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2026-05-11 - 16:24

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Mon May 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811030,0rcu_preempt851-21rngd11:17:371
811020,0rcu_preempt19-21ksoftirqd/110:45:131
811000,0rcu_preempt19-21ksoftirqd/110:13:171
811000,0rcu_preempt19-21ksoftirqd/107:58:171
81940,0rcu_preempt19-21ksoftirqd/107:18:411
81830,0rcu_preempt19-21ksoftirqd/110:23:181
81810,0rcu_preempt19-21ksoftirqd/109:59:041
81780,0rcu_preempt54-21kswapd012:08:241
10050780,0irq/346-484840054-21kswapd010:57:070
10050760,0irq/346-484840054-21kswapd012:22:060
10050760,0irq/346-484840054-21kswapd010:09:540
10050750,0irq/346-484840054-21kswapd012:32:510
81740,0rcu_preempt54-21kswapd010:17:160
81740,0rcu_preempt29861-1kworker/1:3H12:38:001
10050710,0irq/346-484840054-21kswapd011:41:200
81700,0rcu_preempt3-21ksoftirqd/010:47:140
81690,0rcu_preempt54-21kswapd012:07:571
10050690,0irq/346-484840054-21kswapd012:16:520
81680,0rcu_preempt3-21ksoftirqd/011:04:300
81660,0rcu_preempt19-21ksoftirqd/110:08:371
111650,0rcuc/026301-1kworker/0:2H09:14:160
111650,0rcuc/026301-1kworker/0:2H09:14:160
81630,0rcu_preempt3-21ksoftirqd/009:36:010
81630,0rcu_preempt19-21ksoftirqd/110:06:391
9950610,0irq/345-484840032520-1kworker/0:3H12:03:130
10050610,0irq/346-484840031271-1kworker/1:1H09:29:521
81600,0rcu_preempt19-21ksoftirqd/110:51:191
10050600,0irq/346-484840015529-1kworker/1:1H11:10:271
10050590,0irq/346-484840054-21kswapd011:55:391
10050590,0irq/346-484840054-21kswapd010:39:041
10050590,0irq/346-484840019-21ksoftirqd/112:28:221
10050580,0irq/346-4848400851-21rngd09:18:041
10050580,0irq/346-4848400851-21rngd09:18:041
10050580,0irq/346-4848400593-1kworker/1:1H10:57:241
10050580,0irq/346-484840054-21kswapd009:34:251
81570,0rcu_preempt54-21kswapd009:41:380
10050570,0irq/346-484840015529-1kworker/1:1H11:21:091
10050570,0irq/346-484840015529-1kworker/1:1H11:21:091
10050570,0irq/346-48484000-21swapper/011:13:190
81560,0rcu_preempt3-21ksoftirqd/011:28:320
81560,0rcu_preempt3-21ksoftirqd/007:43:360
81560,0rcu_preempt3-21ksoftirqd/007:43:360
10050560,0irq/346-48484007074-1kworker/0:0H11:35:330
10050560,0irq/346-48484003246-1kworker/1:0H10:30:101
10050560,0irq/346-484840014213-1kworker/1:1H12:15:071
81550,0rcu_preempt32679-21ping07:58:160
81550,0rcu_preempt3-21ksoftirqd/009:28:160
10050550,0irq/346-4848400851-21rngd11:10:200
10050550,0irq/346-484840029647-1kworker/1:3H11:25:381
9950540,0irq/345-48484000-21swapper/009:49:370
81540,0rcu_preempt3-21ksoftirqd/011:58:180
81540,0rcu_preempt3-21ksoftirqd/011:48:280
10050540,0irq/346-484840054-21kswapd011:07:591
10050540,0irq/346-48484003850-1kworker/1:2H09:23:171
81530,0rcu_preempt3-21ksoftirqd/009:08:230
81530,0rcu_preempt3-21ksoftirqd/008:58:060
81530,0rcu_preempt3-21ksoftirqd/007:03:220
81530,0rcu_preempt23635-21diskmemload12:22:211
10050530,0irq/346-48484008206-1kworker/1:1H10:34:591
10050530,0irq/346-484840054-21kswapd011:22:220
10050530,0irq/346-484840054-21kswapd011:22:220
10050530,0irq/346-484840031768-21ssh11:59:321
10050530,0irq/346-484840029647-1kworker/1:3H11:31:371
10050530,0irq/346-484840018410-1kworker/1:0H09:12:421
10050530,0irq/346-484840013178-1kworker/0:2H10:36:130
10050530,0irq/346-484840012045-1kworker/1:1H11:52:321
81520,0rcu_preempt3-21ksoftirqd/011:23:590
81520,0rcu_preempt3-21ksoftirqd/009:53:160
81520,0rcu_preempt28218-21kworker/0:212:36:510
10050520,0irq/346-484840054-21kswapd009:18:371
10050520,0irq/346-484840027343-1kworker/0:0H10:52:260
10050520,0irq/346-484840023580-1kworker/1:3H09:41:411
10050520,0irq/346-484840020787-1kworker/1:2H11:39:171
10050520,0irq/346-484840012045-1kworker/1:1H11:43:401
81510,0rcu_preempt3-21ksoftirqd/010:20:110
81510,0rcu_preempt3-21ksoftirqd/008:13:050
1599510,0migration/014118-21ntp_kernel_pll_10:03:300
10050510,0irq/346-484840054-21kswapd009:45:301
81500,0rcu_preempt3-21ksoftirqd/012:09:330
81500,0rcu_preempt3-21ksoftirqd/008:48:210
81500,0rcu_preempt19928-21ping07:36:571
81500,0rcu_preempt19-21ksoftirqd/111:33:241
81500,0rcu_preempt19-21ksoftirqd/109:50:411
10050500,0irq/346-48484006005-1kworker/1:1H09:57:591
10050500,0irq/346-484840054-21kswapd012:25:260
10050500,0irq/346-484840054-21kswapd011:43:090
10050500,0irq/346-484840054-21kswapd009:45:400
10050500,0irq/346-484840054-21kswapd009:22:230
81490,0rcu_preempt5916-21diskstats10:28:220
81490,0rcu_preempt3-21ksoftirqd/011:53:290
81490,0rcu_preempt3-21ksoftirqd/010:23:250
81490,0rcu_preempt3-21ksoftirqd/008:23:300
81490,0rcu_preempt3-21ksoftirqd/008:18:340
10050490,0irq/346-48484008006-1kworker/0:3H09:24:260
81480,0rcu_preempt3-21ksoftirqd/010:58:240
81480,0rcu_preempt3-21ksoftirqd/008:03:180
10050480,0irq/346-484840025720-1kworker/1:0H10:20:031
10050480,0irq/346-48484000-21swapper/010:42:340
81470,0rcu_preempt542-21kworker/1:208:53:291
81470,0rcu_preempt3-21ksoftirqd/009:58:200
81470,0rcu_preempt3-21ksoftirqd/008:56:150
81470,0rcu_preempt3-21ksoftirqd/008:15:140
10050470,0irq/346-484840024646-21runrttasks07:31:080
10050470,0irq/346-484840024077-21ssh12:24:311
10050470,0irq/346-484840012117-21cron08:33:040
81460,0rcu_preempt32679-21ping08:08:061
81460,0rcu_preempt3-21ksoftirqd/007:55:300
81460,0rcu_preempt3-21ksoftirqd/007:48:330
81460,0rcu_preempt3148-21kworker/u4:107:23:101
81460,0rcu_preempt19-21ksoftirqd/108:03:311
10050460,0irq/346-48484002964-21ssh10:58:141
81450,0rcu_preempt3-21ksoftirqd/009:03:320
81450,0rcu_preempt3-21ksoftirqd/008:43:310
81450,0rcu_preempt19-21ksoftirqd/108:23:291
81450,0rcu_preempt19-21ksoftirqd/107:58:061
81450,0rcu_preempt12274-21apt-get08:33:150
81440,0rcu_preempt54-21kswapd008:48:291
81440,0rcu_preempt19-21ksoftirqd/108:13:341
81440,0rcu_preempt19-21ksoftirqd/107:31:411
81430,0rcu_preempt3-21ksoftirqd/007:13:230
81430,0rcu_preempt3-21ksoftirqd/007:08:240
81430,0rcu_preempt19-21ksoftirqd/107:44:221
81430,0rcu_preempt19-21ksoftirqd/107:44:221
10050430,0irq/346-484840019928-21ping07:38:321
81420,0rcu_preempt3-21ksoftirqd/007:38:190
81420,0rcu_preempt19-21ksoftirqd/107:13:301
81410,0rcu_preempt3-21ksoftirqd/008:41:360
81410,0rcu_preempt19-21ksoftirqd/108:43:061
81410,0rcu_preempt19-21ksoftirqd/108:33:261
81410,0rcu_preempt19-21ksoftirqd/108:18:221
81410,0rcu_preempt19-21ksoftirqd/107:49:281
81410,0rcu_preempt19-21ksoftirqd/107:08:231
81410,0rcu_preempt19-21ksoftirqd/107:07:101
10050410,0irq/346-484840020410-21if_can007:18:290
81400,0rcu_preempt19-21ksoftirqd/109:03:421
81400,0rcu_preempt19-21ksoftirqd/108:58:291
81400,0rcu_preempt14659-21ps08:38:331
81400,0rcu_preempt11677-21users08:28:331
81390,0rcu_preempt19928-21ping07:33:160
16647993611,0cyclictest19928-21ping07:23:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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