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2025-11-29 - 07:29

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 Sat Nov 29, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111702980,0sleep010050irq/346-484840020:00:100
160682920,0sleep010050irq/346-484840020:15:120
296352830,0sleep19950irq/345-484840022:22:291
179512670,0sleep010050irq/346-484840020:22:380
98012660,0sleep010050irq/346-484840019:58:130
81660,0rcu_preempt3-21ksoftirqd/020:44:510
147712660,0sleep010050irq/346-484840020:13:500
81630,0rcu_preempt9364-1kworker/1:3H22:36:511
81630,0rcu_preempt3-21ksoftirqd/022:09:150
81630,0rcu_preempt19-21ksoftirqd/123:56:441
81630,0rcu_preempt19-21ksoftirqd/123:56:441
81630,0rcu_preempt19-21ksoftirqd/123:38:541
81630,0rcu_preempt19-21ksoftirqd/122:04:071
81630,0rcu_preempt19-21ksoftirqd/121:37:431
81620,0rcu_preempt19-21ksoftirqd/119:59:591
81600,0rcu_preempt54-21kswapd023:54:550
81600,0rcu_preempt54-21kswapd023:54:550
81600,0rcu_preempt19-21ksoftirqd/122:12:461
81600,0rcu_preempt19-21ksoftirqd/100:30:591
81600,0rcu_preempt19-21ksoftirqd/100:21:391
81600,0rcu_preempt19-21ksoftirqd/100:12:171
193762600,0sleep010050irq/346-484840020:25:260
81590,0rcu_preempt19-21ksoftirqd/122:52:161
81590,0rcu_preempt19-21ksoftirqd/122:52:161
81590,0rcu_preempt19-21ksoftirqd/122:15:031
81590,0rcu_preempt19-21ksoftirqd/121:56:341
81590,0rcu_preempt19-21ksoftirqd/100:19:211
81590,0rcu_preempt19-21ksoftirqd/100:19:211
81580,0rcu_preempt19-21ksoftirqd/121:44:261
81580,0rcu_preempt19-21ksoftirqd/121:44:261
81580,0rcu_preempt18491-21kworker/0:120:49:450
81580,0rcu_preempt16673-21apt-get00:04:380
81580,0rcu_preempt0-21swapper/122:27:551
81570,0rcu_preempt9731-21ping20:04:390
81570,0rcu_preempt32580-1kworker/0:3H21:09:520
13150570,0irq/301-480200021726-21sh21:34:440
81560,0rcu_preempt3-21ksoftirqd/023:34:410
81560,0rcu_preempt3-21ksoftirqd/020:34:410
81560,0rcu_preempt19-21ksoftirqd/123:49:511
10050560,0irq/346-484840023680-1kworker/0:0H21:39:480
10050560,0irq/346-484840023680-1kworker/0:0H21:39:480
10050560,0irq/346-48484002043-1kworker/0:2H21:49:530
81550,0rcu_preempt411-21diskmemload00:19:410
81550,0rcu_preempt3-21ksoftirqd/022:54:410
81550,0rcu_preempt3-21ksoftirqd/022:54:410
81550,0rcu_preempt3-21ksoftirqd/021:54:390
81550,0rcu_preempt19-21ksoftirqd/120:22:121
81550,0rcu_preempt13639-21kworker/0:122:24:490
10050550,0irq/346-48484004532-1kworker/0:2H22:31:350
9950540,0irq/345-4848400751-21rngd19:19:300
9950540,0irq/345-4848400751-21rngd19:19:300
81540,0rcu_preempt3-21ksoftirqd/023:30:000
81540,0rcu_preempt3-21ksoftirqd/023:04:550
81540,0rcu_preempt3-21ksoftirqd/022:45:350
81540,0rcu_preempt3-21ksoftirqd/000:29:410
81540,0rcu_preempt19-21ksoftirqd/121:50:001
10050540,0irq/346-48484006662-1kworker/0:1H23:54:060
10050540,0irq/346-484840014278-21ssh21:24:590
81530,0rcu_preempt3-21ksoftirqd/023:39:410
10050530,0irq/346-484840054-21kswapd022:49:590
10050530,0irq/346-484840054-21kswapd022:49:590
10050530,0irq/346-484840012832-21proc_pri23:19:570
81520,0rcu_preempt3-21ksoftirqd/022:19:240
81520,0rcu_preempt3-21ksoftirqd/019:04:450
81520,0rcu_preempt20803-21apt-get00:09:400
81520,0rcu_preempt19-21ksoftirqd/121:19:531
81520,0rcu_preempt19-21ksoftirqd/121:15:051
81520,0rcu_preempt19-21ksoftirqd/120:14:581
81520,0rcu_preempt0-21swapper/123:00:141
318502520,0chrt9950irq/345-484840019:25:001
9950510,0irq/345-4848400751-21rngd23:02:590
81510,0rcu_preempt54-21kswapd020:29:470
81510,0rcu_preempt19-21ksoftirqd/123:06:271
81510,0rcu_preempt19-21ksoftirqd/119:39:291
10050510,0irq/346-48484000-21swapper/023:19:280
10050510,0irq/346-48484000-21swapper/022:34:560
81500,0rcu_preempt3-21ksoftirqd/022:22:110
81500,0rcu_preempt19-21ksoftirqd/122:09:131
10050500,0irq/346-484840018491-21ssh21:29:590
81490,0rcu_preempt3-21ksoftirqd/021:19:450
81490,0rcu_preempt3-21ksoftirqd/021:19:050
81490,0rcu_preempt3-21ksoftirqd/019:29:390
81490,0rcu_preempt29934-21apt-get21:44:390
4350490,0irq/32-433000003-21ksoftirqd/019:24:420
10050490,0irq/346-484840023993-1kworker/0:2H23:59:310
81480,0rcu_preempt3-21ksoftirqd/000:25:060
81480,0rcu_preempt0-21swapper/121:30:211
13150480,0irq/301-48020003-21ksoftirqd/019:44:490
10050480,0irq/346-484840030234-1kworker/0:3H23:45:270
10050480,0irq/346-484840017586-1kworker/0:1H22:09:290
81470,0rcu_preempt3-21ksoftirqd/019:38:300
81470,0rcu_preempt3-21ksoftirqd/000:14:460
81470,0rcu_preempt3-21ksoftirqd/000:14:460
81470,0rcu_preempt19-21ksoftirqd/123:23:001
81470,0rcu_preempt19-21ksoftirqd/100:04:411
254462470,0sleep19950irq/345-484840022:56:011
254462470,0sleep19950irq/345-484840022:56:011
10050470,0irq/346-484840026661-1kworker/0:0H22:40:240
81460,0rcu_preempt3-21ksoftirqd/023:12:310
81460,0rcu_preempt3-21ksoftirqd/019:49:440
81460,0rcu_preempt19-21ksoftirqd/120:54:511
81460,0rcu_preempt19-21ksoftirqd/120:25:131
81460,0rcu_preempt19-21ksoftirqd/120:10:201
81460,0rcu_preempt19-21ksoftirqd/119:57:411
4350460,0irq/32-43300000751-21rngd23:24:440
10050460,0irq/346-484840023020-1kworker/0:2H20:39:290
81450,0rcu_preempt3-21ksoftirqd/019:19:280
81450,0rcu_preempt26116-21apt-get19:09:410
81450,0rcu_preempt25967-21cyclictest19:46:031
81450,0rcu_preempt19-21ksoftirqd/121:44:351
320492450,0sleep19950irq/345-484840023:43:511
81440,0rcu_preempt7446-21apt-get00:34:390
81440,0rcu_preempt20722-21kworker/0:119:43:210
10050440,0irq/346-484840029579-1kworker/0:0H20:59:290
10050440,0irq/346-484840027884-1kworker/0:1H21:59:320
81430,0rcu_preempt19-21ksoftirqd/121:09:451
81430,0rcu_preempt19-21ksoftirqd/120:08:161
81430,0rcu_preempt19-21ksoftirqd/100:29:211
9950420,0irq/345-484840029070-21unixbench_multi20:54:570
81420,0rcu_preempt9364-1kworker/1:3H22:41:191
81420,0rcu_preempt19-21ksoftirqd/123:09:331
81420,0rcu_preempt19-21ksoftirqd/122:33:421
81420,0rcu_preempt19-21ksoftirqd/119:39:481
81420,0rcu_preempt19-21ksoftirqd/119:14:451
81410,0rcu_preempt19-21ksoftirqd/123:29:451
81410,0rcu_preempt19-21ksoftirqd/123:17:221
81410,0rcu_preempt19-21ksoftirqd/120:49:191
81410,0rcu_preempt19-21ksoftirqd/119:49:481
81410,0rcu_preempt19-21ksoftirqd/119:19:311
81410,0rcu_preempt19-21ksoftirqd/119:19:311
81410,0rcu_preempt19-21ksoftirqd/100:02:151
81410,0rcu_preempt0-21swapper/120:37:421
10050410,0irq/346-484840030943-1kworker/0:2H21:04:420
81400,0rcu_preempt751-21rngd20:51:231
81400,0rcu_preempt30945-1kworker/1:4H21:03:581
81400,0rcu_preempt19-21ksoftirqd/121:25:131
81400,0rcu_preempt19-21ksoftirqd/121:08:001
81400,0rcu_preempt19-21ksoftirqd/120:29:551
81400,0rcu_preempt19-21ksoftirqd/119:29:461
81400,0rcu_preempt19-21ksoftirqd/119:04:431
81390,0rcu_preempt19-21ksoftirqd/123:44:391
81390,0rcu_preempt19-21ksoftirqd/123:28:391
81390,0rcu_preempt19-21ksoftirqd/122:47:331
81390,0rcu_preempt19-21ksoftirqd/100:36:151
81380,0rcu_preempt19-21ksoftirqd/120:43:001
81370,0rcu_preempt19-21ksoftirqd/119:11:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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