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2026-06-03 - 20:53

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 Wed Jun 03, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81860,0rcu_preempt3-21ksoftirqd/010:58:120
81790,0rcu_preempt9950irq/345-484840012:27:161
81790,0rcu_preempt9950irq/345-484840012:27:161
81750,0rcu_preempt3-21ksoftirqd/011:33:010
81740,0rcu_preempt3-21ksoftirqd/008:37:560
81730,0rcu_preempt3-21ksoftirqd/009:42:520
81610,0rcu_preempt23506-21ping08:07:440
151782610,0chrt10050irq/346-484840007:29:080
81590,0rcu_preempt30252-21diskstats12:08:000
185622590,0chrt10050irq/346-484840007:40:090
13250580,0irq/301-480200054-21kswapd012:32:560
81570,0rcu_preempt3-21ksoftirqd/009:18:090
10050570,0irq/346-484840016026-21cut10:47:540
10050570,0irq/346-484840016026-21cut10:47:540
9950560,0irq/345-4848400851-21rngd08:08:110
81560,0rcu_preempt3-21ksoftirqd/012:23:100
81560,0rcu_preempt3-21ksoftirqd/012:23:100
81560,0rcu_preempt3-21ksoftirqd/011:12:330
81560,0rcu_preempt14141-21ssh10:12:590
81550,0rcu_preempt3-21ksoftirqd/007:13:100
9950540,0irq/345-4848400851-21rngd12:05:360
81540,0rcu_preempt3-21ksoftirqd/011:43:120
81540,0rcu_preempt3-21ksoftirqd/010:42:550
81540,0rcu_preempt3-21ksoftirqd/009:38:040
81540,0rcu_preempt3-21ksoftirqd/009:12:560
81530,0rcu_preempt3-21ksoftirqd/012:17:430
81530,0rcu_preempt3-21ksoftirqd/011:03:100
81530,0rcu_preempt3-21ksoftirqd/010:56:520
81530,0rcu_preempt3-21ksoftirqd/010:32:540
4350530,0irq/32-4330000054-21kswapd009:27:560
81520,0rcu_preempt3-21ksoftirqd/012:28:040
81520,0rcu_preempt3-21ksoftirqd/011:23:060
81520,0rcu_preempt3-21ksoftirqd/010:08:080
81510,0rcu_preempt3-21ksoftirqd/012:14:430
81510,0rcu_preempt3-21ksoftirqd/011:17:430
81510,0rcu_preempt3-21ksoftirqd/009:32:550
81510,0rcu_preempt3-21ksoftirqd/009:22:430
10050510,0irq/346-484840021345-1kworker/0:1H10:22:460
81500,0rcu_preempt3-21ksoftirqd/011:48:550
81500,0rcu_preempt3-21ksoftirqd/010:29:000
81500,0rcu_preempt3-21ksoftirqd/008:18:060
81500,0rcu_preempt19-21ksoftirqd/111:08:051
81500,0rcu_preempt19-21ksoftirqd/109:48:091
119612500,0chrt10050irq/346-484840007:19:420
10050500,0irq/346-48484000-21swapper/012:01:080
81490,0rcu_preempt9950irq/345-484840007:17:551
81490,0rcu_preempt3-21ksoftirqd/011:38:060
81490,0rcu_preempt3-21ksoftirqd/011:38:060
81490,0rcu_preempt3-21ksoftirqd/010:37:540
81490,0rcu_preempt3-21ksoftirqd/010:20:140
81490,0rcu_preempt3-21ksoftirqd/009:59:370
81490,0rcu_preempt3-21ksoftirqd/008:33:050
81490,0rcu_preempt3-21ksoftirqd/007:03:010
135082490,0chrt10050irq/346-484840007:23:460
10050490,0irq/346-48484000-21swapper/009:48:020
81480,0rcu_preempt3-21ksoftirqd/010:07:430
81480,0rcu_preempt3-21ksoftirqd/009:03:020
81480,0rcu_preempt3-21ksoftirqd/008:28:030
81480,0rcu_preempt29221-21kworker/0:208:16:560
10050480,0irq/346-48484008117-21munin-node0
81470,0rcu_preempt54-21kswapd009:38:091
81470,0rcu_preempt3-21ksoftirqd/011:54:440
81470,0rcu_preempt3-21ksoftirqd/008:48:040
81470,0rcu_preempt3-21ksoftirqd/007:58:070
81470,0rcu_preempt3-21ksoftirqd/007:47:590
10050470,0irq/346-484840027615-21munin-run11:32:430
10050470,0irq/346-48484000-21swapper/009:52:440
10050460,0irq/346-48484007087-21threads08:43:090
81450,0rcu_preempt3-21ksoftirqd/007:52:430
10050450,0irq/346-484840014575-21munin-node0
81440,0rcu_preempt3-21ksoftirqd/011:16:000
81440,0rcu_preempt3-21ksoftirqd/008:59:460
81440,0rcu_preempt3-21ksoftirqd/008:52:560
81440,0rcu_preempt3-21ksoftirqd/008:23:000
81430,0rcu_preempt19-21ksoftirqd/111:22:571
81430,0rcu_preempt19-21ksoftirqd/107:58:421
10050430,0irq/346-484840016170-21irqstats07:33:090
81410,0rcu_preempt3-21ksoftirqd/007:43:100
81410,0rcu_preempt19-21ksoftirqd/110:58:131
81410,0rcu_preempt19-21ksoftirqd/110:16:201
81400,0rcu_preempt19-21ksoftirqd/112:12:021
81400,0rcu_preempt19-21ksoftirqd/111:13:591
81400,0rcu_preempt19-21ksoftirqd/110:55:521
81400,0rcu_preempt19-21ksoftirqd/109:43:081
81400,0rcu_preempt19-21ksoftirqd/108:16:121
81400,0rcu_preempt19-21ksoftirqd/107:05:441
81390,0rcu_preempt19-21ksoftirqd/111:53:031
81390,0rcu_preempt19-21ksoftirqd/110:38:081
81390,0rcu_preempt19-21ksoftirqd/108:33:091
81390,0rcu_preempt19-21ksoftirqd/108:04:211
81390,0rcu_preempt19-21ksoftirqd/107:44:361
81380,0rcu_preempt7319-21cyclictest09:18:061
81380,0rcu_preempt19-21ksoftirqd/112:12:461
81380,0rcu_preempt19-21ksoftirqd/111:57:481
81380,0rcu_preempt19-21ksoftirqd/111:52:321
81380,0rcu_preempt19-21ksoftirqd/110:44:291
81380,0rcu_preempt19-21ksoftirqd/110:25:351
81380,0rcu_preempt19-21ksoftirqd/109:36:361
81380,0rcu_preempt19-21ksoftirqd/109:23:181
81380,0rcu_preempt19-21ksoftirqd/109:15:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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