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2026-06-22 - 02:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 50 highest latencies:
System rackeslot5s.osadl.org (updated Sun Jun 21, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24279992625,1cyclictest34-21ksoftirqd/312:30:013
2426799261,24cyclictest0-21swapper/011:30:530
24279992524,1cyclictest34-21ksoftirqd/309:46:243
24279992523,1cyclictest0-21swapper/311:28:383
24277992523,1cyclictest8509-21munin-plugin-st11:05:002
24272992522,2cyclictest32210-21ssh09:54:201
2427299250,24cyclictest19373-21sh10:12:171
24267992522,2cyclictest30572-21rm10:23:410
2426799250,24cyclictest9810-21ssh11:36:370
2426799250,24cyclictest18465-21diskmemload10:38:040
24279992423,1cyclictest34-21ksoftirqd/311:09:503
2427999240,24cyclictest0-21swapper/311:11:553
2427999240,23cyclictest18465-21diskmemload10:00:453
2427999240,23cyclictest0-21swapper/308:15:173
2427999240,1cyclictest19301-21grep11:15:183
24277992420,3cyclictest0-21swapper/210:56:132
2427799240,24cyclictest0-21swapper/210:03:022
2427799240,23cyclictest9760-21rm11:36:332
2427799240,23cyclictest3949-21ssh09:57:362
2427799240,23cyclictest0-21swapper/211:51:312
2427799240,23cyclictest0-21swapper/211:26:462
2427299243,3cyclictest21697-21sh09:12:081
24272992424,0cyclictest18465-21diskmemload11:43:061
24272992423,1cyclictest18465-21diskmemload10:41:121
24272992422,1cyclictest0-21swapper/110:05:201
2427299240,24cyclictest0-21swapper/109:22:091
2427299240,23cyclictest19107-21apt-get11:15:171
2427299240,23cyclictest0-21swapper/111:20:091
2427299240,1cyclictest3456-21ssh10:28:271
2427299240,1cyclictest151rcu_preempt09:35:531
2427299240,1cyclictest0-21swapper/110:40:011
24267992424,0cyclictest0-21swapper/010:07:380
24267992423,1cyclictest8286-21ssh12:38:300
24267992423,1cyclictest0-21swapper/011:22:150
2426799241,1cyclictest15442-21sh12:14:480
2426799240,24cyclictest18465-21diskmemload10:52:490
2426799240,23cyclictest21711-21sh11:16:420
2426799240,23cyclictest18465-21diskmemload09:54:560
2426799240,23cyclictest0-21swapper/010:48:580
2426799240,1cyclictest18465-21diskmemload10:11:290
2426799240,1cyclictest0-21swapper/010:56:480
24279992323,0cyclictest18465-21diskmemload09:27:423
24279992323,0cyclictest0-21swapper/311:40:483
24279992321,1cyclictest0-21swapper/312:02:033
24279992321,1cyclictest0-21swapper/311:04:243
24279992321,1cyclictest0-21swapper/310:28:223
2427999231,21cyclictest34-21ksoftirqd/310:15:223
2427999230,2cyclictest16827-21ethtool12:15:193
2427999230,23cyclictest0-21swapper/310:56:013
2427999230,23cyclictest0-21swapper/309:10:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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