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2026-08-16 - 23:55

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun Aug 16, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811500,0rcu_preempt3-21ksoftirqd/007:45:210
811240,0rcu_preempt3-21ksoftirqd/007:31:440
811230,0rcu_preempt3-21ksoftirqd/007:21:030
811230,0rcu_preempt29844-21ps12:05:100
811210,0rcu_preempt3-21ksoftirqd/012:16:310
811170,0rcu_preempt3-21ksoftirqd/011:40:070
811080,0rcu_preempt3-21ksoftirqd/010:00:110
811080,0rcu_preempt3-21ksoftirqd/008:09:440
811070,0rcu_preempt3-21ksoftirqd/009:00:100
811060,0rcu_preempt3-21ksoftirqd/009:14:590
811020,0rcu_preempt3-21ksoftirqd/010:40:090
811020,0rcu_preempt3-21ksoftirqd/010:20:100
81970,0rcu_preempt3-21ksoftirqd/011:00:160
81960,0rcu_preempt3-21ksoftirqd/011:10:100
81950,0rcu_preempt3-21ksoftirqd/009:50:070
81950,0rcu_preempt28194-21ssh11:30:280
81940,0rcu_preempt3-21ksoftirqd/012:24:580
81940,0rcu_preempt3-21ksoftirqd/011:45:010
81940,0rcu_preempt3-21ksoftirqd/007:19:440
81930,0rcu_preempt3-21ksoftirqd/011:14:570
81920,0rcu_preempt3-21ksoftirqd/011:50:030
81920,0rcu_preempt3-21ksoftirqd/007:24:580
81900,0rcu_preempt10952-21ssh09:35:100
81890,0rcu_preempt3-21ksoftirqd/012:10:100
81880,0rcu_preempt3-21ksoftirqd/012:30:080
81880,0rcu_preempt3-21ksoftirqd/009:30:160
81870,0rcu_preempt3-21ksoftirqd/010:55:040
81870,0rcu_preempt19178-21sshd07:35:090
81860,0rcu_preempt9340-21munin-run10:39:440
81850,0rcu_preempt9119-21kworker/0:212:20:010
81840,0rcu_preempt17275-21diskmemload10:50:020
81810,0rcu_preempt30041-21dropbear09:55:000
81800,0rcu_preempt32628-21dropbear09:24:581
81800,0rcu_preempt3-21ksoftirqd/008:45:100
81790,0rcu_preempt3-21ksoftirqd/007:39:460
81770,0rcu_preempt3-21ksoftirqd/010:44:450
81770,0rcu_preempt3-21ksoftirqd/008:55:110
81770,0rcu_preempt0-21swapper/112:06:081
81760,0rcu_preempt3-21ksoftirqd/009:10:530
81760,0rcu_preempt3-21ksoftirqd/008:40:070
81760,0rcu_preempt0-21swapper/112:33:581
81750,0rcu_preempt3-21ksoftirqd/011:09:390
81750,0rcu_preempt3-21ksoftirqd/009:26:060
81740,0rcu_preempt3-21ksoftirqd/011:56:090
81740,0rcu_preempt3-21ksoftirqd/009:20:080
81740,0rcu_preempt26459-21ping08:20:081
81740,0rcu_preempt26459-21ping08:20:081
81730,0rcu_preempt3-21ksoftirqd/011:35:030
81730,0rcu_preempt3-21ksoftirqd/010:25:100
81730,0rcu_preempt3-21ksoftirqd/010:05:030
81730,0rcu_preempt3-21ksoftirqd/009:46:000
81730,0rcu_preempt3-21ksoftirqd/008:49:570
81720,0rcu_preempt3-21ksoftirqd/011:21:200
81720,0rcu_preempt3-21ksoftirqd/009:05:070
81720,0rcu_preempt17275-21diskmemload10:15:120
81710,0rcu_preempt19-21ksoftirqd/109:30:581
81700,0rcu_preempt3-21ksoftirqd/010:31:500
81700,0rcu_preempt3-21ksoftirqd/009:43:240
81700,0rcu_preempt3-21ksoftirqd/007:50:040
81690,0rcu_preempt3-21ksoftirqd/012:36:580
81690,0rcu_preempt3-21ksoftirqd/010:10:110
81690,0rcu_preempt3-21ksoftirqd/008:35:090
81670,0rcu_preempt3-21ksoftirqd/012:03:260
81670,0rcu_preempt3-21ksoftirqd/008:20:100
81670,0rcu_preempt3-21ksoftirqd/008:20:100
81670,0rcu_preempt2859-21diskstats08:25:010
81670,0rcu_preempt25096-21dropbear09:50:011
81670,0rcu_preempt19-21ksoftirqd/107:40:041
81670,0rcu_preempt0-21swapper/110:22:571
81650,0rcu_preempt3-21ksoftirqd/008:00:000
81640,0rcu_preempt3-21ksoftirqd/011:26:320
81640,0rcu_preempt3-21ksoftirqd/008:10:140
81640,0rcu_preempt31279-21kworker/1:111:37:451
81640,0rcu_preempt19-21ksoftirqd/111:24:451
81630,0rcu_preempt26459-21ping08:30:040
81630,0rcu_preempt26459-21ping08:30:040
81630,0rcu_preempt0-21swapper/109:47:581
81610,0rcu_preempt19-21ksoftirqd/109:19:451
81600,0rcu_preempt3-21ksoftirqd/008:17:260
81590,0rcu_preempt19-21ksoftirqd/109:40:111
81580,0rcu_preempt19-21ksoftirqd/111:10:131
81580,0rcu_preempt0-21swapper/108:35:041
81570,0rcu_preempt3-21ksoftirqd/007:09:440
81570,0rcu_preempt0-21swapper/111:31:361
81560,0rcu_preempt0-21swapper/110:50:201
81550,0rcu_preempt0-21swapper/111:55:541
81550,0rcu_preempt0-21swapper/111:23:591
81550,0rcu_preempt0-21swapper/111:01:451
81550,0rcu_preempt0-21swapper/110:36:531
81540,0rcu_preempt25199-21apt-get07:54:550
81540,0rcu_preempt19-21ksoftirqd/111:16:011
81540,0rcu_preempt0-21swapper/109:18:301
81520,0rcu_preempt836-21rngd12:12:111
81520,0rcu_preempt0-21swapper/109:58:021
81510,0rcu_preempt3-21ksoftirqd/007:10:070
81500,0rcu_preempt0-21swapper/112:35:481
3217325010,0sleep132266-21df10:29:561
81480,0rcu_preempt19-21ksoftirqd/110:46:101
81480,0rcu_preempt19-21ksoftirqd/110:10:121
81480,0rcu_preempt19-21ksoftirqd/108:19:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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