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2026-03-18 - 17:38

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 Wed Mar 18, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811190,0rcu_preempt54-21kswapd012:03:111
811180,0rcu_preempt19-21ksoftirqd/111:55:381
811170,0rcu_preempt19-21ksoftirqd/110:59:011
811150,0rcu_preempt19-21ksoftirqd/109:54:191
811130,0rcu_preempt19-21ksoftirqd/108:14:171
811110,0rcu_preempt19-21ksoftirqd/111:45:331
811090,0rcu_preempt19-21ksoftirqd/111:50:011
811090,0rcu_preempt19-21ksoftirqd/111:41:241
811090,0rcu_preempt19-21ksoftirqd/111:41:241
811090,0rcu_preempt19-21ksoftirqd/110:05:141
811080,0rcu_preempt19-21ksoftirqd/111:22:421
811070,0rcu_preempt19-21ksoftirqd/110:15:201
811060,0rcu_preempt19-21ksoftirqd/109:38:591
811050,0rcu_preempt54-21kswapd009:29:061
811050,0rcu_preempt19-21ksoftirqd/110:34:421
811040,0rcu_preempt6583-21ssh10:28:431
811030,0rcu_preempt19-21ksoftirqd/110:42:081
811020,0rcu_preempt9378-21kworker/1:011:36:261
811010,0rcu_preempt21288-21ping07:19:171
811010,0rcu_preempt2047-21ssh09:18:241
811010,0rcu_preempt11564-21ssh12:11:351
811000,0rcu_preempt19-21ksoftirqd/109:50:501
81990,0rcu_preempt19-21ksoftirqd/112:07:281
81990,0rcu_preempt19-21ksoftirqd/109:34:401
81990,0rcu_preempt19-21ksoftirqd/109:21:201
81990,0rcu_preempt19-21ksoftirqd/109:12:441
81990,0rcu_preempt18006-21cyclictest08:59:141
81980,0rcu_preempt19-21ksoftirqd/112:18:241
81970,0rcu_preempt0-21swapper/110:22:281
81950,0rcu_preempt19-21ksoftirqd/112:23:051
81950,0rcu_preempt19-21ksoftirqd/111:07:251
81940,0rcu_preempt54-21kswapd010:02:111
81940,0rcu_preempt25788-21ssh12:25:431
81940,0rcu_preempt19-21ksoftirqd/110:46:141
81930,0rcu_preempt19-21ksoftirqd/111:25:031
81930,0rcu_preempt19-21ksoftirqd/109:45:441
81920,0rcu_preempt19-21ksoftirqd/109:25:251
81910,0rcu_preempt19-21ksoftirqd/110:50:431
81900,0rcu_preempt19-21ksoftirqd/112:38:411
81890,0rcu_preempt54-21kswapd011:15:311
81890,0rcu_preempt19-21ksoftirqd/111:13:551
81890,0rcu_preempt19-21ksoftirqd/108:49:561
81880,0rcu_preempt19-21ksoftirqd/110:09:501
81880,0rcu_preempt19-21ksoftirqd/107:40:231
81840,0rcu_preempt19-21ksoftirqd/108:04:111
81830,0rcu_preempt26450-21kworker/1:007:48:301
81830,0rcu_preempt19-21ksoftirqd/107:29:171
81830,0rcu_preempt19-21ksoftirqd/107:28:461
81820,0rcu_preempt19-21ksoftirqd/111:29:401
81820,0rcu_preempt19-21ksoftirqd/107:35:361
81800,0rcu_preempt19-21ksoftirqd/108:19:541
81800,0rcu_preempt19-21ksoftirqd/108:19:541
81790,0rcu_preempt19-21ksoftirqd/108:00:191
81780,0rcu_preempt9378-21kworker/1:012:29:201
81780,0rcu_preempt619-21egrep07:54:071
81770,0rcu_preempt19-21ksoftirqd/108:29:111
81760,0rcu_preempt9378-21kworker/1:010:57:081
81760,0rcu_preempt19-21ksoftirqd/107:49:221
10050760,0irq/346-484840054-21kswapd010:32:370
10050760,0irq/346-484840054-21kswapd010:32:370
10050750,0irq/346-484840054-21kswapd011:09:230
81740,0rcu_preempt7709-21ssh10:29:171
81740,0rcu_preempt7709-21ssh10:29:171
81740,0rcu_preempt19-21ksoftirqd/108:44:121
81740,0rcu_preempt19-21ksoftirqd/108:25:071
81730,0rcu_preempt19-21ksoftirqd/109:04:151
81730,0rcu_preempt19-21ksoftirqd/108:35:151
81730,0rcu_preempt19-21ksoftirqd/108:09:191
81730,0rcu_preempt19-21ksoftirqd/107:17:001
81730,0rcu_preempt19-21ksoftirqd/107:13:351
10050730,0irq/346-4848400851-21rngd10:11:410
10050720,0irq/346-484840029220-1kworker/0:0H11:00:530
81710,0rcu_preempt19-21ksoftirqd/108:55:291
81700,0rcu_preempt54-21kswapd012:37:450
81700,0rcu_preempt19-21ksoftirqd/108:40:231
81700,0rcu_preempt19-21ksoftirqd/108:40:231
10050700,0irq/346-48484000-21swapper/012:09:100
81690,0rcu_preempt54-21kswapd009:57:340
10050680,0irq/346-48484009380-1kworker/0:1H10:35:340
81650,0rcu_preempt3-21ksoftirqd/009:04:220
10050640,0irq/346-484840022720-21php-cgi07:21:450
81620,0rcu_preempt3-21ksoftirqd/009:59:190
81580,0rcu_preempt54-21kswapd011:46:590
10050560,0irq/346-48484000-21swapper/012:23:290
10050560,0irq/346-48484000-21swapper/009:41:190
10050550,0irq/346-484840030255-21aten_rapower_cu09:14:080
13250530,0irq/301-48020001805-21ssh11:29:110
10050530,0irq/346-484840054-21kswapd012:24:110
9950510,0irq/345-48484007065-21apt-get08:14:070
10050510,0irq/346-4848400851-21rngd10:45:180
1801099492,0cyclictest0-21swapper/010:14:190
10050490,0irq/346-484840054-21kswapd009:21:290
10050490,0irq/346-48484000-21swapper/011:59:120
9950480,0irq/345-48484000-21swapper/009:35:320
10050480,0irq/346-484840012814-21ssh09:29:110
9950470,0irq/345-48484000-21swapper/011:56:310
9950470,0irq/345-48484000-21swapper/010:50:030
10050470,0irq/346-484840054-21kswapd011:24:010
81460,0rcu_preempt29149-1kworker/0:1H07:44:160
4350460,0irq/32-433000003968-21dropbear08:04:090
9950450,0irq/345-48484000-21swapper/011:04:120
81450,0rcu_preempt3-21ksoftirqd/007:04:240
10050450,0irq/346-484840054-21kswapd008:12:410
9950440,0irq/345-484840011458-21apt-get11:39:070
9950440,0irq/345-484840011458-21apt-get11:39:070
1801099441,0cyclictest0-21swapper/012:07:380
10050440,0irq/346-48484003069-21ssh09:51:550
10050440,0irq/346-484840023560-21kworker/0:110:57:120
9950430,0irq/345-48484008911-21munin-node0
1599430,0migration/015009-21sh10:04:100
10050430,0irq/346-484840029674-1kworker/0:2H09:45:460
9950420,0irq/345-484840025796-21ssh09:09:150
10050420,0irq/346-48484000-21swapper/012:33:550
9950410,0irq/345-48484003-21ksoftirqd/011:35:420
10050410,0irq/346-484840054-21kswapd012:15:290
10050410,0irq/346-484840031888-1kworker/0:0H10:24:200
10050410,0irq/346-484840021590-21ssh11:15:580
10050410,0irq/346-48484000-21swapper/010:22:230
1801099402,0cyclictest24719-21apt-get07:29:080
1801099402,0cyclictest0-21swapper/008:29:250
10050400,0irq/346-484840025628-21rm11:53:230
10050400,0irq/346-48484000-21swapper/007:10:210
1801099399,0cyclictest0-21swapper/008:23:570
1801099399,0cyclictest0-21swapper/008:23:570
1599390,0migration/018172-21runrttasks10:39:250
19562380,0chrt1654-1kworker/0:2H07:58:430
182952380,0chrt18106-1kworker/0:3H08:47:360
18010993814,0cyclictest0-21swapper/007:41:270
18010993814,0cyclictest0-21swapper/007:24:240
18010993811,0cyclictest0-21swapper/008:24:100
10050380,0irq/346-484840016499-21munin-node1
10050380,0irq/346-48484000-21swapper/011:22:450
10050380,0irq/346-48484000-21swapper/007:14:220
1801099372,0cyclictest21288-21ping07:49:150
9950350,0irq/345-48484003-21ksoftirqd/007:34:190
9950350,0irq/345-484840021870-21apt-get08:59:060
18010993511,0cyclictest0-21swapper/008:00:280
150012350,0chrt14797-1kworker/0:1H08:37:410
4350330,0irq/32-433000000-21swapper/008:54:110
9950320,0irq/345-48484000-21swapper/008:39:280
9950320,0irq/345-48484000-21swapper/008:39:280
10050320,0irq/346-484840019743-1kworker/0:0H08:50:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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