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2026-03-27 - 14:31

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 Mar 27, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt3-21ksoftirqd/021:34:130
811080,0rcu_preempt3-21ksoftirqd/022:48:490
811030,0rcu_preempt3-21ksoftirqd/023:14:170
811030,0rcu_preempt3-21ksoftirqd/022:59:180
811000,0rcu_preempt3-21ksoftirqd/019:14:010
811000,0rcu_preempt3-21ksoftirqd/000:33:480
81960,0rcu_preempt3-21ksoftirqd/023:54:140
81960,0rcu_preempt3-21ksoftirqd/023:39:030
81910,0rcu_preempt3-21ksoftirqd/022:19:090
81900,0rcu_preempt3-21ksoftirqd/021:58:320
81900,0rcu_preempt3-21ksoftirqd/021:58:320
81900,0rcu_preempt3-21ksoftirqd/019:44:220
81890,0rcu_preempt3-21ksoftirqd/023:33:480
81890,0rcu_preempt3-21ksoftirqd/021:23:590
81890,0rcu_preempt3-21ksoftirqd/000:18:490
81880,0rcu_preempt30605-1kworker/0:0H00:04:130
81870,0rcu_preempt3-21ksoftirqd/023:11:070
81870,0rcu_preempt3-21ksoftirqd/023:11:070
81870,0rcu_preempt3-21ksoftirqd/021:48:500
81860,0rcu_preempt3-21ksoftirqd/023:08:000
81860,0rcu_preempt19-21ksoftirqd/100:14:011
81850,0rcu_preempt3-21ksoftirqd/022:53:490
81850,0rcu_preempt3-21ksoftirqd/022:53:490
81850,0rcu_preempt3-21ksoftirqd/022:39:160
81850,0rcu_preempt3-21ksoftirqd/021:59:110
81840,0rcu_preempt3-21ksoftirqd/023:18:500
81830,0rcu_preempt3-21ksoftirqd/021:48:500
81830,0rcu_preempt3-21ksoftirqd/021:09:150
81820,0rcu_preempt3-21ksoftirqd/019:58:490
81810,0rcu_preempt3-21ksoftirqd/022:13:080
81810,0rcu_preempt3-21ksoftirqd/021:31:120
81810,0rcu_preempt3-21ksoftirqd/020:54:000
81810,0rcu_preempt3-21ksoftirqd/000:34:150
81800,0rcu_preempt3-21ksoftirqd/022:24:110
81800,0rcu_preempt3-21ksoftirqd/020:08:490
81790,0rcu_preempt18506-21ls20:48:490
81770,0rcu_preempt3-21ksoftirqd/023:59:040
81770,0rcu_preempt3-21ksoftirqd/023:59:040
10050770,0irq/346-48484003-21ksoftirqd/000:17:500
81760,0rcu_preempt3-21ksoftirqd/023:34:150
81760,0rcu_preempt3-21ksoftirqd/023:28:490
81760,0rcu_preempt3-21ksoftirqd/022:34:170
81760,0rcu_preempt3-21ksoftirqd/021:38:520
81750,0rcu_preempt3-21ksoftirqd/023:44:160
81710,0rcu_preempt6003-21missed_timers20:09:130
81710,0rcu_preempt3-21ksoftirqd/019:19:210
81710,0rcu_preempt3-21ksoftirqd/019:19:210
81700,0rcu_preempt3-21ksoftirqd/022:29:130
81700,0rcu_preempt3-21ksoftirqd/021:20:350
81690,0rcu_preempt3-21ksoftirqd/021:08:490
81680,0rcu_preempt3-21ksoftirqd/022:08:450
81680,0rcu_preempt3-21ksoftirqd/000:09:040
81680,0rcu_preempt19-21ksoftirqd/122:16:031
81670,0rcu_preempt3-21ksoftirqd/019:09:080
81660,0rcu_preempt3-21ksoftirqd/021:18:350
81650,0rcu_preempt3-21ksoftirqd/019:34:260
81640,0rcu_preempt3-21ksoftirqd/022:54:160
9950630,0irq/345-4848400171rcuc/122:41:431
81630,0rcu_preempt3-21ksoftirqd/020:39:140
81630,0rcu_preempt3-21ksoftirqd/020:19:070
81630,0rcu_preempt3-21ksoftirqd/019:59:150
81630,0rcu_preempt19-21ksoftirqd/122:49:501
81630,0rcu_preempt19-21ksoftirqd/122:49:501
81630,0rcu_preempt19-21ksoftirqd/100:09:311
81620,0rcu_preempt3-21ksoftirqd/000:24:100
81610,0rcu_preempt3-21ksoftirqd/022:15:060
81610,0rcu_preempt19-21ksoftirqd/121:52:231
81600,0rcu_preempt3-21ksoftirqd/023:49:010
81600,0rcu_preempt3-21ksoftirqd/019:29:100
81600,0rcu_preempt19-21ksoftirqd/122:59:111
81600,0rcu_preempt1-21init00:24:001
81580,0rcu_preempt19-21ksoftirqd/122:29:001
81570,0rcu_preempt19-21ksoftirqd/100:19:161
81560,0rcu_preempt19-21ksoftirqd/122:34:001
81550,0rcu_preempt3-21ksoftirqd/019:28:490
81540,0rcu_preempt8601-21php-cgi23:09:051
81540,0rcu_preempt8601-21php-cgi23:09:051
81540,0rcu_preempt19-21ksoftirqd/123:43:301
81540,0rcu_preempt19-21ksoftirqd/121:33:591
81530,0rcu_preempt19-21ksoftirqd/123:24:001
81530,0rcu_preempt19-21ksoftirqd/122:09:521
81530,0rcu_preempt13602-21apt-get20:33:590
81520,0rcu_preempt3-21ksoftirqd/020:14:010
81520,0rcu_preempt3-21ksoftirqd/019:49:010
81520,0rcu_preempt3-21ksoftirqd/019:08:490
81520,0rcu_preempt30494-21kworker/1:100:29:031
81510,0rcu_preempt19-21ksoftirqd/119:59:091
81500,0rcu_preempt19-21ksoftirqd/122:46:151
81500,0rcu_preempt19-21ksoftirqd/121:29:111
81500,0rcu_preempt19-21ksoftirqd/100:08:461
81500,0rcu_preempt16901-21apt-get20:44:000
81500,0rcu_preempt14118-21ps23:14:151
81490,0rcu_preempt19-21ksoftirqd/121:19:031
81480,0rcu_preempt19-21ksoftirqd/120:09:081
81480,0rcu_preempt19-21ksoftirqd/119:44:171
81470,0rcu_preempt3-21ksoftirqd/020:24:010
81470,0rcu_preempt19-21ksoftirqd/121:14:121
9950460,0irq/345-4848400181ktimersoftd/121:12:211
81460,0rcu_preempt19-21ksoftirqd/123:29:101
81460,0rcu_preempt19-21ksoftirqd/120:14:111
81450,0rcu_preempt19-21ksoftirqd/122:05:561
10050450,0irq/346-4848400181ktimersoftd/122:25:071
81440,0rcu_preempt19-21ksoftirqd/123:57:361
81440,0rcu_preempt19-21ksoftirqd/100:34:121
177342440,0sleep116021-1kworker/1:2H19:06:311
81430,0rcu_preempt3-21ksoftirqd/020:59:160
81430,0rcu_preempt19-21ksoftirqd/120:49:001
81420,0rcu_preempt19-21ksoftirqd/123:59:151
81420,0rcu_preempt19-21ksoftirqd/123:59:151
81420,0rcu_preempt19-21ksoftirqd/123:19:581
81420,0rcu_preempt19-21ksoftirqd/121:24:141
81410,0rcu_preempt594-21kworker/1:219:14:111
81410,0rcu_preempt3-21ksoftirqd/020:33:480
81410,0rcu_preempt19-21ksoftirqd/123:38:481
81410,0rcu_preempt19-21ksoftirqd/120:24:091
81400,0rcu_preempt19-21ksoftirqd/122:02:431
81400,0rcu_preempt19-21ksoftirqd/121:43:461
10050400,0irq/346-48484003662-21ssh21:54:571
10050400,0irq/346-48484003662-21ssh21:54:571
10050400,0irq/346-484840012670-1kworker/1:3H23:47:081
81390,0rcu_preempt19-21ksoftirqd/121:04:031
19532392,0sleep12038-21latency_hist19:58:501
10050390,0irq/346-484840028555-21meminfo19:39:160
81380,0rcu_preempt19-21ksoftirqd/123:49:061
81380,0rcu_preempt19-21ksoftirqd/123:04:091
81380,0rcu_preempt19-21ksoftirqd/122:22:341
81380,0rcu_preempt19-21ksoftirqd/121:43:501
81380,0rcu_preempt19-21ksoftirqd/120:29:011
81380,0rcu_preempt19-21ksoftirqd/119:09:131
10050380,0irq/346-484840025848-21ssh22:54:001
81370,0rcu_preempt15983-21ps20:39:121
81360,0rcu_preempt19-21ksoftirqd/120:04:121
81350,0rcu_preempt31910-21ntp_states19:49:121
81350,0rcu_preempt19-21ksoftirqd/120:19:121
81340,0rcu_preempt19-21ksoftirqd/120:54:081
81340,0rcu_preempt14273-21ntp_states20:34:131
275012340,0chrt25882-1kworker/1:1H19:35:431
81330,0rcu_preempt1049-21avahi-daemon20:59:021
291812320,0sleep129164-1kworker/1:3H19:41:011
9950310,0irq/345-484840021257-21ping19:29:261
10050310,0irq/346-484840023051-21munin-node1
81300,0rcu_preempt19-21ksoftirqd/120:44:171
226792300,0chrt22616-1kworker/1:3H19:21:261
226792300,0chrt22616-1kworker/1:3H19:21:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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