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2026-04-08 - 05:06

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 Apr 08, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt19-21ksoftirqd/121:43:531
81960,0rcu_preempt19-21ksoftirqd/121:43:531
81850,0rcu_preempt19-21ksoftirqd/121:56:131
81760,0rcu_preempt3-21ksoftirqd/022:39:010
81760,0rcu_preempt19-21ksoftirqd/122:48:481
81730,0rcu_preempt3-21ksoftirqd/023:43:540
81730,0rcu_preempt3-21ksoftirqd/021:46:330
81730,0rcu_preempt3-21ksoftirqd/021:46:330
81720,0rcu_preempt3-21ksoftirqd/021:31:510
81710,0rcu_preempt3-21ksoftirqd/022:35:290
81700,0rcu_preempt3-21ksoftirqd/021:34:590
81690,0rcu_preempt3-21ksoftirqd/022:28:580
9950630,0irq/345-48484000-21swapper/023:58:150
81630,0rcu_preempt851-21rngd23:11:580
81620,0rcu_preempt3-21ksoftirqd/023:07:040
81620,0rcu_preempt3-21ksoftirqd/021:08:370
81620,0rcu_preempt19-21ksoftirqd/121:24:071
9950610,0irq/345-48484000-21swapper/023:30:120
81610,0rcu_preempt31064-1kworker/1:2H22:43:491
81610,0rcu_preempt19-21ksoftirqd/123:41:341
9950600,0irq/345-48484000-21swapper/022:44:390
10050590,0irq/346-484840054-21kswapd000:18:380
10050590,0irq/346-48484000-21swapper/000:09:390
9950580,0irq/345-48484000-21swapper/022:10:350
81580,0rcu_preempt19-21ksoftirqd/121:48:571
81570,0rcu_preempt3-21ksoftirqd/000:24:050
81570,0rcu_preempt19-21ksoftirqd/100:15:431
91560,0rcu_sched19-21ksoftirqd/123:14:041
81560,0rcu_preempt3-21ksoftirqd/020:53:500
81560,0rcu_preempt3-21ksoftirqd/020:23:520
81560,0rcu_preempt19-21ksoftirqd/122:20:181
81560,0rcu_preempt15039-21kworker/0:020:02:390
81550,0rcu_preempt4180-21kworker/0:223:14:400
81550,0rcu_preempt19-21ksoftirqd/123:01:021
81550,0rcu_preempt19-21ksoftirqd/100:06:231
81550,0rcu_preempt12151-21cpu19:53:510
81550,0rcu_preempt0-21swapper/023:48:470
10050550,0irq/346-484840013974-1kworker/0:3H21:26:120
81540,0rcu_preempt4252-21kworker/0:121:13:460
81540,0rcu_preempt3-21ksoftirqd/023:43:170
81540,0rcu_preempt19-21ksoftirqd/123:48:151
81530,0rcu_preempt19-21ksoftirqd/122:31:231
81530,0rcu_preempt19-21ksoftirqd/119:18:571
81520,0rcu_preempt3-21ksoftirqd/023:00:270
81520,0rcu_preempt3-21ksoftirqd/000:03:490
9950510,0irq/345-48484000-21swapper/022:08:260
9950510,0irq/345-48484000-21swapper/022:08:260
81510,0rcu_preempt3-21ksoftirqd/022:50:500
81510,0rcu_preempt3-21ksoftirqd/022:22:450
81510,0rcu_preempt3-21ksoftirqd/000:36:130
81510,0rcu_preempt3-21ksoftirqd/000:02:010
81510,0rcu_preempt20258-21munin-node1
81510,0rcu_preempt19-21ksoftirqd/120:38:481
10050510,0irq/346-484840027552-1kworker/0:3H19:05:220
10050510,0irq/346-484840027552-1kworker/0:3H19:05:220
81500,0rcu_preempt3-21ksoftirqd/021:48:550
81500,0rcu_preempt3-21ksoftirqd/021:39:360
81500,0rcu_preempt3-21ksoftirqd/020:21:510
81500,0rcu_preempt3-21ksoftirqd/000:28:440
81500,0rcu_preempt3-21ksoftirqd/000:23:140
4350500,0irq/32-433000003885-21dropbear22:13:490
10050500,0irq/346-484840017680-1kworker/0:1H23:34:110
81490,0rcu_preempt32392-21kworker/0:219:53:370
81490,0rcu_preempt3-21ksoftirqd/022:23:580
81490,0rcu_preempt3-21ksoftirqd/021:20:280
81490,0rcu_preempt3-21ksoftirqd/020:05:010
81490,0rcu_preempt3-21ksoftirqd/020:05:010
81490,0rcu_preempt28465-21apt-get20:43:480
81490,0rcu_preempt19-21ksoftirqd/121:13:281
81490,0rcu_preempt19-21ksoftirqd/120:11:551
51072490,0chrt10050irq/346-484840019:31:280
81480,0rcu_preempt4252-21kworker/0:121:10:280
81480,0rcu_preempt3-21ksoftirqd/023:28:370
81480,0rcu_preempt3-21ksoftirqd/021:53:530
81480,0rcu_preempt3-21ksoftirqd/020:48:530
81480,0rcu_preempt18483-1kworker/1:2H23:30:411
81480,0rcu_preempt0-21swapper/123:21:331
10050480,0irq/346-48484000-21swapper/023:21:010
9950470,0irq/345-48484001343-1kworker/1:1H22:12:131
81470,0rcu_preempt32392-21kworker/0:219:43:370
81470,0rcu_preempt3-21ksoftirqd/022:54:460
81470,0rcu_preempt3-21ksoftirqd/020:10:330
81470,0rcu_preempt19-21ksoftirqd/121:18:491
81470,0rcu_preempt19-21ksoftirqd/119:32:461
69352470,0chrt10050irq/346-484840019:38:360
10050470,0irq/346-484840023985-21ssh22:01:010
81460,0rcu_preempt54-21kswapd023:06:291
81460,0rcu_preempt19-21ksoftirqd/119:36:341
81450,0rcu_preempt3-21ksoftirqd/020:59:000
81450,0rcu_preempt3-21ksoftirqd/020:14:370
81450,0rcu_preempt29667-21apt-get19:08:480
81450,0rcu_preempt19-21ksoftirqd/121:34:051
81450,0rcu_preempt19-21ksoftirqd/121:17:231
81450,0rcu_preempt19-21ksoftirqd/120:24:051
81440,0rcu_preempt4116-21diskmemload22:13:471
81440,0rcu_preempt3-21ksoftirqd/019:13:500
81440,0rcu_preempt19-21ksoftirqd/123:49:021
81430,0rcu_preempt19-21ksoftirqd/122:02:411
81430,0rcu_preempt19-21ksoftirqd/121:39:051
81430,0rcu_preempt19-21ksoftirqd/120:00:511
81430,0rcu_preempt19-21ksoftirqd/119:44:101
81430,0rcu_preempt19-21ksoftirqd/100:30:471
81420,0rcu_preempt19-21ksoftirqd/123:55:471
81420,0rcu_preempt19-21ksoftirqd/122:06:421
81420,0rcu_preempt19-21ksoftirqd/122:06:421
81420,0rcu_preempt19-21ksoftirqd/120:06:191
81420,0rcu_preempt19-21ksoftirqd/120:06:191
81420,0rcu_preempt19-21ksoftirqd/100:24:061
81420,0rcu_preempt13256-21grep00:34:061
81420,0rcu_preempt10864-21meminfo23:59:001
81410,0rcu_preempt4116-21diskmemload00:08:581
81410,0rcu_preempt335-21ping19:24:030
81410,0rcu_preempt3-21ksoftirqd/020:38:560
81410,0rcu_preempt3-21ksoftirqd/020:33:520
81410,0rcu_preempt19-21ksoftirqd/122:41:021
81410,0rcu_preempt19-21ksoftirqd/121:29:411
81410,0rcu_preempt19-21ksoftirqd/120:14:061
81410,0rcu_preempt19-21ksoftirqd/119:57:271
81410,0rcu_preempt19-21ksoftirqd/100:20:291
10050410,0irq/346-484840024249-21ps20:29:020
81400,0rcu_preempt335-21ping19:22:180
81400,0rcu_preempt19-21ksoftirqd/123:09:181
81400,0rcu_preempt19-21ksoftirqd/122:53:551
81400,0rcu_preempt19-21ksoftirqd/122:34:161
81400,0rcu_preempt19-21ksoftirqd/122:27:301
81400,0rcu_preempt19-21ksoftirqd/119:53:341
81400,0rcu_preempt19-21ksoftirqd/119:08:491
81400,0rcu_preempt19-21ksoftirqd/119:03:491
81400,0rcu_preempt19-21ksoftirqd/119:03:491
81390,0rcu_preempt19-21ksoftirqd/123:34:031
81390,0rcu_preempt19-21ksoftirqd/120:44:131
81380,0rcu_preempt19-21ksoftirqd/121:04:001
81380,0rcu_preempt19-21ksoftirqd/120:49:071
81380,0rcu_preempt19-21ksoftirqd/120:31:581
81380,0rcu_preempt19-21ksoftirqd/119:40:221
81370,0rcu_preempt963-21apt-get20:58:481
81370,0rcu_preempt54-21kswapd023:25:311
81370,0rcu_preempt335-21ping19:44:040
81370,0rcu_preempt19-21ksoftirqd/120:53:431
81370,0rcu_preempt19-21ksoftirqd/119:28:041
81370,0rcu_preempt19-21ksoftirqd/119:14:151
81360,0rcu_preempt19-21ksoftirqd/120:34:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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