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2026-04-08 - 16:54

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 Apr 08, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt3-21ksoftirqd/011:33:490
81780,0rcu_preempt54-21kswapd010:29:291
81750,0rcu_preempt3-21ksoftirqd/011:03:570
81740,0rcu_preempt3-21ksoftirqd/008:39:030
81700,0rcu_preempt19697-21diskmemload10:13:550
81690,0rcu_preempt19-21ksoftirqd/110:23:551
81680,0rcu_preempt3-21ksoftirqd/012:13:520
81660,0rcu_preempt3-21ksoftirqd/008:48:540
81660,0rcu_preempt3-21ksoftirqd/008:34:020
81630,0rcu_preempt3-21ksoftirqd/007:39:010
81620,0rcu_preempt19-21ksoftirqd/111:08:561
175742610,0chrt10050irq/346-484840007:23:070
10050610,0irq/346-48484004746-1kworker/0:2H09:38:390
81600,0rcu_preempt3-21ksoftirqd/011:53:470
81600,0rcu_preempt28873-21ping08:23:370
81590,0rcu_preempt3-21ksoftirqd/010:48:590
10050590,0irq/346-48484000-21swapper/009:36:520
81580,0rcu_preempt19-21ksoftirqd/109:54:021
10050580,0irq/346-484840054-21kswapd011:43:370
81570,0rcu_preempt3-21ksoftirqd/008:58:540
81570,0rcu_preempt12688-21cyclictest08:24:050
81560,0rcu_preempt19-21ksoftirqd/110:03:531
81560,0rcu_preempt18839-21if_err_eth012:23:550
10050560,0irq/346-484840054-21kswapd012:34:080
10050560,0irq/346-484840021842-1kworker/0:0H10:22:180
81550,0rcu_preempt3-21ksoftirqd/008:28:490
10050550,0irq/346-484840019205-1kworker/0:0H10:47:440
10050550,0irq/346-48484001475-1kworker/0:0H10:28:540
10050550,0irq/346-484840010176-21munin-node0
10050550,0irq/346-48484000-21swapper/009:29:480
10050540,0irq/346-484840054-21kswapd011:25:530
10050540,0irq/346-484840054-21kswapd011:20:170
10050530,0irq/346-484840054-21kswapd009:56:370
10050530,0irq/346-484840030709-1kworker/0:0H11:40:000
81520,0rcu_preempt3-21ksoftirqd/011:58:460
81520,0rcu_preempt3-21ksoftirqd/009:58:540
81520,0rcu_preempt3-21ksoftirqd/007:14:030
10050520,0irq/346-484840020094-21cut09:08:490
10050520,0irq/346-484840020094-21cut09:08:490
9950510,0irq/345-4848400851-21rngd09:53:370
9950510,0irq/345-48484000-21swapper/012:04:280
10050510,0irq/346-484840024980-21munin-node0
10050510,0irq/346-484840014985-21irqstats10:08:580
81500,0rcu_preempt3-21ksoftirqd/010:24:040
10050500,0irq/346-484840013912-21chrt10:08:200
10050500,0irq/346-48484000-21swapper/012:30:560
81490,0rcu_preempt3-21ksoftirqd/010:40:560
81490,0rcu_preempt19-21ksoftirqd/108:08:381
10050490,0irq/346-484840054-21kswapd011:00:040
10050490,0irq/346-48484000-21swapper/010:57:570
81480,0rcu_preempt3-21ksoftirqd/011:32:560
224132480,0chrt10050irq/346-484840007:37:230
1268999481,0cyclictest28873-21ping07:58:480
10050480,0irq/346-484840014642-21ssh11:13:590
10050480,0irq/346-48484000-21swapper/012:19:550
10050480,0irq/346-48484000-21swapper/012:10:250
10050480,0irq/346-48484000-21swapper/012:10:250
81470,0rcu_preempt3-21ksoftirqd/009:43:540
206722470,0chrt10050irq/346-484840007:31:160
10050470,0irq/346-484840027606-21munin-node0
10050470,0irq/346-48484001299-1kworker/0:0H08:10:270
10050470,0irq/346-484840011812-21df08:43:500
81460,0rcu_preempt3-21ksoftirqd/008:13:490
10050460,0irq/346-48484002300-21munin-node0
10050460,0irq/346-484840019699-21latency_hist09:08:360
10050460,0irq/346-484840011401-21ssh10:38:370
10050460,0irq/346-48484000-21swapper/009:19:400
81450,0rcu_preempt19-21ksoftirqd/111:53:471
9950440,0irq/345-48484000-21swapper/011:52:360
81440,0rcu_preempt3-21ksoftirqd/007:03:530
1268999446,0cyclictest0-21swapper/008:03:530
81420,0rcu_preempt54-21kswapd010:40:171
9950410,0irq/345-48484000-21swapper/007:48:520
81410,0rcu_preempt19-21ksoftirqd/109:58:491
9950400,0irq/345-48484003-21ksoftirqd/007:45:230
81400,0rcu_preempt19-21ksoftirqd/112:08:381
81400,0rcu_preempt19-21ksoftirqd/112:08:381
81400,0rcu_preempt19-21ksoftirqd/111:39:031
81400,0rcu_preempt19-21ksoftirqd/111:24:011
9950390,0irq/345-484840015976-21ping07:25:200
81390,0rcu_preempt19-21ksoftirqd/110:38:361
81390,0rcu_preempt19-21ksoftirqd/107:03:561
1699380,0migration/112845-21sh12:18:121
130882380,0chrt12347-1kworker/0:0H07:08:530
10050380,0irq/346-484840027335-1kworker/1:3H09:16:281
81370,0rcu_preempt3-21ksoftirqd/008:55:040
81370,0rcu_preempt19-21ksoftirqd/110:58:501
81370,0rcu_preempt19-21ksoftirqd/110:56:331
81370,0rcu_preempt19-21ksoftirqd/110:48:551
81370,0rcu_preempt19-21ksoftirqd/110:18:321
81370,0rcu_preempt19-21ksoftirqd/109:31:161
81370,0rcu_preempt19-21ksoftirqd/109:25:111
10050370,0irq/346-48484004745-1kworker/1:1H09:33:581
10050370,0irq/346-484840029499-1kworker/1:1H09:51:161
81360,0rcu_preempt19-21ksoftirqd/111:49:471
81360,0rcu_preempt19-21ksoftirqd/111:28:561
1699360,0migration/111678-21aten_rapower_en08:43:481
10050360,0irq/346-48484001703-1kworker/1:2H11:05:211
9950350,0irq/345-48484000-21swapper/109:18:531
81350,0rcu_preempt19-21ksoftirqd/111:33:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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