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2026-06-21 - 20:24

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 Sun Jun 21, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811330,0rcu_preempt3-21ksoftirqd/011:02:530
811250,0rcu_preempt3-21ksoftirqd/010:19:160
811010,0rcu_preempt19-21ksoftirqd/111:02:441
81830,0rcu_preempt54-21kswapd010:46:101
81830,0rcu_preempt19-21ksoftirqd/110:36:101
81760,0rcu_preempt54-21kswapd009:54:281
81750,0rcu_preempt19-21ksoftirqd/107:32:531
81710,0rcu_preempt3-21ksoftirqd/009:42:460
81710,0rcu_preempt19-21ksoftirqd/110:17:251
81700,0rcu_preempt54-21kswapd011:21:480
81700,0rcu_preempt26699-21kworker/u4:211:09:291
81700,0rcu_preempt26699-21kworker/u4:211:09:291
81690,0rcu_preempt0-21swapper/009:58:350
81680,0rcu_preempt54-21kswapd011:33:030
10050680,0irq/346-4848400171rcuc/111:41:161
10050680,0irq/346-4848400171rcuc/111:41:161
81670,0rcu_preempt3-21ksoftirqd/012:18:500
81670,0rcu_preempt3-21ksoftirqd/011:57:520
9950660,0irq/345-4848400181ktimersoftd/110:54:051
9950660,0irq/345-48484000-21swapper/009:53:100
81660,0rcu_preempt19-21ksoftirqd/110:20:331
10050660,0irq/346-4848400181ktimersoftd/112:19:361
10050660,0irq/346-4848400181ktimersoftd/109:50:141
81650,0rcu_preempt3-21ksoftirqd/011:01:520
9950630,0irq/345-4848400181ktimersoftd/109:42:591
9950620,0irq/345-4848400171rcuc/112:06:111
81620,0rcu_preempt19-21ksoftirqd/112:01:121
10050620,0irq/346-484840015881-1kworker/0:0H11:54:070
9950610,0irq/345-484840019-21ksoftirqd/109:07:281
81610,0rcu_preempt3-21ksoftirqd/009:14:210
81610,0rcu_preempt3-21ksoftirqd/008:17:430
10050610,0irq/346-4848400181ktimersoftd/111:37:011
10050610,0irq/346-4848400171rcuc/110:04:431
10050610,0irq/346-4848400171rcuc/110:04:431
10050610,0irq/346-4848400171rcuc/108:22:421
9950600,0irq/345-48484001307-21apt-get12:12:360
81600,0rcu_preempt8377-21ping07:42:460
81600,0rcu_preempt19-21ksoftirqd/110:01:431
10050600,0irq/346-4848400171rcuc/111:30:081
10050600,0irq/346-484840011353-1kworker/0:0H11:27:480
10050600,0irq/346-484840010943-1kworker/0:1H11:51:020
9950590,0irq/345-4848400171rcuc/112:14:221
81590,0rcu_preempt19-21ksoftirqd/110:58:331
10050590,0irq/346-484840024447-1kworker/0:0H10:53:310
10050590,0irq/346-4848400181ktimersoftd/108:16:311
10050590,0irq/346-4848400171rcuc/107:31:311
9950580,0irq/345-48484009522-1kworker/0:2H10:14:260
10050580,0irq/346-4848400181ktimersoftd/111:43:521
10050580,0irq/346-4848400181ktimersoftd/111:17:461
10050580,0irq/346-4848400171rcuc/107:14:571
10050580,0irq/346-4848400171rcuc/107:14:571
10050580,0irq/346-48484000-21swapper/011:25:120
10050580,0irq/346-48484000-21swapper/011:15:310
81570,0rcu_preempt3-21ksoftirqd/007:27:420
81570,0rcu_preempt27083-21df_inode10:27:401
81570,0rcu_preempt19-21ksoftirqd/112:07:451
81570,0rcu_preempt19-21ksoftirqd/109:12:491
10050570,0irq/346-48484000-21swapper/009:27:140
9950560,0irq/345-48484004209-21df08:42:380
9950560,0irq/345-484840022738-21if_eth009:17:440
9950560,0irq/345-48484000-21swapper/112:31:231
9950560,0irq/345-48484000-21swapper/012:24:570
81560,0rcu_preempt0-21swapper/109:17:321
10050560,0irq/346-48484005987-1kworker/0:2H11:45:490
10050560,0irq/346-484840031424-21ssh12:09:450
10050560,0irq/346-4848400181ktimersoftd/111:17:091
10050560,0irq/346-4848400181ktimersoftd/110:22:411
10050560,0irq/346-4848400171rcuc/111:56:341
10050560,0irq/346-4848400171rcuc/110:48:161
9950550,0irq/345-4848400181ktimersoftd/110:41:551
9950550,0irq/345-4848400171rcuc/111:22:431
81550,0rcu_preempt3-21ksoftirqd/008:32:250
10050550,0irq/346-48484009544-21dropbear10:42:390
10050550,0irq/346-484840026885-1kworker/0:0H09:33:280
10050550,0irq/346-484840024447-1kworker/0:0H10:26:420
9950540,0irq/345-4848400171rcuc/110:07:571
81540,0rcu_preempt3-21ksoftirqd/008:10:100
81540,0rcu_preempt19-21ksoftirqd/109:22:491
81540,0rcu_preempt19-21ksoftirqd/107:52:441
10050540,0irq/346-4848400509899cyclictest09:29:241
10050540,0irq/346-48484004372-1kworker/0:2H11:09:470
10050540,0irq/346-48484004372-1kworker/0:2H11:09:470
10050540,0irq/346-484840029424-1kworker/0:2H10:33:420
10050540,0irq/346-484840011804-1kworker/0:2H09:07:340
10050540,0irq/346-484840010156-1kworker/1:0H09:40:131
81530,0rcu_preempt3-21ksoftirqd/007:51:350
81530,0rcu_preempt24936-21kworker/0:107:17:530
10050530,0irq/346-484840026678-21rm10:27:260
10050530,0irq/346-484840024831-21ssh12:36:050
10050530,0irq/346-4848400171rcuc/107:17:391
9950520,0irq/345-484840024447-1kworker/0:0H10:51:020
9950520,0irq/345-4848400181ktimersoftd/109:33:391
81520,0rcu_preempt3-21ksoftirqd/012:02:460
81520,0rcu_preempt3-21ksoftirqd/008:01:280
81520,0rcu_preempt30353-21kworker/0:011:42:140
81520,0rcu_preempt30353-21kworker/0:011:42:140
81520,0rcu_preempt21307-21ping08:12:500
10050520,0irq/346-48484009645-21munin-node0
10050520,0irq/346-48484009261-21munin-node0
9950510,0irq/345-4848400851-21rngd09:30:550
81510,0rcu_preempt3-21ksoftirqd/009:47:390
81510,0rcu_preempt3-21ksoftirqd/009:06:200
81510,0rcu_preempt24936-21kworker/0:107:07:540
10050510,0irq/346-484840010793-21ssh10:11:160
81500,0rcu_preempt3-21ksoftirqd/010:04:210
81500,0rcu_preempt3-21ksoftirqd/010:04:210
81500,0rcu_preempt3-21ksoftirqd/007:56:510
81500,0rcu_preempt19-21ksoftirqd/108:37:511
10050500,0irq/346-484840013330-1kworker/0:2H12:27:360
81490,0rcu_preempt5231-1kworker/0:0H08:47:440
81490,0rcu_preempt29538-21kworker/0:008:25:230
81490,0rcu_preempt2396-21apt-get08:37:350
9950480,0irq/345-4848400171rcuc/111:48:511
81480,0rcu_preempt7888-21meminfo08:52:460
81480,0rcu_preempt3-21ksoftirqd/008:32:460
81480,0rcu_preempt3-21ksoftirqd/008:04:350
81480,0rcu_preempt3-21ksoftirqd/007:02:490
81480,0rcu_preempt19-21ksoftirqd/108:02:551
81480,0rcu_preempt14889-21kworker/1:207:47:421
10050480,0irq/346-484840054-21kswapd010:37:270
81460,0rcu_preempt54-21kswapd012:24:381
9950450,0irq/345-48484007521-21ntp_kernel_err07:12:490
9950450,0irq/345-48484007521-21ntp_kernel_err07:12:490
81450,0rcu_preempt54-21kswapd008:52:351
81450,0rcu_preempt5096-21cyclictest07:42:511
81440,0rcu_preempt23879-21ssh12:34:491
81440,0rcu_preempt19-21ksoftirqd/107:57:471
81430,0rcu_preempt3-21ksoftirqd/007:37:430
81430,0rcu_preempt24936-21kworker/0:107:33:060
81430,0rcu_preempt19-21ksoftirqd/108:17:441
81430,0rcu_preempt19-21ksoftirqd/107:39:321
10050420,0irq/346-48484000-21swapper/108:44:221
81410,0rcu_preempt21090-21kworker/1:108:07:491
81410,0rcu_preempt19-21ksoftirqd/107:24:281
81410,0rcu_preempt19-21ksoftirqd/107:07:451
10050410,0irq/346-484840054-21kswapd008:27:471
81400,0rcu_preempt3-21ksoftirqd/007:22:360
81400,0rcu_preempt19-21ksoftirqd/109:04:581
81390,0rcu_preempt19-21ksoftirqd/108:47:401
81370,0rcu_preempt9693-21ps08:57:511
81370,0rcu_preempt19-21ksoftirqd/108:33:471
81370,0rcu_preempt19-21ksoftirqd/107:02:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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