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2026-04-11 - 18:31

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 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt19-21ksoftirqd/108:09:001
811300,0rcu_preempt19-21ksoftirqd/111:04:221
811210,0rcu_preempt23368-1kworker/1:0H10:54:001
811130,0rcu_preempt19-21ksoftirqd/112:37:061
811110,0rcu_preempt19-21ksoftirqd/108:06:251
81980,0rcu_preempt19-21ksoftirqd/110:23:571
81900,0rcu_preempt19-21ksoftirqd/111:29:011
81830,0rcu_preempt16397-21kworker/0:111:54:570
81750,0rcu_preempt14584-21apt-get07:13:450
81740,0rcu_preempt19-21ksoftirqd/111:08:491
81710,0rcu_preempt19-21ksoftirqd/112:04:001
81700,0rcu_preempt3-21ksoftirqd/009:13:510
81690,0rcu_preempt19-21ksoftirqd/107:29:011
81670,0rcu_preempt19-21ksoftirqd/110:05:311
81670,0rcu_preempt19-21ksoftirqd/109:43:341
81650,0rcu_preempt28978-21ping08:08:450
81650,0rcu_preempt19-21ksoftirqd/111:39:271
81640,0rcu_preempt3-21ksoftirqd/008:04:040
81640,0rcu_preempt18551-21ssh12:24:000
81630,0rcu_preempt54-21kswapd009:43:430
81630,0rcu_preempt19-21ksoftirqd/112:00:091
81620,0rcu_preempt3-21ksoftirqd/009:31:360
81620,0rcu_preempt3-21ksoftirqd/009:31:360
12798996216,0cyclictest19430-21ssh10:13:480
81610,0rcu_preempt3-21ksoftirqd/011:24:000
81610,0rcu_preempt19-21ksoftirqd/111:44:031
81610,0rcu_preempt19-21ksoftirqd/109:43:171
81610,0rcu_preempt19-21ksoftirqd/109:17:341
81610,0rcu_preempt19-21ksoftirqd/107:08:341
81610,0rcu_preempt16472-21kworker/0:007:48:580
12798996119,0cyclictest7447-21ssh12:13:330
12798996116,0cyclictest244832sleep009:13:140
12798996115,0cyclictest0-21swapper/011:29:570
81600,0rcu_preempt19-21ksoftirqd/111:50:541
81600,0rcu_preempt19-21ksoftirqd/111:33:441
12798996019,0cyclictest6195-21munin-run10:33:340
12798996015,0cyclictest0-21swapper/010:19:130
81590,0rcu_preempt3-21ksoftirqd/009:38:530
12798995919,0cyclictest27717-1kworker/0:0H12:03:510
12798995915,0cyclictest0-21swapper/010:37:010
12798995914,0cyclictest0-21swapper/009:58:100
81580,0rcu_preempt23334-21ntp_states12:28:580
12798995814,0cyclictest0-21swapper/011:21:540
12798995813,0cyclictest0-21swapper/009:59:100
81570,0rcu_preempt3-21ksoftirqd/010:39:400
81570,0rcu_preempt3-21ksoftirqd/008:24:340
12798995721,0cyclictest15633-21munin-node0
12798995713,0cyclictest0-21swapper/010:27:340
12798995713,0cyclictest0-21swapper/010:08:390
10050570,0irq/346-4848400110962sleep012:16:520
81560,0rcu_preempt6325-21kworker/0:009:34:030
12798995623,0cyclictest2410-21apt-get09:23:450
12798995615,0cyclictest0-21swapper/010:56:210
12798995614,0cyclictest0-21swapper/010:53:080
81550,0rcu_preempt3-21ksoftirqd/011:33:500
81550,0rcu_preempt3-21ksoftirqd/011:01:540
81550,0rcu_preempt19-21ksoftirqd/110:36:161
81550,0rcu_preempt19-21ksoftirqd/110:18:581
12798995522,0cyclictest9713-21taskset10:03:510
12798995522,0cyclictest3566-21apt-get11:03:460
12798995519,0cyclictest30179-21df09:18:500
12798995519,0cyclictest30179-21df09:18:500
81540,0rcu_preempt28978-21ping07:58:540
81540,0rcu_preempt19-21ksoftirqd/111:23:231
81540,0rcu_preempt19-21ksoftirqd/110:58:551
81540,0rcu_preempt19-21ksoftirqd/109:19:521
81540,0rcu_preempt19-21ksoftirqd/109:19:521
12798995423,0cyclictest12887-1kworker/0:0H08:49:030
12798995422,0cyclictest27845-21ntpq09:48:590
12798995422,0cyclictest0-21swapper/012:20:320
12798995412,0cyclictest0-21swapper/011:17:180
12798995412,0cyclictest0-21swapper/011:17:180
81530,0rcu_preempt3-21ksoftirqd/008:20:000
81530,0rcu_preempt28978-21ping08:13:450
12798995320,0cyclictest12578-21seq11:45:020
12798995319,0cyclictest31446-21chrt12:37:420
12798995317,0cyclictest16754-21taskset07:18:590
12798995314,0cyclictest0-21swapper/007:33:480
9950520,0irq/345-4848400851-21rngd11:08:480
81520,0rcu_preempt3-21ksoftirqd/010:43:580
81520,0rcu_preempt19-21ksoftirqd/112:28:571
81520,0rcu_preempt19-21ksoftirqd/111:57:551
81520,0rcu_preempt19-21ksoftirqd/110:08:571
12798995222,0cyclictest29927-21ssh12:03:250
81510,0rcu_preempt10099-21apt-get08:38:450
12798995120,0cyclictest12504-1kworker/0:0H07:08:510
12798995118,0cyclictest0-21swapper/008:28:470
81500,0rcu_preempt3-21ksoftirqd/011:38:520
81500,0rcu_preempt3-21ksoftirqd/007:53:530
12799995023,0cyclictest19800-21diskmemload10:52:061
81490,0rcu_preempt16083-21ping07:23:460
81480,0rcu_preempt3-21ksoftirqd/009:03:340
12799994831,0cyclictest1873-21apt-get08:13:471
12798994818,0cyclictest16083-21ping07:30:250
12798994817,0cyclictest0-21swapper/008:34:030
81470,0rcu_preempt28903-21kworker/u4:007:53:381
81470,0rcu_preempt16083-21ping07:33:561
81470,0rcu_preempt15229-21diskstats08:53:490
12799994732,0cyclictest0-21swapper/108:33:471
12799994731,0cyclictest12267-21sh09:33:461
12799994730,0cyclictest19800-21diskmemload12:23:341
12799994730,0cyclictest0-21swapper/108:28:471
12799994727,0cyclictest19800-21diskmemload09:58:311
12799994724,0cyclictest16263-21ssh10:43:461
12798994726,0cyclictest16083-21ping07:39:050
12799994632,0cyclictest1470-21runrttasks09:58:581
12799994631,0cyclictest7721-21munin-node1
12799994631,0cyclictest2427-21ssh09:23:461
12799994631,0cyclictest19800-21diskmemload10:38:551
12799994630,0cyclictest19800-21diskmemload09:30:401
12799994630,0cyclictest19800-21diskmemload09:30:401
12799994629,0cyclictest19236-21apt-get10:13:451
12799994623,0cyclictest15230-21munin-node1
12798994618,0cyclictest0-21swapper/007:44:000
12799994531,0cyclictest24318-21sed11:24:011
12799994531,0cyclictest13478-21ssh12:18:591
12799994530,0cyclictest4054-21munin-node1
12799994530,0cyclictest10667-21munin-node1
12799994529,0cyclictest19800-21diskmemload09:51:591
12799994529,0cyclictest19800-21diskmemload09:10:351
12798994516,0cyclictest0-21swapper/008:43:580
81440,0rcu_preempt19-21ksoftirqd/111:13:501
81440,0rcu_preempt19-21ksoftirqd/111:13:501
81440,0rcu_preempt19-21ksoftirqd/107:48:531
12799994430,0cyclictest23602-21munin-node1
12799994430,0cyclictest16684-21munin-node1
12799994429,0cyclictest3159-21ssh10:29:281
12799994429,0cyclictest0-21swapper/108:18:481
12799994422,0cyclictest29548-21munin-node1
12798994412,0cyclictest0-21swapper/009:03:490
1599430,0migration/011678-21if_err_eth307:03:510
12799994329,0cyclictest0-21swapper/108:43:481
81420,0rcu_preempt19-21ksoftirqd/107:19:031
12799994229,0cyclictest17887-21munin-node1
12799994228,0cyclictest6336-21taskset08:25:151
12799994228,0cyclictest0-21swapper/107:08:521
12799994227,0cyclictest18527-21entropy09:03:511
12799994227,0cyclictest0-21swapper/107:13:461
12799994128,0cyclictest54-21kswapd008:48:471
12799994126,0cyclictest25120-21munin-node1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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