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2026-05-06 - 15:06

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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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 792 highest latencies:
System rackaslot5s.osadl.org (updated Wed May 06, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811390,0rcu_preempt19-21ksoftirqd/110:43:391
811390,0rcu_preempt19-21ksoftirqd/110:43:391
811350,0rcu_preempt19-21ksoftirqd/111:12:111
811330,0rcu_preempt19-21ksoftirqd/110:48:271
811280,0rcu_preempt19-21ksoftirqd/108:13:311
811160,0rcu_preempt54-21kswapd011:55:071
811140,0rcu_preempt19-21ksoftirqd/110:29:501
811120,0rcu_preempt19-21ksoftirqd/109:13:341
811110,0rcu_preempt19-21ksoftirqd/112:07:031
811100,0rcu_preempt19-21ksoftirqd/111:03:301
811090,0rcu_preempt19-21ksoftirqd/112:31:241
811090,0rcu_preempt19-21ksoftirqd/110:25:531
811080,0rcu_preempt19-21ksoftirqd/111:17:461
811080,0rcu_preempt19-21ksoftirqd/110:37:491
811060,0rcu_preempt19-21ksoftirqd/110:40:251
811050,0rcu_preempt19-21ksoftirqd/109:43:401
811020,0rcu_preempt19-21ksoftirqd/111:20:081
81990,0rcu_preempt54-21kswapd011:34:451
81990,0rcu_preempt19-21ksoftirqd/112:18:261
81980,0rcu_preempt19-21ksoftirqd/111:43:561
81970,0rcu_preempt851-21rngd08:28:331
81970,0rcu_preempt19-21ksoftirqd/110:10:091
81970,0rcu_preempt19-21ksoftirqd/109:30:371
81970,0rcu_preempt19-21ksoftirqd/107:33:511
81950,0rcu_preempt19-21ksoftirqd/107:45:421
81940,0rcu_preempt19-21ksoftirqd/112:09:541
81930,0rcu_preempt19-21ksoftirqd/112:37:561
81920,0rcu_preempt19-21ksoftirqd/110:59:001
81920,0rcu_preempt19-21ksoftirqd/110:57:131
81920,0rcu_preempt19-21ksoftirqd/110:57:131
81920,0rcu_preempt19-21ksoftirqd/110:07:381
81920,0rcu_preempt19-21ksoftirqd/109:24:121
81910,0rcu_preempt19-21ksoftirqd/111:23:381
81900,0rcu_preempt19-21ksoftirqd/112:00:351
81900,0rcu_preempt19-21ksoftirqd/110:00:391
81870,0rcu_preempt28549-1kworker/1:2H11:29:051
81850,0rcu_preempt19-21ksoftirqd/107:58:221
81830,0rcu_preempt19-21ksoftirqd/107:38:231
81820,0rcu_preempt19-21ksoftirqd/109:35:471
81810,0rcu_preempt19-21ksoftirqd/108:08:251
81810,0rcu_preempt19-21ksoftirqd/107:23:351
81800,0rcu_preempt19-21ksoftirqd/107:20:521
81790,0rcu_preempt19-21ksoftirqd/109:54:081
81790,0rcu_preempt19-21ksoftirqd/108:03:341
81790,0rcu_preempt19-21ksoftirqd/107:28:441
81780,0rcu_preempt19-21ksoftirqd/108:24:381
81770,0rcu_preempt23597-21kworker/1:109:50:421
81760,0rcu_preempt19-21ksoftirqd/109:42:001
81760,0rcu_preempt19-21ksoftirqd/109:08:211
81750,0rcu_preempt19-21ksoftirqd/112:17:241
81750,0rcu_preempt19-21ksoftirqd/111:52:441
81750,0rcu_preempt19-21ksoftirqd/111:42:021
81750,0rcu_preempt19-21ksoftirqd/110:20:171
81750,0rcu_preempt19-21ksoftirqd/109:02:111
81750,0rcu_preempt19-21ksoftirqd/108:20:561
81750,0rcu_preempt19-21ksoftirqd/107:13:231
81740,0rcu_preempt19-21ksoftirqd/110:18:101
81730,0rcu_preempt19-21ksoftirqd/112:26:261
81720,0rcu_preempt19-21ksoftirqd/107:58:101
81700,0rcu_preempt19-21ksoftirqd/109:23:101
10050680,0irq/346-484840041ktimersoftd/010:49:060
81660,0rcu_preempt3-21ksoftirqd/011:05:550
828899656,0cyclictest10050-1kworker/0:0H09:35:120
828899651,0cyclictest9147-21apt-get11:13:210
828899648,0cyclictest0-21swapper/010:38:380
828899641,0cyclictest8788-21seq11:45:190
828899641,0cyclictest54-21kswapd012:13:100
828899632,0cyclictest0-21swapper/009:28:100
828899626,0cyclictest16161-21192.168.115.60-07:29:450
828899622,0cyclictest30448-21ntpq10:28:350
828899622,0cyclictest0-21swapper/009:09:400
828899614,0cyclictest0-21swapper/012:33:340
828899612,0cyclictest0-21swapper/012:18:090
8288996111,0cyclictest8631-21runrttasks10:06:530
8288996012,0cyclictest25440-21seq09:50:520
828899601,0cyclictest6944-1kworker/0:0H12:25:240
828899601,0cyclictest32409-21apt-get09:58:210
828899601,0cyclictest0-21swapper/010:13:300
828899601,0cyclictest0-21swapper/009:43:350
828899592,0cyclictest27259-21seq10:25:230
828899592,0cyclictest10359-21munin-node0
828899592,0cyclictest0-21swapper/011:37:250
828899591,0cyclictest19381-21if_err_eth011:23:290
828899587,0cyclictest29605-21awk08:13:100
828899586,0cyclictest29821-1kworker/0:3H09:58:090
828899586,0cyclictest0-21swapper/011:09:580
828899582,0cyclictest26963-21ssh11:31:050
828899582,0cyclictest24985-21ssh09:18:010
828899582,0cyclictest16635-21munin-node0
81580,0rcu_preempt19-21ksoftirqd/108:43:101
828899579,0cyclictest3-21ksoftirqd/010:54:010
828899579,0cyclictest3-21ksoftirqd/010:54:010
828899573,0cyclictest0-21swapper/010:44:460
828899573,0cyclictest0-21swapper/010:44:460
828899573,0cyclictest0-21swapper/010:20:430
828899572,0cyclictest0-21swapper/012:03:050
8288995712,0cyclictest2406-21dropbear10:33:260
828899571,0cyclictest27130-21http_loadtime10:58:280
828899571,0cyclictest11933-21ssh12:21:350
8288995710,0cyclictest13827-21ssh09:38:370
8288995710,0cyclictest11216-21ssh11:48:210
10050570,0irq/346-484840054-21kswapd011:56:470
828899562,0cyclictest20207-21munin-node0
828899562,0cyclictest0-21swapper/011:41:300
8288995613,0cyclictest26304-21ssh09:18:350
8288995611,0cyclictest26141-21aten_rapower_po12:03:220
828899561,0cyclictest14362-21munin-node0
828899561,0cyclictest11567-21ping07:23:210
828899557,0cyclictest11969-21awk08:58:090
828899552,0cyclictest31247-21munin-run08:18:090
828899552,0cyclictest25811-21unixbench_multi07:58:390
828899551,0cyclictest18416-21ssh12:28:220
828899542,0cyclictest0-21swapper/008:38:540
8288995414,0cyclictest2267-21munin-node0
828899541,0cyclictest8835-21munin-node0
828899541,0cyclictest0-21swapper/009:03:100
81540,0rcu_preempt3-21ksoftirqd/007:03:240
828899532,0cyclictest19504-21runrttasks07:40:250
8288995312,0cyclictest2977-21aten_rapower_vo09:28:220
828899523,0cyclictest0-21swapper/008:46:400
828899522,0cyclictest2118-21ls08:28:100
828899521,0cyclictest10050irq/346-484840008:19:030
828899521,0cyclictest0-21swapper/007:13:310
8288995210,0cyclictest0-21swapper/008:36:550
81520,0rcu_preempt19-21ksoftirqd/108:53:221
828899519,0cyclictest0-21swapper/009:03:300
828899512,0cyclictest0-21swapper/008:03:400
81500,0rcu_preempt19-21ksoftirqd/107:48:341
828899492,0cyclictest13219-21munin-run07:23:100
828899481,0cyclictest17795-1kworker/0:2H07:48:270
828899481,0cyclictest14853-21rs:main0
8288994810,0cyclictest0-21swapper/007:08:320
81480,0rcu_preempt19-21ksoftirqd/107:08:261
81440,0rcu_preempt23597-21kworker/1:109:03:311
81420,0rcu_preempt0-21swapper/108:33:291
81410,0rcu_preempt19-21ksoftirqd/107:07:201
81400,0rcu_preempt19-21ksoftirqd/108:48:341
81390,0rcu_preempt19-21ksoftirqd/108:38:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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