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2025-08-21 - 16:16

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 Thu Aug 21, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81770,0rcu_preempt1361-21runrttasks09:51:021
81730,0rcu_preempt54-21kswapd010:54:321
81730,0rcu_preempt19-21ksoftirqd/109:20:031
81720,0rcu_preempt28398-21ping07:26:301
9950710,0irq/345-4848400171rcuc/110:30:131
81710,0rcu_preempt19-21ksoftirqd/109:01:271
81700,0rcu_preempt753-21rngd08:35:371
81700,0rcu_preempt753-21rngd08:35:371
81700,0rcu_preempt19-21ksoftirqd/109:31:131
81700,0rcu_preempt19-21ksoftirqd/108:41:591
81690,0rcu_preempt3-21ksoftirqd/012:05:120
81690,0rcu_preempt3-21ksoftirqd/012:05:120
81680,0rcu_preempt6824-21ssh10:01:031
81680,0rcu_preempt19-21ksoftirqd/112:31:561
81670,0rcu_preempt19-21ksoftirqd/112:00:301
81670,0rcu_preempt19-21ksoftirqd/111:38:091
81670,0rcu_preempt19-21ksoftirqd/111:14:051
81650,0rcu_preempt19-21ksoftirqd/111:48:041
81650,0rcu_preempt19-21ksoftirqd/111:35:581
81650,0rcu_preempt19-21ksoftirqd/110:40:211
81650,0rcu_preempt19-21ksoftirqd/110:20:441
81650,0rcu_preempt19-21ksoftirqd/109:14:001
81650,0rcu_preempt0-21swapper/112:07:531
81640,0rcu_preempt19-21ksoftirqd/109:26:141
81630,0rcu_preempt19-21ksoftirqd/112:30:441
81630,0rcu_preempt19-21ksoftirqd/112:02:521
81630,0rcu_preempt19-21ksoftirqd/112:02:521
81630,0rcu_preempt19-21ksoftirqd/110:45:311
81620,0rcu_preempt19-21ksoftirqd/110:21:251
81610,0rcu_preempt19-21ksoftirqd/112:23:421
81610,0rcu_preempt19-21ksoftirqd/111:18:131
9950600,0irq/345-484840031848-1kworker/1:3H09:08:101
9950600,0irq/345-484840031848-1kworker/1:3H09:08:101
81600,0rcu_preempt3-21ksoftirqd/010:56:180
81600,0rcu_preempt27132-1kworker/0:0H07:21:410
81590,0rcu_preempt19-21ksoftirqd/110:10:431
81580,0rcu_preempt3-21ksoftirqd/009:36:260
81580,0rcu_preempt19-21ksoftirqd/111:29:451
81580,0rcu_preempt19-21ksoftirqd/109:44:041
81570,0rcu_preempt54-21kswapd010:31:181
81560,0rcu_preempt0-21swapper/111:45:401
10050550,0irq/346-484840024380-1kworker/0:1H11:56:530
81540,0rcu_preempt3-21ksoftirqd/012:31:180
81540,0rcu_preempt19-21ksoftirqd/108:01:171
81530,0rcu_preempt3-21ksoftirqd/012:26:170
81530,0rcu_preempt32118-1kworker/0:2H07:31:210
81530,0rcu_preempt23015-21kworker/0:010:23:320
9950520,0irq/345-484840023307-1kworker/0:2H09:46:280
9950520,0irq/345-4848400181ktimersoftd/110:01:281
81520,0rcu_preempt22866-21kworker/0:109:58:120
81520,0rcu_preempt12268-21kworker/0:108:10:260
81520,0rcu_preempt12268-21kworker/0:108:10:260
9950510,0irq/345-48484000-21swapper/012:20:000
81510,0rcu_preempt3-21ksoftirqd/010:13:050
81510,0rcu_preempt3-21ksoftirqd/008:03:420
81510,0rcu_preempt19-21ksoftirqd/107:56:191
81500,0rcu_preempt3-21ksoftirqd/011:11:270
81500,0rcu_preempt3-21ksoftirqd/010:16:180
81500,0rcu_preempt3-21ksoftirqd/009:32:530
81500,0rcu_preempt3-21ksoftirqd/009:21:160
81500,0rcu_preempt23015-21kworker/0:010:26:500
81500,0rcu_preempt19-21ksoftirqd/108:21:331
10050500,0irq/346-48484000-21swapper/011:06:280
9950490,0irq/345-4848400181ktimersoftd/110:13:291
81490,0rcu_preempt3-21ksoftirqd/011:45:260
81490,0rcu_preempt3-21ksoftirqd/008:22:130
81490,0rcu_preempt3-21ksoftirqd/008:17:550
81490,0rcu_preempt18443-21kworker/0:112:21:310
10050490,0irq/346-48484003527-21idleruntime-cro09:11:050
10050490,0irq/346-48484003527-21idleruntime-cro09:11:050
10050490,0irq/346-48484002336-21ssh09:53:510
9950480,0irq/345-48484000-21swapper/011:01:190
9950480,0irq/345-48484000-21swapper/010:46:360
81480,0rcu_preempt3-21ksoftirqd/011:26:490
81480,0rcu_preempt3-21ksoftirqd/011:21:500
81480,0rcu_preempt3-21ksoftirqd/010:08:010
81480,0rcu_preempt3-21ksoftirqd/008:11:430
81480,0rcu_preempt3-21ksoftirqd/007:52:500
81480,0rcu_preempt19-21ksoftirqd/111:51:361
81480,0rcu_preempt19-21ksoftirqd/108:06:231
81480,0rcu_preempt19-21ksoftirqd/108:06:231
10050480,0irq/346-484840014647-21ssh09:26:250
9950470,0irq/345-48484009340-1kworker/0:2H11:36:300
81470,0rcu_preempt3-21ksoftirqd/011:54:320
81470,0rcu_preempt3-21ksoftirqd/011:46:380
81470,0rcu_preempt3-21ksoftirqd/010:38:570
81470,0rcu_preempt3-21ksoftirqd/010:31:240
81470,0rcu_preempt3-21ksoftirqd/009:41:460
81470,0rcu_preempt3-21ksoftirqd/009:16:580
81470,0rcu_preempt3-21ksoftirqd/008:57:400
81470,0rcu_preempt3-21ksoftirqd/008:43:110
81470,0rcu_preempt3-21ksoftirqd/007:59:380
81470,0rcu_preempt25105-21cyclictest10:43:500
81470,0rcu_preempt19-21ksoftirqd/108:14:491
81470,0rcu_preempt19-21ksoftirqd/107:37:131
10050470,0irq/346-484840026895-21munin-node0
81460,0rcu_preempt3-21ksoftirqd/012:11:180
81460,0rcu_preempt3-21ksoftirqd/009:13:060
81460,0rcu_preempt25692-21kworker/0:111:20:040
81460,0rcu_preempt19-21ksoftirqd/111:04:381
81460,0rcu_preempt19-21ksoftirqd/108:16:241
81460,0rcu_preempt19-21ksoftirqd/107:42:291
81460,0rcu_preempt19-21ksoftirqd/107:31:111
81460,0rcu_preempt19-21ksoftirqd/107:19:311
81460,0rcu_preempt17101-21kworker/0:008:30:080
10050460,0irq/346-48484005580-1kworker/0:1H10:02:070
10050460,0irq/346-484840022752-21if_can008:36:250
81450,0rcu_preempt3-21ksoftirqd/012:06:200
81450,0rcu_preempt3-21ksoftirqd/008:55:040
81450,0rcu_preempt3-21ksoftirqd/008:55:040
81450,0rcu_preempt3-21ksoftirqd/007:50:590
81450,0rcu_preempt3-21ksoftirqd/007:50:590
81450,0rcu_preempt19-21ksoftirqd/111:08:411
81450,0rcu_preempt19-21ksoftirqd/107:06:211
10050450,0irq/346-48484009319-21ssh11:33:140
9950440,0irq/345-484840028566-21munin-node0
81440,0rcu_preempt3-21ksoftirqd/009:03:510
81440,0rcu_preempt3-21ksoftirqd/008:49:460
81440,0rcu_preempt32155-21diskmemload12:16:291
81440,0rcu_preempt25722-21apt-get08:46:171
81440,0rcu_preempt19-21ksoftirqd/107:24:011
9950430,0irq/345-48484000-21swapper/007:26:220
81430,0rcu_preempt19-21ksoftirqd/110:56:271
81430,0rcu_preempt19-21ksoftirqd/109:40:381
81430,0rcu_preempt10616-21kworker/0:207:36:440
81420,0rcu_preempt3-21ksoftirqd/010:51:110
81420,0rcu_preempt3-21ksoftirqd/008:32:110
81420,0rcu_preempt3-21ksoftirqd/008:32:110
81420,0rcu_preempt3-21ksoftirqd/007:01:060
81420,0rcu_preempt3-21ksoftirqd/007:01:060
81420,0rcu_preempt19-21ksoftirqd/107:53:491
81420,0rcu_preempt19-21ksoftirqd/107:03:251
81420,0rcu_preempt19-21ksoftirqd/107:03:251
81410,0rcu_preempt3-21ksoftirqd/007:43:570
81410,0rcu_preempt3-21ksoftirqd/007:08:390
81410,0rcu_preempt19-21ksoftirqd/111:21:261
81410,0rcu_preempt19-21ksoftirqd/107:46:261
81410,0rcu_preempt19-21ksoftirqd/107:46:261
9950400,0irq/345-48484000-21swapper/108:31:051
81400,0rcu_preempt54-21kswapd010:46:411
81400,0rcu_preempt19-21ksoftirqd/109:51:211
81400,0rcu_preempt19-21ksoftirqd/109:22:571
81390,0rcu_preempt19-21ksoftirqd/108:36:221
81390,0rcu_preempt19-21ksoftirqd/107:11:201
81380,0rcu_preempt54-21kswapd012:14:071
81350,0rcu_preempt19-21ksoftirqd/108:51:371
81350,0rcu_preempt19-21ksoftirqd/108:51:371
81330,0rcu_preempt19-21ksoftirqd/108:56:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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