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2026-06-20 - 19:41

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 Jun 20, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
100501090,0irq/346-484840026564-1kworker/0:1H10:18:070
81970,0rcu_preempt19-21ksoftirqd/111:41:431
81960,0rcu_preempt54-21kswapd008:57:491
81920,0rcu_preempt19-21ksoftirqd/112:27:361
10050810,0irq/346-484840012363-1kworker/0:1H09:11:510
81800,0rcu_preempt25779-21ssh12:07:220
81750,0rcu_preempt54-21kswapd009:35:211
81750,0rcu_preempt3-21ksoftirqd/012:01:080
81730,0rcu_preempt19-21ksoftirqd/111:17:471
81720,0rcu_preempt20211-21kworker/1:109:24:041
81710,0rcu_preempt3-21ksoftirqd/010:34:170
81710,0rcu_preempt3-21ksoftirqd/010:22:430
81700,0rcu_preempt3-21ksoftirqd/012:17:060
81700,0rcu_preempt3-21ksoftirqd/011:40:490
10050700,0irq/346-48484000-21swapper/010:09:170
81690,0rcu_preempt3-21ksoftirqd/008:42:530
9950680,0irq/345-48484000-21swapper/009:16:190
81680,0rcu_preempt3-21ksoftirqd/010:46:300
81680,0rcu_preempt19-21ksoftirqd/110:12:411
9950670,0irq/345-48484000-21swapper/011:08:150
9950670,0irq/345-48484000-21swapper/011:03:530
81670,0rcu_preempt19-21ksoftirqd/112:35:211
81670,0rcu_preempt19-21ksoftirqd/112:35:211
81670,0rcu_preempt19-21ksoftirqd/109:44:571
10050670,0irq/346-48484000-21swapper/009:29:180
9950660,0irq/345-48484000-21swapper/009:17:530
10050650,0irq/346-48484009057-21ssh09:38:550
9950640,0irq/345-48484009548-21diskmemload09:35:430
9950640,0irq/345-48484000-21swapper/009:25:390
10050640,0irq/346-48484000-21swapper/010:00:100
10050640,0irq/346-48484000-21swapper/010:00:100
9950630,0irq/345-48484000-21swapper/011:02:190
9950620,0irq/345-48484000-21swapper/011:42:280
81620,0rcu_preempt19-21ksoftirqd/112:13:571
81620,0rcu_preempt19-21ksoftirqd/110:01:081
81620,0rcu_preempt19-21ksoftirqd/110:01:081
10050620,0irq/346-48484000-21swapper/011:36:510
9950610,0irq/345-48484000-21swapper/011:28:360
81610,0rcu_preempt3-21ksoftirqd/007:57:390
81610,0rcu_preempt3-21ksoftirqd/007:57:390
81600,0rcu_preempt9850-21kworker/0:007:32:390
81600,0rcu_preempt3-21ksoftirqd/008:12:460
81590,0rcu_preempt54-21kswapd010:53:541
81590,0rcu_preempt3-21ksoftirqd/007:07:370
81590,0rcu_preempt3-21ksoftirqd/007:07:370
81590,0rcu_preempt19-21ksoftirqd/111:59:531
81590,0rcu_preempt19-21ksoftirqd/111:30:081
81590,0rcu_preempt19-21ksoftirqd/108:17:171
9950580,0irq/345-48484000-21swapper/009:53:500
81580,0rcu_preempt8299-21kworker/0:010:29:070
81570,0rcu_preempt9548-21diskmemload10:32:311
81570,0rcu_preempt18743-21ping08:02:380
81570,0rcu_preempt1067-21lighttpd07:02:371
81560,0rcu_preempt19-21ksoftirqd/112:24:371
81560,0rcu_preempt19-21ksoftirqd/110:51:241
81560,0rcu_preempt19-21ksoftirqd/108:07:581
81560,0rcu_preempt19-21ksoftirqd/108:07:581
81550,0rcu_preempt3-21ksoftirqd/011:26:530
81550,0rcu_preempt3-21ksoftirqd/010:37:480
81550,0rcu_preempt3-21ksoftirqd/010:14:230
81550,0rcu_preempt3-21ksoftirqd/008:57:410
81550,0rcu_preempt0-21swapper/109:53:501
81540,0rcu_preempt4302-21diskstats11:12:410
81540,0rcu_preempt3-21ksoftirqd/009:42:440
81540,0rcu_preempt3-21ksoftirqd/008:07:420
81540,0rcu_preempt3-21ksoftirqd/008:07:420
81540,0rcu_preempt19-21ksoftirqd/109:28:181
10050540,0irq/346-48484005111-21ssh12:18:130
81530,0rcu_preempt3-21ksoftirqd/009:48:570
81530,0rcu_preempt2131-21ntp_states11:42:481
81530,0rcu_preempt19-21ksoftirqd/112:17:531
81530,0rcu_preempt19-21ksoftirqd/107:26:451
81520,0rcu_preempt3-21ksoftirqd/012:27:540
81510,0rcu_preempt851-21rngd09:51:201
81510,0rcu_preempt6565-21taskset11:47:430
81510,0rcu_preempt3-21ksoftirqd/011:17:450
81510,0rcu_preempt19-21ksoftirqd/111:07:371
81510,0rcu_preempt18779-21kworker/0:107:57:040
81500,0rcu_preempt3-21ksoftirqd/010:47:520
81500,0rcu_preempt19-21ksoftirqd/109:19:111
81500,0rcu_preempt19-21ksoftirqd/108:19:441
81500,0rcu_preempt18743-21ping07:55:461
81500,0rcu_preempt12549-21ssh11:53:011
10050500,0irq/346-484840054-21kswapd011:52:480
10050500,0irq/346-48484001556-21munin-node0
81490,0rcu_preempt3-21ksoftirqd/012:10:390
81490,0rcu_preempt3-21ksoftirqd/010:04:300
81490,0rcu_preempt3-21ksoftirqd/008:32:470
81490,0rcu_preempt3-21ksoftirqd/008:24:530
81490,0rcu_preempt3-21ksoftirqd/008:21:310
81490,0rcu_preempt19-21ksoftirqd/110:22:471
81490,0rcu_preempt19-21ksoftirqd/107:32:481
10050490,0irq/346-48484002614-1kworker/0:1H08:47:410
10050490,0irq/346-484840013599-1kworker/0:1H10:53:470
9950470,0irq/345-484840028260-1kworker/1:2H12:11:341
81470,0rcu_preempt54-21kswapd012:36:140
81470,0rcu_preempt54-21kswapd012:36:140
81470,0rcu_preempt19-21ksoftirqd/110:42:271
81470,0rcu_preempt19-21ksoftirqd/110:17:531
81470,0rcu_preempt19-21ksoftirqd/110:04:231
81470,0rcu_preempt19-21ksoftirqd/108:02:511
81470,0rcu_preempt19-21ksoftirqd/107:42:341
81460,0rcu_preempt3-21ksoftirqd/012:22:370
81460,0rcu_preempt3-21ksoftirqd/008:52:420
81460,0rcu_preempt3-21ksoftirqd/007:22:380
81460,0rcu_preempt19-21ksoftirqd/111:22:481
81460,0rcu_preempt19-21ksoftirqd/110:58:111
81460,0rcu_preempt19-21ksoftirqd/108:22:551
81460,0rcu_preempt19-21ksoftirqd/107:27:391
81460,0rcu_preempt19-21ksoftirqd/107:21:241
81460,0rcu_preempt15846-21apt-get07:47:360
81450,0rcu_preempt19-21ksoftirqd/111:32:431
81450,0rcu_preempt19-21ksoftirqd/108:50:111
81450,0rcu_preempt19-21ksoftirqd/108:37:371
81450,0rcu_preempt19-21ksoftirqd/107:47:501
81450,0rcu_preempt19-21ksoftirqd/107:40:441
10050450,0irq/346-48484009574-21sort09:07:270
81440,0rcu_preempt3-21ksoftirqd/008:37:420
81440,0rcu_preempt19-21ksoftirqd/111:12:391
81440,0rcu_preempt19-21ksoftirqd/109:16:241
81430,0rcu_preempt3-21ksoftirqd/007:12:260
81430,0rcu_preempt19-21ksoftirqd/112:05:031
81430,0rcu_preempt19-21ksoftirqd/111:02:491
81430,0rcu_preempt19-21ksoftirqd/110:27:491
81430,0rcu_preempt19-21ksoftirqd/109:38:281
81430,0rcu_preempt19-21ksoftirqd/109:07:491
81420,0rcu_preempt9548-21diskmemload10:37:471
81420,0rcu_preempt19-21ksoftirqd/111:47:521
81420,0rcu_preempt19-21ksoftirqd/110:07:551
81420,0rcu_preempt19-21ksoftirqd/108:27:451
81420,0rcu_preempt19-21ksoftirqd/107:58:401
81420,0rcu_preempt19-21ksoftirqd/107:58:401
10050420,0irq/346-48484003-21ksoftirqd/007:37:460
81410,0rcu_preempt6615-21missed_timers07:17:540
10050410,0irq/346-48484005847-21ping07:27:450
10050410,0irq/346-484840029407-21if_eth108:27:450
81400,0rcu_preempt31191-21memory08:32:491
81400,0rcu_preempt19-21ksoftirqd/107:16:201
10050400,0irq/346-48484005847-21ping07:43:200
81390,0rcu_preempt19-21ksoftirqd/108:42:491
81380,0rcu_preempt19-21ksoftirqd/109:06:431
81380,0rcu_preempt19-21ksoftirqd/108:53:291
81380,0rcu_preempt19-21ksoftirqd/107:09:061
81380,0rcu_preempt19-21ksoftirqd/107:09:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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