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2025-10-17 - 02:08

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 Thu Oct 16, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811000,0rcu_preempt3-21ksoftirqd/008:15:370
81930,0rcu_preempt3-21ksoftirqd/011:43:550
81880,0rcu_preempt3-21ksoftirqd/008:31:240
81860,0rcu_preempt3-21ksoftirqd/009:26:440
81850,0rcu_preempt3-21ksoftirqd/009:24:300
81840,0rcu_preempt5179-21kworker/0:012:25:300
81830,0rcu_preempt54-21kswapd007:55:390
81830,0rcu_preempt19115-21kworker/0:009:19:320
81830,0rcu_preempt14267-21ssh11:23:030
81820,0rcu_preempt3-21ksoftirqd/011:03:150
81810,0rcu_preempt3-21ksoftirqd/012:00:340
81810,0rcu_preempt3-21ksoftirqd/012:00:340
81800,0rcu_preempt17665-21kworker/0:007:40:280
81800,0rcu_preempt14-21kcmosdelayd12:30:390
81790,0rcu_preempt3-21ksoftirqd/010:49:310
81770,0rcu_preempt3-21ksoftirqd/010:25:140
81770,0rcu_preempt3-21ksoftirqd/010:10:340
81760,0rcu_preempt3-21ksoftirqd/012:05:410
81750,0rcu_preempt3-21ksoftirqd/009:30:510
81730,0rcu_preempt3-21ksoftirqd/011:33:430
81710,0rcu_preempt3-21ksoftirqd/011:15:220
81700,0rcu_preempt3-21ksoftirqd/012:24:110
81700,0rcu_preempt3-21ksoftirqd/009:46:140
10050700,0irq/346-484840014642-1kworker/0:0H10:01:100
10050700,0irq/346-4848400111rcuc/010:57:530
81680,0rcu_preempt3-21ksoftirqd/007:50:280
81650,0rcu_preempt54-21kswapd009:08:410
81630,0rcu_preempt3-21ksoftirqd/010:17:020
81620,0rcu_preempt9710-21diskmemload10:40:410
81600,0rcu_preempt54-21kswapd011:03:151
10050600,0irq/346-484840031002-1kworker/0:2H11:06:330
10050590,0irq/346-48484009447-1kworker/1:0H09:15:391
9950580,0irq/345-484840081rcu_preempt12:30:531
81580,0rcu_preempt3-21ksoftirqd/007:30:430
10050580,0irq/346-48484006121-1kworker/0:2H11:13:110
10050580,0irq/346-48484006121-1kworker/0:2H11:13:110
81570,0rcu_preempt54-21kswapd010:53:411
81570,0rcu_preempt3-21ksoftirqd/009:14:410
81570,0rcu_preempt0-21swapper/009:56:490
10050570,0irq/346-48484004981-1kworker/0:2H10:28:480
81560,0rcu_preempt3-21ksoftirqd/010:34:340
10050560,0irq/346-484840054-21kswapd010:45:251
81550,0rcu_preempt3-21ksoftirqd/012:14:470
81550,0rcu_preempt3-21ksoftirqd/012:14:470
81550,0rcu_preempt3-21ksoftirqd/011:54:060
81550,0rcu_preempt19-21ksoftirqd/111:13:211
81550,0rcu_preempt19-21ksoftirqd/111:13:211
81550,0rcu_preempt19-21ksoftirqd/110:55:591
81540,0rcu_preempt3-21ksoftirqd/011:57:320
81540,0rcu_preempt3-21ksoftirqd/009:35:350
81540,0rcu_preempt3-21ksoftirqd/008:10:430
81540,0rcu_preempt19-21ksoftirqd/111:06:521
10050520,0irq/346-484840032283-1kworker/0:0H11:49:020
9950510,0irq/345-484840015506-1kworker/1:1H09:22:041
10050500,0irq/346-48484009447-1kworker/1:0H09:11:551
10050500,0irq/346-4848400753-21rngd08:27:230
9950490,0irq/345-48484009895-1kworker/1:0H11:18:101
81490,0rcu_preempt3-21ksoftirqd/011:28:440
81490,0rcu_preempt3-21ksoftirqd/009:52:520
10050490,0irq/346-484840019-21ksoftirqd/109:25:291
81480,0rcu_preempt20991-21meminfo10:05:381
81480,0rcu_preempt19-21ksoftirqd/110:30:141
81480,0rcu_preempt19-21ksoftirqd/108:21:171
81480,0rcu_preempt19-21ksoftirqd/108:21:171
81480,0rcu_preempt19-21ksoftirqd/108:07:411
10050480,0irq/346-48484003260-1kworker/1:3H11:55:381
9950470,0irq/345-48484000-21swapper/010:10:130
81470,0rcu_preempt25824-21munin-node1
81470,0rcu_preempt19-21ksoftirqd/110:15:331
81470,0rcu_preempt19-21ksoftirqd/108:29:181
81470,0rcu_preempt19-21ksoftirqd/107:55:441
81470,0rcu_preempt11684-21kworker/1:209:53:361
81460,0rcu_preempt5118-21df_inode08:50:290
81460,0rcu_preempt3-21ksoftirqd/012:15:320
81460,0rcu_preempt3-21ksoftirqd/008:55:270
81460,0rcu_preempt21744-21apt-get12:15:261
81460,0rcu_preempt19-21ksoftirqd/110:00:291
81460,0rcu_preempt19-21ksoftirqd/108:00:301
81460,0rcu_preempt11562-21memory10:35:390
81460,0rcu_preempt0-21swapper/111:40:271
10050460,0irq/346-4848400465-1kworker/0:2H09:40:360
10050460,0irq/346-484840027871-1kworker/1:0H12:22:001
81450,0rcu_preempt13352-21ntpq07:35:470
81450,0rcu_preempt0-21swapper/109:05:181
10050450,0irq/346-48484005942-21ping07:25:401
10050450,0irq/346-48484003991-1kworker/0:1H07:15:530
10050450,0irq/346-48484002860-1kworker/0:2H08:45:320
9950440,0irq/345-484840020936-1kworker/1:1H11:36:001
81440,0rcu_preempt3-21ksoftirqd/010:50:290
81440,0rcu_preempt3-21ksoftirqd/007:00:370
81440,0rcu_preempt3-21ksoftirqd/007:00:370
81440,0rcu_preempt2218-21memory08:40:370
81440,0rcu_preempt19-21ksoftirqd/110:25:341
81440,0rcu_preempt19-21ksoftirqd/108:10:401
81440,0rcu_preempt19-21ksoftirqd/107:35:461
81440,0rcu_preempt17649-21ssh12:10:251
81440,0rcu_preempt17649-21ssh12:10:251
81440,0rcu_preempt16144-21df_inode07:45:290
10050440,0irq/346-48484004237-21dropbear07:09:500
10050440,0irq/346-484840024165-21ssh10:10:251
81430,0rcu_preempt3-21ksoftirqd/008:35:360
81430,0rcu_preempt3-21ksoftirqd/007:10:420
81430,0rcu_preempt23179-21diskstats11:35:310
81430,0rcu_preempt19-21ksoftirqd/110:40:571
81430,0rcu_preempt19-21ksoftirqd/109:40:321
81430,0rcu_preempt19-21ksoftirqd/107:30:431
1699430,0migration/11322-21sh07:00:281
1699430,0migration/11322-21sh07:00:281
10050430,0irq/346-48484001239-21snmpd12:05:401
81420,0rcu_preempt3-21ksoftirqd/009:00:390
81420,0rcu_preempt19-21ksoftirqd/111:20:291
81420,0rcu_preempt19-21ksoftirqd/109:55:401
81420,0rcu_preempt19-21ksoftirqd/109:35:151
81420,0rcu_preempt14629-21kworker/1:207:20:331
9950410,0irq/345-484840028648-21runrttasks08:22:060
9950410,0irq/345-484840028648-21runrttasks08:22:060
81410,0rcu_preempt9188-21latency_hist09:50:141
81410,0rcu_preempt4439-21munin-node1
81410,0rcu_preempt32071-1kworker/1:1H12:27:301
81410,0rcu_preempt19-21ksoftirqd/112:03:241
81410,0rcu_preempt19-21ksoftirqd/112:03:241
81410,0rcu_preempt19-21ksoftirqd/111:30:151
81410,0rcu_preempt19-21ksoftirqd/110:35:291
81410,0rcu_preempt19-21ksoftirqd/108:50:371
81410,0rcu_preempt19-21ksoftirqd/108:45:351
81410,0rcu_preempt19-21ksoftirqd/107:44:511
81410,0rcu_preempt19-21ksoftirqd/107:15:331
10050410,0irq/346-48484005942-21ping07:25:140
81400,0rcu_preempt3-21ksoftirqd/008:00:300
81400,0rcu_preempt19-21ksoftirqd/111:52:131
81400,0rcu_preempt19-21ksoftirqd/110:20:391
81400,0rcu_preempt19-21ksoftirqd/108:30:441
2653994013,0cyclictest9410-21runrttasks07:25:250
10050400,0irq/346-484840031175-21ssh11:45:381
81390,0rcu_preempt3-21ksoftirqd/008:05:290
81390,0rcu_preempt19-21ksoftirqd/109:31:041
81390,0rcu_preempt19-21ksoftirqd/108:57:091
81390,0rcu_preempt19-21ksoftirqd/108:41:311
81390,0rcu_preempt19-21ksoftirqd/108:36:151
81390,0rcu_preempt19-21ksoftirqd/107:54:581
81390,0rcu_preempt19-21ksoftirqd/107:45:361
10050390,0irq/346-484840016179-21ssh11:25:381
81380,0rcu_preempt19-21ksoftirqd/109:02:441
81360,0rcu_preempt19-21ksoftirqd/107:08:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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