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2026-08-17 - 21:06

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 Mon Aug 17, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt31155-21ssh12:25:071
811000,0rcu_preempt54-21kswapd009:51:251
81970,0rcu_preempt19-21ksoftirqd/110:11:451
81970,0rcu_preempt0-21swapper/110:50:381
10050970,0irq/346-48484002426-1kworker/0:1H11:26:300
81960,0rcu_preempt19-21ksoftirqd/109:59:581
81960,0rcu_preempt0-21swapper/111:01:311
81950,0rcu_preempt19-21ksoftirqd/110:30:211
81940,0rcu_preempt54-21kswapd009:19:121
81940,0rcu_preempt19-21ksoftirqd/110:55:481
81930,0rcu_preempt54-21kswapd012:39:431
81920,0rcu_preempt19-21ksoftirqd/110:38:001
81900,0rcu_preempt836-21rngd11:05:391
81900,0rcu_preempt19-21ksoftirqd/110:29:421
81880,0rcu_preempt54-21kswapd009:14:171
81880,0rcu_preempt19-21ksoftirqd/109:45:151
81870,0rcu_preempt19-21ksoftirqd/112:03:341
81860,0rcu_preempt19-21ksoftirqd/111:31:391
81850,0rcu_preempt19-21ksoftirqd/109:59:001
81840,0rcu_preempt54-21kswapd011:18:531
81840,0rcu_preempt19-21ksoftirqd/109:32:161
81840,0rcu_preempt19-21ksoftirqd/108:35:011
81830,0rcu_preempt19-21ksoftirqd/111:21:541
81820,0rcu_preempt19-21ksoftirqd/112:33:211
81810,0rcu_preempt19-21ksoftirqd/110:46:231
81770,0rcu_preempt19-21ksoftirqd/111:51:361
81750,0rcu_preempt54-21kswapd009:40:561
81740,0rcu_preempt19-21ksoftirqd/107:24:261
81740,0rcu_preempt10587-21ssh12:04:451
81740,0rcu_preempt0-21swapper/111:36:181
81730,0rcu_preempt19-21ksoftirqd/108:09:521
81720,0rcu_preempt19-21ksoftirqd/111:57:561
81720,0rcu_preempt19-21ksoftirqd/111:11:181
81720,0rcu_preempt19-21ksoftirqd/109:24:381
81710,0rcu_preempt19-21ksoftirqd/110:40:481
81710,0rcu_preempt19-21ksoftirqd/107:58:291
81700,0rcu_preempt54-21kswapd010:15:101
81700,0rcu_preempt54-21kswapd009:37:391
81690,0rcu_preempt19-21ksoftirqd/108:06:361
10050690,0irq/346-484840018827-1kworker/0:4H10:02:180
81680,0rcu_preempt3-21ksoftirqd/009:51:090
81680,0rcu_preempt19-21ksoftirqd/112:10:101
81680,0rcu_preempt19-21ksoftirqd/110:05:181
81670,0rcu_preempt3-21ksoftirqd/009:34:550
81670,0rcu_preempt19-21ksoftirqd/112:15:271
81670,0rcu_preempt19-21ksoftirqd/111:24:491
10050670,0irq/346-4848400171rcuc/109:25:281
81660,0rcu_preempt19-21ksoftirqd/111:47:391
81660,0rcu_preempt19-21ksoftirqd/111:47:391
81660,0rcu_preempt19-21ksoftirqd/108:15:261
81650,0rcu_preempt19-21ksoftirqd/108:39:551
81620,0rcu_preempt3-21ksoftirqd/010:35:050
81620,0rcu_preempt19-21ksoftirqd/111:42:231
81610,0rcu_preempt19-21ksoftirqd/108:49:541
81610,0rcu_preempt19-21ksoftirqd/108:24:311
81610,0rcu_preempt19-21ksoftirqd/108:00:051
81600,0rcu_preempt23071-1kworker/1:2H12:20:021
81600,0rcu_preempt19-21ksoftirqd/110:22:121
81600,0rcu_preempt19-21ksoftirqd/109:00:051
81600,0rcu_preempt19-21ksoftirqd/107:09:541
81590,0rcu_preempt3-21ksoftirqd/011:20:070
81590,0rcu_preempt19-21ksoftirqd/108:28:281
81590,0rcu_preempt19-21ksoftirqd/107:50:031
81590,0rcu_preempt19-21ksoftirqd/107:15:001
81590,0rcu_preempt19-21ksoftirqd/107:15:001
81550,0rcu_preempt3-21ksoftirqd/012:33:050
10050540,0irq/346-48484008233-21ssh12:35:000
81520,0rcu_preempt19-21ksoftirqd/108:55:041
81520,0rcu_preempt19-21ksoftirqd/108:30:061
81510,0rcu_preempt30159-21df_abs09:04:561
81510,0rcu_preempt27770-21ping07:35:441
81510,0rcu_preempt19-21ksoftirqd/108:45:041
10050510,0irq/346-484840011439-1kworker/0:2H09:25:190
81500,0rcu_preempt3-21ksoftirqd/012:22:540
81500,0rcu_preempt31144-1kworker/0:2H09:16:040
10050500,0irq/346-4848400836-21rngd11:18:380
81490,0rcu_preempt3-21ksoftirqd/007:20:030
10050490,0irq/346-484840027770-21ping07:44:551
10050490,0irq/346-484840023818-21munin-node0
81480,0rcu_preempt3-21ksoftirqd/011:43:010
10050480,0irq/346-484840023802-1kworker/0:0H10:11:020
81470,0rcu_preempt3-21ksoftirqd/011:44:550
81470,0rcu_preempt3-21ksoftirqd/011:44:550
81470,0rcu_preempt19-21ksoftirqd/107:40:461
81470,0rcu_preempt19-21ksoftirqd/107:30:101
10050470,0irq/346-484840011439-1kworker/0:2H09:21:250
10050470,0irq/346-484840011369-21munin-node0
9950460,0irq/345-484840023802-1kworker/0:0H10:07:230
9950460,0irq/345-484840016426-1kworker/0:1H09:39:520
81460,0rcu_preempt19-21ksoftirqd/107:26:001
81460,0rcu_preempt19-21ksoftirqd/107:26:001
10050460,0irq/346-484840010164-1kworker/0:0H11:33:480
9950450,0irq/345-48484005356-21seq07:49:550
81450,0rcu_preempt3-21ksoftirqd/011:06:280
81450,0rcu_preempt3-21ksoftirqd/008:20:130
81450,0rcu_preempt3-21ksoftirqd/008:00:130
2448799452,0cyclictest1683750munin-node0
81440,0rcu_preempt32615-21kworker/0:209:45:120
81440,0rcu_preempt3-21ksoftirqd/008:59:540
81440,0rcu_preempt3-21ksoftirqd/008:54:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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