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2026-09-08 - 17:38

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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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 Sep 08, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811270,0rcu_preempt16806-21kworker/1:109:45:131
811250,0rcu_preempt19-21ksoftirqd/109:58:421
811240,0rcu_preempt19-21ksoftirqd/110:11:291
811190,0rcu_preempt19-21ksoftirqd/112:17:581
811190,0rcu_preempt19-21ksoftirqd/112:06:041
811190,0rcu_preempt0-21swapper/112:28:311
811180,0rcu_preempt19-21ksoftirqd/111:53:541
811170,0rcu_preempt19-21ksoftirqd/110:06:001
811170,0rcu_preempt19-21ksoftirqd/109:41:201
811160,0rcu_preempt836-21rngd10:36:391
811160,0rcu_preempt19-21ksoftirqd/112:04:081
811160,0rcu_preempt19-21ksoftirqd/110:33:401
811120,0rcu_preempt19-21ksoftirqd/109:12:231
811110,0rcu_preempt19-21ksoftirqd/111:20:061
811090,0rcu_preempt9706-21apt-get11:24:321
811090,0rcu_preempt9706-21apt-get11:24:321
811080,0rcu_preempt19-21ksoftirqd/110:44:351
811080,0rcu_preempt19-21ksoftirqd/109:30:591
811060,0rcu_preempt19-21ksoftirqd/111:37:061
811060,0rcu_preempt19-21ksoftirqd/109:20:031
811040,0rcu_preempt54-21kswapd009:52:431
811040,0rcu_preempt19-21ksoftirqd/112:24:121
811040,0rcu_preempt19-21ksoftirqd/111:56:521
811030,0rcu_preempt19-21ksoftirqd/109:34:461
811020,0rcu_preempt19-21ksoftirqd/111:14:591
811010,0rcu_preempt19-21ksoftirqd/110:41:051
81990,0rcu_preempt836-21rngd10:00:321
81990,0rcu_preempt19-21ksoftirqd/111:07:011
81990,0rcu_preempt13029-21ssh10:22:371
81990,0rcu_preempt0-21swapper/112:13:381
81980,0rcu_preempt19-21ksoftirqd/111:45:131
81980,0rcu_preempt19-21ksoftirqd/111:45:131
81970,0rcu_preempt19-21ksoftirqd/109:18:061
81970,0rcu_preempt19-21ksoftirqd/108:34:431
81960,0rcu_preempt54-21kswapd012:35:181
81940,0rcu_preempt19-21ksoftirqd/110:50:321
81930,0rcu_preempt19-21ksoftirqd/111:40:411
81920,0rcu_preempt19-21ksoftirqd/110:24:281
81910,0rcu_preempt19-21ksoftirqd/111:13:291
81910,0rcu_preempt19-21ksoftirqd/111:01:151
81910,0rcu_preempt19-21ksoftirqd/110:17:371
81900,0rcu_preempt19-21ksoftirqd/111:29:581
81880,0rcu_preempt19-21ksoftirqd/112:33:541
81880,0rcu_preempt19-21ksoftirqd/109:25:501
81860,0rcu_preempt19-21ksoftirqd/108:27:261
81840,0rcu_preempt19-21ksoftirqd/110:54:251
81840,0rcu_preempt19-21ksoftirqd/108:29:341
81840,0rcu_preempt19-21ksoftirqd/108:10:541
81840,0rcu_preempt19-21ksoftirqd/108:10:541
81830,0rcu_preempt19-21ksoftirqd/108:23:231
81830,0rcu_preempt19-21ksoftirqd/108:23:231
81820,0rcu_preempt1445-21runrttasks07:48:041
81810,0rcu_preempt19-21ksoftirqd/107:40:341
81800,0rcu_preempt19-21ksoftirqd/107:24:231
81790,0rcu_preempt19-21ksoftirqd/108:07:151
81790,0rcu_preempt19-21ksoftirqd/107:15:171
81780,0rcu_preempt19-21ksoftirqd/109:04:451
81780,0rcu_preempt19-21ksoftirqd/108:14:351
81770,0rcu_preempt19-21ksoftirqd/107:38:211
81760,0rcu_preempt19-21ksoftirqd/107:29:441
81750,0rcu_preempt19-21ksoftirqd/107:09:391
81740,0rcu_preempt19-21ksoftirqd/108:01:301
81730,0rcu_preempt19-21ksoftirqd/107:22:351
81730,0rcu_preempt0-21swapper/108:39:451
10050730,0irq/346-484840054-21kswapd010:44:380
81720,0rcu_preempt0-21swapper/108:44:401
81710,0rcu_preempt3-21ksoftirqd/009:51:220
10050700,0irq/346-484840054-21kswapd011:13:080
10050700,0irq/346-48484003928-1kworker/0:1H09:19:190
10050700,0irq/346-484840019550-1kworker/0:1H09:59:070
10050690,0irq/346-48484004162-1kworker/0:2H11:50:550
10050690,0irq/346-484840011790-1kworker/0:2H12:33:510
81680,0rcu_preempt3-21ksoftirqd/009:21:080
81680,0rcu_preempt19-21ksoftirqd/108:55:441
81680,0rcu_preempt19-21ksoftirqd/108:55:441
81680,0rcu_preempt19-21ksoftirqd/107:49:411
81680,0rcu_preempt19-21ksoftirqd/107:49:411
81680,0rcu_preempt0-21swapper/107:58:331
81670,0rcu_preempt19-21ksoftirqd/109:03:021
10050670,0irq/346-484840054-21kswapd010:05:460
10050660,0irq/346-48484009509-1kworker/0:1H09:47:390
81640,0rcu_preempt19-21ksoftirqd/108:49:451
10050630,0irq/346-484840022170-1kworker/0:1H10:31:300
10050610,0irq/346-484840012145-1kworker/0:3H12:09:320
81580,0rcu_preempt3-21ksoftirqd/012:04:420
10050560,0irq/346-484840054-21kswapd012:24:390
29647995410,0cyclictest476-21ping07:39:230
10050530,0irq/346-484840014522-1kworker/0:2H10:00:530
10050520,0irq/346-484840010589-21ssh10:52:340
5150510,0irq/332-48070000-21swapper/010:24:540
10050510,0irq/346-484840054-21kswapd011:04:080
10050500,0irq/346-484840054-21kswapd011:22:390
10050490,0irq/346-484840028140-21munin-node0
81480,0rcu_preempt3-21ksoftirqd/009:34:520
10050480,0irq/346-484840031577-1kworker/0:0H11:48:270
10050480,0irq/346-484840031577-1kworker/0:0H11:48:270
10050480,0irq/346-484840029523-1kworker/0:2H10:12:170
10050480,0irq/346-484840017320-1kworker/0:1H11:33:340
10050480,0irq/346-484840016014-21munin-node0
13250470,0irq/301-480200054-21kswapd008:39:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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