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2026-07-01 - 01:43

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Tue Jun 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811110,0rcu_preempt0-21swapper/008:42:380
811090,0rcu_preempt3-21ksoftirqd/010:53:390
811090,0rcu_preempt21307-1kworker/0:1H07:27:520
811070,0rcu_preempt3-21ksoftirqd/007:12:340
811030,0rcu_preempt1470-21runrttasks10:47:450
811010,0rcu_preempt3-21ksoftirqd/012:01:450
811000,0rcu_preempt3-21ksoftirqd/011:12:420
811000,0rcu_preempt3-21ksoftirqd/008:02:400
81990,0rcu_preempt3-21ksoftirqd/010:37:410
81970,0rcu_preempt3-21ksoftirqd/010:15:440
81950,0rcu_preempt3-21ksoftirqd/010:26:510
81940,0rcu_preempt3-21ksoftirqd/010:33:300
81920,0rcu_preempt3-21ksoftirqd/011:27:410
81880,0rcu_preempt32249-21kworker/0:109:54:020
81750,0rcu_preempt3-21ksoftirqd/009:44:140
81710,0rcu_preempt3-21ksoftirqd/008:07:250
81690,0rcu_preempt23384-21apt-get11:22:280
81680,0rcu_preempt18576-21ssh11:17:281
10050680,0irq/346-484840054-21kswapd012:02:251
10050680,0irq/346-484840019162-1kworker/1:1H10:50:021
15011996523,0cyclictest1994-1kworker/0:0H11:34:140
81640,0rcu_preempt3-21ksoftirqd/008:12:280
10050640,0irq/346-484840015934-1kworker/1:2H11:35:491
81630,0rcu_preempt23304-21kworker/0:112:32:170
15011996316,0cyclictest918050ssh09:27:160
81610,0rcu_preempt3-21ksoftirqd/008:22:440
10050610,0irq/346-484840014096-1kworker/1:2H12:22:511
81600,0rcu_preempt3-21ksoftirqd/012:17:330
81600,0rcu_preempt3-21ksoftirqd/010:42:290
81600,0rcu_preempt3-21ksoftirqd/007:57:450
15011996024,0cyclictest29184-1kworker/0:2H09:17:120
10050600,0irq/346-484840054-21kswapd009:43:431
10050600,0irq/346-48484004664-1kworker/1:0H10:31:221
10050600,0irq/346-484840012890-1kworker/1:3H10:07:461
10050590,0irq/346-484840054-21kswapd012:09:041
10050590,0irq/346-484840012890-1kworker/1:3H10:06:211
81580,0rcu_preempt3-21ksoftirqd/012:12:380
81580,0rcu_preempt3-21ksoftirqd/012:07:430
81580,0rcu_preempt3-21ksoftirqd/011:47:080
81580,0rcu_preempt3-21ksoftirqd/011:04:060
81580,0rcu_preempt3-21ksoftirqd/011:04:060
81580,0rcu_preempt3-21ksoftirqd/008:49:420
81580,0rcu_preempt3-21ksoftirqd/007:47:390
81580,0rcu_preempt29247-21kworker/0:110:27:320
15011995817,0cyclictest25965-1kworker/0:3H09:48:430
15011995814,0cyclictest0-21swapper/012:04:080
10050580,0irq/346-48484009445-1kworker/1:3H10:40:161
81570,0rcu_preempt3-21ksoftirqd/012:32:270
81570,0rcu_preempt3-21ksoftirqd/009:32:360
81570,0rcu_preempt3-21ksoftirqd/009:19:150
81570,0rcu_preempt0-21swapper/008:41:150
15011995716,0cyclictest24268-1kworker/0:1H09:10:020
10050570,0irq/346-48484003203-1kworker/1:2H09:56:361
10050570,0irq/346-484840022585-1kworker/1:0H10:16:011
81560,0rcu_preempt3-21ksoftirqd/010:17:350
81560,0rcu_preempt3-21ksoftirqd/007:52:390
81560,0rcu_preempt19265-21ssh11:17:400
81560,0rcu_preempt19227-21kworker/0:010:11:520
10050560,0irq/346-484840022585-1kworker/1:0H10:23:181
81550,0rcu_preempt3-21ksoftirqd/011:37:280
81550,0rcu_preempt3-21ksoftirqd/009:57:360
81550,0rcu_preempt3-21ksoftirqd/008:52:420
15011995520,0cyclictest23032-21ssh09:41:270
10050550,0irq/346-48484006575-1kworker/1:2H09:36:281
10050550,0irq/346-484840054-21kswapd008:20:570
10050550,0irq/346-48484002895-1kworker/1:0H11:47:281
10050550,0irq/346-484840014096-1kworker/1:2H12:21:411
10050550,0irq/346-484840011062-1kworker/1:3H11:09:501
10050550,0irq/346-48484000-21swapper/109:24:591
81540,0rcu_preempt3-21ksoftirqd/009:01:340
15011995421,0cyclictest1336-1kworker/0:2H11:00:130
15011995419,0cyclictest18296-21ping07:17:270
10050540,0irq/346-48484008054-1kworker/1:1H09:59:471
10050540,0irq/346-484840054-21kswapd011:51:260
10050540,0irq/346-484840054-21kswapd011:41:381
10050540,0irq/346-484840054-21kswapd010:02:490
81530,0rcu_preempt3-21ksoftirqd/008:27:410
81530,0rcu_preempt23514-21users09:07:451
15011995320,0cyclictest23633-21munin-node0
10050530,0irq/346-48484006575-1kworker/1:2H09:28:121
10050530,0irq/346-484840025613-1kworker/1:0H11:27:581
10050530,0irq/346-484840025613-1kworker/1:0H11:24:201
81520,0rcu_preempt3-21ksoftirqd/009:02:450
10050520,0irq/346-484840015934-1kworker/1:2H11:15:471
81510,0rcu_preempt3-21ksoftirqd/011:52:400
81510,0rcu_preempt3-21ksoftirqd/011:07:420
81510,0rcu_preempt3-21ksoftirqd/009:30:010
10050510,0irq/346-48484009060-21ssh12:14:001
10050510,0irq/346-48484006216-1kworker/1:0H11:06:201
10050510,0irq/346-48484006216-1kworker/1:0H11:06:201
10050510,0irq/346-484840030789-1kworker/1:1H09:51:531
10050510,0irq/346-484840029495-1kworker/1:3H07:54:231
10050510,0irq/346-484840024012-1kworker/1:2H10:53:171
10050510,0irq/346-484840018945-1kworker/1:1H12:27:461
10050510,0irq/346-48484001339-21snmpd12:00:371
10050510,0irq/346-48484000-21swapper/112:33:041
15011995015,0cyclictest18296-21ping07:22:430
10050500,0irq/346-484840054-21kswapd009:12:221
10050500,0irq/346-48484001470-21runrttasks11:56:011
10050500,0irq/346-48484000-21swapper/012:22:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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