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2026-09-04 - 20:33

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 highest latencies:
System rackaslot5s.osadl.org (updated Fri Sep 04, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81920,0rcu_preempt3-21ksoftirqd/008:21:020
81900,0rcu_preempt19-21ksoftirqd/108:01:071
81900,0rcu_preempt19-21ksoftirqd/108:01:071
81850,0rcu_preempt19-21ksoftirqd/112:10:511
81800,0rcu_preempt2532-21kworker/0:010:24:290
81790,0rcu_preempt4945-21kworker/0:010:57:320
81790,0rcu_preempt4945-21kworker/0:010:57:320
81790,0rcu_preempt2532-21kworker/0:010:16:430
10050790,0irq/346-484840041ktimersoftd/008:19:260
81750,0rcu_preempt3-21ksoftirqd/010:44:440
81740,0rcu_preempt3-21ksoftirqd/012:34:550
81740,0rcu_preempt3-21ksoftirqd/009:32:070
81740,0rcu_preempt3-21ksoftirqd/009:19:370
81740,0rcu_preempt3-21ksoftirqd/009:17:040
81740,0rcu_preempt19-21ksoftirqd/109:59:301
81730,0rcu_preempt3-21ksoftirqd/010:50:290
81730,0rcu_preempt3-21ksoftirqd/010:50:290
81730,0rcu_preempt3-21ksoftirqd/010:04:180
81720,0rcu_preempt3-21ksoftirqd/011:49:050
81720,0rcu_preempt3-21ksoftirqd/011:29:250
81720,0rcu_preempt3-21ksoftirqd/011:18:050
81720,0rcu_preempt3-21ksoftirqd/010:39:340
81720,0rcu_preempt3-21ksoftirqd/009:59:250
81720,0rcu_preempt3-21ksoftirqd/009:47:480
81720,0rcu_preempt3-21ksoftirqd/009:47:480
81720,0rcu_preempt3-21ksoftirqd/009:42:480
81710,0rcu_preempt3-21ksoftirqd/012:32:300
81710,0rcu_preempt3-21ksoftirqd/012:18:440
81710,0rcu_preempt3-21ksoftirqd/012:10:510
81710,0rcu_preempt3-21ksoftirqd/011:56:190
81710,0rcu_preempt3-21ksoftirqd/011:09:080
81710,0rcu_preempt3-21ksoftirqd/010:14:180
81710,0rcu_preempt3-21ksoftirqd/009:36:510
81710,0rcu_preempt3-21ksoftirqd/009:13:140
81700,0rcu_preempt3-21ksoftirqd/012:26:500
81700,0rcu_preempt3-21ksoftirqd/012:19:450
81700,0rcu_preempt3-21ksoftirqd/010:31:570
81700,0rcu_preempt19-21ksoftirqd/108:19:261
81690,0rcu_preempt3-21ksoftirqd/011:22:410
81690,0rcu_preempt3-21ksoftirqd/010:20:210
81690,0rcu_preempt3-21ksoftirqd/009:25:180
81690,0rcu_preempt19-21ksoftirqd/111:05:081
81690,0rcu_preempt19-21ksoftirqd/110:39:261
81680,0rcu_preempt3-21ksoftirqd/011:35:260
81680,0rcu_preempt3-21ksoftirqd/011:13:120
81680,0rcu_preempt3-21ksoftirqd/010:35:400
81680,0rcu_preempt3-21ksoftirqd/009:50:380
81670,0rcu_preempt3-21ksoftirqd/012:04:080
81670,0rcu_preempt3-21ksoftirqd/010:06:310
81670,0rcu_preempt19-21ksoftirqd/109:45:061
81670,0rcu_preempt19-21ksoftirqd/109:45:061
81660,0rcu_preempt3-21ksoftirqd/011:41:310
81660,0rcu_preempt19-21ksoftirqd/111:19:471
81660,0rcu_preempt19-21ksoftirqd/111:00:171
3140999661,0cyclictest4224-1kworker/0:1H11:52:510
81650,0rcu_preempt19-21ksoftirqd/108:59:411
81630,0rcu_preempt3-21ksoftirqd/011:01:060
81630,0rcu_preempt19-21ksoftirqd/112:33:441
81620,0rcu_preempt3-21ksoftirqd/008:24:400
81620,0rcu_preempt31408-21cyclictest12:25:081
81580,0rcu_preempt19-21ksoftirqd/112:04:471
81560,0rcu_preempt9950irq/345-484840011:52:061
81560,0rcu_preempt19-21ksoftirqd/112:35:511
81560,0rcu_preempt19-21ksoftirqd/111:55:141
81550,0rcu_preempt19-21ksoftirqd/109:29:211
81540,0rcu_preempt19-21ksoftirqd/107:44:571
81530,0rcu_preempt3-21ksoftirqd/012:09:260
81530,0rcu_preempt3-21ksoftirqd/008:44:370
81520,0rcu_preempt3-21ksoftirqd/011:29:520
81520,0rcu_preempt3-21ksoftirqd/009:04:480
81520,0rcu_preempt3-21ksoftirqd/009:04:480
81520,0rcu_preempt19-21ksoftirqd/108:06:521
81510,0rcu_preempt19-21ksoftirqd/108:24:381
81500,0rcu_preempt3-21ksoftirqd/008:29:410
81500,0rcu_preempt3-21ksoftirqd/007:49:440
81500,0rcu_preempt19-21ksoftirqd/111:13:561
81500,0rcu_preempt19-21ksoftirqd/110:19:491
81500,0rcu_preempt15171-21ping07:59:550
81500,0rcu_preempt15171-21ping07:59:550
81490,0rcu_preempt3-21ksoftirqd/007:14:420
81490,0rcu_preempt3-21ksoftirqd/007:09:450
81480,0rcu_preempt19-21ksoftirqd/109:57:461
81480,0rcu_preempt19-21ksoftirqd/107:54:501
81470,0rcu_preempt3-21ksoftirqd/008:04:490
81470,0rcu_preempt2287-21ping07:44:360
81470,0rcu_preempt19-21ksoftirqd/109:37:211
81470,0rcu_preempt19-21ksoftirqd/109:14:501
81470,0rcu_preempt19-21ksoftirqd/109:13:561
81470,0rcu_preempt19-21ksoftirqd/108:24:111
81470,0rcu_preempt15171-21ping07:58:430
81460,0rcu_preempt3-21ksoftirqd/008:11:350
81460,0rcu_preempt3-21ksoftirqd/008:11:350
81460,0rcu_preempt19-21ksoftirqd/108:13:301
81460,0rcu_preempt19-21ksoftirqd/108:13:301
81460,0rcu_preempt19-21ksoftirqd/107:39:361
1699460,0migration/113035-21runrttasks11:26:271
81450,0rcu_preempt3-21ksoftirqd/008:54:440
81450,0rcu_preempt31965-21apt-get08:49:370
81450,0rcu_preempt19-21ksoftirqd/111:39:001
81450,0rcu_preempt19-21ksoftirqd/111:15:071
81450,0rcu_preempt19-21ksoftirqd/110:53:051
81450,0rcu_preempt19-21ksoftirqd/110:53:051
81450,0rcu_preempt19-21ksoftirqd/107:34:531
81450,0rcu_preempt19-21ksoftirqd/107:25:511
81450,0rcu_preempt19-21ksoftirqd/107:20:201
81440,0rcu_preempt19-21ksoftirqd/111:39:451
81440,0rcu_preempt19-21ksoftirqd/111:33:221
81440,0rcu_preempt19-21ksoftirqd/110:57:061
81440,0rcu_preempt19-21ksoftirqd/110:57:061
81440,0rcu_preempt19-21ksoftirqd/109:51:521
81440,0rcu_preempt0-21swapper/110:10:301
81430,0rcu_preempt3-21ksoftirqd/007:04:350
81430,0rcu_preempt19-21ksoftirqd/110:24:461
81430,0rcu_preempt19-21ksoftirqd/107:04:521
81420,0rcu_preempt5977-21diskmemload10:15:071
81420,0rcu_preempt54-21kswapd008:34:441
81420,0rcu_preempt3-21ksoftirqd/008:39:400
81420,0rcu_preempt3-21ksoftirqd/008:34:500
81420,0rcu_preempt19-21ksoftirqd/111:44:531
81420,0rcu_preempt19-21ksoftirqd/110:08:251
81420,0rcu_preempt19-21ksoftirqd/107:29:311
81420,0rcu_preempt1916-21kworker/1:207:49:371
10050420,0irq/346-48484000-21swapper/007:24:250
81410,0rcu_preempt3-21ksoftirqd/009:02:280
81410,0rcu_preempt2287-21ping07:24:380
81410,0rcu_preempt19-21ksoftirqd/112:18:311
81410,0rcu_preempt19-21ksoftirqd/110:45:021
81410,0rcu_preempt19-21ksoftirqd/110:39:361
81410,0rcu_preempt19-21ksoftirqd/110:29:361
81410,0rcu_preempt1445-21runrttasks08:49:381
81410,0rcu_preempt10436-1kworker/1:0H11:59:361
81400,0rcu_preempt3-21ksoftirqd/007:39:560
81400,0rcu_preempt3-21ksoftirqd/007:38:240
81400,0rcu_preempt3-21ksoftirqd/007:30:330
81400,0rcu_preempt19-21ksoftirqd/109:43:511
81390,0rcu_preempt19-21ksoftirqd/109:33:081
81390,0rcu_preempt19-21ksoftirqd/109:06:241
81390,0rcu_preempt19-21ksoftirqd/109:06:241
81390,0rcu_preempt19-21ksoftirqd/108:42:031
81390,0rcu_preempt19-21ksoftirqd/108:29:361
81390,0rcu_preempt19-21ksoftirqd/107:16:121
81380,0rcu_preempt19-21ksoftirqd/109:22:411
81380,0rcu_preempt19-21ksoftirqd/107:09:351
81370,0rcu_preempt19-21ksoftirqd/108:54:441
81370,0rcu_preempt19-21ksoftirqd/108:45:111
81360,0rcu_preempt19-21ksoftirqd/112:22:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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