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2025-09-15 - 12:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack9slot8s.osadl.org (updated Mon Sep 15, 2025 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
818502040,0irq/46-4a1000006154-21kworker/0:219:09:060
63269911827,0cyclictest26170-21sh21:12:000
63269911333,0cyclictest21983-21sshd00:29:150
63269911331,0cyclictest1413-21sh21:28:170
63269911231,0cyclictest10623-21ssh21:47:390
63269911228,0cyclictest26985-21runrttasks22:22:050
63269911029,0cyclictest4584-21ssh21:34:580
63269910938,0cyclictest81850irq/46-4a10000022:35:490
63269910929,0cyclictest7413-21sh21:40:470
63269910928,0cyclictest14283-21sh21:55:190
63269910927,0cyclictest29603-21ssh23:36:370
63269910745,0cyclictest81850irq/46-4a10000021:52:030
63269910731,0cyclictest15201-21runrttasks00:30:040
63269910730,0cyclictest7871-21apt-config22:50:140
63269910730,0cyclictest32733-21diskmemload22:34:290
63269910728,0cyclictest8619-21apt-config19:19:570
63269910640,0cyclictest81850irq/46-4a10000000:01:140
63269910632,0cyclictest17798-21apt-config20:20:020
63269910631,0cyclictest20815-21diskmemload22:09:120
63269910631,0cyclictest15724-21sshd23:07:170
63269910629,0cyclictest23843-21diskmemload23:24:320
63269910629,0cyclictest18031-21diskmemload23:12:120
63269910628,0cyclictest30484-21sh21:21:020
63269910628,0cyclictest28636-21diskmemload23:34:420
63269910535,0cyclictest5988-21sshd23:55:140
63269910337,0cyclictest81850irq/46-4a10000000:25:010
63269910330,0cyclictest24277-21diskmemload23:25:160
63269910242,0cyclictest101ktimersoftd/023:20:020
63269910236,0cyclictest101ktimersoftd/000:07:380
63269910227,0cyclictest15203-21runrttasks00:14:560
63269910142,0cyclictest81850irq/46-4a10000023:48:300
63269910138,0cyclictest81850irq/46-4a10000021:15:390
632699999,0cyclictest12856-21seq19:48:230
6326999939,0cyclictest101ktimersoftd/022:25:400
6326999933,0cyclictest81850irq/46-4a10000022:13:150
6326999929,0cyclictest6324-21cyclictest20:18:160
6326999911,0cyclictest8408-21apt-get19:19:520
6326999529,0cyclictest6324-21cyclictest20:58:370
6326999428,0cyclictest0-21swapper21:36:300
6326999229,0cyclictest15201-21runrttasks19:42:520
6326999028,0cyclictest0-21swapper23:01:060
6326999026,0cyclictest0-21swapper22:56:100
6326999025,0cyclictest0-21swapper23:53:180
6326998727,0cyclictest0-21swapper00:15:330
6326997527,0cyclictest0-21swapper23:44:140
6326996533,0cyclictest0-21swapper22:19:000
6326996433,0cyclictest0-21swapper00:36:030
81850630,0irq/46-4a1000000-21swapper20:54:550
101610,0ktimersoftd/00-21swapper19:31:490
81850600,0irq/46-4a1000000-21swapper22:03:190
6326995931,0cyclictest0-21swapper22:47:450
6326995627,0cyclictest3557-21kworker/u2:722:44:240
6326995530,0cyclictest0-21swapper20:09:530
101550,0ktimersoftd/00-21swapper19:38:310
81850540,0irq/46-4a1000003687-1kworker/u3:219:10:060
101540,0ktimersoftd/00-21swapper19:50:550
101530,0ktimersoftd/00-21swapper21:09:520
6326995242,0cyclictest81850irq/46-4a10000019:59:520
6326995140,0cyclictest81850irq/46-4a10000020:13:080
101500,0ktimersoftd/00-21swapper20:27:520
81850490,0irq/46-4a1000009675-1kworker/u3:219:26:490
6326994940,0cyclictest81850irq/46-4a10000021:00:210
6326994940,0cyclictest101ktimersoftd/020:34:530
6326994933,0cyclictest20078-21runrttasks20:35:200
6326994736,0cyclictest81850irq/46-4a10000020:44:460
6326994731,0cyclictest14901-21cron20:47:530
6326994528,0cyclictest14657-21seq19:59:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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