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2025-07-02 - 13:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Wed Jul 02, 2025 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2146021140,0sleep10-21swapper/123:37:271
9354210461,39sleep30-21swapper/319:09:553
9354210461,39sleep30-21swapper/319:09:553
9150210288,9sleep10-21swapper/119:07:161
9150210288,9sleep10-21swapper/119:07:151
908028370,9sleep00-21swapper/019:06:220
908028370,9sleep00-21swapper/019:06:210
905727868,6sleep20-21swapper/219:06:042
905727868,6sleep20-21swapper/219:06:042
944999280,28cyclictest0-21swapper/222:39:212
9445992621,4cyclictest29839-21cat23:20:271
944999250,25cyclictest0-21swapper/222:40:012
944999250,25cyclictest0-21swapper/200:28:502
9445992518,6cyclictest2711-21diskmemload21:42:371
9453992421,2cyclictest4194-21hddtemp_smartct23:25:233
9453992421,2cyclictest1998-21apache_volume00:10:173
9453992421,2cyclictest1998-21apache_volume00:10:163
9449992421,2cyclictest3961-21df_inode23:25:212
944599245,15cyclictest0-21swapper/122:25:181
9440992421,2cyclictest15500-21munin-node23:15:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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