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2026-08-26 - 13:01

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 Wed Aug 26, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811420,0rcu_preempt14170-1kworker/1:2H23:50:041
811380,0rcu_preempt19-21ksoftirqd/119:35:021
811310,0rcu_preempt19-21ksoftirqd/123:35:031
811270,0rcu_preempt19-21ksoftirqd/119:25:051
811230,0rcu_preempt31826-21apt-get00:04:481
811210,0rcu_preempt19-21ksoftirqd/121:59:491
811170,0rcu_preempt19-21ksoftirqd/122:39:341
811170,0rcu_preempt19-21ksoftirqd/122:39:341
811170,0rcu_preempt19-21ksoftirqd/121:39:561
811150,0rcu_preempt13948-21cyclictest19:30:001
811130,0rcu_preempt19-21ksoftirqd/121:34:361
811120,0rcu_preempt20238-1kworker/1:2H21:45:001
811100,0rcu_preempt19-21ksoftirqd/121:54:571
811080,0rcu_preempt19-21ksoftirqd/123:39:551
811070,0rcu_preempt19-21ksoftirqd/122:29:471
811060,0rcu_preempt19-21ksoftirqd/123:54:471
811040,0rcu_preempt3-21ksoftirqd/021:40:460
811040,0rcu_preempt19-21ksoftirqd/123:28:411
811020,0rcu_preempt19-21ksoftirqd/123:45:021
811020,0rcu_preempt19-21ksoftirqd/119:19:471
811000,0rcu_preempt3-21ksoftirqd/022:45:030
811000,0rcu_preempt3-21ksoftirqd/022:45:030
811000,0rcu_preempt19-21ksoftirqd/119:44:361
81990,0rcu_preempt19-21ksoftirqd/121:14:331
81990,0rcu_preempt19-21ksoftirqd/119:39:361
81990,0rcu_preempt19-21ksoftirqd/100:25:131
81970,0rcu_preempt19-21ksoftirqd/120:00:051
81960,0rcu_preempt19-21ksoftirqd/120:05:021
81960,0rcu_preempt19-21ksoftirqd/100:34:351
81950,0rcu_preempt3-21ksoftirqd/022:59:360
81950,0rcu_preempt19-21ksoftirqd/123:17:531
81950,0rcu_preempt19-21ksoftirqd/100:09:481
81940,0rcu_preempt19-21ksoftirqd/122:58:231
81940,0rcu_preempt19-21ksoftirqd/121:27:501
81930,0rcu_preempt3-21ksoftirqd/023:24:510
81920,0rcu_preempt19-21ksoftirqd/121:54:331
81920,0rcu_preempt19-21ksoftirqd/120:40:031
81920,0rcu_preempt19-21ksoftirqd/100:04:351
81900,0rcu_preempt19-21ksoftirqd/100:39:351
81890,0rcu_preempt19-21ksoftirqd/122:49:351
81890,0rcu_preempt19-21ksoftirqd/122:49:351
81890,0rcu_preempt19-21ksoftirqd/122:14:481
81870,0rcu_preempt3-21ksoftirqd/021:11:300
81870,0rcu_preempt3-21ksoftirqd/000:24:500
81870,0rcu_preempt19-21ksoftirqd/122:59:371
81870,0rcu_preempt19-21ksoftirqd/122:04:511
81860,0rcu_preempt19-21ksoftirqd/100:24:361
81850,0rcu_preempt19-21ksoftirqd/122:49:541
81850,0rcu_preempt19-21ksoftirqd/120:35:011
81850,0rcu_preempt19-21ksoftirqd/100:15:061
81850,0rcu_preempt13404-21munin-node1
81840,0rcu_preempt3-21ksoftirqd/023:39:530
81840,0rcu_preempt19-21ksoftirqd/123:10:001
81820,0rcu_preempt19-21ksoftirqd/123:20:021
81810,0rcu_preempt3-21ksoftirqd/022:29:550
81810,0rcu_preempt3-21ksoftirqd/021:34:460
81810,0rcu_preempt3-21ksoftirqd/021:34:460
81810,0rcu_preempt19-21ksoftirqd/119:19:361
81800,0rcu_preempt19-21ksoftirqd/122:19:571
81790,0rcu_preempt836-21rngd22:14:351
81790,0rcu_preempt3-21ksoftirqd/023:29:580
81790,0rcu_preempt3-21ksoftirqd/023:05:120
81790,0rcu_preempt19-21ksoftirqd/120:55:061
81790,0rcu_preempt19-21ksoftirqd/120:49:351
81780,0rcu_preempt3-21ksoftirqd/022:14:540
81780,0rcu_preempt19-21ksoftirqd/123:30:411
81780,0rcu_preempt12552-1kworker/0:3H22:40:030
81770,0rcu_preempt3-21ksoftirqd/022:22:460
81770,0rcu_preempt19-21ksoftirqd/123:05:261
81770,0rcu_preempt19-21ksoftirqd/120:19:541
81770,0rcu_preempt19-21ksoftirqd/120:14:351
81760,0rcu_preempt19-21ksoftirqd/121:19:251
81740,0rcu_preempt19-21ksoftirqd/121:05:031
81740,0rcu_preempt19-21ksoftirqd/120:34:351
81730,0rcu_preempt19-21ksoftirqd/121:34:491
81730,0rcu_preempt19-21ksoftirqd/121:34:491
81720,0rcu_preempt3-21ksoftirqd/022:39:350
81720,0rcu_preempt3-21ksoftirqd/022:39:350
81720,0rcu_preempt3-21ksoftirqd/021:51:210
81710,0rcu_preempt3-21ksoftirqd/000:34:360
81710,0rcu_preempt20930-21diskmemload23:35:020
81700,0rcu_preempt836-21rngd00:01:380
81700,0rcu_preempt3-21ksoftirqd/021:15:450
81680,0rcu_preempt3-21ksoftirqd/000:20:240
81680,0rcu_preempt19-21ksoftirqd/119:54:571
81670,0rcu_preempt3-21ksoftirqd/000:09:540
81670,0rcu_preempt19-21ksoftirqd/122:25:011
81660,0rcu_preempt3-21ksoftirqd/023:14:530
81660,0rcu_preempt3-21ksoftirqd/022:25:000
81660,0rcu_preempt19-21ksoftirqd/121:19:551
81660,0rcu_preempt19-21ksoftirqd/120:09:361
81650,0rcu_preempt3-21ksoftirqd/023:09:560
81650,0rcu_preempt3-21ksoftirqd/000:30:260
81650,0rcu_preempt19-21ksoftirqd/119:09:351
81630,0rcu_preempt3-21ksoftirqd/019:54:540
81620,0rcu_preempt19-21ksoftirqd/120:29:351
81600,0rcu_preempt3-21ksoftirqd/022:03:180
81600,0rcu_preempt3-21ksoftirqd/021:24:560
81600,0rcu_preempt22874-21idleruntime22:49:530
81580,0rcu_preempt3-21ksoftirqd/022:14:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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