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2026-06-12 - 20:49

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 Fri Jun 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811090,0rcu_preempt3-21ksoftirqd/012:35:480
811030,0rcu_preempt19-21ksoftirqd/111:11:561
811030,0rcu_preempt19-21ksoftirqd/111:11:561
811010,0rcu_preempt3-21ksoftirqd/009:21:070
81970,0rcu_preempt3-21ksoftirqd/012:23:020
81970,0rcu_preempt19-21ksoftirqd/107:38:061
81950,0rcu_preempt9589-21ssh10:37:031
81900,0rcu_preempt54-21kswapd010:00:281
81870,0rcu_preempt0-21swapper/112:10:341
81820,0rcu_preempt19-21ksoftirqd/112:36:081
81790,0rcu_preempt19-21ksoftirqd/110:43:331
81770,0rcu_preempt18885-21ssh12:26:191
81760,0rcu_preempt15808-21ssh10:09:251
81750,0rcu_preempt19-21ksoftirqd/111:49:151
81730,0rcu_preempt3-21ksoftirqd/010:16:530
81720,0rcu_preempt19-21ksoftirqd/112:03:591
81710,0rcu_preempt54-21kswapd011:27:411
81660,0rcu_preempt19-21ksoftirqd/111:26:021
81660,0rcu_preempt19-21ksoftirqd/107:28:091
81630,0rcu_preempt19-21ksoftirqd/110:22:591
81630,0rcu_preempt19-21ksoftirqd/109:50:381
81620,0rcu_preempt30282-1kworker/1:1H10:27:491
81620,0rcu_preempt19-21ksoftirqd/112:14:141
81610,0rcu_preempt19-21ksoftirqd/111:06:081
81610,0rcu_preempt19-21ksoftirqd/110:03:341
81610,0rcu_preempt19-21ksoftirqd/109:42:231
81610,0rcu_preempt19-21ksoftirqd/107:22:551
81600,0rcu_preempt3-21ksoftirqd/008:22:450
81590,0rcu_preempt4852-21kworker/0:211:47:450
81590,0rcu_preempt19505-21diskmemload09:12:551
81580,0rcu_preempt3-21ksoftirqd/010:27:250
81580,0rcu_preempt19-21ksoftirqd/111:45:041
81580,0rcu_preempt19-21ksoftirqd/109:27:301
81570,0rcu_preempt1470-21runrttasks07:17:551
81570,0rcu_preempt1470-21runrttasks07:17:551
9950560,0irq/345-484840019-21ksoftirqd/109:45:291
81560,0rcu_preempt3-21ksoftirqd/011:55:040
81560,0rcu_preempt3-21ksoftirqd/008:07:000
81550,0rcu_preempt3-21ksoftirqd/011:30:250
81550,0rcu_preempt3-21ksoftirqd/009:32:090
9950540,0irq/345-4848400171rcuc/112:28:281
9950530,0irq/345-4848400181ktimersoftd/111:21:441
81530,0rcu_preempt54-21kswapd009:45:590
81530,0rcu_preempt19-21ksoftirqd/108:18:041
9950520,0irq/345-4848400171rcuc/111:55:231
9950520,0irq/345-4848400171rcuc/110:50:191
9950520,0irq/345-4848400171rcuc/110:50:191
81520,0rcu_preempt851-21rngd08:22:591
81520,0rcu_preempt3-21ksoftirqd/011:45:140
81520,0rcu_preempt3-21ksoftirqd/009:12:460
81520,0rcu_preempt3-21ksoftirqd/007:58:000
81520,0rcu_preempt25175-21kworker/0:209:47:460
81520,0rcu_preempt19-21ksoftirqd/110:56:091
9950510,0irq/345-484840018337-21seq09:38:210
81510,0rcu_preempt3-21ksoftirqd/011:15:040
81510,0rcu_preempt3-21ksoftirqd/009:09:190
81510,0rcu_preempt3-21ksoftirqd/008:19:250
81510,0rcu_preempt19505-21diskmemload12:18:341
81510,0rcu_preempt19-21ksoftirqd/110:58:581
81510,0rcu_preempt19-21ksoftirqd/110:58:581
81510,0rcu_preempt19-21ksoftirqd/109:22:321
81510,0rcu_preempt19-21ksoftirqd/108:42:531
81500,0rcu_preempt3-21ksoftirqd/012:27:520
81500,0rcu_preempt3-21ksoftirqd/012:12:350
81500,0rcu_preempt3-21ksoftirqd/010:57:460
81500,0rcu_preempt3-21ksoftirqd/010:57:460
81500,0rcu_preempt3-21ksoftirqd/010:32:520
81500,0rcu_preempt3-21ksoftirqd/009:07:090
81500,0rcu_preempt1098-21kworker/0:208:09:430
10050500,0irq/346-484840027190-1kworker/0:0H10:57:230
81490,0rcu_preempt3-21ksoftirqd/009:53:020
81490,0rcu_preempt3-21ksoftirqd/007:55:040
81490,0rcu_preempt19-21ksoftirqd/111:15:011
81490,0rcu_preempt19-21ksoftirqd/108:40:051
9950480,0irq/345-4848400948-21ssh10:27:510
9950480,0irq/345-484840019950-21runrttasks10:47:370
9950480,0irq/345-484840019950-21runrttasks10:47:370
81480,0rcu_preempt54-21kswapd007:42:571
81480,0rcu_preempt3-21ksoftirqd/012:07:590
81480,0rcu_preempt3-21ksoftirqd/011:02:480
81480,0rcu_preempt3-21ksoftirqd/009:23:060
81480,0rcu_preempt3-21ksoftirqd/007:02:510
81480,0rcu_preempt31393-21ssh09:52:401
4350480,0irq/32-433000007394-21df_inode11:07:490
4350480,0irq/32-433000007394-21df_inode11:07:490
9950470,0irq/345-48484008388-21taskset10:02:300
81470,0rcu_preempt3-21ksoftirqd/011:36:460
81470,0rcu_preempt3-21ksoftirqd/011:25:220
81470,0rcu_preempt3-21ksoftirqd/010:40:470
81470,0rcu_preempt25971-21ssh10:20:011
81470,0rcu_preempt23534-21kworker/0:210:42:460
81470,0rcu_preempt19-21ksoftirqd/111:57:581
81470,0rcu_preempt19-21ksoftirqd/108:08:011
81470,0rcu_preempt19-21ksoftirqd/108:05:271
81470,0rcu_preempt19-21ksoftirqd/107:57:541
81470,0rcu_preempt10322-21apt-get12:17:460
10050470,0irq/346-484840015770-21ssh09:36:280
81460,0rcu_preempt54-21kswapd011:35:091
81460,0rcu_preempt3-21ksoftirqd/008:33:310
81460,0rcu_preempt3-21ksoftirqd/008:30:530
81460,0rcu_preempt3-21ksoftirqd/007:10:530
81460,0rcu_preempt19-21ksoftirqd/109:08:001
81460,0rcu_preempt15795-21ping07:36:421
81460,0rcu_preempt13659-21memory08:47:571
81460,0rcu_preempt12508-21cyclictest08:12:560
9950450,0irq/345-48484008364-21ssh11:42:330
9950450,0irq/345-48484000-21swapper/010:12:110
81450,0rcu_preempt3-21ksoftirqd/009:01:510
81450,0rcu_preempt3-21ksoftirqd/008:44:520
81450,0rcu_preempt19-21ksoftirqd/110:37:501
81450,0rcu_preempt19-21ksoftirqd/108:13:031
81450,0rcu_preempt10943-1kworker/dying08:49:030
9950440,0irq/345-484840025753-21seq11:59:450
9950440,0irq/345-484840015712-21sed08:53:010
81440,0rcu_preempt3-21ksoftirqd/012:05:330
81440,0rcu_preempt19-21ksoftirqd/107:53:331
9950430,0irq/345-48484000-21swapper/010:21:550
81430,0rcu_preempt3-21ksoftirqd/011:18:080
81430,0rcu_preempt3-21ksoftirqd/008:38:370
81430,0rcu_preempt10960-21ssh09:31:281
81430,0rcu_preempt10782-21kworker/0:207:36:410
12510994313,0cyclictest10050irq/346-484840010:14:321
10050430,0irq/346-484840012489-21ssh10:06:290
81420,0rcu_preempt3-21ksoftirqd/007:12:460
81420,0rcu_preempt19-21ksoftirqd/109:02:341
81420,0rcu_preempt19-21ksoftirqd/107:02:481
81420,0rcu_preempt0-21swapper/111:42:311
1250999423,0cyclictest15795-21ping07:42:530
81410,0rcu_preempt3-21ksoftirqd/007:50:590
81410,0rcu_preempt3-21ksoftirqd/007:22:490
81410,0rcu_preempt19-21ksoftirqd/109:36:141
81410,0rcu_preempt19-21ksoftirqd/108:28:001
81400,0rcu_preempt19-21ksoftirqd/107:07:581
81400,0rcu_preempt15293-21meminfo08:52:551
1250999391,0cyclictest15795-21ping07:27:520
81380,0rcu_preempt19-21ksoftirqd/109:02:561
81380,0rcu_preempt0-21swapper/108:32:571
81360,0rcu_preempt19-21ksoftirqd/107:12:581
81350,0rcu_preempt19-21ksoftirqd/107:47:511
81340,0rcu_preempt15795-21ping07:38:010
1250999332,0cyclictest17127-21runrttasks07:19:160
1250999332,0cyclictest17127-21runrttasks07:19:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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