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2025-11-18 - 15:49

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 Tue Nov 18, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt3-21ksoftirqd/011:32:250
235422960,0sleep010050irq/346-484840008:18:370
235422960,0sleep010050irq/346-484840008:18:370
81950,0rcu_preempt19-21ksoftirqd/110:55:031
184882940,0sleep010050irq/346-484840008:01:540
81900,0rcu_preempt19-21ksoftirqd/112:11:391
81870,0rcu_preempt19-21ksoftirqd/111:30:541
81870,0rcu_preempt19-21ksoftirqd/111:20:191
81840,0rcu_preempt19-21ksoftirqd/107:24:541
81830,0rcu_preempt19-21ksoftirqd/111:43:211
81830,0rcu_preempt19-21ksoftirqd/111:43:211
81790,0rcu_preempt19-21ksoftirqd/111:24:511
81790,0rcu_preempt19-21ksoftirqd/111:07:571
81780,0rcu_preempt19-21ksoftirqd/111:03:391
81750,0rcu_preempt19-21ksoftirqd/112:37:591
81750,0rcu_preempt19-21ksoftirqd/110:53:421
81740,0rcu_preempt751-21rngd12:21:371
81740,0rcu_preempt19-21ksoftirqd/109:59:391
81730,0rcu_preempt751-21rngd12:26:061
81730,0rcu_preempt0-21swapper/112:34:021
81720,0rcu_preempt3-21ksoftirqd/010:40:010
254362720,0sleep19950irq/345-484840008:24:411
81700,0rcu_preempt3-21ksoftirqd/011:54:430
81690,0rcu_preempt19-21ksoftirqd/112:05:131
81690,0rcu_preempt19-21ksoftirqd/111:16:301
81690,0rcu_preempt0-21swapper/109:53:381
81680,0rcu_preempt19-21ksoftirqd/112:18:021
701996821,0cyclictest4019-21ping07:34:550
701996821,0cyclictest17110-1kworker/0:1H12:22:210
81670,0rcu_preempt3-21ksoftirqd/011:19:470
81660,0rcu_preempt3-21ksoftirqd/011:53:530
81660,0rcu_preempt19-21ksoftirqd/109:18:451
81650,0rcu_preempt3-21ksoftirqd/012:30:160
81640,0rcu_preempt3-21ksoftirqd/008:45:000
81640,0rcu_preempt19-21ksoftirqd/109:45:241
701996418,0cyclictest0-21swapper/010:33:480
188822640,0sleep010050irq/346-484840008:04:400
81630,0rcu_preempt19-21ksoftirqd/110:39:241
81630,0rcu_preempt19-21ksoftirqd/110:39:241
81630,0rcu_preempt19-21ksoftirqd/110:05:131
701996318,0cyclictest0-21swapper/012:35:150
250002630,0sleep010050irq/346-484840008:21:320
81620,0rcu_preempt19-21ksoftirqd/110:25:371
81620,0rcu_preempt0-21swapper/111:10:481
701996223,0cyclictest16863-1kworker/0:1H10:14:290
701996222,0cyclictest9293-1kworker/0:3H09:58:320
81610,0rcu_preempt19-21ksoftirqd/111:39:271
701996122,0cyclictest16863-1kworker/0:1H10:07:140
701996028,0cyclictest0-21swapper/012:24:510
701996017,0cyclictest0-21swapper/012:03:110
701996017,0cyclictest0-21swapper/010:54:240
81590,0rcu_preempt3-21ksoftirqd/009:34:530
81590,0rcu_preempt19-21ksoftirqd/109:27:271
701995926,0cyclictest1944-1kworker/0:3H09:49:200
701995924,0cyclictest4586-1kworker/0:1H12:10:110
701995923,0cyclictest6797-21apt-get11:24:520
701995922,0cyclictest1383-1kworker/0:0H12:06:060
315212590,0sleep09950irq/345-484840009:43:260
218172590,0sleep010050irq/346-484840008:12:370
81580,0rcu_preempt19-21ksoftirqd/111:56:381
701995826,0cyclictest3647-21latency_hist10:34:380
701995826,0cyclictest3647-21latency_hist10:34:380
701995826,0cyclictest31921-21apt-get11:14:500
701995825,0cyclictest25460-21apt-get08:24:520
701995824,0cyclictest4019-21ping07:44:520
701995823,0cyclictest4019-21ping07:40:180
701995822,0cyclictest20009-1kworker/0:1H11:00:510
701995821,0cyclictest9372-1kworker/0:0H09:10:560
169392580,0sleep010050irq/346-484840007:58:010
81570,0rcu_preempt3-21ksoftirqd/010:00:390
81570,0rcu_preempt19-21ksoftirqd/110:18:371
81570,0rcu_preempt19-21ksoftirqd/109:39:271
701995725,0cyclictest14622-21runrttasks09:19:260
701995723,0cyclictest0-21swapper/010:14:520
701995722,0cyclictest23949-1kworker/0:0H10:20:310
701995721,0cyclictest13229-21ssh10:47:210
701995720,0cyclictest16357-1kworker/0:2H09:27:060
81560,0rcu_preempt27089-21apt-get08:29:491
81560,0rcu_preempt19-21ksoftirqd/111:47:161
81560,0rcu_preempt19-21ksoftirqd/110:30:351
701995625,0cyclictest5923-1kworker/0:3H11:07:280
701995624,0cyclictest22136-21munin-node0
701995623,0cyclictest30067-21ssh10:25:080
701995622,0cyclictest4019-21ping07:24:540
701995622,0cyclictest16207-21rm09:20:200
81550,0rcu_preempt3-21ksoftirqd/011:44:520
81550,0rcu_preempt19-21ksoftirqd/110:02:321
81550,0rcu_preempt19-21ksoftirqd/109:41:441
701995524,0cyclictest4785-21fschecks_time08:59:570
701995524,0cyclictest31573-1kworker/0:4H08:42:530
701995524,0cyclictest13997-21munin-node0
701995523,0cyclictest4783-21ssh09:50:240
701995523,0cyclictest13848-21ssh12:17:550
701995523,0cyclictest12445-1kworker/0:3H11:39:540
701995523,0cyclictest12445-1kworker/0:3H11:39:540
701995520,0cyclictest0-21swapper/007:34:380
81540,0rcu_preempt3-21ksoftirqd/011:09:490
701995425,0cyclictest0-21swapper/008:29:490
701995423,0cyclictest0-21swapper/010:54:500
701995421,0cyclictest0-21swapper/008:50:160
701995322,0cyclictest2394-21latency_hist07:14:380
701995318,0cyclictest5180-21sed07:20:140
701995224,0cyclictest2888-21munin-node0
275432520,0sleep19950irq/345-484840010:22:031
701995124,0cyclictest2060-1kworker/0:3H07:15:090
701995119,0cyclictest0-21swapper/008:38:180
81500,0rcu_preempt19-21ksoftirqd/108:19:491
81500,0rcu_preempt0-21swapper/110:40:361
701995026,0cyclictest0-21swapper/007:49:480
9950490,0irq/345-484840029843-1kworker/0:0H07:04:540
81490,0rcu_preempt25756-21ntp_states11:50:091
81490,0rcu_preempt19-21ksoftirqd/111:59:541
81490,0rcu_preempt19-21ksoftirqd/108:11:551
81490,0rcu_preempt19-21ksoftirqd/107:35:041
81480,0rcu_preempt26663-21kworker/1:109:10:091
81480,0rcu_preempt21872-21apt-get09:29:511
701994820,0cyclictest7603-21runrttasks09:09:120
81470,0rcu_preempt19-21ksoftirqd/110:44:571
81470,0rcu_preempt19-21ksoftirqd/110:10:011
81460,0rcu_preempt965-21lighttpd08:15:011
81460,0rcu_preempt965-21lighttpd08:15:011
81460,0rcu_preempt19-21ksoftirqd/109:05:001
81460,0rcu_preempt19-21ksoftirqd/107:44:521
81450,0rcu_preempt19-21ksoftirqd/108:53:541
81450,0rcu_preempt19-21ksoftirqd/108:04:561
81450,0rcu_preempt19-21ksoftirqd/107:30:141
81440,0rcu_preempt856-21apt-get07:09:521
81440,0rcu_preempt19-21ksoftirqd/109:19:461
81430,0rcu_preempt32017-21apt-get08:44:511
81430,0rcu_preempt19-21ksoftirqd/108:54:511
81420,0rcu_preempt19-21ksoftirqd/107:49:591
81420,0rcu_preempt19-21ksoftirqd/107:39:561
81410,0rcu_preempt26663-21kworker/1:108:39:391
81410,0rcu_preempt19-21ksoftirqd/107:20:051
81400,0rcu_preempt19-21ksoftirqd/108:03:401
81400,0rcu_preempt19-21ksoftirqd/107:19:381
81390,0rcu_preempt19-21ksoftirqd/107:59:091
81390,0rcu_preempt19-21ksoftirqd/107:04:521
81390,0rcu_preempt0-21swapper/109:02:431
81370,0rcu_preempt19-21ksoftirqd/108:39:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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