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2026-06-04 - 16:56

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 Jun 04, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050880,0irq/346-4848400111rcuc/012:07:550
9950800,0irq/345-484840041ktimersoftd/009:40:590
10050740,0irq/346-484840041ktimersoftd/010:21:150
10050710,0irq/346-484840041ktimersoftd/011:29:590
10050710,0irq/346-484840041ktimersoftd/011:29:590
10050700,0irq/346-48484008436-1kworker/0:1H11:52:060
10050700,0irq/346-484840041ktimersoftd/010:34:050
10050700,0irq/346-484840021454-1kworker/0:2H10:27:130
81680,0rcu_preempt5655-1kworker/1:2H12:23:071
244199672,0cyclictest0-21swapper/011:14:470
81660,0rcu_preempt19-21ksoftirqd/110:41:451
81660,0rcu_preempt19-21ksoftirqd/107:50:151
81640,0rcu_preempt19-21ksoftirqd/110:19:321
81630,0rcu_preempt19-21ksoftirqd/110:29:411
81630,0rcu_preempt19-21ksoftirqd/108:03:041
81620,0rcu_preempt19-21ksoftirqd/110:22:571
10050620,0irq/346-484840041ktimersoftd/010:14:460
10050610,0irq/346-484840054-21kswapd009:35:211
10050600,0irq/346-484840054-21kswapd010:10:441
10050600,0irq/346-484840054-21kswapd009:12:101
81590,0rcu_preempt54-21kswapd010:02:080
81590,0rcu_preempt19-21ksoftirqd/112:04:501
81590,0rcu_preempt19-21ksoftirqd/109:19:401
10050590,0irq/346-484840054-21kswapd011:59:471
10050590,0irq/346-484840054-21kswapd011:28:581
10050590,0irq/346-484840054-21kswapd011:28:581
10050590,0irq/346-484840025960-1kworker/1:2H11:37:401
81580,0rcu_preempt19-21ksoftirqd/110:16:241
81580,0rcu_preempt19-21ksoftirqd/109:46:241
81580,0rcu_preempt19-21ksoftirqd/109:30:341
81580,0rcu_preempt14649-21apt-get09:12:510
244199581,0cyclictest0-21swapper/009:33:350
2441995711,0cyclictest0-21swapper/007:37:430
10050570,0irq/346-48484004900-1kworker/0:2H12:20:110
81560,0rcu_preempt19-21ksoftirqd/112:14:261
81550,0rcu_preempt20695-21kworker/0:109:56:550
81550,0rcu_preempt19-21ksoftirqd/112:21:411
10050550,0irq/346-484840054-21kswapd012:24:160
10050550,0irq/346-484840054-21kswapd009:54:061
10050550,0irq/346-484840014323-1kworker/1:3H09:52:311
81540,0rcu_preempt3-21ksoftirqd/010:37:560
81540,0rcu_preempt3-21ksoftirqd/008:23:080
10050540,0irq/346-484840054-21kswapd012:29:481
10050540,0irq/346-484840054-21kswapd010:52:511
81530,0rcu_preempt3-21ksoftirqd/011:23:080
81530,0rcu_preempt3-21ksoftirqd/010:52:570
81530,0rcu_preempt3-21ksoftirqd/009:17:510
10050530,0irq/346-484840054-21kswapd011:20:551
10050530,0irq/346-484840054-21kswapd011:04:211
10050530,0irq/346-484840054-21kswapd010:06:431
81520,0rcu_preempt19-21ksoftirqd/111:23:121
81520,0rcu_preempt19-21ksoftirqd/107:28:191
81520,0rcu_preempt19-21ksoftirqd/107:28:191
10050520,0irq/346-484840054-21kswapd012:35:371
10050520,0irq/346-484840054-21kswapd012:01:530
10050520,0irq/346-484840054-21kswapd011:01:491
10050520,0irq/346-484840054-21kswapd010:01:121
81510,0rcu_preempt851-21rngd09:23:010
81510,0rcu_preempt3-21ksoftirqd/011:37:590
81510,0rcu_preempt3-21ksoftirqd/010:05:570
10050510,0irq/346-48484008524-21ssh09:38:331
10050510,0irq/346-4848400851-21rngd12:27:540
10050510,0irq/346-4848400851-21rngd10:29:360
10050510,0irq/346-484840054-21kswapd011:52:071
10050510,0irq/346-484840054-21kswapd011:08:381
10050510,0irq/346-484840054-21kswapd010:52:221
81500,0rcu_preempt3-21ksoftirqd/012:15:380
81500,0rcu_preempt3-21ksoftirqd/011:52:580
81500,0rcu_preempt3-21ksoftirqd/008:01:010
81500,0rcu_preempt3-21ksoftirqd/008:01:010
81500,0rcu_preempt19-21ksoftirqd/111:47:411
81500,0rcu_preempt18498-21ping08:10:080
10050500,0irq/346-484840054-21kswapd012:32:580
10050500,0irq/346-484840054-21kswapd011:37:260
10050500,0irq/346-484840054-21kswapd009:24:431
81490,0rcu_preempt9431-21diskmemload10:43:240
81490,0rcu_preempt3910-1kworker/1:1H10:42:521
81490,0rcu_preempt3-21ksoftirqd/009:47:530
81490,0rcu_preempt3-21ksoftirqd/009:03:040
81490,0rcu_preempt3-21ksoftirqd/008:15:380
81490,0rcu_preempt19-21ksoftirqd/108:22:591
81490,0rcu_preempt19-21ksoftirqd/108:16:221
81490,0rcu_preempt19-21ksoftirqd/107:34:181
81490,0rcu_preempt19-21ksoftirqd/107:34:181
81490,0rcu_preempt12042-21kworker/0:010:11:270
10050490,0irq/346-484840054-21kswapd012:03:210
10050490,0irq/346-484840054-21kswapd011:21:400
10050490,0irq/346-484840054-21kswapd009:45:330
10050490,0irq/346-484840017007-1kworker/1:0H09:16:401
10050490,0irq/346-48484000-21swapper/011:01:230
81480,0rcu_preempt8718-21kworker/0:111:07:180
81480,0rcu_preempt3-21ksoftirqd/009:10:560
81480,0rcu_preempt3-21ksoftirqd/008:47:570
81480,0rcu_preempt3-21ksoftirqd/008:19:100
81480,0rcu_preempt3-21ksoftirqd/007:54:460
81480,0rcu_preempt30330-21kworker/1:207:42:531
81480,0rcu_preempt28197-21kworker/0:007:15:000
81480,0rcu_preempt20347-21kworker/0:208:03:110
81480,0rcu_preempt19-21ksoftirqd/108:38:081
81480,0rcu_preempt18498-21ping07:57:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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