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2026-03-11 - 16:30

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 Wed Mar 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81830,0rcu_preempt3-21ksoftirqd/010:15:510
81760,0rcu_preempt3-21ksoftirqd/011:48:180
81760,0rcu_preempt3-21ksoftirqd/010:46:400
81750,0rcu_preempt19-21ksoftirqd/110:33:181
81740,0rcu_preempt3-21ksoftirqd/012:27:130
81740,0rcu_preempt3-21ksoftirqd/009:52:500
81730,0rcu_preempt3-21ksoftirqd/011:18:140
81720,0rcu_preempt3-21ksoftirqd/010:04:050
81710,0rcu_preempt3-21ksoftirqd/012:38:270
81710,0rcu_preempt3-21ksoftirqd/010:42:590
81710,0rcu_preempt19-21ksoftirqd/110:50:571
81690,0rcu_preempt3-21ksoftirqd/012:19:150
81680,0rcu_preempt3-21ksoftirqd/011:19:220
81680,0rcu_preempt19-21ksoftirqd/111:39:481
1004899681,0cyclictest7092-1kworker/0:0H09:33:300
1004899676,0cyclictest5793-21basename12:14:030
81630,0rcu_preempt7532-21kworker/0:112:06:010
1004899632,0cyclictest16622-1kworker/0:1H10:49:460
81620,0rcu_preempt3-21ksoftirqd/007:59:290
81600,0rcu_preempt19-21ksoftirqd/111:15:331
81590,0rcu_preempt19-21ksoftirqd/108:14:201
81580,0rcu_preempt26230-21ping08:09:140
81580,0rcu_preempt19-21ksoftirqd/109:24:311
1004899582,0cyclictest13331-21ping07:24:170
1004899582,0cyclictest13331-21ping07:24:170
81570,0rcu_preempt26796-21dropbear07:59:161
81560,0rcu_preempt3-21ksoftirqd/011:29:120
81560,0rcu_preempt3-21ksoftirqd/011:04:230
81560,0rcu_preempt3-21ksoftirqd/009:09:130
81550,0rcu_preempt3-21ksoftirqd/012:14:040
10050550,0irq/346-484840054-21kswapd009:25:180
81540,0rcu_preempt19-21ksoftirqd/110:24:291
81530,0rcu_preempt3-21ksoftirqd/008:59:280
81530,0rcu_preempt19-21ksoftirqd/111:44:271
81530,0rcu_preempt19-21ksoftirqd/110:09:201
81530,0rcu_preempt19-21ksoftirqd/107:29:371
1004899532,0cyclictest0-21swapper/011:09:360
81520,0rcu_preempt3-21ksoftirqd/010:59:190
81520,0rcu_preempt3-21ksoftirqd/009:39:210
81520,0rcu_preempt3-21ksoftirqd/008:54:230
81520,0rcu_preempt3-21ksoftirqd/008:14:160
81520,0rcu_preempt19-21ksoftirqd/110:18:561
81510,0rcu_preempt54-21kswapd008:44:270
81510,0rcu_preempt3-21ksoftirqd/012:02:590
81510,0rcu_preempt3-21ksoftirqd/009:19:230
81510,0rcu_preempt11832-21apt-get07:14:130
81500,0rcu_preempt3-21ksoftirqd/010:35:060
81500,0rcu_preempt3-21ksoftirqd/009:34:270
81500,0rcu_preempt22626-21ssh12:30:110
81500,0rcu_preempt19-21ksoftirqd/108:24:291
9950490,0irq/345-48484003-21ksoftirqd/011:39:090
81490,0rcu_preempt3-21ksoftirqd/009:59:170
81490,0rcu_preempt3-21ksoftirqd/009:54:210
81490,0rcu_preempt3-21ksoftirqd/008:42:210
81490,0rcu_preempt3-21ksoftirqd/008:29:280
81490,0rcu_preempt3-21ksoftirqd/008:04:190
81490,0rcu_preempt2052-21ssh11:37:050
81490,0rcu_preempt19-21ksoftirqd/111:56:461
81490,0rcu_preempt19-21ksoftirqd/111:19:131
81490,0rcu_preempt19-21ksoftirqd/110:04:151
81480,0rcu_preempt3-21ksoftirqd/011:54:220
81480,0rcu_preempt3-21ksoftirqd/011:25:030
81480,0rcu_preempt3-21ksoftirqd/008:24:260
81480,0rcu_preempt3-21ksoftirqd/008:20:240
81480,0rcu_preempt26230-21ping07:57:150
81480,0rcu_preempt19680-1kworker/1:1H09:13:481
81480,0rcu_preempt19-21ksoftirqd/109:56:311
81480,0rcu_preempt19-21ksoftirqd/108:04:241
10050480,0irq/346-484840054-21kswapd010:29:270
10050480,0irq/346-48484000-21swapper/010:19:340
81470,0rcu_preempt3-21ksoftirqd/010:26:340
81470,0rcu_preempt3-21ksoftirqd/010:09:320
81470,0rcu_preempt3-21ksoftirqd/009:17:040
81470,0rcu_preempt19-21ksoftirqd/110:19:131
81470,0rcu_preempt19-21ksoftirqd/108:39:131
81460,0rcu_preempt3-21ksoftirqd/009:44:190
81460,0rcu_preempt19-21ksoftirqd/109:14:161
81460,0rcu_preempt19-21ksoftirqd/108:19:201
81460,0rcu_preempt19-21ksoftirqd/108:10:041
81460,0rcu_preempt10193-21apt-get07:09:140
81450,0rcu_preempt5835-21runrttasks11:08:321
81450,0rcu_preempt3-21ksoftirqd/008:49:260
81450,0rcu_preempt3-21ksoftirqd/007:06:070
81450,0rcu_preempt28681-21ssh09:53:261
81450,0rcu_preempt19-21ksoftirqd/111:49:271
81450,0rcu_preempt19-21ksoftirqd/111:49:271
81450,0rcu_preempt19-21ksoftirqd/109:34:271
81450,0rcu_preempt19-21ksoftirqd/109:29:271
9950440,0irq/345-48484000-21swapper/010:54:330
81440,0rcu_preempt3-21ksoftirqd/009:04:290
81440,0rcu_preempt3-21ksoftirqd/008:34:220
81440,0rcu_preempt19-21ksoftirqd/112:16:391
81440,0rcu_preempt19-21ksoftirqd/109:44:151
10050440,0irq/346-48484003-21ksoftirqd/007:35:430
81430,0rcu_preempt985-1kworker/1:1H10:34:151
81430,0rcu_preempt7532-21kworker/0:111:52:060
81430,0rcu_preempt7532-21kworker/0:111:52:060
81430,0rcu_preempt19-21ksoftirqd/111:34:211
81430,0rcu_preempt19-21ksoftirqd/110:03:171
81430,0rcu_preempt19-21ksoftirqd/107:39:211
81420,0rcu_preempt19-21ksoftirqd/112:35:521
81420,0rcu_preempt19-21ksoftirqd/112:26:481
81420,0rcu_preempt19-21ksoftirqd/112:10:201
81420,0rcu_preempt19-21ksoftirqd/112:07:211
81420,0rcu_preempt19-21ksoftirqd/109:39:041
81420,0rcu_preempt19-21ksoftirqd/109:19:381
81420,0rcu_preempt19-21ksoftirqd/107:24:191
81420,0rcu_preempt19-21ksoftirqd/107:24:191
81420,0rcu_preempt17059-21diskmemload12:29:181
81410,0rcu_preempt851-21rngd09:07:011
81410,0rcu_preempt19-21ksoftirqd/112:03:581
81410,0rcu_preempt19-21ksoftirqd/110:39:051
81410,0rcu_preempt19-21ksoftirqd/107:57:481
81410,0rcu_preempt10046-21cyclictest12:20:221
81400,0rcu_preempt4115-1kworker/1:1H11:09:301
81400,0rcu_preempt3-21ksoftirqd/007:24:000
81400,0rcu_preempt22857-1kworker/1:1H07:47:111
81400,0rcu_preempt19-21ksoftirqd/111:01:581
81400,0rcu_preempt19-21ksoftirqd/110:55:121
81400,0rcu_preempt19-21ksoftirqd/108:46:311
81400,0rcu_preempt19-21ksoftirqd/108:34:211
81400,0rcu_preempt19-21ksoftirqd/107:14:291
81400,0rcu_preempt13331-21ping07:39:160
1699400,0migration/19305-21munin-node1
81390,0rcu_preempt19-21ksoftirqd/111:27:231
81390,0rcu_preempt19-21ksoftirqd/110:49:021
81390,0rcu_preempt17511-21processes07:29:350
81390,0rcu_preempt13331-21ping07:44:350
81380,0rcu_preempt19-21ksoftirqd/111:31:011
81380,0rcu_preempt19-21ksoftirqd/109:03:301
81380,0rcu_preempt19-21ksoftirqd/108:53:091
81380,0rcu_preempt19-21ksoftirqd/107:51:471
81370,0rcu_preempt19-21ksoftirqd/108:56:591
81370,0rcu_preempt19-21ksoftirqd/108:32:331
81360,0rcu_preempt3-21ksoftirqd/007:49:260
81360,0rcu_preempt19-21ksoftirqd/107:09:581
81340,0rcu_preempt19-21ksoftirqd/107:19:281
198372330,0sleep119566-1kworker/1:2H07:38:371
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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