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2026-05-07 - 18:36

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 May 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811410,0rcu_preempt19-21ksoftirqd/111:15:481
811410,0rcu_preempt19-21ksoftirqd/109:28:361
811340,0rcu_preempt19-21ksoftirqd/107:18:331
811310,0rcu_preempt19-21ksoftirqd/109:23:391
811270,0rcu_preempt19-21ksoftirqd/109:38:361
811190,0rcu_preempt13300-21kworker/1:010:59:141
811120,0rcu_preempt19-21ksoftirqd/109:20:561
811100,0rcu_preempt19-21ksoftirqd/110:24:531
811060,0rcu_preempt19-21ksoftirqd/111:45:311
811000,0rcu_preempt19-21ksoftirqd/107:44:051
81940,0rcu_preempt30534-21kworker/1:111:53:401
81910,0rcu_preempt19-21ksoftirqd/109:08:311
81890,0rcu_preempt19-21ksoftirqd/111:22:591
81850,0rcu_preempt54-21kswapd011:48:331
81840,0rcu_preempt19482-21diskmemload09:33:241
81840,0rcu_preempt19-21ksoftirqd/110:28:201
81830,0rcu_preempt19-21ksoftirqd/108:13:311
81830,0rcu_preempt19-21ksoftirqd/108:13:311
81810,0rcu_preempt19-21ksoftirqd/110:08:201
81800,0rcu_preempt29146-1kworker/1:0H09:55:551
81790,0rcu_preempt19-21ksoftirqd/112:23:211
81780,0rcu_preempt54-21kswapd010:03:211
81780,0rcu_preempt19-21ksoftirqd/111:58:511
81780,0rcu_preempt19-21ksoftirqd/111:23:311
81780,0rcu_preempt19-21ksoftirqd/110:49:031
81760,0rcu_preempt19-21ksoftirqd/110:34:311
81760,0rcu_preempt19-21ksoftirqd/108:53:241
81740,0rcu_preempt54-21kswapd007:28:431
81740,0rcu_preempt19-21ksoftirqd/112:36:041
81730,0rcu_preempt2103-1kworker/1:2H10:42:381
81730,0rcu_preempt19-21ksoftirqd/110:18:211
81720,0rcu_preempt4192-1kworker/1:1H10:01:121
10050720,0irq/346-484840054-21kswapd010:33:130
10050720,0irq/346-48484002219-1kworker/0:2H09:40:220
12498997110,0cyclictest20366-21ssh09:08:300
10050710,0irq/346-484840014069-1kworker/0:3H10:46:020
81700,0rcu_preempt851-21rngd11:33:020
81700,0rcu_preempt19-21ksoftirqd/111:03:521
10050700,0irq/346-484840029336-1kworker/0:0H09:19:370
10050700,0irq/346-484840022041-1kworker/0:0H10:50:020
81690,0rcu_preempt8845-1kworker/1:0H11:42:111
81690,0rcu_preempt19-21ksoftirqd/111:33:471
10050690,0irq/346-484840041ktimersoftd/009:23:300
81670,0rcu_preempt19-21ksoftirqd/110:43:351
81660,0rcu_preempt19-21ksoftirqd/110:18:091
81650,0rcu_preempt19-21ksoftirqd/112:22:581
81650,0rcu_preempt19-21ksoftirqd/111:13:091
1249899632,0cyclictest0-21swapper/008:27:520
10050630,0irq/346-484840027926-1kworker/0:2H12:00:000
1249899615,0cyclictest22508-21taskset12:27:100
81600,0rcu_preempt3-21ksoftirqd/012:31:080
81600,0rcu_preempt19-21ksoftirqd/110:57:151
1249899602,0cyclictest0-21swapper/009:28:370
81590,0rcu_preempt19-21ksoftirqd/112:12:451
81590,0rcu_preempt19-21ksoftirqd/109:43:371
81570,0rcu_preempt19-21ksoftirqd/108:43:291
1249899574,0cyclictest0-21swapper/010:18:200
1249899572,0cyclictest18441-21munin-node0
1249899571,0cyclictest10196-1kworker/0:1H11:10:180
1249899568,0cyclictest0-21swapper/010:39:330
1249899562,0cyclictest0-21swapper/011:06:550
81550,0rcu_preempt19-21ksoftirqd/112:03:221
81540,0rcu_preempt19482-21diskmemload12:17:141
81540,0rcu_preempt19-21ksoftirqd/107:48:241
10050530,0irq/346-48484001470-21runrttasks11:45:340
81520,0rcu_preempt29543-21meminfo11:28:301
81520,0rcu_preempt19-21ksoftirqd/108:23:211
81510,0rcu_preempt2260-21ssh09:55:400
81510,0rcu_preempt19-21ksoftirqd/108:38:101
10050510,0irq/346-484840054-21kswapd011:13:310
81500,0rcu_preempt13255-21df_inode08:48:231
10050500,0irq/346-484840054-21kswapd011:43:090
10050500,0irq/346-484840012477-21cron07:08:090
81490,0rcu_preempt19-21ksoftirqd/109:13:351
81490,0rcu_preempt19-21ksoftirqd/107:53:331
1249899491,0cyclictest24125-21munin-node0
10050490,0irq/346-4848400851-21rngd09:51:400
10050490,0irq/346-484840054-21kswapd012:20:430
10050490,0irq/346-484840054-21kswapd011:58:030
10050490,0irq/346-484840021929-1kworker/0:1H09:13:300
81480,0rcu_preempt3-21ksoftirqd/010:23:290
81480,0rcu_preempt28852-21ping08:18:520
81480,0rcu_preempt19-21ksoftirqd/107:58:361
10050480,0irq/346-4848400851-21rngd10:04:220
81460,0rcu_preempt989-21kworker/0:208:10:220
81460,0rcu_preempt3-21ksoftirqd/011:48:340
10050460,0irq/346-484840015780-21ping07:23:211
10050460,0irq/346-48484000-21swapper/010:13:270
81450,0rcu_preempt19-21ksoftirqd/109:03:211
81450,0rcu_preempt19-21ksoftirqd/107:08:271
81450,0rcu_preempt16441-1kworker/0:2H11:18:390
10050450,0irq/346-48484000-21swapper/012:33:560
81440,0rcu_preempt851-21rngd11:34:320
81440,0rcu_preempt3-21ksoftirqd/012:15:220
81440,0rcu_preempt3-21ksoftirqd/010:08:390
81440,0rcu_preempt3-21ksoftirqd/008:36:480
81440,0rcu_preempt3-21ksoftirqd/007:08:280
81440,0rcu_preempt19-21ksoftirqd/112:28:301
10050440,0irq/346-48484000-21swapper/009:37:230
81430,0rcu_preempt32451-21taskset10:58:340
81430,0rcu_preempt28852-21ping08:08:070
81430,0rcu_preempt19-21ksoftirqd/108:03:221
81430,0rcu_preempt12906-1kworker/1:0H08:58:241
10050430,0irq/346-484840027707-21ntp_kernel_pll_09:48:341
10050430,0irq/346-48484000-21swapper/011:25:020
81420,0rcu_preempt3-21ksoftirqd/009:46:350
81420,0rcu_preempt3-21ksoftirqd/009:06:150
81420,0rcu_preempt3-21ksoftirqd/008:45:280
81420,0rcu_preempt2481-21kworker/0:210:02:150
81420,0rcu_preempt19-21ksoftirqd/108:08:261
10050420,0irq/346-48484000-21swapper/012:09:200
81410,0rcu_preempt3-21ksoftirqd/012:06:410
81410,0rcu_preempt3-21ksoftirqd/008:58:310
81410,0rcu_preempt3-21ksoftirqd/008:50:170
81400,0rcu_preempt3-21ksoftirqd/007:58:170
81400,0rcu_preempt3-21ksoftirqd/007:50:220
81400,0rcu_preempt28799-21ssh10:54:520
81400,0rcu_preempt19-21ksoftirqd/107:34:031
81400,0rcu_preempt0-21swapper/108:33:351
12498994014,0cyclictest0-21swapper/007:28:390
9950390,0irq/345-484840013784-1kworker/0:3H07:13:250
81390,0rcu_preempt3-21ksoftirqd/010:30:380
81390,0rcu_preempt3-21ksoftirqd/008:56:060
81390,0rcu_preempt3-21ksoftirqd/008:31:330
81390,0rcu_preempt19-21ksoftirqd/107:03:221
81380,0rcu_preempt3-21ksoftirqd/007:53:150
81380,0rcu_preempt19-21ksoftirqd/107:13:361
9950370,0irq/345-48484000-21swapper/107:38:301
81370,0rcu_preempt3-21ksoftirqd/008:39:050
81370,0rcu_preempt28852-21ping08:28:171
81370,0rcu_preempt15780-21ping07:38:200
81370,0rcu_preempt0-21swapper/108:18:261
1249899362,0cyclictest0-21swapper/007:36:020
1249899362,0cyclictest0-21swapper/007:18:400
1249899351,0cyclictest28852-21ping08:14:000
1249899351,0cyclictest28852-21ping08:14:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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