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2025-12-02 - 04:20

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 Tue Dec 02, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811090,0rcu_preempt19-21ksoftirqd/122:38:251
811050,0rcu_preempt19-21ksoftirqd/119:39:451
811030,0rcu_preempt19-21ksoftirqd/123:33:141
811000,0rcu_preempt751-21rngd23:14:541
81950,0rcu_preempt19-21ksoftirqd/121:49:411
81940,0rcu_preempt19-21ksoftirqd/100:29:061
81930,0rcu_preempt19-21ksoftirqd/122:13:561
81930,0rcu_preempt19-21ksoftirqd/100:33:201
81920,0rcu_preempt54-21kswapd022:19:401
81920,0rcu_preempt19-21ksoftirqd/100:38:121
81920,0rcu_preempt19-21ksoftirqd/100:24:071
81910,0rcu_preempt751-21rngd00:16:461
81910,0rcu_preempt19-21ksoftirqd/121:22:291
81910,0rcu_preempt19-21ksoftirqd/100:11:161
81900,0rcu_preempt19-21ksoftirqd/123:01:041
81890,0rcu_preempt19-21ksoftirqd/122:18:091
81890,0rcu_preempt0-21swapper/100:02:451
81880,0rcu_preempt19-21ksoftirqd/121:42:421
81870,0rcu_preempt54-21kswapd021:13:531
81870,0rcu_preempt19-21ksoftirqd/122:26:061
81870,0rcu_preempt0-21swapper/121:58:501
81860,0rcu_preempt19-21ksoftirqd/123:56:021
81860,0rcu_preempt19-21ksoftirqd/123:43:481
81860,0rcu_preempt19-21ksoftirqd/123:34:401
81860,0rcu_preempt19-21ksoftirqd/122:58:111
81860,0rcu_preempt19-21ksoftirqd/122:07:471
81850,0rcu_preempt19-21ksoftirqd/120:30:261
81840,0rcu_preempt54-21kswapd000:05:191
81830,0rcu_preempt19-21ksoftirqd/123:50:361
81820,0rcu_preempt19-21ksoftirqd/122:30:481
81820,0rcu_preempt19-21ksoftirqd/121:45:431
81820,0rcu_preempt19-21ksoftirqd/121:45:431
81820,0rcu_preempt0-21swapper/123:46:191
139872810,0sleep010050irq/346-484840020:03:500
81780,0rcu_preempt19-21ksoftirqd/120:06:491
81740,0rcu_preempt751-21rngd20:14:541
81740,0rcu_preempt17552-1kworker/1:1H21:35:481
81730,0rcu_preempt3-21ksoftirqd/023:44:240
81720,0rcu_preempt19-21ksoftirqd/123:28:551
81720,0rcu_preempt19-21ksoftirqd/121:24:441
81720,0rcu_preempt19-21ksoftirqd/121:24:441
81710,0rcu_preempt19-21ksoftirqd/119:36:451
81710,0rcu_preempt0-21swapper/122:45:341
81700,0rcu_preempt19-21ksoftirqd/122:49:481
81700,0rcu_preempt0-21swapper/123:13:011
81690,0rcu_preempt8512-21kworker/1:123:05:571
81690,0rcu_preempt19-21ksoftirqd/119:19:431
81690,0rcu_preempt12200-21ping20:03:391
81680,0rcu_preempt54-21kswapd000:35:160
81680,0rcu_preempt19-21ksoftirqd/119:29:421
81670,0rcu_preempt19-21ksoftirqd/119:44:541
81670,0rcu_preempt0-21swapper/122:40:511
268132670,0sleep09950irq/345-484840022:15:200
81660,0rcu_preempt19-21ksoftirqd/123:19:371
81660,0rcu_preempt19-21ksoftirqd/121:59:371
81660,0rcu_preempt0-21swapper/121:31:361
81650,0rcu_preempt0-21swapper/121:14:581
81640,0rcu_preempt3-21ksoftirqd/023:09:560
81630,0rcu_preempt19-21ksoftirqd/120:23:031
81630,0rcu_preempt19-21ksoftirqd/120:23:031
81620,0rcu_preempt54-21kswapd022:24:470
81620,0rcu_preempt3-21ksoftirqd/000:04:440
81620,0rcu_preempt27303-21apt-get20:44:381
81600,0rcu_preempt3-21ksoftirqd/000:14:400
81600,0rcu_preempt19-21ksoftirqd/120:57:251
139402600,0sleep09950irq/345-484840022:39:370
81590,0rcu_preempt19-21ksoftirqd/120:34:441
81590,0rcu_preempt19-21ksoftirqd/119:09:371
81580,0rcu_preempt3-21ksoftirqd/021:29:360
81580,0rcu_preempt10918-21apt-get19:54:381
203452580,0sleep010050irq/346-484840020:21:450
203452580,0sleep010050irq/346-484840020:21:450
81570,0rcu_preempt19-21ksoftirqd/119:25:081
56552570,0chrt9950irq/345-484840023:46:240
10050570,0irq/346-48484000-21swapper/021:54:590
81560,0rcu_preempt3-21ksoftirqd/022:49:440
81560,0rcu_preempt19-21ksoftirqd/120:39:441
81560,0rcu_preempt19-21ksoftirqd/120:25:311
81560,0rcu_preempt19-21ksoftirqd/120:13:071
81550,0rcu_preempt19-21ksoftirqd/119:14:491
81550,0rcu_preempt19-21ksoftirqd/119:14:491
81540,0rcu_preempt19-21ksoftirqd/120:59:551
56082540,0sleep09950irq/345-484840000:27:400
81530,0rcu_preempt3-21ksoftirqd/023:24:410
141912520,0sleep09950irq/345-484840021:22:130
10050520,0irq/346-484840028406-1kworker/0:1H22:59:560
10050520,0irq/346-484840021830-1kworker/0:0H00:09:580
10050520,0irq/346-48484000-21swapper/021:15:500
81510,0rcu_preempt3-21ksoftirqd/023:58:060
81510,0rcu_preempt2047-21memory21:04:491
10050510,0irq/346-4848400751-21rngd23:32:090
10050510,0irq/346-48484004379-1kworker/0:2H23:08:380
81500,0rcu_preempt54-21kswapd019:49:381
81490,0rcu_preempt3-21ksoftirqd/022:14:190
261412490,0sleep09950irq/345-484840021:36:120
193502490,0chrt9950irq/345-484840000:03:580
10050490,0irq/346-4848400751-21rngd22:38:240
81480,0rcu_preempt54-21kswapd022:21:050
81480,0rcu_preempt3-21ksoftirqd/021:44:470
81480,0rcu_preempt3-21ksoftirqd/021:44:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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