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2026-06-24 - 05:07

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 Wed Jun 24, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811220,0rcu_preempt19-21ksoftirqd/100:04:531
811070,0rcu_preempt3-21ksoftirqd/021:52:140
811070,0rcu_preempt3-21ksoftirqd/021:52:140
811030,0rcu_preempt30844-21ssh22:27:491
811010,0rcu_preempt16724-21idleruntime-cro21:07:221
81940,0rcu_preempt19-21ksoftirqd/123:28:511
81920,0rcu_preempt3-21ksoftirqd/022:47:390
81860,0rcu_preempt0-21swapper/122:38:501
10050840,0irq/346-484840029145-1kworker/0:3H23:04:120
81820,0rcu_preempt19-21ksoftirqd/119:22:271
81790,0rcu_preempt3-21ksoftirqd/023:37:260
9950770,0irq/345-4848400111rcuc/023:46:390
9950770,0irq/345-4848400111rcuc/023:46:390
81720,0rcu_preempt19-21ksoftirqd/120:07:221
81720,0rcu_preempt0-21swapper/121:29:451
81710,0rcu_preempt3-21ksoftirqd/022:12:520
81710,0rcu_preempt19-21ksoftirqd/122:12:431
81700,0rcu_preempt3-21ksoftirqd/021:47:060
81700,0rcu_preempt3-21ksoftirqd/021:12:260
81690,0rcu_preempt19-21ksoftirqd/100:08:161
81670,0rcu_preempt19-21ksoftirqd/121:12:441
81650,0rcu_preempt19-21ksoftirqd/123:22:471
81650,0rcu_preempt19-21ksoftirqd/121:24:511
81630,0rcu_preempt3-21ksoftirqd/021:52:510
81630,0rcu_preempt3-21ksoftirqd/000:24:540
81630,0rcu_preempt19-21ksoftirqd/122:03:491
81610,0rcu_preempt19-21ksoftirqd/100:25:151
81600,0rcu_preempt19-21ksoftirqd/122:07:491
81580,0rcu_preempt19-21ksoftirqd/122:47:471
81570,0rcu_preempt3-21ksoftirqd/022:22:370
81570,0rcu_preempt3-21ksoftirqd/020:42:400
81570,0rcu_preempt19-21ksoftirqd/119:57:511
81570,0rcu_preempt19-21ksoftirqd/100:17:351
9950560,0irq/345-4848400171rcuc/121:17:471
81560,0rcu_preempt54-21kswapd020:52:391
81560,0rcu_preempt54-21kswapd020:52:391
81560,0rcu_preempt3-21ksoftirqd/023:12:340
81560,0rcu_preempt3-21ksoftirqd/022:52:460
81560,0rcu_preempt3-21ksoftirqd/000:32:330
81550,0rcu_preempt3-21ksoftirqd/023:32:420
81550,0rcu_preempt3-21ksoftirqd/020:27:350
81550,0rcu_preempt19-21ksoftirqd/123:52:541
81540,0rcu_preempt3-21ksoftirqd/022:11:280
81540,0rcu_preempt25884-21ping20:18:440
81540,0rcu_preempt19-21ksoftirqd/123:46:131
81540,0rcu_preempt19-21ksoftirqd/123:46:131
81540,0rcu_preempt19-21ksoftirqd/123:08:371
10250540,0irq/333-mmc07689-21ssh22:37:390
81530,0rcu_preempt3-21ksoftirqd/023:31:470
81530,0rcu_preempt3-21ksoftirqd/023:24:580
81530,0rcu_preempt3-21ksoftirqd/023:07:410
81530,0rcu_preempt3-21ksoftirqd/021:27:570
10050530,0irq/346-484840011114-1kworker/0:0H21:36:470
9950520,0irq/345-4848400181ktimersoftd/122:25:451
9950520,0irq/345-4848400171rcuc/123:19:241
81520,0rcu_preempt6202-21kworker/0:022:05:500
81520,0rcu_preempt54-21kswapd000:27:391
81520,0rcu_preempt3-21ksoftirqd/023:59:570
81520,0rcu_preempt3-21ksoftirqd/022:18:410
81520,0rcu_preempt3-21ksoftirqd/020:37:380
81520,0rcu_preempt3-21ksoftirqd/000:12:490
81520,0rcu_preempt3-21ksoftirqd/000:07:570
81520,0rcu_preempt29070-21irqstats21:52:471
81510,0rcu_preempt54-21kswapd000:32:341
81510,0rcu_preempt3-21ksoftirqd/000:17:360
81510,0rcu_preempt21339-21kworker/0:121:57:530
81510,0rcu_preempt19-21ksoftirqd/123:34:191
81510,0rcu_preempt19-21ksoftirqd/123:12:511
81510,0rcu_preempt19-21ksoftirqd/122:32:341
81510,0rcu_preempt10302-21apt-get20:47:340
81500,0rcu_preempt3-21ksoftirqd/022:57:320
81500,0rcu_preempt3-21ksoftirqd/022:32:460
81500,0rcu_preempt3-21ksoftirqd/022:27:520
81500,0rcu_preempt3-21ksoftirqd/021:25:300
81500,0rcu_preempt3-21ksoftirqd/020:12:430
81500,0rcu_preempt25884-21ping20:02:220
81500,0rcu_preempt19-21ksoftirqd/122:42:331
81500,0rcu_preempt19-21ksoftirqd/121:45:271
81500,0rcu_preempt19-21ksoftirqd/120:12:311
81500,0rcu_preempt19-21ksoftirqd/100:01:591
81500,0rcu_preempt14222-21ssh23:50:580
81500,0rcu_preempt12587-21kworker/0:221:37:440
81490,0rcu_preempt54-21kswapd022:53:571
81490,0rcu_preempt3-21ksoftirqd/023:52:370
81490,0rcu_preempt3-21ksoftirqd/023:20:510
81490,0rcu_preempt3-21ksoftirqd/021:17:340
81490,0rcu_preempt3-21ksoftirqd/020:32:390
81490,0rcu_preempt3-21ksoftirqd/020:32:390
81490,0rcu_preempt3-21ksoftirqd/020:11:010
81490,0rcu_preempt3-21ksoftirqd/019:52:390
81490,0rcu_preempt3-21ksoftirqd/019:12:020
81490,0rcu_preempt3-21ksoftirqd/019:02:420
81490,0rcu_preempt3-21ksoftirqd/000:07:230
81490,0rcu_preempt19-21ksoftirqd/120:07:461
81490,0rcu_preempt19-21ksoftirqd/119:17:421
81490,0rcu_preempt14169-21meminfo20:57:441
81480,0rcu_preempt3-21ksoftirqd/022:46:470
81480,0rcu_preempt3-21ksoftirqd/021:07:400
81480,0rcu_preempt3-21ksoftirqd/019:12:400
81480,0rcu_preempt19-21ksoftirqd/123:37:241
81480,0rcu_preempt19-21ksoftirqd/123:01:071
81470,0rcu_preempt54-21kswapd021:57:481
81470,0rcu_preempt3-21ksoftirqd/020:06:310
81470,0rcu_preempt3-21ksoftirqd/000:28:280
81470,0rcu_preempt19-21ksoftirqd/123:47:461
81470,0rcu_preempt19-21ksoftirqd/122:17:591
81470,0rcu_preempt19-21ksoftirqd/120:47:411
81470,0rcu_preempt19-21ksoftirqd/120:17:571
81470,0rcu_preempt13011-21ping19:22:360
81460,0rcu_preempt19-21ksoftirqd/120:22:411
81460,0rcu_preempt19-21ksoftirqd/119:17:241
81460,0rcu_preempt19-21ksoftirqd/100:12:401
81460,0rcu_preempt13011-21ping19:42:441
81450,0rcu_preempt3-21ksoftirqd/021:03:290
81450,0rcu_preempt19-21ksoftirqd/123:02:491
81450,0rcu_preempt19-21ksoftirqd/121:48:061
81450,0rcu_preempt19-21ksoftirqd/121:48:061
81450,0rcu_preempt19-21ksoftirqd/121:32:441
81450,0rcu_preempt19-21ksoftirqd/119:52:371
81450,0rcu_preempt19-21ksoftirqd/119:37:561
81450,0rcu_preempt19-21ksoftirqd/119:33:321
81450,0rcu_preempt19-21ksoftirqd/119:30:401
81440,0rcu_preempt54-21kswapd021:09:591
81440,0rcu_preempt19-21ksoftirqd/120:32:341
81440,0rcu_preempt19-21ksoftirqd/120:32:341
81440,0rcu_preempt19-21ksoftirqd/120:27:361
81430,0rcu_preempt3-21ksoftirqd/020:22:560
81430,0rcu_preempt19-21ksoftirqd/121:39:541
81420,0rcu_preempt9233-21memory20:42:441
81420,0rcu_preempt3-21ksoftirqd/020:57:400
81420,0rcu_preempt23209-21diskstats19:47:370
81410,0rcu_preempt3-21ksoftirqd/019:27:590
81410,0rcu_preempt3-21ksoftirqd/019:17:340
81410,0rcu_preempt19-21ksoftirqd/120:37:501
81400,0rcu_preempt7807-1kworker/1:3H19:02:561
81400,0rcu_preempt3-21ksoftirqd/020:53:150
81400,0rcu_preempt3-21ksoftirqd/020:53:150
81400,0rcu_preempt3-21ksoftirqd/019:46:000
81380,0rcu_preempt3-21ksoftirqd/019:32:360
81380,0rcu_preempt19-21ksoftirqd/119:11:291
972999361,0cyclictest13011-21ping19:37:390
81360,0rcu_preempt19-21ksoftirqd/119:51:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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