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2025-11-05 - 00:34

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 Tue Nov 04, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811460,0rcu_preempt16315-21kworker/0:210:42:130
811270,0rcu_preempt3-21ksoftirqd/011:23:460
79182830,0sleep09950irq/345-484840009:14:410
81760,0rcu_preempt3-21ksoftirqd/011:56:390
81730,0rcu_preempt32217-1kworker/0:3H11:25:100
81690,0rcu_preempt3-21ksoftirqd/010:15:080
81690,0rcu_preempt0-21swapper/110:01:301
81680,0rcu_preempt54-21kswapd010:59:411
81680,0rcu_preempt19-21ksoftirqd/110:05:551
10050680,0irq/346-4848400181ktimersoftd/112:25:241
81670,0rcu_preempt3-21ksoftirqd/010:52:280
81670,0rcu_preempt19-21ksoftirqd/112:23:181
81670,0rcu_preempt19-21ksoftirqd/112:23:181
81670,0rcu_preempt19-21ksoftirqd/110:39:201
81670,0rcu_preempt19-21ksoftirqd/110:21:041
81670,0rcu_preempt19-21ksoftirqd/110:19:191
81660,0rcu_preempt19-21ksoftirqd/111:08:401
81660,0rcu_preempt19-21ksoftirqd/109:49:501
81660,0rcu_preempt19-21ksoftirqd/108:25:251
10050660,0irq/346-4848400171rcuc/112:16:441
81650,0rcu_preempt19-21ksoftirqd/111:42:141
81640,0rcu_preempt3-21ksoftirqd/008:29:010
81640,0rcu_preempt19-21ksoftirqd/109:36:201
81640,0rcu_preempt19-21ksoftirqd/109:36:201
81640,0rcu_preempt19-21ksoftirqd/109:22:411
10050640,0irq/346-4848400181ktimersoftd/109:27:121
10050640,0irq/346-484840016678-21cron10:59:500
81630,0rcu_preempt3-21ksoftirqd/012:25:070
81630,0rcu_preempt3-21ksoftirqd/009:46:300
81630,0rcu_preempt19-21ksoftirqd/111:59:571
81630,0rcu_preempt19-21ksoftirqd/111:03:111
81630,0rcu_preempt19-21ksoftirqd/110:28:551
10050630,0irq/346-484840010604-21ssh12:23:120
10050630,0irq/346-484840010604-21ssh12:23:120
81620,0rcu_preempt3-21ksoftirqd/010:21:310
81620,0rcu_preempt30718-21if_eth112:05:150
81620,0rcu_preempt19-21ksoftirqd/111:49:491
10050620,0irq/346-48484004875-1kworker/0:3H10:07:260
10050620,0irq/346-4848400171rcuc/111:30:391
9950610,0irq/345-4848400181ktimersoftd/109:41:221
9950610,0irq/345-4848400171rcuc/109:51:241
81610,0rcu_preempt3-21ksoftirqd/008:30:210
81610,0rcu_preempt19-21ksoftirqd/112:10:341
81610,0rcu_preempt19-21ksoftirqd/111:29:441
78562610,0sleep09950irq/345-484840010:00:220
81600,0rcu_preempt3-21ksoftirqd/012:00:570
81600,0rcu_preempt3-21ksoftirqd/011:00:200
81600,0rcu_preempt3-21ksoftirqd/009:31:080
81600,0rcu_preempt19-21ksoftirqd/108:52:331
10050600,0irq/346-484840030803-1kworker/0:0H10:35:260
10050600,0irq/346-4848400171rcuc/111:38:421
10050600,0irq/346-48484000-21swapper/009:58:190
81590,0rcu_preempt3-21ksoftirqd/009:25:020
81590,0rcu_preempt19-21ksoftirqd/108:12:281
10050590,0irq/346-4848400181ktimersoftd/109:30:181
10050590,0irq/346-484840010175-1kworker/0:2H11:50:230
9950580,0irq/345-48484000-21swapper/012:30:160
9950580,0irq/345-48484000-21swapper/012:30:160
81580,0rcu_preempt3-21ksoftirqd/010:32:410
81580,0rcu_preempt3-21ksoftirqd/008:45:110
81580,0rcu_preempt19-21ksoftirqd/111:14:351
10050580,0irq/346-484840027697-21rm11:15:200
10050580,0irq/346-4848400171rcuc/112:30:341
10050580,0irq/346-4848400171rcuc/112:30:341
10050580,0irq/346-4848400171rcuc/111:23:071
10050580,0irq/346-4848400171rcuc/110:50:151
10050580,0irq/346-484840011626-21ssh11:38:460
81570,0rcu_preempt3-21ksoftirqd/011:13:110
81570,0rcu_preempt3-21ksoftirqd/007:10:030
81570,0rcu_preempt2803-21kworker/0:012:15:030
81570,0rcu_preempt19-21ksoftirqd/109:17:081
10050570,0irq/346-484840032170-21ssh09:50:140
10050570,0irq/346-484840027693-21df08:40:070
9950560,0irq/345-4848400181ktimersoftd/109:10:111
9950560,0irq/345-484840013474-1kworker/0:1H10:10:190
10050560,0irq/346-48484000-21swapper/010:46:530
10050560,0irq/346-48484000-21swapper/010:29:110
9950550,0irq/345-4848400181ktimersoftd/111:15:271
9950550,0irq/345-4848400171rcuc/110:12:581
9950550,0irq/345-4848400171rcuc/109:57:401
81550,0rcu_preempt3-21ksoftirqd/011:40:030
10050550,0irq/346-4848400171rcuc/112:06:591
10050550,0irq/346-484840011204-1kworker/0:0H09:19:510
9950540,0irq/345-484840019787-21diskstats12:35:080
9950540,0irq/345-48484000-21swapper/011:07:370
81540,0rcu_preempt3-21ksoftirqd/012:10:010
81540,0rcu_preempt3-21ksoftirqd/007:20:090
10050540,0irq/346-4848400171rcuc/110:34:251
9950530,0irq/345-4848400171rcuc/110:43:351
10050530,0irq/346-48484002837-1kworker/0:2H09:05:120
10050530,0irq/346-48484001195-21ping07:25:120
9950520,0irq/345-4848400181ktimersoftd/111:59:261
9950520,0irq/345-4848400171rcuc/110:45:421
81520,0rcu_preempt14176-21ping08:00:120
10050520,0irq/346-484840024697-21munin-node0
10050520,0irq/346-484840023008-1kworker/0:2H09:39:250
10050520,0irq/346-484840023008-1kworker/0:2H09:39:250
81510,0rcu_preempt3719-21kworker/1:207:48:331
81510,0rcu_preempt3-21ksoftirqd/008:15:060
10050510,0irq/346-484840054-21kswapd011:33:170
10050510,0irq/346-484840015663-1kworker/0:1H08:10:100
81500,0rcu_preempt3-21ksoftirqd/008:20:200
9950490,0irq/345-484840014176-21ping08:04:071
9950490,0irq/345-48484000-21swapper/108:19:501
9950490,0irq/345-48484000-21swapper/008:49:560
81490,0rcu_preempt3-21ksoftirqd/008:59:380
81490,0rcu_preempt29016-21kworker/0:207:46:180
81490,0rcu_preempt19-21ksoftirqd/111:50:311
10050490,0irq/346-484840027330-1kworker/0:0H08:39:510
10050490,0irq/346-484840010175-1kworker/0:2H11:45:020
9950480,0irq/345-48484000-21swapper/007:55:160
81480,0rcu_preempt3-21ksoftirqd/009:23:520
81480,0rcu_preempt11176-21apt-get07:50:050
10050480,0irq/346-484840054-21kswapd008:19:521
10050480,0irq/346-484840015663-1kworker/0:1H08:09:140
10050480,0irq/346-48484001166-1kworker/0:3H09:01:250
10050480,0irq/346-48484000-21swapper/007:19:510
10050480,0irq/346-48484000-21swapper/007:19:510
81470,0rcu_preempt29016-21kworker/0:207:40:190
10050470,0irq/346-484840031625-1kworker/1:3H07:15:091
10050470,0irq/346-484840031625-1kworker/1:3H07:15:091
9950460,0irq/345-48484001338-21latency_hist07:19:531
81460,0rcu_preempt19-21ksoftirqd/108:29:521
81450,0rcu_preempt19-21ksoftirqd/108:57:141
10050450,0irq/346-484840023428-1kworker/0:4H07:36:550
81440,0rcu_preempt3719-21kworker/1:207:35:181
10050440,0irq/346-484840032081-1kworker/1:2H12:38:011
81430,0rcu_preempt29418-21meminfo07:05:130
81430,0rcu_preempt19-21ksoftirqd/108:05:181
81430,0rcu_preempt19-21ksoftirqd/107:28:481
81420,0rcu_preempt3-21ksoftirqd/007:30:190
81410,0rcu_preempt19-21ksoftirqd/107:40:501
81410,0rcu_preempt19-21ksoftirqd/107:05:041
10050410,0irq/346-48484004786-21munin-run09:09:501
81400,0rcu_preempt0-21swapper/108:40:181
81390,0rcu_preempt19-21ksoftirqd/109:00:041
81390,0rcu_preempt19-21ksoftirqd/107:59:501
81390,0rcu_preempt19-21ksoftirqd/107:30:001
81380,0rcu_preempt29782-21grep08:45:171
81380,0rcu_preempt19-21ksoftirqd/107:52:051
81380,0rcu_preempt19-21ksoftirqd/107:10:171
81370,0rcu_preempt19-21ksoftirqd/108:35:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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