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2026-05-05 - 03:15

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 Tue May 05, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81830,0rcu_preempt3-21ksoftirqd/022:28:230
81680,0rcu_preempt24786-21cyclictest20:33:270
81670,0rcu_preempt3-21ksoftirqd/022:03:390
81660,0rcu_preempt3-21ksoftirqd/019:08:310
81640,0rcu_preempt8561-21ping19:58:430
81610,0rcu_preempt3-21ksoftirqd/020:13:230
4282600,0chrt10050irq/346-484840019:32:150
111580,0rcuc/015633-1kworker/0:2H00:11:250
81570,0rcu_preempt3-21ksoftirqd/000:35:320
81570,0rcu_preempt3-21ksoftirqd/000:23:300
81560,0rcu_preempt8561-21ping20:23:350
81560,0rcu_preempt3-21ksoftirqd/023:23:120
81560,0rcu_preempt3-21ksoftirqd/000:18:270
81560,0rcu_preempt10625-1kworker/0:1H20:03:410
10050560,0irq/346-484840032301-1kworker/0:0H22:52:040
10050560,0irq/346-48484000-21swapper/022:59:000
81550,0rcu_preempt3-21ksoftirqd/021:23:360
81550,0rcu_preempt19-21ksoftirqd/119:38:111
81540,0rcu_preempt3-21ksoftirqd/022:38:210
81540,0rcu_preempt3-21ksoftirqd/020:48:380
81530,0rcu_preempt3-21ksoftirqd/023:43:280
81530,0rcu_preempt3-21ksoftirqd/023:23:410
81530,0rcu_preempt11918-1kworker/0:1H21:20:430
81520,0rcu_preempt3-21ksoftirqd/023:58:120
81520,0rcu_preempt3-21ksoftirqd/023:07:140
81520,0rcu_preempt3-21ksoftirqd/022:13:230
81520,0rcu_preempt3-21ksoftirqd/020:10:180
81520,0rcu_preempt27052-21kworker/0:121:42:110
81520,0rcu_preempt19-21ksoftirqd/100:23:451
81510,0rcu_preempt3-21ksoftirqd/023:38:320
81510,0rcu_preempt3-21ksoftirqd/023:33:370
81510,0rcu_preempt3-21ksoftirqd/022:33:330
81510,0rcu_preempt3-21ksoftirqd/020:43:350
81510,0rcu_preempt3-21ksoftirqd/000:03:320
81510,0rcu_preempt30157-1kworker/0:1H21:13:390
81510,0rcu_preempt29427-21kworker/0:019:34:590
81510,0rcu_preempt24070-21apt-get21:33:220
10050510,0irq/346-48484000-21swapper/023:30:340
81500,0rcu_preempt3-21ksoftirqd/023:53:310
81500,0rcu_preempt3-21ksoftirqd/022:44:010
81500,0rcu_preempt3-21ksoftirqd/022:08:420
81500,0rcu_preempt3-21ksoftirqd/022:08:420
81500,0rcu_preempt3-21ksoftirqd/020:18:290
81500,0rcu_preempt24628-21apt-get23:13:220
81490,0rcu_preempt8391-21df_inode22:23:280
81490,0rcu_preempt3-21ksoftirqd/021:58:120
81490,0rcu_preempt3-21ksoftirqd/021:48:120
81490,0rcu_preempt3-21ksoftirqd/021:48:110
81490,0rcu_preempt23523-21kworker/0:023:51:280
81490,0rcu_preempt18300-21kworker/0:121:10:070
10050490,0irq/346-48484000-21swapper/021:55:330
81480,0rcu_preempt8570-21kworker/0:119:57:370
81480,0rcu_preempt3-21ksoftirqd/023:08:380
81480,0rcu_preempt3-21ksoftirqd/022:22:430
81480,0rcu_preempt3-21ksoftirqd/020:38:350
81480,0rcu_preempt3-21ksoftirqd/020:28:320
81480,0rcu_preempt30308-21apt-get21:03:250
81480,0rcu_preempt19-21ksoftirqd/120:13:311
10050480,0irq/346-48484006548-21ssh22:54:000
10050480,0irq/346-484840018927-1kworker/0:0H21:28:330
81470,0rcu_preempt29273-21kworker/0:200:13:340
81470,0rcu_preempt19-21ksoftirqd/121:48:461
81470,0rcu_preempt19-21ksoftirqd/121:38:141
81470,0rcu_preempt19-21ksoftirqd/121:18:071
81460,0rcu_preempt3-21ksoftirqd/019:43:260
81460,0rcu_preempt3-21ksoftirqd/000:28:250
81460,0rcu_preempt19-21ksoftirqd/121:18:401
81460,0rcu_preempt19-21ksoftirqd/119:57:101
10050460,0irq/346-484840027086-21munin-node0
81450,0rcu_preempt5659-21apt-get19:48:230
81450,0rcu_preempt29383-21ps20:58:370
81450,0rcu_preempt19-21ksoftirqd/120:22:351
10050450,0irq/346-48484003-21ksoftirqd/019:28:110
81440,0rcu_preempt3-21ksoftirqd/019:38:240
81440,0rcu_preempt19-21ksoftirqd/123:54:261
81430,0rcu_preempt3-21ksoftirqd/019:03:380
81430,0rcu_preempt31788-21diskmemload00:28:401
81430,0rcu_preempt27008-21apt-get20:53:220
81430,0rcu_preempt25197-21ssh00:19:291
81430,0rcu_preempt2262-21ssh23:23:261
81430,0rcu_preempt19-21ksoftirqd/122:53:381
81430,0rcu_preempt19-21ksoftirqd/122:28:541
81430,0rcu_preempt19-21ksoftirqd/122:05:361
81430,0rcu_preempt19-21ksoftirqd/122:01:201
81430,0rcu_preempt19-21ksoftirqd/121:45:211
81430,0rcu_preempt19-21ksoftirqd/120:10:561
81430,0rcu_preempt19-21ksoftirqd/120:03:401
81430,0rcu_preempt19-21ksoftirqd/120:02:151
81430,0rcu_preempt16710-21ssh23:38:221
81420,0rcu_preempt5839-21df_inode00:33:261
81420,0rcu_preempt31788-21diskmemload22:23:331
81420,0rcu_preempt28260-21irqstats22:43:311
81420,0rcu_preempt19-21ksoftirqd/123:16:401
81420,0rcu_preempt19-21ksoftirqd/123:00:441
81420,0rcu_preempt19-21ksoftirqd/121:38:111
81420,0rcu_preempt19-21ksoftirqd/100:08:321
81420,0rcu_preempt19-21ksoftirqd/100:06:451
81410,0rcu_preempt54-21kswapd023:05:281
81410,0rcu_preempt28066-21ping19:18:340
81410,0rcu_preempt19-21ksoftirqd/123:47:431
81410,0rcu_preempt19-21ksoftirqd/123:33:231
81410,0rcu_preempt19-21ksoftirqd/123:10:491
81410,0rcu_preempt19-21ksoftirqd/122:42:281
81400,0rcu_preempt19-21ksoftirqd/122:48:351
81400,0rcu_preempt19-21ksoftirqd/122:36:521
81400,0rcu_preempt19-21ksoftirqd/122:13:481
81400,0rcu_preempt19-21ksoftirqd/122:10:431
81400,0rcu_preempt19-21ksoftirqd/122:10:431
81400,0rcu_preempt19-21ksoftirqd/121:57:461
81400,0rcu_preempt19-21ksoftirqd/121:30:201
81400,0rcu_preempt19-21ksoftirqd/121:24:441
81400,0rcu_preempt19-21ksoftirqd/121:08:201
81400,0rcu_preempt19-21ksoftirqd/120:39:181
81400,0rcu_preempt19-21ksoftirqd/119:52:111
81400,0rcu_preempt19-21ksoftirqd/119:23:221
81400,0rcu_preempt19-21ksoftirqd/100:02:061
9950390,0irq/345-484840023284-21apt19:03:231
81390,0rcu_preempt31788-21diskmemload23:49:161
81390,0rcu_preempt19-21ksoftirqd/120:51:131
81390,0rcu_preempt19-21ksoftirqd/120:25:161
81390,0rcu_preempt19-21ksoftirqd/119:17:331
81380,0rcu_preempt28663-21munin-node1
81380,0rcu_preempt19-21ksoftirqd/123:31:061
81380,0rcu_preempt19-21ksoftirqd/123:19:541
81380,0rcu_preempt19-21ksoftirqd/122:21:211
81380,0rcu_preempt19-21ksoftirqd/121:04:581
81380,0rcu_preempt19-21ksoftirqd/120:54:151
81380,0rcu_preempt19-21ksoftirqd/120:43:491
81380,0rcu_preempt19-21ksoftirqd/120:33:211
81380,0rcu_preempt19-21ksoftirqd/120:29:131
81370,0rcu_preempt19-21ksoftirqd/119:47:261
81370,0rcu_preempt19-21ksoftirqd/119:09:011
81360,0rcu_preempt54-21kswapd000:14:161
81330,0rcu_preempt19-21ksoftirqd/119:38:311
293552330,0sleep127746-1kworker/1:2H19:19:241
81320,0rcu_preempt28066-21ping19:28:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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