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2026-04-11 - 05:59

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 highest latencies:
System rackaslot5s.osadl.org (updated Sat Apr 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811630,0rcu_preempt3-21ksoftirqd/000:00:070
811400,0rcu_preempt3-21ksoftirqd/021:48:480
811400,0rcu_preempt3-21ksoftirqd/021:16:170
811360,0rcu_preempt3-21ksoftirqd/023:36:470
811070,0rcu_preempt3-21ksoftirqd/022:17:140
811050,0rcu_preempt3-21ksoftirqd/022:40:520
811050,0rcu_preempt3-21ksoftirqd/022:40:520
811020,0rcu_preempt3-21ksoftirqd/023:45:230
811020,0rcu_preempt3-21ksoftirqd/023:45:230
81890,0rcu_preempt3-21ksoftirqd/022:48:390
81850,0rcu_preempt3-21ksoftirqd/022:09:000
81840,0rcu_preempt54-21kswapd022:38:070
81840,0rcu_preempt3-21ksoftirqd/023:03:450
81840,0rcu_preempt3-21ksoftirqd/022:26:440
81840,0rcu_preempt3-21ksoftirqd/020:13:450
81820,0rcu_preempt3-21ksoftirqd/023:27:440
81820,0rcu_preempt19991-21kworker/0:200:09:220
81820,0rcu_preempt14182-21taskset19:56:500
81800,0rcu_preempt3-21ksoftirqd/023:53:520
81800,0rcu_preempt3-21ksoftirqd/022:53:440
81800,0rcu_preempt3-21ksoftirqd/000:35:160
81800,0rcu_preempt1470-21runrttasks19:58:580
81790,0rcu_preempt3-21ksoftirqd/022:01:440
81790,0rcu_preempt3-21ksoftirqd/021:39:320
81790,0rcu_preempt3-21ksoftirqd/000:17:320
81790,0rcu_preempt23371-21ntpq20:23:590
81790,0rcu_preempt1470-21runrttasks20:11:060
81780,0rcu_preempt3-21ksoftirqd/022:07:490
81780,0rcu_preempt3-21ksoftirqd/021:23:550
81780,0rcu_preempt3-21ksoftirqd/020:52:460
81780,0rcu_preempt3-21ksoftirqd/019:10:530
81780,0rcu_preempt3-21ksoftirqd/000:22:280
81770,0rcu_preempt7267-21kworker/0:123:30:330
81770,0rcu_preempt3-21ksoftirqd/023:53:280
81770,0rcu_preempt3-21ksoftirqd/023:12:340
81770,0rcu_preempt3-21ksoftirqd/023:12:340
81770,0rcu_preempt3-21ksoftirqd/022:59:490
81770,0rcu_preempt3-21ksoftirqd/021:58:330
81770,0rcu_preempt3-21ksoftirqd/020:29:030
81770,0rcu_preempt3-21ksoftirqd/000:32:560
81760,0rcu_preempt54-21kswapd021:44:090
81750,0rcu_preempt3-21ksoftirqd/023:18:300
81750,0rcu_preempt3-21ksoftirqd/021:23:100
81750,0rcu_preempt3-21ksoftirqd/021:10:270
81750,0rcu_preempt3-21ksoftirqd/019:51:160
81750,0rcu_preempt19760-21ssh22:28:500
81740,0rcu_preempt3-21ksoftirqd/023:20:570
81740,0rcu_preempt3-21ksoftirqd/022:23:190
81740,0rcu_preempt3-21ksoftirqd/021:32:000
81740,0rcu_preempt3-21ksoftirqd/021:02:350
81740,0rcu_preempt3-21ksoftirqd/020:03:560
81740,0rcu_preempt3-21ksoftirqd/000:04:040
81730,0rcu_preempt54-21kswapd020:18:590
81730,0rcu_preempt3-21ksoftirqd/023:42:060
81730,0rcu_preempt3-21ksoftirqd/020:43:570
81730,0rcu_preempt3-21ksoftirqd/020:43:570
81730,0rcu_preempt3-21ksoftirqd/000:27:470
81720,0rcu_preempt3-21ksoftirqd/020:54:410
81720,0rcu_preempt3-21ksoftirqd/019:48:140
81710,0rcu_preempt3-21ksoftirqd/021:06:420
81700,0rcu_preempt3-21ksoftirqd/020:41:170
81700,0rcu_preempt3-21ksoftirqd/020:33:530
81700,0rcu_preempt3-21ksoftirqd/019:13:480
81690,0rcu_preempt3-21ksoftirqd/021:38:200
81690,0rcu_preempt3-21ksoftirqd/019:38:340
81680,0rcu_preempt3-21ksoftirqd/022:45:310
81680,0rcu_preempt3-21ksoftirqd/019:32:590
81670,0rcu_preempt3-21ksoftirqd/019:23:460
81670,0rcu_preempt3-21ksoftirqd/019:23:350
81630,0rcu_preempt3-21ksoftirqd/019:43:340
81630,0rcu_preempt3-21ksoftirqd/019:43:340
10050630,0irq/346-4848400171rcuc/122:16:291
10050620,0irq/346-4848400181ktimersoftd/122:34:481
10050620,0irq/346-4848400171rcuc/122:05:161
9950610,0irq/345-4848400181ktimersoftd/123:50:281
9950610,0irq/345-4848400171rcuc/122:32:281
10050610,0irq/346-4848400181ktimersoftd/100:05:171
10050590,0irq/346-484840054-21kswapd000:30:331
10050580,0irq/346-484840054-21kswapd021:53:021
10050580,0irq/346-4848400181ktimersoftd/122:11:061
10050580,0irq/346-4848400181ktimersoftd/121:55:441
10050580,0irq/346-4848400171rcuc/121:42:391
10050580,0irq/346-484840012222-1kworker/1:2H21:16:561
10050570,0irq/346-484840054-21kswapd021:23:111
10050550,0irq/346-48484002969-1kworker/1:1H21:09:441
10050550,0irq/346-4848400171rcuc/122:24:131
10050550,0irq/346-48484001531-1kworker/1:2H23:15:411
10050540,0irq/346-484840031261-1kworker/1:1H23:46:001
10050540,0irq/346-484840031261-1kworker/1:1H23:46:001
10050540,0irq/346-484840030358-21cyclictest21:37:241
10050540,0irq/346-4848400181ktimersoftd/123:30:501
10050540,0irq/346-4848400181ktimersoftd/122:38:511
10050540,0irq/346-4848400181ktimersoftd/122:38:511
10050540,0irq/346-4848400181ktimersoftd/100:21:531
10050540,0irq/346-4848400181ktimersoftd/100:01:071
10050540,0irq/346-4848400171rcuc/123:01:101
3036099532,0cyclictest4172-21ssh23:18:451
10050530,0irq/346-484840054-21kswapd023:36:351
10050530,0irq/346-484840054-21kswapd022:02:511
10050520,0irq/346-484840054-21kswapd023:54:191
10050510,0irq/346-484840054-21kswapd021:26:151
10050510,0irq/346-484840029603-21ssh21:33:301
10050510,0irq/346-484840025499-21ssh23:39:291
3036099502,0cyclictest26343-21df00:13:481
81490,0rcu_preempt20052-21kworker/0:319:03:580
10050490,0irq/346-484840023383-21ssh23:04:341
10050490,0irq/346-4848400181ktimersoftd/100:35:561
3036099481,0cyclictest4941-21diskmemload00:08:441
3036099481,0cyclictest29289-21apt-get20:43:451
3036099481,0cyclictest29289-21apt-get20:43:451
9950470,0irq/345-484840054-21kswapd020:28:341
3036099472,0cyclictest6688-21latency_hist22:48:351
3036099472,0cyclictest29652-21runrttasks23:11:201
3036099472,0cyclictest29652-21runrttasks23:11:201
3036099471,0cyclictest3623-21munin-node1
10050470,0irq/346-484840054-21kswapd022:52:201
10050470,0irq/346-484840011206-21ssh21:47:261
3036099462,0cyclictest12245-21if_err_eth022:53:511
3036099461,0cyclictest4941-21diskmemload23:26:031
3036099455,0cyclictest617-21kernelversion20:53:541
3036099453,0cyclictest32142-21apt-get19:13:471
3036099452,0cyclictest9611-21ssh22:18:451
3036099442,0cyclictest30503-21apt-get19:08:451
3036099442,0cyclictest20965-21latency_hist20:18:341
3036099434,0cyclictest16568-21runrttasks20:03:541
3036099432,0cyclictest30928-21apt-get20:48:451
3036099432,0cyclictest17900-21aten_rapower_vo20:08:471
3036099432,0cyclictest14987-21munin-node1
3036099432,0cyclictest1470-21runrttasks20:18:461
3036099422,0cyclictest4945-21munin-run21:08:341
3036099422,0cyclictest2520-21runrttasks19:19:471
3036099422,0cyclictest24322-21latency_hist20:28:351
3036099422,0cyclictest1219-21ping19:43:481
3036099422,0cyclictest1219-21ping19:23:551
3036099421,0cyclictest1817-21apt-get20:58:451
3036099418,0cyclictest11213-21taskset19:48:381
3036099412,0cyclictest4661-21munin-node1
3036099412,0cyclictest27913-21php-cgi20:38:521
3036099411,0cyclictest25994-21apt-get20:33:441
3036099411,0cyclictest1219-21ping19:34:011
81400,0rcu_preempt19-21ksoftirqd/119:03:471
3036099402,0cyclictest12864-21apt-get19:53:441
3036099402,0cyclictest1219-21ping19:39:041
3036099402,0cyclictest1219-21ping19:39:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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