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2026-07-12 - 01:23

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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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 Jul 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050670,0irq/346-484840054-21kswapd012:17:540
81660,0rcu_preempt0-21swapper/111:39:451
81650,0rcu_preempt3-21ksoftirqd/011:57:250
10050650,0irq/346-484840012289-1kworker/0:1H11:02:440
81630,0rcu_preempt3-21ksoftirqd/011:41:230
81620,0rcu_preempt3-21ksoftirqd/008:52:220
81620,0rcu_preempt19-21ksoftirqd/109:22:271
81610,0rcu_preempt3-21ksoftirqd/010:57:310
81610,0rcu_preempt3-21ksoftirqd/009:52:180
81600,0rcu_preempt30521-21diskmemload11:20:301
81600,0rcu_preempt19-21ksoftirqd/108:12:071
81590,0rcu_preempt3-21ksoftirqd/008:07:060
81590,0rcu_preempt3-21ksoftirqd/008:07:060
81590,0rcu_preempt30521-21diskmemload09:27:240
10050590,0irq/346-484840054-21kswapd010:28:561
81580,0rcu_preempt3-21ksoftirqd/012:12:250
81580,0rcu_preempt3-21ksoftirqd/011:47:230
81580,0rcu_preempt3-21ksoftirqd/011:47:230
81580,0rcu_preempt3-21ksoftirqd/011:07:290
81580,0rcu_preempt3-21ksoftirqd/010:37:060
81570,0rcu_preempt7337-21ping08:17:240
10050570,0irq/346-484840054-21kswapd012:12:060
81560,0rcu_preempt3-21ksoftirqd/012:33:270
81560,0rcu_preempt3-21ksoftirqd/012:22:220
81560,0rcu_preempt3-21ksoftirqd/011:17:170
81550,0rcu_preempt3-21ksoftirqd/011:56:420
81550,0rcu_preempt3-21ksoftirqd/010:42:370
81550,0rcu_preempt3015-21meminfo11:22:310
81540,0rcu_preempt3-21ksoftirqd/010:14:050
81540,0rcu_preempt3-21ksoftirqd/009:17:170
81540,0rcu_preempt3-21ksoftirqd/009:07:180
23523995423,0cyclictest12435-21forks11:32:240
81530,0rcu_preempt3-21ksoftirqd/010:32:280
81530,0rcu_preempt3-21ksoftirqd/009:12:250
81530,0rcu_preempt3-21ksoftirqd/008:22:460
81530,0rcu_preempt3-21ksoftirqd/007:46:180
81530,0rcu_preempt19-21ksoftirqd/111:32:261
81520,0rcu_preempt5104-21irqstats11:57:281
81520,0rcu_preempt3-21ksoftirqd/012:27:270
81520,0rcu_preempt3-21ksoftirqd/012:02:230
81520,0rcu_preempt3-21ksoftirqd/011:42:350
81520,0rcu_preempt3-21ksoftirqd/008:27:300
81520,0rcu_preempt19-21ksoftirqd/110:33:521
322412520,0chrt9950irq/345-484840009:41:251
2352399528,0cyclictest629950ssh10:20:360
10050520,0irq/346-484840010277-21ssh10:57:231
81510,0rcu_preempt3-21ksoftirqd/011:12:270
81510,0rcu_preempt3-21ksoftirqd/009:47:220
81510,0rcu_preempt3-21ksoftirqd/009:37:260
81510,0rcu_preempt3-21ksoftirqd/008:02:330
23523995116,0cyclictest0-21swapper/010:47:160
81500,0rcu_preempt3-21ksoftirqd/010:27:200
81500,0rcu_preempt3-21ksoftirqd/010:02:060
81500,0rcu_preempt3-21ksoftirqd/009:22:270
81500,0rcu_preempt3-21ksoftirqd/007:52:280
81500,0rcu_preempt3-21ksoftirqd/007:07:290
81500,0rcu_preempt21043-21meminfo10:02:290
10050500,0irq/346-484840054-21kswapd011:28:210
10050500,0irq/346-48484004649-1kworker/1:3H11:30:061
10050500,0irq/346-484840032163-1kworker/1:0H11:23:311
9950490,0irq/345-484840016878-1kworker/1:1H12:10:221
81490,0rcu_preempt3-21ksoftirqd/010:12:060
81490,0rcu_preempt19-21ksoftirqd/111:52:531
81490,0rcu_preempt19-21ksoftirqd/110:07:291
10050490,0irq/346-484840025262-1kworker/1:2H09:36:571
10050490,0irq/346-48484002461-21ssh10:17:051
81480,0rcu_preempt3-21ksoftirqd/010:23:460
81480,0rcu_preempt3-21ksoftirqd/009:02:330
81480,0rcu_preempt3-21ksoftirqd/007:02:230
81480,0rcu_preempt19-21ksoftirqd/112:22:331
81480,0rcu_preempt19-21ksoftirqd/107:52:171
81480,0rcu_preempt15635-21sendmail-mta09:12:581
81480,0rcu_preempt0-21swapper/107:38:581
9950470,0irq/345-484840021984-21ssh11:42:121
81470,0rcu_preempt3-21ksoftirqd/009:42:270
81470,0rcu_preempt3-21ksoftirqd/007:47:210
81470,0rcu_preempt19-21ksoftirqd/108:02:371
81470,0rcu_preempt19-21ksoftirqd/107:42:371
81470,0rcu_preempt19-21ksoftirqd/107:22:161
81470,0rcu_preempt16211-21tr09:57:301
81470,0rcu_preempt0-21swapper/108:52:181
10050470,0irq/346-48484005445-1kworker/1:3H09:19:391
9950460,0irq/345-48484004225-1kworker/1:3H12:30:361
81460,0rcu_preempt3-21ksoftirqd/009:33:120
81460,0rcu_preempt30521-21diskmemload12:20:241
81460,0rcu_preempt27396-21apt-get08:57:160
81460,0rcu_preempt27396-21apt-get08:57:160
81460,0rcu_preempt24100-21apt-get08:47:160
81460,0rcu_preempt19-21ksoftirqd/110:47:351
81460,0rcu_preempt19-21ksoftirqd/108:22:161
10050460,0irq/346-48484006414-21ssh10:52:500
10050460,0irq/346-48484006414-21ssh10:52:500
10050460,0irq/346-484840022567-1kworker/1:1H10:06:401
81450,0rcu_preempt3-21ksoftirqd/008:34:260
81450,0rcu_preempt26800-21ping07:37:170
81450,0rcu_preempt19-21ksoftirqd/111:49:351
81450,0rcu_preempt19-21ksoftirqd/111:49:351
81450,0rcu_preempt19-21ksoftirqd/109:07:211
81450,0rcu_preempt19-21ksoftirqd/107:32:291
81450,0rcu_preempt19-21ksoftirqd/107:17:071
10050450,0irq/346-484840054-21kswapd012:16:221
10050450,0irq/346-484840024888-1kworker/1:1H10:43:381
10050450,0irq/346-484840024767-21ssh10:38:491
10050450,0irq/346-484840021852-21ssh11:08:331
81440,0rcu_preempt6072-21ssh09:47:261
81440,0rcu_preempt3-21ksoftirqd/008:12:300
81440,0rcu_preempt19-21ksoftirqd/112:02:231
81440,0rcu_preempt19-21ksoftirqd/109:45:201
81440,0rcu_preempt19-21ksoftirqd/107:57:311
81440,0rcu_preempt19-21ksoftirqd/107:27:291
10050440,0irq/346-484840032090-21diskstats07:32:250
81430,0rcu_preempt3-21ksoftirqd/007:57:280
81430,0rcu_preempt3-21ksoftirqd/007:12:310
81430,0rcu_preempt19-21ksoftirqd/111:15:351
81430,0rcu_preempt19-21ksoftirqd/110:17:221
81430,0rcu_preempt19-21ksoftirqd/109:28:441
81430,0rcu_preempt0-21swapper/108:27:281
81420,0rcu_preempt26800-21ping07:17:051
81420,0rcu_preempt19-21ksoftirqd/111:03:381
81420,0rcu_preempt19-21ksoftirqd/110:52:171
81420,0rcu_preempt19-21ksoftirqd/110:52:171
81420,0rcu_preempt19-21ksoftirqd/110:25:291
81420,0rcu_preempt19-21ksoftirqd/108:42:211
81420,0rcu_preempt19-21ksoftirqd/108:07:331
81420,0rcu_preempt19-21ksoftirqd/108:07:331
81420,0rcu_preempt14247-21apt-get08:17:161
81420,0rcu_preempt0-21swapper/108:57:311
81420,0rcu_preempt0-21swapper/108:57:311
315992420,0chrt10050irq/346-484840007:30:550
2352399427,0cyclictest0-21swapper/008:42:340
10050420,0irq/346-484840012682-1kworker/1:3H09:54:011
81410,0rcu_preempt19-21ksoftirqd/112:33:481
81410,0rcu_preempt19-21ksoftirqd/108:47:181
81400,0rcu_preempt19-21ksoftirqd/109:02:171
81400,0rcu_preempt19-21ksoftirqd/108:32:161
81400,0rcu_preempt19-21ksoftirqd/107:47:171
81400,0rcu_preempt0-21swapper/008:41:190
23523994014,0cyclictest26800-21ping07:17:180
81390,0rcu_preempt3-21ksoftirqd/007:24:120
81390,0rcu_preempt19-21ksoftirqd/108:37:161
81390,0rcu_preempt19-21ksoftirqd/107:07:171
9950350,0irq/345-48484000-21swapper/107:02:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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