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2025-12-20 - 15:28

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 Sat Dec 20, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811290,0rcu_preempt3-21ksoftirqd/009:56:250
811290,0rcu_preempt3-21ksoftirqd/009:56:250
811280,0rcu_preempt8621-21diskmemload12:04:130
811280,0rcu_preempt757-21rngd11:28:000
811280,0rcu_preempt3-21ksoftirqd/008:10:260
811270,0rcu_preempt8621-21diskmemload09:17:550
811270,0rcu_preempt8621-21diskmemload09:17:550
811250,0rcu_preempt8621-21diskmemload10:25:030
811250,0rcu_preempt3-21ksoftirqd/012:17:080
811230,0rcu_preempt3-21ksoftirqd/011:57:050
811210,0rcu_preempt8621-21diskmemload10:41:060
811150,0rcu_preempt3-21ksoftirqd/010:20:350
811100,0rcu_preempt3-21ksoftirqd/012:35:040
81960,0rcu_preempt3-21ksoftirqd/009:23:370
81960,0rcu_preempt19-21ksoftirqd/111:53:131
81940,0rcu_preempt0-21swapper/109:10:491
81930,0rcu_preempt16750-1kworker/1:1H10:00:031
81910,0rcu_preempt16163-21ssh11:35:281
81880,0rcu_preempt19-21ksoftirqd/109:35:211
81840,0rcu_preempt19-21ksoftirqd/109:56:201
81840,0rcu_preempt19-21ksoftirqd/109:56:201
81760,0rcu_preempt757-21rngd10:10:471
81710,0rcu_preempt19-21ksoftirqd/107:40:031
81710,0rcu_preempt10348-21apt-get10:55:121
81710,0rcu_preempt10348-21apt-get10:55:121
81700,0rcu_preempt19-21ksoftirqd/111:57:141
81680,0rcu_preempt0-21swapper/109:31:451
81670,0rcu_preempt19-21ksoftirqd/107:30:161
81660,0rcu_preempt19-21ksoftirqd/108:01:191
81660,0rcu_preempt17790-21ssh09:19:371
81660,0rcu_preempt17790-21ssh09:19:371
163899662,0cyclictest31222-21ssh10:07:490
163899651,0cyclictest26560-1kworker/0:0H10:39:530
163899651,0cyclictest17585-1kworker/0:2H11:04:000
81640,0rcu_preempt19-21ksoftirqd/109:40:261
163899642,0cyclictest24404-21sshd08:18:030
163899641,0cyclictest4920-21ping07:40:160
163899641,0cyclictest3102-1kworker/0:2H10:19:470
163899641,0cyclictest22268-1kworker/0:0H11:09:250
163899641,0cyclictest1870-1kworker/0:1H09:38:510
163899641,0cyclictest12856-1kworker/0:2H12:09:420
81630,0rcu_preempt19-21ksoftirqd/110:05:131
163899632,0cyclictest3556-1kworker/0:1H11:10:560
163899631,0cyclictest31484-1kworker/0:3H12:26:530
81620,0rcu_preempt0-21swapper/107:15:261
163899622,0cyclictest31787-21ssh11:52:170
163899622,0cyclictest14658-1kworker/0:2H10:30:130
81610,0rcu_preempt19-21ksoftirqd/111:15:231
81610,0rcu_preempt19-21ksoftirqd/110:35:121
81610,0rcu_preempt19-21ksoftirqd/107:59:131
81610,0rcu_preempt18890-21kworker/0:010:00:120
163899614,0cyclictest3-21ksoftirqd/007:20:140
163899611,0cyclictest8236-1kworker/0:0H10:53:410
163899611,0cyclictest17264-1kworker/0:0H11:37:180
163899611,0cyclictest12020-1kworker/0:1H09:50:150
163899611,0cyclictest10874-21munin-node0
163899611,0cyclictest10874-21munin-node0
81600,0rcu_preempt8621-21diskmemload12:20:061
81600,0rcu_preempt8621-21diskmemload12:20:061
163899601,0cyclictest961-21apt-get10:45:110
163899601,0cyclictest17797-21ping08:20:050
163899601,0cyclictest17797-21ping08:20:050
81590,0rcu_preempt19-21ksoftirqd/110:24:401
81590,0rcu_preempt19-21ksoftirqd/108:31:001
163899592,0cyclictest3102-1kworker/0:2H10:15:010
163899592,0cyclictest1101-21ssh11:20:010
163899592,0cyclictest0-21swapper/009:00:100
163899591,0cyclictest14243-21ssh11:33:520
81580,0rcu_preempt26831-1kworker/1:1H12:25:181
81580,0rcu_preempt0-21swapper/110:40:051
163899582,0cyclictest26832-1kworker/0:2H12:30:160
163899581,0cyclictest7906-1kworker/0:1H11:42:590
163899581,0cyclictest27506-1kworker/0:1H08:30:180
163899581,0cyclictest18550-21runrttasks12:13:050
81570,0rcu_preempt19-21ksoftirqd/112:16:561
81570,0rcu_preempt19-21ksoftirqd/111:30:121
81570,0rcu_preempt19-21ksoftirqd/109:20:161
163899572,0cyclictest7315-1kworker/0:3H09:46:310
163899572,0cyclictest26611-1kworker/0:2H11:47:550
163899572,0cyclictest20784-1kworker/0:0H09:25:130
163899572,0cyclictest0-21swapper/009:12:160
163899571,0cyclictest29671-21munin-node0
163899571,0cyclictest29671-21munin-node0
81560,0rcu_preempt19-21ksoftirqd/112:35:321
81560,0rcu_preempt19-21ksoftirqd/110:31:131
81560,0rcu_preempt19-21ksoftirqd/109:25:251
81560,0rcu_preempt19-21ksoftirqd/108:05:171
163899561,0cyclictest4723-21ssh09:40:020
163899561,0cyclictest26832-1kworker/0:2H12:22:030
163899561,0cyclictest26832-1kworker/0:2H12:22:030
81550,0rcu_preempt19-21ksoftirqd/111:10:131
163899558,0cyclictest4920-21ping07:30:180
163899553,0cyclictest0-21swapper/009:34:210
163899552,0cyclictest3168-21ssh11:21:240
81540,0rcu_preempt30322-21kworker/1:009:52:461
81540,0rcu_preempt19-21ksoftirqd/111:25:201
163899543,0cyclictest4920-21ping07:37:030
163899542,0cyclictest6618-1kworker/0:4H09:05:180
163899542,0cyclictest18082-21latency_hist08:00:010
163899541,0cyclictest4923-21munin-run07:19:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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