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2026-07-01 - 15:45

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 Wed Jul 01, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811420,0rcu_preempt3-21ksoftirqd/011:37:520
811380,0rcu_preempt3-21ksoftirqd/011:51:380
811340,0rcu_preempt3-21ksoftirqd/009:25:040
811230,0rcu_preempt3-21ksoftirqd/010:48:320
811070,0rcu_preempt3-21ksoftirqd/010:17:410
811060,0rcu_preempt3-21ksoftirqd/009:20:340
811040,0rcu_preempt3-21ksoftirqd/011:12:410
81990,0rcu_preempt3-21ksoftirqd/011:32:420
81970,0rcu_preempt3-21ksoftirqd/009:41:590
81970,0rcu_preempt3-21ksoftirqd/008:17:150
81970,0rcu_preempt12012-21kworker/0:110:07:440
81950,0rcu_preempt3-21ksoftirqd/012:31:130
81950,0rcu_preempt23124-21kworker/0:010:37:360
81940,0rcu_preempt3-21ksoftirqd/010:32:420
81940,0rcu_preempt19-21ksoftirqd/112:12:181
81930,0rcu_preempt3-21ksoftirqd/010:27:280
81930,0rcu_preempt3-21ksoftirqd/009:27:570
81910,0rcu_preempt3-21ksoftirqd/012:27:150
81890,0rcu_preempt3-21ksoftirqd/011:07:390
81880,0rcu_preempt3-21ksoftirqd/010:02:280
81860,0rcu_preempt3-21ksoftirqd/012:32:320
81820,0rcu_preempt6012-21awk12:07:430
81820,0rcu_preempt3-21ksoftirqd/011:57:390
81810,0rcu_preempt3-21ksoftirqd/010:57:380
81810,0rcu_preempt3-21ksoftirqd/010:57:380
81810,0rcu_preempt3-21ksoftirqd/009:32:280
81810,0rcu_preempt3-21ksoftirqd/007:47:390
81800,0rcu_preempt3-21ksoftirqd/012:17:370
81800,0rcu_preempt3-21ksoftirqd/010:22:460
81800,0rcu_preempt3-21ksoftirqd/008:39:090
81800,0rcu_preempt3-21ksoftirqd/008:07:500
81800,0rcu_preempt3-21ksoftirqd/007:13:550
81790,0rcu_preempt3-21ksoftirqd/011:52:160
81790,0rcu_preempt3-21ksoftirqd/010:52:160
81790,0rcu_preempt3-21ksoftirqd/008:22:500
81780,0rcu_preempt3-21ksoftirqd/011:04:490
81780,0rcu_preempt3-21ksoftirqd/008:20:570
81770,0rcu_preempt54-21kswapd007:52:260
81770,0rcu_preempt3-21ksoftirqd/011:42:410
81770,0rcu_preempt3-21ksoftirqd/010:42:450
81770,0rcu_preempt3-21ksoftirqd/009:02:410
81770,0rcu_preempt3-21ksoftirqd/008:02:590
81770,0rcu_preempt12012-21kworker/0:110:12:390
81760,0rcu_preempt3-21ksoftirqd/011:20:220
81760,0rcu_preempt3-21ksoftirqd/011:20:220
81760,0rcu_preempt3-21ksoftirqd/008:27:460
81760,0rcu_preempt18604-21diskmemload11:32:070
81750,0rcu_preempt3-21ksoftirqd/012:14:170
81750,0rcu_preempt3-21ksoftirqd/011:22:390
81750,0rcu_preempt3-21ksoftirqd/010:00:520
81750,0rcu_preempt3-21ksoftirqd/009:10:050
81750,0rcu_preempt3-21ksoftirqd/008:45:500
81750,0rcu_preempt3-21ksoftirqd/008:33:410
81750,0rcu_preempt3-21ksoftirqd/008:00:040
81740,0rcu_preempt743-21kworker/0:109:48:510
81740,0rcu_preempt3-21ksoftirqd/012:02:290
81740,0rcu_preempt3-21ksoftirqd/009:52:320
81740,0rcu_preempt3-21ksoftirqd/007:42:520
81730,0rcu_preempt3-21ksoftirqd/007:09:440
81720,0rcu_preempt3-21ksoftirqd/009:43:050
81720,0rcu_preempt3-21ksoftirqd/008:53:460
10050710,0irq/346-4848400181ktimersoftd/112:04:051
10050710,0irq/346-4848400181ktimersoftd/109:43:311
81700,0rcu_preempt3-21ksoftirqd/009:15:200
81700,0rcu_preempt3-21ksoftirqd/008:48:320
81670,0rcu_preempt3-21ksoftirqd/008:59:420
81660,0rcu_preempt3-21ksoftirqd/007:22:540
81650,0rcu_preempt20668-21open_inodes07:32:450
9950640,0irq/345-4848400181ktimersoftd/112:36:221
81640,0rcu_preempt3-21ksoftirqd/007:17:320
10050630,0irq/346-484840021279-1kworker/1:2H10:15:381
10050630,0irq/346-4848400181ktimersoftd/110:03:271
10050630,0irq/346-484840012261-1kworker/1:2H12:19:111
9950620,0irq/345-4848400171rcuc/109:17:211
81620,0rcu_preempt19-21ksoftirqd/107:57:461
10050620,0irq/346-484840014243-1kworker/1:1H09:39:221
81610,0rcu_preempt54-21kswapd007:32:160
10050610,0irq/346-484840027312-1kworker/1:0H12:29:221
10050610,0irq/346-484840024091-1kworker/1:2H10:53:301
10050610,0irq/346-4848400181ktimersoftd/110:00:211
10050600,0irq/346-484840054-21kswapd011:01:591
10050600,0irq/346-484840054-21kswapd011:01:591
10050600,0irq/346-484840054-21kswapd010:11:011
10050600,0irq/346-484840029336-1kworker/1:2H09:50:591
10050600,0irq/346-484840018340-1kworker/1:2H09:07:561
10050590,0irq/346-48484008990-1kworker/1:1H10:35:431
10050590,0irq/346-48484004474-1kworker/1:0H11:48:471
10050590,0irq/346-4848400181ktimersoftd/111:35:231
10050590,0irq/346-484840014046-1kworker/1:0H10:40:121
10050580,0irq/346-48484009481-21ssh11:38:561
10050580,0irq/346-484840054-21kswapd011:24:191
10050570,0irq/346-484840026570-1kworker/1:3H09:15:071
10050570,0irq/346-4848400181ktimersoftd/111:05:311
10050570,0irq/346-4848400171rcuc/110:21:231
10050570,0irq/346-484840014243-1kworker/1:1H09:37:041
10050570,0irq/346-48484001167-1kworker/1:3H09:55:151
10050560,0irq/346-484840022321-1kworker/1:1H12:25:481
10050560,0irq/346-4848400181ktimersoftd/111:17:461
10050560,0irq/346-4848400181ktimersoftd/111:17:461
10050560,0irq/346-484840014510-1kworker/1:1H11:45:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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