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2026-07-06 - 16:42

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Mon Jul 06, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811280,0rcu_preempt3-21ksoftirqd/012:27:100
81950,0rcu_preempt9950irq/345-484840009:59:130
81940,0rcu_preempt19-21ksoftirqd/110:48:251
81930,0rcu_preempt19-21ksoftirqd/108:22:321
81880,0rcu_preempt54-21kswapd010:42:161
81850,0rcu_preempt9950irq/345-484840012:31:160
81790,0rcu_preempt19-21ksoftirqd/110:07:201
81780,0rcu_preempt54-21kswapd012:24:081
81770,0rcu_preempt19-21ksoftirqd/110:22:231
81750,0rcu_preempt19-21ksoftirqd/109:22:201
81750,0rcu_preempt19-21ksoftirqd/109:12:381
81730,0rcu_preempt19-21ksoftirqd/111:32:201
81720,0rcu_preempt19-21ksoftirqd/109:42:281
81710,0rcu_preempt19-21ksoftirqd/112:27:511
81700,0rcu_preempt30561-21kworker/1:110:32:241
81670,0rcu_preempt6124-21ntpdc10:12:321
81670,0rcu_preempt19-21ksoftirqd/108:07:431
81660,0rcu_preempt14665-1kworker/1:1H10:58:111
81650,0rcu_preempt19-21ksoftirqd/111:37:351
81650,0rcu_preempt19-21ksoftirqd/109:58:211
81630,0rcu_preempt19-21ksoftirqd/111:29:211
81630,0rcu_preempt19-21ksoftirqd/111:13:331
81630,0rcu_preempt19-21ksoftirqd/111:13:331
81620,0rcu_preempt19-21ksoftirqd/110:54:351
81610,0rcu_preempt15099-21kworker/1:107:27:251
81600,0rcu_preempt19-21ksoftirqd/108:42:111
81580,0rcu_preempt19-21ksoftirqd/110:40:571
81580,0rcu_preempt19-21ksoftirqd/110:28:521
81580,0rcu_preempt19-21ksoftirqd/109:32:281
81570,0rcu_preempt2282-21ssh10:42:050
81570,0rcu_preempt19-21ksoftirqd/111:47:301
81570,0rcu_preempt19-21ksoftirqd/111:24:331
81570,0rcu_preempt19-21ksoftirqd/110:02:211
81570,0rcu_preempt19-21ksoftirqd/109:49:051
81570,0rcu_preempt19-21ksoftirqd/109:49:051
10050570,0irq/346-484840011455-1kworker/1:1H07:52:291
81560,0rcu_preempt9950irq/345-484840009:52:110
81560,0rcu_preempt9950irq/345-484840009:52:110
81560,0rcu_preempt19-21ksoftirqd/109:37:211
81550,0rcu_preempt19-21ksoftirqd/111:07:351
81540,0rcu_preempt3-21ksoftirqd/011:02:370
81540,0rcu_preempt19-21ksoftirqd/109:02:231
10050540,0irq/346-4848400851-21rngd10:59:360
81530,0rcu_preempt19-21ksoftirqd/111:42:431
81530,0rcu_preempt19-21ksoftirqd/111:02:221
81520,0rcu_preempt19-21ksoftirqd/110:17:211
81520,0rcu_preempt19-21ksoftirqd/110:17:211
81520,0rcu_preempt19-21ksoftirqd/109:55:171
81520,0rcu_preempt0-21swapper/111:53:431
81510,0rcu_preempt19-21ksoftirqd/112:05:211
10050510,0irq/346-484840010873-1kworker/1:1H09:19:241
9950500,0irq/345-484840011597-1kworker/1:1H12:35:531
81500,0rcu_preempt20122-21ssh09:53:480
81500,0rcu_preempt19-21ksoftirqd/112:07:301
10050500,0irq/346-4848400851-21rngd10:31:460
81490,0rcu_preempt3-21ksoftirqd/012:01:200
81490,0rcu_preempt3-21ksoftirqd/011:53:570
81490,0rcu_preempt3-21ksoftirqd/010:47:380
81490,0rcu_preempt3-21ksoftirqd/010:18:590
81490,0rcu_preempt3-21ksoftirqd/010:18:590
81490,0rcu_preempt3-21ksoftirqd/007:07:340
81490,0rcu_preempt3-21ksoftirqd/007:05:250
81490,0rcu_preempt19-21ksoftirqd/107:07:271
31019994910,0cyclictest26756-21apt-get12:12:230
81480,0rcu_preempt3-21ksoftirqd/012:06:300
81480,0rcu_preempt3-21ksoftirqd/011:37:390
81480,0rcu_preempt3-21ksoftirqd/011:26:110
81480,0rcu_preempt3-21ksoftirqd/008:27:370
81480,0rcu_preempt19-21ksoftirqd/111:57:401
3101999482,0cyclictest3718-1kworker/0:3H09:08:330
81470,0rcu_preempt6152-21ntp_states10:12:330
81470,0rcu_preempt3-21ksoftirqd/011:32:290
81470,0rcu_preempt3-21ksoftirqd/011:19:270
81470,0rcu_preempt3-21ksoftirqd/011:09:280
81470,0rcu_preempt3-21ksoftirqd/010:42:370
81470,0rcu_preempt3-21ksoftirqd/010:08:170
81470,0rcu_preempt3-21ksoftirqd/010:02:280
81470,0rcu_preempt3-21ksoftirqd/009:19:110
81470,0rcu_preempt3-21ksoftirqd/008:47:360
81470,0rcu_preempt3-21ksoftirqd/008:42:310
81470,0rcu_preempt19-21ksoftirqd/109:27:351
81470,0rcu_preempt14766-21ping08:02:291
81470,0rcu_preempt11708-21ps09:12:360
31019994713,0cyclictest17172-1kworker/0:0H12:07:330
81460,0rcu_preempt3-21ksoftirqd/011:51:580
81460,0rcu_preempt3-21ksoftirqd/010:52:120
81460,0rcu_preempt3-21ksoftirqd/010:32:330
81460,0rcu_preempt3-21ksoftirqd/009:37:300
81460,0rcu_preempt3-21ksoftirqd/007:36:220
81460,0rcu_preempt25687-21ntp_states08:27:331
81460,0rcu_preempt15901-21ps07:57:360
81450,0rcu_preempt3-21ksoftirqd/012:20:190
81450,0rcu_preempt3-21ksoftirqd/011:13:550
81450,0rcu_preempt3-21ksoftirqd/011:13:550
81450,0rcu_preempt3-21ksoftirqd/009:42:300
81450,0rcu_preempt3-21ksoftirqd/009:28:530
81450,0rcu_preempt3-21ksoftirqd/008:24:270
81450,0rcu_preempt3-21ksoftirqd/008:12:300
81450,0rcu_preempt19-21ksoftirqd/112:17:391
81450,0rcu_preempt19-21ksoftirqd/112:12:231
81450,0rcu_preempt19-21ksoftirqd/111:17:401
81450,0rcu_preempt19-21ksoftirqd/108:13:061
3101999452,0cyclictest0-21swapper/010:24:010
81440,0rcu_preempt3-21ksoftirqd/012:36:470
81440,0rcu_preempt3-21ksoftirqd/011:44:380
81440,0rcu_preempt3-21ksoftirqd/011:27:280
81440,0rcu_preempt3-21ksoftirqd/009:32:270
81440,0rcu_preempt3-21ksoftirqd/009:22:160
81440,0rcu_preempt3-21ksoftirqd/008:52:350
81440,0rcu_preempt3-21ksoftirqd/008:17:320
81440,0rcu_preempt3-21ksoftirqd/007:52:240
81440,0rcu_preempt19-21ksoftirqd/108:52:381
81440,0rcu_preempt19-21ksoftirqd/108:47:211
81430,0rcu_preempt3-21ksoftirqd/008:32:230
81430,0rcu_preempt3-21ksoftirqd/008:32:230
81430,0rcu_preempt3-21ksoftirqd/007:12:250
81430,0rcu_preempt19-21ksoftirqd/109:12:111
81430,0rcu_preempt19-21ksoftirqd/108:37:281
81420,0rcu_preempt3-21ksoftirqd/008:57:230
81420,0rcu_preempt3-21ksoftirqd/008:02:210
81420,0rcu_preempt12061-21df_abs07:47:251
81410,0rcu_preempt3695-21apt-get07:22:221
81410,0rcu_preempt3-21ksoftirqd/009:02:290
81410,0rcu_preempt19-21ksoftirqd/108:17:131
81410,0rcu_preempt0-21swapper/107:12:331
81400,0rcu_preempt3-21ksoftirqd/007:30:010
81400,0rcu_preempt19-21ksoftirqd/108:32:301
81400,0rcu_preempt19-21ksoftirqd/108:32:301
81400,0rcu_preempt19-21ksoftirqd/107:02:311
81400,0rcu_preempt14789-21kworker/1:008:57:351
3101999407,0cyclictest14766-21ping08:08:480
3101999402,0cyclictest3-21ksoftirqd/007:38:080
81390,0rcu_preempt851-21rngd07:49:130
3101999392,0cyclictest1892-21ping07:42:230
81370,0rcu_preempt19-21ksoftirqd/108:01:381
3101999372,0cyclictest1892-21ping07:17:280
81360,0rcu_preempt19-21ksoftirqd/107:40:171
3101999362,0cyclictest0-21swapper/008:37:220
3101999362,0cyclictest0-21swapper/007:25:590
10050360,0irq/346-48484001892-21ping07:32:381
81340,0rcu_preempt19-21ksoftirqd/107:20:041
10050330,0irq/346-484840010437-21runrttasks07:42:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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