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2025-12-28 - 15:13

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 Sun Dec 28, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811490,0rcu_preempt19-21ksoftirqd/110:10:421
811220,0rcu_preempt19-21ksoftirqd/109:22:491
811170,0rcu_preempt19-21ksoftirqd/111:25:281
811160,0rcu_preempt19-21ksoftirqd/111:19:061
811140,0rcu_preempt19-21ksoftirqd/109:00:251
811130,0rcu_preempt19-21ksoftirqd/110:03:351
811130,0rcu_preempt19-21ksoftirqd/109:50:401
811130,0rcu_preempt19-21ksoftirqd/109:35:471
811130,0rcu_preempt19-21ksoftirqd/109:35:471
811120,0rcu_preempt19-21ksoftirqd/112:14:311
811120,0rcu_preempt19-21ksoftirqd/110:59:151
811120,0rcu_preempt19-21ksoftirqd/109:13:351
811110,0rcu_preempt19-21ksoftirqd/111:35:461
811090,0rcu_preempt19-21ksoftirqd/110:35:101
811050,0rcu_preempt19-21ksoftirqd/112:35:121
811030,0rcu_preempt19-21ksoftirqd/109:56:401
811020,0rcu_preempt19-21ksoftirqd/111:32:121
811020,0rcu_preempt19-21ksoftirqd/110:30:241
811010,0rcu_preempt19-21ksoftirqd/112:17:431
811010,0rcu_preempt19-21ksoftirqd/109:46:321
811000,0rcu_preempt19-21ksoftirqd/111:57:141
811000,0rcu_preempt19-21ksoftirqd/111:20:021
811000,0rcu_preempt19-21ksoftirqd/110:17:021
811000,0rcu_preempt19-21ksoftirqd/109:27:571
81980,0rcu_preempt19-21ksoftirqd/109:33:091
81980,0rcu_preempt19-21ksoftirqd/108:30:241
81970,0rcu_preempt19349-1kworker/1:3H12:30:221
81970,0rcu_preempt19-21ksoftirqd/110:21:571
81960,0rcu_preempt19-21ksoftirqd/112:08:301
81960,0rcu_preempt19-21ksoftirqd/110:41:321
81950,0rcu_preempt19-21ksoftirqd/111:07:171
81950,0rcu_preempt19-21ksoftirqd/107:30:331
81940,0rcu_preempt19-21ksoftirqd/110:48:281
81930,0rcu_preempt19-21ksoftirqd/112:21:591
81930,0rcu_preempt19-21ksoftirqd/111:10:251
81930,0rcu_preempt19-21ksoftirqd/110:25:371
81930,0rcu_preempt19-21ksoftirqd/108:20:281
81930,0rcu_preempt19-21ksoftirqd/108:05:081
81920,0rcu_preempt19-21ksoftirqd/107:25:301
81910,0rcu_preempt19-21ksoftirqd/109:16:571
81910,0rcu_preempt19-21ksoftirqd/108:15:291
81900,0rcu_preempt19-21ksoftirqd/112:01:591
81900,0rcu_preempt19-21ksoftirqd/110:09:291
81890,0rcu_preempt19-21ksoftirqd/111:45:031
81890,0rcu_preempt19-21ksoftirqd/111:03:231
81880,0rcu_preempt19-21ksoftirqd/112:26:181
81880,0rcu_preempt19-21ksoftirqd/108:10:061
81870,0rcu_preempt26735-21kworker/1:108:25:001
81870,0rcu_preempt19-21ksoftirqd/107:52:261
81850,0rcu_preempt19-21ksoftirqd/111:44:131
81850,0rcu_preempt19-21ksoftirqd/107:20:591
81840,0rcu_preempt19-21ksoftirqd/108:02:451
81820,0rcu_preempt19-21ksoftirqd/110:51:471
81820,0rcu_preempt19-21ksoftirqd/107:58:581
81820,0rcu_preempt19-21ksoftirqd/107:43:131
243202820,0chrt9950irq/345-484840012:17:470
81810,0rcu_preempt19-21ksoftirqd/107:35:251
81800,0rcu_preempt19-21ksoftirqd/108:58:431
81800,0rcu_preempt19-21ksoftirqd/107:45:111
81790,0rcu_preempt19-21ksoftirqd/111:50:131
303232790,0sleep010050irq/346-484840008:05:290
43662780,0sleep09950irq/345-484840011:55:240
81740,0rcu_preempt19-21ksoftirqd/109:40:121
81740,0rcu_preempt19-21ksoftirqd/107:10:171
10050730,0irq/346-484840022551-1kworker/0:0H10:37:460
81720,0rcu_preempt19-21ksoftirqd/109:05:201
81700,0rcu_preempt19-21ksoftirqd/108:35:061
10050700,0irq/346-48484006768-1kworker/0:3H11:25:350
196082690,0chrt9950irq/345-484840011:36:010
10050690,0irq/346-48484007359-1kworker/0:1H10:24:330
81670,0rcu_preempt19-21ksoftirqd/108:50:071
81650,0rcu_preempt3-21ksoftirqd/012:08:380
10050650,0irq/346-48484000-21swapper/011:22:430
81630,0rcu_preempt54-21kswapd012:12:270
81610,0rcu_preempt3-21ksoftirqd/011:07:190
81610,0rcu_preempt3-21ksoftirqd/009:10:130
81600,0rcu_preempt3-21ksoftirqd/011:19:070
81600,0rcu_preempt3-21ksoftirqd/010:32:540
81590,0rcu_preempt54-21kswapd010:15:110
9950570,0irq/345-48484000-21swapper/007:05:070
10050570,0irq/346-484840024268-21ssh10:29:240
10050560,0irq/346-484840012674-1kworker/0:3H09:55:140
10050560,0irq/346-48484000-21swapper/012:25:200
13052550,0sleep010050irq/346-484840008:15:490
10050550,0irq/346-48484000-21swapper/012:39:490
10050540,0irq/346-484840054-21kswapd007:39:570
10050540,0irq/346-48484002868-21dropbear12:30:120
10050530,0irq/346-48484009663-1kworker/0:1H12:02:250
10050530,0irq/346-484840054-21kswapd010:00:090
10050530,0irq/346-484840025721-1kworker/0:0H11:10:210
81520,0rcu_preempt3-21ksoftirqd/010:05:230
10050520,0irq/346-484840032415-21munin-node0
81510,0rcu_preempt10050-21apt-get08:45:051
10050510,0irq/346-484840054-21kswapd011:03:330
10050510,0irq/346-484840054-21kswapd009:35:290
10050510,0irq/346-484840054-21kswapd009:35:290
10050510,0irq/346-484840027034-21/usr/sbin/munin09:19:560
10050500,0irq/346-484840054-21kswapd010:44:550
10050500,0irq/346-484840023895-1kworker/0:3H09:21:050
10050490,0irq/346-484840054-21kswapd009:53:350
10050480,0irq/346-484840054-21kswapd010:10:170
10050480,0irq/346-484840054-21kswapd009:46:040
10050480,0irq/346-484840054-21kswapd009:40:450
10050480,0irq/346-48484000-21swapper/011:42:290
30892470,0sleep09950irq/345-484840009:29:130
10050470,0irq/346-484840054-21kswapd010:55:540
10050470,0irq/346-484840054-21kswapd010:54:290
10050470,0irq/346-484840024751-1kworker/0:1H11:49:120
10050470,0irq/346-48484000-21swapper/010:46:000
10050460,0irq/346-48484006313-1kworker/0:1H08:35:210
10050460,0irq/346-48484000-21swapper/012:22:290
10050460,0irq/346-48484000-21swapper/009:30:100
1123599442,0cyclictest0-21swapper/007:59:560
1123599441,0cyclictest14504-21ping07:19:550
1123599441,0cyclictest0-21swapper/008:14:510
10050440,0irq/346-48484006768-1kworker/0:3H11:31:300
10050440,0irq/346-484840014162-1kworker/1:3H07:19:561
10050440,0irq/346-48484000-21swapper/008:19:560
81430,0rcu_preempt19-21ksoftirqd/108:40:121
10050430,0irq/346-484840022346-1kworker/0:1H07:50:130
1123599423,0cyclictest0-21swapper/007:26:390
10050420,0irq/346-48484009032-1kworker/0:3H08:50:120
10050420,0irq/346-48484009032-1kworker/0:3H08:42:530
10050420,0irq/346-484840054-21kswapd007:35:360
10050420,0irq/346-48484003050-1kworker/0:3H08:25:230
10050420,0irq/346-484840027515-1kworker/0:2H08:00:010
10050420,0irq/346-48484000-21swapper/007:45:280
10050420,0irq/346-48484000-21swapper/007:20:020
10050410,0irq/346-484840017832-1kworker/0:0H09:09:550
10050410,0irq/346-484840013156-1kworker/0:0H08:55:180
10050410,0irq/346-48484000-21swapper/009:00:020
81400,0rcu_preempt19-21ksoftirqd/107:06:511
10050400,0irq/346-48484003048-1kworker/0:2H08:30:100
10050390,0irq/346-484840010377-1kworker/0:1H07:10:160
10050390,0irq/346-48484000-21swapper/008:45:260
11235993613,0cyclictest0-21swapper/007:30:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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