoftirqd/120:05:291
90002590,0sleep010050irq/346-484840020:24:020
81590,0rcu_preempt3-21ksoftirqd/023:25:290
81590,0rcu_preempt3-21ksoftirqd/000:07:090
81590,0rcu_preempt3-21ksoftirqd/000:07:090
81590,0rcu_preempt19-21ksoftirqd/119:40:011
81580,0rcu_preempt19-21ksoftirqd/123:55:101
81570,0rcu_preempt3-21ksoftirqd/022:18:140
81570,0rcu_preempt19-21ksoftirqd/121:57:141
38212570,0sleep010050irq/346-484840020:06:160
9950540,0irq/345-484840017856-21sendmail-msp21:40:061
81540,0rcu_preempt19-21ksoftirqd/120:10:101
81540,0rcu_preempt0-21swapper/120:20:161
81530,0rcu_preempt3-21ksoftirqd/022:40:210
81520,0rcu_preempt3-21ksoftirqd/020:35:090
81520,0rcu_preempt19-21ksoftirqd/122:26:531
81510,0rcu_preempt3-21ksoftirqd/021:55:190
5150510,0irq/332-48070000-21swapper/023:45:490
81500,0rcu_preempt3-21ksoftirqd/023:50:160
81500,0rcu_preempt3-21ksoftirqd/023:33:040
81500,0rcu_preempt3-21ksoftirqd/023:33:040
81500,0rcu_preempt3-21ksoftirqd/021:45:580
81500,0rcu_preempt3-21ksoftirqd/021:24:040
81500,0rcu_preempt3-21ksoftirqd/021:00:180
81500,0rcu_preempt3-21ksoftirqd/020:19:570
81500,0rcu_preempt29625-21kworker/1:020:04:001
81500,0rcu_preempt21535-1kworker/1:4H19:30:161
269552500,0sleep19950irq/345-484840023:40:311
10050490,0irq/346-48484003-21ksoftirqd/019:37:220
81480,0rcu_preempt3-21ksoftirqd/019:59:160
81480,0rcu_preempt3-21ksoftirqd/019:20:090
248482480,0sleep010050irq/346-484840019:32:150
81470,0rcu_preempt3-21ksoftirqd/019:19:220
81470,0rcu_preempt19-21ksoftirqd/120:16:101
81460,0rcu_preempt3-21ksoftirqd/020:25:270
81460,0rcu_preempt23807-21diskmemload22:57:221
10050460,0irq/346-48484007715-1kworker/0:1H19:05:170
81450,0rcu_preempt3-21ksoftirqd/020:40:090
81450,0rcu_preempt19-21ksoftirqd/122:35:081
81450,0rcu_preempt19-21ksoftirqd/120:26:591
4350450,0irq/32-4330000020198-21ping19:40:130
314652450,0chrt9950irq/345-484840000:23:341
10050450,0irq/346-484840020198-21ping19:45:220
10050450,0irq/346-484840015337-1kworker/0:2H20:47:350
10050440,0irq/346-48484000-21swapper/019:50:350
81430,0rcu_preempt19-21ksoftirqd/123:14:581
81430,0rcu_preempt19-21ksoftirqd/119:58:591
81430,0rcu_preempt12504-21apt-get20:35:091
139672430,0sleep19950irq/345-484840022:11:231
139672430,0sleep19950irq/345-484840022:11:231
10050430,0irq/346-484840021879-1kworker/0:3H21:06:400
81420,0rcu_preempt3-21ksoftirqd/020:55:240
81420,0rcu_preempt3-21ksoftirqd/019:10:100
81420,0rcu_preempt19-21ksoftirqd/121:50:151
81420,0rcu_preempt19-21ksoftirqd/100:30:221
213982420,0chrt9950irq/345-484840021:00:251
81410,0rcu_preempt5507-1kworker/1:1H20:40:491
81410,0rcu_preempt19-21ksoftirqd/119:05:081
81400,0rcu_preempt19-21ksoftirqd/123:25:231
81400,0rcu_preempt19-21ksoftirqd/122:09:441
81400,0rcu_preempt19-21ksoftirqd/121:35:401
81400,0rcu_preempt1384-21munin-node20:54:291
81390,0rcu_preempt19-21ksoftirqd/120:55:141
81390,0rcu_preempt19-21ksoftirqd/120:46:241
81390,0rcu_preempt19-21ksoftirqd/119:15:321
81380,0rcu_preempt19-21ksoftirqd/120:30:411
81380,0rcu_preempt19-21ksoftirqd/119:11:251
81370,0rcu_preempt3-21ksoftirqd/020:30:110
10050370,0irq/346-484840020220-21sendmail-msp19:20:001
81360,0rcu_preempt19-21ksoftirqd/121:05:051
81350,0rcu_preempt19-21ksoftirqd/119:49:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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