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2026-05-07 - 12:59

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 Thu May 07, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811160,0rcu_preempt3-21ksoftirqd/021:16:360
81900,0rcu_preempt3-21ksoftirqd/023:07:450
81880,0rcu_preempt3253-21ssh21:28:290
81860,0rcu_preempt3-21ksoftirqd/022:58:100
81840,0rcu_preempt3-21ksoftirqd/023:31:170
81820,0rcu_preempt3-21ksoftirqd/021:08:210
81800,0rcu_preempt3-21ksoftirqd/023:15:380
81790,0rcu_preempt3-21ksoftirqd/021:03:210
81770,0rcu_preempt3-21ksoftirqd/022:32:350
81750,0rcu_preempt3-21ksoftirqd/023:57:100
81750,0rcu_preempt3-21ksoftirqd/023:57:100
81750,0rcu_preempt30145-21apt-get21:23:200
9950740,0irq/345-4848400181ktimersoftd/121:23:231
10050740,0irq/346-4848400171rcuc/123:23:311
81720,0rcu_preempt3-21ksoftirqd/000:02:200
81710,0rcu_preempt3-21ksoftirqd/023:12:270
10050710,0irq/346-484840017474-1kworker/0:2H00:19:250
81700,0rcu_preempt3-21ksoftirqd/020:08:090
81700,0rcu_preempt3-21ksoftirqd/000:05:290
81700,0rcu_preempt3-21ksoftirqd/000:05:290
10050700,0irq/346-484840027045-1kworker/0:3H22:27:570
10050690,0irq/346-484840017474-1kworker/0:2H00:17:220
10050680,0irq/346-48484004936-1kworker/0:0H21:35:550
81670,0rcu_preempt3-21ksoftirqd/021:57:430
81650,0rcu_preempt3-21ksoftirqd/021:39:390
81640,0rcu_preempt1611-21apt-get23:38:200
10050620,0irq/346-484840019-21ksoftirqd/122:43:451
10050620,0irq/346-48484000-21swapper/022:11:260
9950610,0irq/345-4848400171rcuc/123:48:251
81610,0rcu_preempt3-21ksoftirqd/022:18:190
10050610,0irq/346-4848400171rcuc/122:03:111
10050610,0irq/346-4848400171rcuc/100:33:311
10050610,0irq/346-4848400171rcuc/100:01:151
9950600,0irq/345-4848400171rcuc/122:55:451
9950600,0irq/345-4848400171rcuc/100:18:321
81600,0rcu_preempt3-21ksoftirqd/022:51:360
81600,0rcu_preempt3-21ksoftirqd/020:36:570
81600,0rcu_preempt3-21ksoftirqd/000:10:530
10050600,0irq/346-48484000-21swapper/022:16:270
10050600,0irq/346-48484000-21swapper/021:52:030
81590,0rcu_preempt54-21kswapd021:46:590
81590,0rcu_preempt54-21kswapd020:19:400
81590,0rcu_preempt3-21ksoftirqd/023:48:280
10050590,0irq/346-4848400851-21rngd21:30:261
10050590,0irq/346-48484003099-21sed20:28:390
10050590,0irq/346-4848400181ktimersoftd/122:30:531
10050590,0irq/346-4848400171rcuc/122:19:351
9950580,0irq/345-4848400181ktimersoftd/123:29:001
9950580,0irq/345-4848400181ktimersoftd/100:24:071
9950580,0irq/345-4848400171rcuc/100:06:481
9950580,0irq/345-4848400171rcuc/100:06:481
81580,0rcu_preempt3-21ksoftirqd/023:24:060
81580,0rcu_preempt17911-1kworker/0:0H19:44:420
10050580,0irq/346-484840019-21ksoftirqd/120:29:491
10050580,0irq/346-4848400181ktimersoftd/121:33:461
10050580,0irq/346-4848400171rcuc/100:15:041
9950570,0irq/345-4848400181ktimersoftd/123:16:541
9950570,0irq/345-4848400181ktimersoftd/122:40:111
9950570,0irq/345-4848400181ktimersoftd/122:40:111
10050570,0irq/346-4848400181ktimersoftd/123:34:031
10050570,0irq/346-4848400171rcuc/123:23:061
10050570,0irq/346-4848400171rcuc/122:25:261
10050570,0irq/346-48484000-21swapper/023:19:100
9950560,0irq/345-4848400181ktimersoftd/100:08:131
81560,0rcu_preempt3-21ksoftirqd/021:19:270
81560,0rcu_preempt19-21ksoftirqd/121:12:351
10050560,0irq/346-4848400181ktimersoftd/122:51:451
10050560,0irq/346-4848400171rcuc/121:56:281
9950550,0irq/345-4848400181ktimersoftd/122:11:281
9950550,0irq/345-4848400171rcuc/122:36:521
10050550,0irq/346-4848400181ktimersoftd/123:56:371
10050550,0irq/346-4848400181ktimersoftd/123:56:371
10050550,0irq/346-4848400171rcuc/121:46:281
10050550,0irq/346-48484001411-1kworker/0:0H00:23:320
9950540,0irq/345-4848400171rcuc/121:16:121
81540,0rcu_preempt7090-21kworker/0:020:53:360
10050540,0irq/346-484840028859-21unixbench_multi20:08:380
10050540,0irq/346-4848400171rcuc/100:28:131
10050540,0irq/346-4848400171rcuc/100:28:131
9950530,0irq/345-4848400808199cyclictest23:05:041
9950530,0irq/345-4848400171rcuc/123:00:571
10050530,0irq/346-4848400808199cyclictest22:17:541
10050530,0irq/346-484840024467-21sh19:58:090
10050530,0irq/346-484840018713-1kworker/0:1H00:29:320
10050530,0irq/346-484840018713-1kworker/0:1H00:29:320
10050530,0irq/346-4848400181ktimersoftd/122:02:271
10050520,0irq/346-48484004646-1kworker/0:0H22:04:190
10050520,0irq/346-484840018713-1kworker/0:1H00:33:350
8081995111,0cyclictest377-21runrttasks20:23:211
10050510,0irq/346-4848400739-21munin-node0
10050510,0irq/346-48484006726-1kworker/0:2H22:46:080
10050510,0irq/346-484840029760-1kworker/0:1H21:59:150
9950500,0irq/345-484840029630-21munin-node0
81500,0rcu_preempt0-21swapper/120:14:471
10050500,0irq/346-48484005840-21munin-node0
10050500,0irq/346-484840018870-21munin-node0
10050490,0irq/346-48484005821-21ssh22:36:480
9950480,0irq/345-484840012703-21awk20:58:350
9950480,0irq/345-484840012703-21awk20:58:350
9950480,0irq/345-48484000-21swapper/019:28:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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