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2025-11-04 - 06:51

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Tue Nov 04, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81990,0rcu_preempt4005-21head22:10:231
81970,0rcu_preempt3-21ksoftirqd/000:13:260
81960,0rcu_preempt0-21swapper/123:56:061
81960,0rcu_preempt0-21swapper/121:10:131
81960,0rcu_preempt0-21swapper/100:20:521
81960,0rcu_preempt0-21swapper/100:10:441
81940,0rcu_preempt19-21ksoftirqd/121:14:551
81930,0rcu_preempt3-21ksoftirqd/021:17:290
81930,0rcu_preempt19-21ksoftirqd/100:07:321
81920,0rcu_preempt19-21ksoftirqd/122:08:261
81910,0rcu_preempt19-21ksoftirqd/100:15:021
81910,0rcu_preempt0-21swapper/121:45:581
81900,0rcu_preempt19-21ksoftirqd/122:46:461
81900,0rcu_preempt0-21swapper/123:33:231
81900,0rcu_preempt0-21swapper/123:17:531
81900,0rcu_preempt0-21swapper/100:39:381
81880,0rcu_preempt19-21ksoftirqd/123:24:351
81870,0rcu_preempt19-21ksoftirqd/122:27:501
81870,0rcu_preempt19-21ksoftirqd/122:24:331
81860,0rcu_preempt19-21ksoftirqd/123:46:241
81860,0rcu_preempt19-21ksoftirqd/123:42:211
81860,0rcu_preempt19-21ksoftirqd/121:29:151
81860,0rcu_preempt0-21swapper/121:34:301
81850,0rcu_preempt19-21ksoftirqd/123:37:151
81840,0rcu_preempt19-21ksoftirqd/123:51:261
81840,0rcu_preempt19-21ksoftirqd/123:08:411
81840,0rcu_preempt19-21ksoftirqd/122:34:281
81820,0rcu_preempt3884-21users22:50:221
81820,0rcu_preempt19-21ksoftirqd/122:55:441
81820,0rcu_preempt19-21ksoftirqd/122:17:371
81820,0rcu_preempt19-21ksoftirqd/121:54:161
81820,0rcu_preempt19-21ksoftirqd/120:26:181
81810,0rcu_preempt19-21ksoftirqd/122:40:041
81800,0rcu_preempt19-21ksoftirqd/123:00:451
81800,0rcu_preempt19-21ksoftirqd/122:04:071
81790,0rcu_preempt19-21ksoftirqd/100:30:041
81780,0rcu_preempt19-21ksoftirqd/123:29:251
12992780,0sleep010050irq/346-484840020:12:290
81770,0rcu_preempt19-21ksoftirqd/121:41:321
81750,0rcu_preempt21372-21ssh23:11:551
81730,0rcu_preempt3-21ksoftirqd/023:32:240
48012730,0sleep010050irq/346-484840020:24:470
81720,0rcu_preempt26092-1kworker/1:3H00:00:201
81710,0rcu_preempt751-21rngd20:49:031
321322710,0sleep010050irq/346-484840020:08:060
321322710,0sleep010050irq/346-484840020:08:060
81700,0rcu_preempt3-21ksoftirqd/022:04:070
81700,0rcu_preempt0-21swapper/121:55:441
81690,0rcu_preempt3-21ksoftirqd/023:52:210
81680,0rcu_preempt3-21ksoftirqd/021:55:140
304302670,0sleep010050irq/346-484840020:02:230
81660,0rcu_preempt3-21ksoftirqd/022:55:000
81660,0rcu_preempt19-21ksoftirqd/119:33:491
81640,0rcu_preempt3-21ksoftirqd/023:05:220
81630,0rcu_preempt3-21ksoftirqd/022:06:070
81630,0rcu_preempt3-21ksoftirqd/020:30:080
81630,0rcu_preempt3-21ksoftirqd/000:04:550
81630,0rcu_preempt1248-21lldpd22:29:160
81620,0rcu_preempt3-21ksoftirqd/023:40:040
81620,0rcu_preempt19-21ksoftirqd/120:18:031
81620,0rcu_preempt11031-21apt-get23:00:050
298452620,0sleep09950irq/345-484840000:01:140
10050610,0irq/346-48484008849-1kworker/0:0H23:13:150
9950600,0irq/345-48484008849-1kworker/0:0H23:15:110
81600,0rcu_preempt19-21ksoftirqd/121:21:441
81600,0rcu_preempt0-21swapper/021:30:380
10050600,0irq/346-48484008849-1kworker/0:0H23:23:560
10050600,0irq/346-484840012684-21ssh21:40:220
81590,0rcu_preempt3-21ksoftirqd/021:11:120
10050590,0irq/346-484840022429-21ssh00:35:170
81580,0rcu_preempt4645-1kworker/0:2H22:53:500
81580,0rcu_preempt3-21ksoftirqd/021:45:450
10050580,0irq/346-484840021595-1kworker/0:1H21:20:090
10050580,0irq/346-4848400181ktimersoftd/121:38:581
9950570,0irq/345-484840025848-21ssh23:56:210
9950570,0irq/345-484840016559-21munin-node0
9950570,0irq/345-484840015934-21ping19:35:060
10050570,0irq/346-48484004563-1kworker/0:1H20:45:170
81560,0rcu_preempt3-21ksoftirqd/021:35:040
278092560,0sleep09950irq/345-484840022:40:220
10050560,0irq/346-484840012402-1kworker/0:0H00:23:380
81550,0rcu_preempt3-21ksoftirqd/000:15:220
81550,0rcu_preempt25680-21kworker/1:019:29:091
199082550,0sleep09950irq/345-484840021:50:130
10050550,0irq/346-484840012576-1kworker/0:1H22:23:020
9950540,0irq/345-48484007310-21ssh22:15:140
9950540,0irq/345-48484000-21swapper/023:35:230
81540,0rcu_preempt3-21ksoftirqd/022:45:530
81540,0rcu_preempt3-21ksoftirqd/020:25:040
81540,0rcu_preempt28803-21ping20:20:181
81540,0rcu_preempt19-21ksoftirqd/120:59:531
29932540,0sleep010050irq/346-484840020:18:040
10050540,0irq/346-484840029816-1kworker/0:0H21:25:090
10050540,0irq/346-484840025486-1kworker/0:1H19:50:190
10050540,0irq/346-484840025486-1kworker/0:1H19:50:190
9950530,0irq/345-484840016363-21latency_hist20:59:520
9950530,0irq/345-48484000-21swapper/000:29:500
10050530,0irq/346-48484008849-1kworker/0:0H23:28:340
10050530,0irq/346-484840019921-1kworker/0:0H00:33:400
9950520,0irq/345-484840019101-21ssh22:30:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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