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2026-08-01 - 12:29

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 Sat Aug 01, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811130,0rcu_preempt19-21ksoftirqd/119:20:361
81900,0rcu_preempt19-21ksoftirqd/119:30:261
81880,0rcu_preempt19-21ksoftirqd/123:05:211
81810,0rcu_preempt19-21ksoftirqd/119:35:111
81790,0rcu_preempt19-21ksoftirqd/123:25:111
81780,0rcu_preempt19-21ksoftirqd/121:30:281
81780,0rcu_preempt19-21ksoftirqd/100:29:591
81730,0rcu_preempt3-21ksoftirqd/022:05:150
81730,0rcu_preempt19-21ksoftirqd/123:40:271
81710,0rcu_preempt3-21ksoftirqd/023:56:530
81710,0rcu_preempt17622-21diskmemload21:49:540
81700,0rcu_preempt3645-21kworker/0:123:14:460
81700,0rcu_preempt2668-21kworker/0:020:35:210
81700,0rcu_preempt26511-21kworker/0:220:10:190
81700,0rcu_preempt13916-21ping19:20:110
81700,0rcu_preempt11278-21kworker/1:022:12:081
81700,0rcu_preempt11278-21kworker/1:022:12:081
81690,0rcu_preempt540-21ssh21:58:160
81690,0rcu_preempt3-21ksoftirqd/000:08:210
81690,0rcu_preempt18758-21ssh21:43:560
81680,0rcu_preempt5217-21ssh22:02:550
81680,0rcu_preempt3886-21kworker/0:019:50:230
81680,0rcu_preempt3-21ksoftirqd/022:43:380
81680,0rcu_preempt3-21ksoftirqd/022:18:470
81680,0rcu_preempt24417-21kworker/0:122:29:440
81680,0rcu_preempt17622-21diskmemload22:59:060
81680,0rcu_preempt17396-21kworker/0:200:02:510
81670,0rcu_preempt3-21ksoftirqd/023:25:320
81670,0rcu_preempt3-21ksoftirqd/021:20:130
81670,0rcu_preempt3-21ksoftirqd/020:19:210
81670,0rcu_preempt3-21ksoftirqd/020:05:260
81670,0rcu_preempt3-21ksoftirqd/019:40:170
81670,0rcu_preempt3-21ksoftirqd/000:25:170
81670,0rcu_preempt19-21ksoftirqd/123:38:081
81670,0rcu_preempt13916-21ping19:30:250
81670,0rcu_preempt11154-21ssh00:21:350
81660,0rcu_preempt3-21ksoftirqd/023:41:240
81660,0rcu_preempt3-21ksoftirqd/021:52:430
81660,0rcu_preempt3-21ksoftirqd/020:00:250
81660,0rcu_preempt3-21ksoftirqd/000:35:480
81660,0rcu_preempt24879-21ssh22:22:590
81660,0rcu_preempt24192-21ssh21:15:410
81660,0rcu_preempt17622-21diskmemload23:08:320
81660,0rcu_preempt17046-21ssh23:20:440
81660,0rcu_preempt14876-21sed22:45:240
81660,0rcu_preempt12861-21ssh21:37:360
81660,0rcu_preempt0-21swapper/000:17:320
81650,0rcu_preempt3-21ksoftirqd/022:35:100
81650,0rcu_preempt3-21ksoftirqd/022:10:260
81650,0rcu_preempt3-21ksoftirqd/022:10:260
81650,0rcu_preempt3-21ksoftirqd/021:32:060
81650,0rcu_preempt3-21ksoftirqd/021:10:290
81650,0rcu_preempt3-21ksoftirqd/020:25:270
81650,0rcu_preempt3-21ksoftirqd/020:20:240
81650,0rcu_preempt1959-21ssh00:12:410
81650,0rcu_preempt17622-21diskmemload23:01:520
81650,0rcu_preempt17622-21diskmemload00:34:490
81650,0rcu_preempt1750-21ssh21:25:510
81650,0rcu_preempt13233-21irqstats23:50:210
81640,0rcu_preempt3-21ksoftirqd/023:45:280
81640,0rcu_preempt3-21ksoftirqd/022:33:010
81640,0rcu_preempt3-21ksoftirqd/022:33:010
81640,0rcu_preempt3-21ksoftirqd/020:45:220
81640,0rcu_preempt25400-21ssh23:30:080
81640,0rcu_preempt11897-21ssh23:15:310
81640,0rcu_preempt0-21swapper/022:54:430
81640,0rcu_preempt0-21swapper/022:54:430
81630,0rcu_preempt3-21ksoftirqd/019:55:210
81630,0rcu_preempt2496-21ssh23:39:540
81620,0rcu_preempt3-21ksoftirqd/020:55:240
81620,0rcu_preempt3-21ksoftirqd/020:30:110
81620,0rcu_preempt3-21ksoftirqd/019:39:590
81620,0rcu_preempt3-21ksoftirqd/019:29:550
81620,0rcu_preempt3-21ksoftirqd/019:29:550
81620,0rcu_preempt3-21ksoftirqd/019:10:120
81620,0rcu_preempt3-21ksoftirqd/019:10:120
81620,0rcu_preempt19-21ksoftirqd/119:15:251
81610,0rcu_preempt3-21ksoftirqd/021:05:120
81610,0rcu_preempt3-21ksoftirqd/020:59:590
81610,0rcu_preempt3-21ksoftirqd/019:45:400
81610,0rcu_preempt19-21ksoftirqd/123:00:211
81600,0rcu_preempt3-21ksoftirqd/020:49:590
81590,0rcu_preempt3-21ksoftirqd/020:40:540
81560,0rcu_preempt3-21ksoftirqd/019:15:110
81560,0rcu_preempt19-21ksoftirqd/122:30:271
81560,0rcu_preempt19-21ksoftirqd/122:30:271
81540,0rcu_preempt19-21ksoftirqd/119:40:261
81540,0rcu_preempt11278-21kworker/1:022:52:441
81540,0rcu_preempt11278-21kworker/1:022:52:441
9950530,0irq/345-48484000-21swapper/120:15:191
81530,0rcu_preempt19-21ksoftirqd/100:25:561
81520,0rcu_preempt19-21ksoftirqd/119:59:591
81510,0rcu_preempt19-21ksoftirqd/120:30:151
81510,0rcu_preempt19-21ksoftirqd/119:55:151
81510,0rcu_preempt17622-21diskmemload23:15:321
81480,0rcu_preempt19-21ksoftirqd/121:40:251
81470,0rcu_preempt19-21ksoftirqd/121:27:181
81470,0rcu_preempt19-21ksoftirqd/119:50:151
81470,0rcu_preempt19-21ksoftirqd/119:10:151
81470,0rcu_preempt19-21ksoftirqd/119:10:151
81470,0rcu_preempt19-21ksoftirqd/119:09:591
81470,0rcu_preempt17622-21diskmemload22:01:551
81460,0rcu_preempt9714-21meminfo19:05:230
81460,0rcu_preempt19-21ksoftirqd/120:10:291
81460,0rcu_preempt19-21ksoftirqd/100:00:091
81450,0rcu_preempt21943-21df22:20:121
81450,0rcu_preempt19-21ksoftirqd/123:45:111
81450,0rcu_preempt19-21ksoftirqd/122:15:261
81450,0rcu_preempt19-21ksoftirqd/121:50:101
81450,0rcu_preempt11856-21awk20:50:221
10050450,0irq/346-484840021448-1kworker/1:0H00:35:241
81440,0rcu_preempt7643-21irqstats22:05:201
81440,0rcu_preempt19-21ksoftirqd/121:22:121
10050440,0irq/346-484840025693-21diskstats23:30:151
10050440,0irq/346-484840010983-1kworker/1:1H22:44:041
81430,0rcu_preempt21832-21taskset21:46:281
10050430,0irq/346-48484006135-21fschecks_time23:10:171
10050430,0irq/346-48484000-21swapper/100:12:061
81420,0rcu_preempt7124-21ls20:35:251
10050420,0irq/346-484840024571-21chrt21:16:111
10050420,0irq/346-48484000-21swapper/122:37:421
10050420,0irq/346-48484000-21swapper/121:35:191
9950410,0irq/345-484840018032-21runrttasks23:22:021
81410,0rcu_preempt1354-21apt-get20:20:061
81410,0rcu_preempt0-21swapper/121:14:121
10050410,0irq/346-484840023526-21dpkg22:55:091
10050410,0irq/346-48484000-21swapper/100:08:161
81400,0rcu_preempt30470-21ssh21:55:241
81400,0rcu_preempt19-21ksoftirqd/120:05:301
81400,0rcu_preempt0-21swapper/120:45:141
10050390,0irq/346-484840030190-21sh22:28:321
10050390,0irq/346-48484000-21swapper/100:17:451
81380,0rcu_preempt9480-21munin-node1
81380,0rcu_preempt19-21ksoftirqd/120:55:091
1699380,0migration/113044-21munin-node1
10050380,0irq/346-484840014032-21munin-node1
81370,0rcu_preempt19-21ksoftirqd/119:26:211
81370,0rcu_preempt19-21ksoftirqd/119:26:211
81370,0rcu_preempt18300-21ntpdc23:55:231
81360,0rcu_preempt19-21ksoftirqd/120:25:281
1699340,0migration/123426-21taskset19:46:261
10050340,0irq/346-48484000-21swapper/121:03:261
9950310,0irq/345-48484000-21swapper/121:05:121
81290,0rcu_preempt19-21ksoftirqd/120:40:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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