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2026-03-26 - 03:36

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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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 Thu Mar 26, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81720,0rcu_preempt54-21kswapd000:31:581
81720,0rcu_preempt19-21ksoftirqd/123:03:161
81720,0rcu_preempt19-21ksoftirqd/100:21:591
81720,0rcu_preempt15653-21ssh23:11:431
81710,0rcu_preempt19-21ksoftirqd/123:38:291
81710,0rcu_preempt19-21ksoftirqd/123:27:101
81690,0rcu_preempt1493-21ssh00:35:481
81650,0rcu_preempt19-21ksoftirqd/123:54:051
81640,0rcu_preempt19-21ksoftirqd/122:11:541
81630,0rcu_preempt0-21swapper/122:46:301
81610,0rcu_preempt3-21ksoftirqd/020:09:090
81610,0rcu_preempt19-21ksoftirqd/122:39:161
81610,0rcu_preempt19-21ksoftirqd/100:24:581
10050610,0irq/346-484840020492-1kworker/0:1H21:19:000
81600,0rcu_preempt19-21ksoftirqd/123:40:091
81600,0rcu_preempt19-21ksoftirqd/121:57:211
10050600,0irq/346-4848400851-21rngd21:44:330
81590,0rcu_preempt19-21ksoftirqd/122:15:111
81590,0rcu_preempt19-21ksoftirqd/100:18:141
81560,0rcu_preempt19-21ksoftirqd/123:21:041
81550,0rcu_preempt3-21ksoftirqd/000:14:180
81540,0rcu_preempt5287-21kworker/0:220:14:560
81540,0rcu_preempt19-21ksoftirqd/121:28:541
81540,0rcu_preempt10312-21kworker/0:222:04:130
81530,0rcu_preempt3-21ksoftirqd/021:24:140
81530,0rcu_preempt3-21ksoftirqd/020:34:120
81530,0rcu_preempt1470-21runrttasks20:23:420
81530,0rcu_preempt10312-21kworker/0:222:03:370
81530,0rcu_preempt0-21swapper/121:26:581
81520,0rcu_preempt3-21ksoftirqd/023:30:180
81520,0rcu_preempt3-21ksoftirqd/023:22:270
81520,0rcu_preempt3-21ksoftirqd/022:44:160
81520,0rcu_preempt3-21ksoftirqd/021:39:000
81520,0rcu_preempt3-21ksoftirqd/021:39:000
81520,0rcu_preempt3-21ksoftirqd/019:59:000
81520,0rcu_preempt19-21ksoftirqd/122:24:071
81520,0rcu_preempt19-21ksoftirqd/121:14:131
81520,0rcu_preempt0-21swapper/121:37:441
9950510,0irq/345-484840023793-21diskmemload23:15:380
81510,0rcu_preempt3-21ksoftirqd/023:47:420
81510,0rcu_preempt3-21ksoftirqd/021:13:290
81510,0rcu_preempt19448-21kworker/0:119:16:450
10050510,0irq/346-48484000-21swapper/000:23:430
9950500,0irq/345-4848400171rcuc/123:49:051
81500,0rcu_preempt9921-21kworker/0:222:41:250
81500,0rcu_preempt3-21ksoftirqd/023:59:140
81500,0rcu_preempt3-21ksoftirqd/022:59:010
81500,0rcu_preempt3-21ksoftirqd/000:34:200
81500,0rcu_preempt29973-21kworker/0:122:27:580
81500,0rcu_preempt27820-21ssh00:29:180
81500,0rcu_preempt20381-21meminfo23:49:110
81500,0rcu_preempt19-21ksoftirqd/123:59:151
81500,0rcu_preempt19-21ksoftirqd/119:34:211
81500,0rcu_preempt19-21ksoftirqd/119:14:031
81490,0rcu_preempt9780-21kworker/0:023:39:130
81490,0rcu_preempt3-21ksoftirqd/022:49:120
81490,0rcu_preempt3-21ksoftirqd/022:31:140
81490,0rcu_preempt3-21ksoftirqd/020:05:540
81490,0rcu_preempt3-21ksoftirqd/019:04:070
81490,0rcu_preempt19-21ksoftirqd/120:18:501
81490,0rcu_preempt19-21ksoftirqd/119:44:221
81490,0rcu_preempt19-21ksoftirqd/100:03:531
81490,0rcu_preempt18797-21kworker/0:221:03:020
81490,0rcu_preempt13641-21kworker/1:022:29:101
81490,0rcu_preempt0-21swapper/121:49:481
10050490,0irq/346-484840018611-1kworker/0:0H20:55:140
10050490,0irq/346-484840010426-21munin-node0
9950480,0irq/345-48484000-21swapper/022:10:500
81480,0rcu_preempt375-21ping20:14:091
81480,0rcu_preempt3-21ksoftirqd/022:56:090
81480,0rcu_preempt3-21ksoftirqd/021:58:010
81480,0rcu_preempt3-21ksoftirqd/021:48:520
81480,0rcu_preempt3-21ksoftirqd/021:36:590
81480,0rcu_preempt3-21ksoftirqd/020:24:160
81480,0rcu_preempt3-21ksoftirqd/019:51:510
81480,0rcu_preempt3-21ksoftirqd/019:39:220
81480,0rcu_preempt3-21ksoftirqd/000:25:060
81480,0rcu_preempt23793-21diskmemload23:23:510
81480,0rcu_preempt19-21ksoftirqd/120:09:181
81480,0rcu_preempt10974-21kworker/0:121:16:040
81470,0rcu_preempt32381-21taskset23:29:011
81470,0rcu_preempt3-21ksoftirqd/023:04:530
81470,0rcu_preempt29839-21kworker/0:020:31:570
81470,0rcu_preempt19-21ksoftirqd/122:02:111
81470,0rcu_preempt19-21ksoftirqd/120:54:031
81470,0rcu_preempt19-21ksoftirqd/119:59:101
81470,0rcu_preempt19-21ksoftirqd/119:49:081
81470,0rcu_preempt19-21ksoftirqd/119:19:011
81470,0rcu_preempt13641-21kworker/1:021:39:131
81470,0rcu_preempt13641-21kworker/1:021:39:131
10050470,0irq/346-48484000-21swapper/023:37:350
9950460,0irq/345-4848400851-21rngd22:55:451
9950460,0irq/345-484840023802-21idleruntime-cro21:08:501
81460,0rcu_preempt19-21ksoftirqd/123:44:101
81460,0rcu_preempt19-21ksoftirqd/120:03:501
81460,0rcu_preempt19-21ksoftirqd/119:27:211
81460,0rcu_preempt14086-21apt-get20:38:591
81450,0rcu_preempt3-21ksoftirqd/019:12:430
81450,0rcu_preempt29839-21kworker/0:020:39:390
81450,0rcu_preempt26100-21apt-get21:43:591
81450,0rcu_preempt24915-21kworker/0:219:44:130
81450,0rcu_preempt19-21ksoftirqd/122:52:231
81450,0rcu_preempt19-21ksoftirqd/120:34:001
81450,0rcu_preempt19-21ksoftirqd/119:29:121
81450,0rcu_preempt19-21ksoftirqd/119:03:591
81450,0rcu_preempt12299-21munin-run23:08:491
10050450,0irq/346-48484002788-21ssh00:04:130
10050450,0irq/346-484840023451-21ssh22:14:060
10050450,0irq/346-484840015779-21ssh21:33:330
9950440,0irq/345-48484001470-21runrttasks23:09:230
81440,0rcu_preempt3-21ksoftirqd/023:54:110
81440,0rcu_preempt29839-21kworker/0:020:44:570
81440,0rcu_preempt23793-21diskmemload22:34:081
81440,0rcu_preempt19-21ksoftirqd/121:19:051
10050440,0irq/346-48484007148-21munin-node0
81430,0rcu_preempt19-21ksoftirqd/123:14:081
81430,0rcu_preempt19-21ksoftirqd/122:18:591
81430,0rcu_preempt19-21ksoftirqd/121:09:051
81430,0rcu_preempt19-21ksoftirqd/120:29:021
81430,0rcu_preempt19-21ksoftirqd/119:55:151
81430,0rcu_preempt19-21ksoftirqd/100:09:141
81420,0rcu_preempt20852-21df_abs20:59:031
81420,0rcu_preempt19-21ksoftirqd/122:04:091
81420,0rcu_preempt19-21ksoftirqd/120:24:201
81420,0rcu_preempt19-21ksoftirqd/119:39:141
188352420,0chrt18611-1kworker/0:0H20:53:380
10050420,0irq/346-484840028051-21rm22:18:570
81410,0rcu_preempt3-21ksoftirqd/021:04:230
81410,0rcu_preempt19-21ksoftirqd/119:13:501
10050410,0irq/346-484840031291-1kworker/0:1H19:54:110
81400,0rcu_preempt3-21ksoftirqd/019:29:020
81400,0rcu_preempt19-21ksoftirqd/120:44:131
10050400,0irq/346-484840022381-21irqstats19:24:140
81380,0rcu_preempt19-21ksoftirqd/120:49:021
81370,0rcu_preempt3-21ksoftirqd/019:34:060
9950350,0irq/345-48484000-21swapper/019:23:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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