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2026-04-13 - 19:56

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 Mon Apr 13, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81640,0rcu_preempt3-21ksoftirqd/011:33:430
81630,0rcu_preempt15267-21kworker/0:009:33:430
81630,0rcu_preempt14107-1kworker/1:1H11:43:321
81620,0rcu_preempt3-21ksoftirqd/008:23:550
81620,0rcu_preempt19-21ksoftirqd/107:58:511
81610,0rcu_preempt5344-1kworker/0:2H09:48:550
9950600,0irq/345-48484007722sleep110:21:151
81600,0rcu_preempt25619-21kworker/0:307:13:420
10050600,0irq/346-484840054-21kswapd012:30:001
10050600,0irq/346-48484004696-1kworker/0:0H10:39:550
81590,0rcu_preempt19-21ksoftirqd/109:22:541
10050590,0irq/346-484840031685-1kworker/1:2H11:26:411
81580,0rcu_preempt3-21ksoftirqd/008:53:510
81580,0rcu_preempt3-21ksoftirqd/008:28:540
81580,0rcu_preempt2604-21ping08:19:030
10050580,0irq/346-484840054-21kswapd012:11:521
10050580,0irq/346-484840054-21kswapd009:55:321
10050580,0irq/346-484840027222-1kworker/0:0H10:19:210
81560,0rcu_preempt19-21ksoftirqd/112:02:431
10050560,0irq/346-484840054-21kswapd010:32:301
10050550,0irq/346-48484003-21ksoftirqd/012:11:470
10050550,0irq/346-484840011346-1kworker/0:3H12:15:100
9950540,0irq/345-484840030757-1kworker/0:1H09:17:430
81540,0rcu_preempt3-21ksoftirqd/009:43:430
81540,0rcu_preempt3-21ksoftirqd/008:58:470
81540,0rcu_preempt3-21ksoftirqd/008:13:510
81540,0rcu_preempt2604-21ping08:08:550
81540,0rcu_preempt2604-21ping07:59:010
81540,0rcu_preempt19-21ksoftirqd/111:30:431
10050540,0irq/346-484840054-21kswapd009:38:021
10050540,0irq/346-48484002933-21ssh10:23:450
81530,0rcu_preempt3-21ksoftirqd/011:33:220
10050530,0irq/346-4848400851-21rngd11:54:280
10050530,0irq/346-484840019049-1kworker/0:1H11:46:070
81520,0rcu_preempt9175-21kworker/u4:110:03:181
81520,0rcu_preempt5598-21apt-get09:53:430
81520,0rcu_preempt3-21ksoftirqd/012:23:420
81520,0rcu_preempt3-21ksoftirqd/012:03:540
81520,0rcu_preempt3-21ksoftirqd/011:23:590
81520,0rcu_preempt3-21ksoftirqd/010:44:010
81520,0rcu_preempt3-21ksoftirqd/010:08:530
81520,0rcu_preempt3-21ksoftirqd/008:04:040
81520,0rcu_preempt19-21ksoftirqd/108:08:491
81520,0rcu_preempt16725-21ssh11:09:540
10050520,0irq/346-484840054-21kswapd011:01:240
81510,0rcu_preempt3-21ksoftirqd/012:28:460
81510,0rcu_preempt3-21ksoftirqd/012:18:500
81510,0rcu_preempt3-21ksoftirqd/011:48:510
81510,0rcu_preempt3-21ksoftirqd/010:52:390
81510,0rcu_preempt3-21ksoftirqd/009:42:470
81510,0rcu_preempt3-21ksoftirqd/009:26:570
81510,0rcu_preempt25619-21kworker/0:307:40:360
81510,0rcu_preempt15945-21kworker/0:210:07:050
10050510,0irq/346-484840011858-1kworker/0:1H11:40:010
81500,0rcu_preempt3-21ksoftirqd/012:34:000
81500,0rcu_preempt3-21ksoftirqd/011:58:500
81500,0rcu_preempt3-21ksoftirqd/011:18:520
81500,0rcu_preempt3-21ksoftirqd/009:28:500
81490,0rcu_preempt54-21kswapd010:17:090
81490,0rcu_preempt3-21ksoftirqd/010:54:070
81490,0rcu_preempt3-21ksoftirqd/010:33:460
81490,0rcu_preempt3-21ksoftirqd/009:08:430
81490,0rcu_preempt3-21ksoftirqd/007:46:590
81490,0rcu_preempt19847-21if_eth108:48:520
10050490,0irq/346-4848400851-21rngd09:22:440
10050490,0irq/346-48484007088-21ssh12:06:041
10050490,0irq/346-484840023060-21rt-features07:19:030
81480,0rcu_preempt851-21rngd11:37:131
81480,0rcu_preempt3-21ksoftirqd/010:30:100
81480,0rcu_preempt3-21ksoftirqd/009:58:580
81480,0rcu_preempt3-21ksoftirqd/007:48:540
81480,0rcu_preempt3-21ksoftirqd/007:30:360
81480,0rcu_preempt3-21ksoftirqd/007:30:360
81480,0rcu_preempt19-21ksoftirqd/111:13:501
81480,0rcu_preempt19-21ksoftirqd/111:08:451
81470,0rcu_preempt54-21kswapd011:46:071
81470,0rcu_preempt3-21ksoftirqd/011:04:000
81470,0rcu_preempt3-21ksoftirqd/008:43:470
81470,0rcu_preempt3-21ksoftirqd/008:43:330
81470,0rcu_preempt3-21ksoftirqd/007:27:270
81470,0rcu_preempt25619-21kworker/0:307:58:220
81470,0rcu_preempt19-21ksoftirqd/108:24:401
81470,0rcu_preempt19-21ksoftirqd/108:13:531
81460,0rcu_preempt19-21ksoftirqd/110:56:201
81460,0rcu_preempt19-21ksoftirqd/109:23:481
81460,0rcu_preempt19-21ksoftirqd/108:19:001
81460,0rcu_preempt19-21ksoftirqd/108:03:421
81450,0rcu_preempt3-21ksoftirqd/011:14:220
81450,0rcu_preempt3-21ksoftirqd/009:03:480
81450,0rcu_preempt3-21ksoftirqd/007:08:520
81450,0rcu_preempt3-21ksoftirqd/007:03:480
81450,0rcu_preempt19-21ksoftirqd/111:49:241
81440,0rcu_preempt19-21ksoftirqd/111:06:161
81440,0rcu_preempt19-21ksoftirqd/110:33:451
81440,0rcu_preempt19-21ksoftirqd/109:45:451
81440,0rcu_preempt19-21ksoftirqd/107:38:541
10050440,0irq/346-48484000-21swapper/109:43:121
81430,0rcu_preempt3-21ksoftirqd/008:33:510
81430,0rcu_preempt22116-21ping07:33:430
81430,0rcu_preempt19-21ksoftirqd/110:58:551
81430,0rcu_preempt19-21ksoftirqd/110:13:211
81430,0rcu_preempt19-21ksoftirqd/107:57:361
81420,0rcu_preempt19-21ksoftirqd/112:33:561
81420,0rcu_preempt19-21ksoftirqd/110:38:321
81420,0rcu_preempt19-21ksoftirqd/110:24:561
81420,0rcu_preempt19-21ksoftirqd/110:05:071
81420,0rcu_preempt19-21ksoftirqd/108:28:451
81420,0rcu_preempt19-21ksoftirqd/107:33:511
81410,0rcu_preempt19-21ksoftirqd/112:19:011
81410,0rcu_preempt19-21ksoftirqd/111:54:001
81410,0rcu_preempt19-21ksoftirqd/111:20:161
81410,0rcu_preempt19-21ksoftirqd/110:48:511
81410,0rcu_preempt19-21ksoftirqd/109:28:571
81410,0rcu_preempt19-21ksoftirqd/109:13:501
81410,0rcu_preempt19-21ksoftirqd/109:08:491
81410,0rcu_preempt19-21ksoftirqd/107:29:041
81410,0rcu_preempt19-21ksoftirqd/107:29:041
81400,0rcu_preempt19-21ksoftirqd/112:24:201
81400,0rcu_preempt19-21ksoftirqd/110:47:301
81400,0rcu_preempt19-21ksoftirqd/110:17:491
81400,0rcu_preempt19-21ksoftirqd/107:19:111
81400,0rcu_preempt19-21ksoftirqd/107:08:531
81400,0rcu_preempt18247-21kworker/1:212:18:071
81390,0rcu_preempt19-21ksoftirqd/108:53:491
81390,0rcu_preempt19-21ksoftirqd/108:42:181
81390,0rcu_preempt19-21ksoftirqd/107:43:551
81390,0rcu_preempt19-21ksoftirqd/107:26:341
9950380,0irq/345-48484000-21swapper/107:03:501
81380,0rcu_preempt19-21ksoftirqd/109:08:011
81380,0rcu_preempt19-21ksoftirqd/108:51:421
81380,0rcu_preempt19-21ksoftirqd/107:50:121
81370,0rcu_preempt19-21ksoftirqd/109:50:381
81370,0rcu_preempt19-21ksoftirqd/109:00:571
81370,0rcu_preempt19-21ksoftirqd/108:43:491
81370,0rcu_preempt19-21ksoftirqd/108:33:461
81360,0rcu_preempt19-21ksoftirqd/107:14:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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