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2025-12-13 - 20:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 20 highest latencies:
System rack8slot4s.osadl.org (updated Sat Dec 13, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6302572230168,48sleep40-21swapper/407:06:374
6302222218185,21sleep70-21swapper/707:06:087
6304782217165,41sleep20-21swapper/207:09:492
6304522212178,21sleep30-21swapper/307:09:263
6303542209175,21sleep00-21swapper/007:08:020
6302862209175,21sleep60-21swapper/607:07:046
6302812209176,21sleep10-21swapper/107:06:581
6304452204172,20sleep50-21swapper/507:09:205
63073099270,22cyclictest671620-21readlink08:20:017
63073099260,1cyclictest0-21swapper/710:55:007
63072599260,25cyclictest786651-21sendmail11:40:006
630730992519,5cyclictest818884-21idleruntime-cro12:35:017
63073099250,1cyclictest821764-21awk12:40:017
63072199250,24cyclictest763780-21apt11:00:005
63072199250,24cyclictest727087-21apt-get09:55:165
63071699250,25cyclictest668768-21idleruntime-cro08:15:014
630712992521,3cyclictest763779-21idleruntime-cro11:00:003
63071299250,24cyclictest715399-21apt-get09:35:153
63071099250,24cyclictest0-21swapper/212:20:142
630730992420,3cyclictest764227-21apt-get11:00:137
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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