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2025-04-02 - 04:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 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 rack0slot8s.osadl.org (updated Wed Apr 02, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94980940,88rtkit-daemon0-21swapper/1019:06:152
275991870,77ptp4l0-21swapper/119:06:331
1766026654,10sleep50-21swapper/519:06:107
1785426554,9sleep110-21swapper/1119:09:053
1697426553,9sleep70-21swapper/719:05:249
1782326352,9sleep60-21swapper/619:08:368
1761926352,9sleep40-21swapper/419:05:336
1579526250,9sleep00-21swapper/019:05:180
48222550,0sleep70-21swapper/721:05:009
18335993426,8cyclictest0-21swapper/1022:20:242
1830699243,16cyclictest0-21swapper/422:00:026
1829799213,11cyclictest0-21swapper/222:55:004
1830699192,13cyclictest0-21swapper/400:35:006
18335991814,1cyclictest0-21swapper/1022:50:172
18335991810,8cyclictest0-21swapper/1023:15:162
1828899172,10cyclictest0-21swapper/021:35:010
141022177,7sleep80-21swapper/819:05:0110
53072160,1sleep8621rcuc/819:30:2710
53072160,1sleep8621rcuc/819:30:2710
47332160,0sleep70-21swapper/722:44:599
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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