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2025-07-13 - 11:53

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 Sun Jul 13, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050600,0irq/346-484840017995-21ssh23:32:120
315312590,0chrt10050irq/346-484840019:37:350
81580,0rcu_preempt4203-21ping20:21:420
81580,0rcu_preempt4203-21ping19:57:010
81580,0rcu_preempt12460-21kworker/0:020:57:090
81550,0rcu_preempt3-21ksoftirqd/023:56:590
81550,0rcu_preempt3-21ksoftirqd/022:07:000
81550,0rcu_preempt29721-21kworker/0:122:52:110
81540,0rcu_preempt7296-21kworker/0:120:06:110
81540,0rcu_preempt3-21ksoftirqd/023:01:590
81540,0rcu_preempt3-21ksoftirqd/022:36:530
81540,0rcu_preempt3-21ksoftirqd/021:10:270
81540,0rcu_preempt3-21ksoftirqd/020:11:560
81540,0rcu_preempt22010-21kworker/0:221:45:430
81530,0rcu_preempt3-21ksoftirqd/023:37:120
81530,0rcu_preempt3-21ksoftirqd/021:27:010
81530,0rcu_preempt3-21ksoftirqd/000:31:550
81530,0rcu_preempt3-21ksoftirqd/000:27:140
81530,0rcu_preempt3-21ksoftirqd/000:13:260
302522530,0chrt10050irq/346-484840019:36:360
81520,0rcu_preempt6542-21kworker/0:019:02:110
81520,0rcu_preempt3-21ksoftirqd/023:46:140
81520,0rcu_preempt3-21ksoftirqd/022:46:280
81520,0rcu_preempt3-21ksoftirqd/021:56:510
81520,0rcu_preempt3-21ksoftirqd/021:56:510
81520,0rcu_preempt3-21ksoftirqd/020:27:000
81520,0rcu_preempt3-21ksoftirqd/020:22:150
10050520,0irq/346-48484000-21swapper/023:52:490
90942510,0chrt10050irq/346-484840020:09:070
81510,0rcu_preempt3-21ksoftirqd/021:47:040
81510,0rcu_preempt3-21ksoftirqd/021:18:130
81510,0rcu_preempt3-21ksoftirqd/021:12:000
285272510,0chrt10050irq/346-484840019:30:350
81500,0rcu_preempt3-21ksoftirqd/023:27:050
81500,0rcu_preempt3-21ksoftirqd/023:09:000
81500,0rcu_preempt3-21ksoftirqd/022:56:540
81500,0rcu_preempt3-21ksoftirqd/021:36:460
81500,0rcu_preempt3-21ksoftirqd/000:21:530
81500,0rcu_preempt3-21ksoftirqd/000:07:140
81500,0rcu_preempt27273-21kworker/0:123:49:030
81500,0rcu_preempt22227-21apt-get19:11:560
1599500,0migration/03246-21sendmail22:36:420
10050500,0irq/346-484840023717-21ping19:42:480
81490,0rcu_preempt4759-21df_abs23:16:590
81490,0rcu_preempt3-21ksoftirqd/023:15:570
81490,0rcu_preempt3-21ksoftirqd/022:26:570
81490,0rcu_preempt3-21ksoftirqd/022:20:350
81490,0rcu_preempt3-21ksoftirqd/022:15:440
81490,0rcu_preempt3-21ksoftirqd/020:42:030
81490,0rcu_preempt3-21ksoftirqd/019:21:100
4350490,0irq/32-433000003118-21dropbear19:51:580
10050490,0irq/346-48484005784-1kworker/0:0H22:02:110
81480,0rcu_preempt19-21ksoftirqd/121:18:311
81470,0rcu_preempt8341-21ssh21:22:080
81470,0rcu_preempt3-21ksoftirqd/022:47:060
81470,0rcu_preempt3-21ksoftirqd/022:47:060
81470,0rcu_preempt3-21ksoftirqd/022:21:470
81470,0rcu_preempt3-21ksoftirqd/021:52:030
81470,0rcu_preempt3-21ksoftirqd/000:17:060
81470,0rcu_preempt20590-21apt-get19:06:560
81460,0rcu_preempt3-21ksoftirqd/000:02:070
81460,0rcu_preempt25941-21apt-get21:01:560
81460,0rcu_preempt19-21ksoftirqd/120:17:041
81460,0rcu_preempt19-21ksoftirqd/119:58:291
81460,0rcu_preempt17935-21diskstats20:37:000
10050460,0irq/346-48484000-21swapper/021:32:400
81450,0rcu_preempt3-21ksoftirqd/020:52:010
81450,0rcu_preempt3-21ksoftirqd/019:47:120
81450,0rcu_preempt27424-21diskmemload23:09:331
81440,0rcu_preempt8815-21apt-get23:21:560
81440,0rcu_preempt19-21ksoftirqd/120:07:051
81430,0rcu_preempt3-21ksoftirqd/020:46:570
81430,0rcu_preempt19-21ksoftirqd/123:42:001
81430,0rcu_preempt19-21ksoftirqd/122:57:031
81430,0rcu_preempt19-21ksoftirqd/121:02:131
1599430,0migration/017002-21timerwakeupswit20:32:100
81420,0rcu_preempt19-21ksoftirqd/122:32:121
81420,0rcu_preempt19-21ksoftirqd/122:25:081
81420,0rcu_preempt19-21ksoftirqd/122:02:101
81420,0rcu_preempt19-21ksoftirqd/121:47:111
81420,0rcu_preempt19-21ksoftirqd/121:45:091
81420,0rcu_preempt19-21ksoftirqd/119:32:031
81410,0rcu_preempt4261-1kworker/1:2H23:18:281
81410,0rcu_preempt19-21ksoftirqd/123:53:401
81410,0rcu_preempt19-21ksoftirqd/123:24:131
81410,0rcu_preempt19-21ksoftirqd/122:51:581
81410,0rcu_preempt19-21ksoftirqd/122:27:031
81410,0rcu_preempt19-21ksoftirqd/121:58:471
81410,0rcu_preempt19-21ksoftirqd/121:58:471
81410,0rcu_preempt19-21ksoftirqd/121:07:121
81410,0rcu_preempt19-21ksoftirqd/120:23:461
81410,0rcu_preempt19-21ksoftirqd/120:02:401
81410,0rcu_preempt19-21ksoftirqd/119:54:531
81410,0rcu_preempt19-21ksoftirqd/119:42:171
81410,0rcu_preempt19-21ksoftirqd/119:24:431
81410,0rcu_preempt19-21ksoftirqd/100:33:461
81400,0rcu_preempt3-21ksoftirqd/019:22:100
81400,0rcu_preempt27424-21diskmemload00:12:231
81400,0rcu_preempt19-21ksoftirqd/123:47:061
81400,0rcu_preempt19-21ksoftirqd/123:36:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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