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2025-07-15 - 22:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Tue Jul 15, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1923621370,0sleep20-21swapper/210:52:382
301532114103,6sleep30-21swapper/307:06:033
30300210988,16sleep10-21swapper/107:07:581
29576210580,18sleep00-21swapper/007:05:190
30209210478,6sleep20-21swapper/207:06:462
313972810,0sleep00-21swapper/011:37:540
250642740,0sleep10-21swapper/112:05:011
45842660,0sleep10-21swapper/112:15:501
30491993917,20cyclictest0-21swapper/211:45:102
3048999340,2cyclictest0-21swapper/012:20:120
3048999290,2cyclictest0-21swapper/007:25:130
302152240,0sleep20-21swapper/210:30:262
302152240,0sleep20-21swapper/210:30:252
271022240,1sleep30-21swapper/311:33:483
30491992217,3cyclictest23891-21ssh10:25:122
30492992017,2cyclictest10183-21kworker/u8:009:39:043
317452190,1sleep131748-21fgrep07:10:241
30492991916,2cyclictest27837-21kworker/u8:110:51:043
30492991815,2cyclictest14186-21kworker/u8:012:02:023
30492991815,2cyclictest10257-21kworker/u8:008:07:053
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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