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2024-05-25 - 09:30

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 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 rack8slot4s.osadl.org (updated Sat May 25, 2024 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16324562240175,21sleep50-21swapper/519:06:245
16324792226168,20sleep20-21swapper/219:06:382
16326492223170,17sleep10-21swapper/119:09:021
16326552221166,43sleep70-21swapper/719:09:087
16325612221165,18sleep60-21swapper/619:07:466
16326992218163,17sleep40-21swapper/419:09:464
16326512213160,42sleep30-21swapper/319:09:043
16325372213184,18sleep00-21swapper/019:07:240
163294599270,21cyclictest1814649-21sh00:20:013
163294599250,1cyclictest1794951-21apt-get23:45:143
163294599250,1cyclictest1794951-21apt-get23:45:143
1632957992423,1cyclictest0-21swapper/700:10:107
1632957992422,1cyclictest1720218-21apt-get21:35:127
163295799240,23cyclictest0-21swapper/722:15:107
1632955992421,3cyclictest1774237-21awk23:10:006
163295599240,22cyclictest1826367-21turbostat00:40:016
163295299240,23cyclictest1771358-21munin-run23:05:005
1632945992421,2cyclictest1723099-21apt-get21:40:123
163294599240,1cyclictest1688154-21apt-get20:40:113
1632941992423,1cyclictest0-21swapper/222:15:102
163294199240,23cyclictest0-21swapper/200:30:102
163293299240,23cyclictest0-21swapper/023:25:120
1632957992321,1cyclictest1779944-21run-parts23:20:007
163295599230,22cyclictest1803086-21cron00:00:006
163295599230,22cyclictest0-21swapper/621:00:136
163295299230,22cyclictest1788535-21idleruntime-cro23:35:005
163295299230,22cyclictest0-21swapper/519:15:005
163295099230,22cyclictest1702360-21munin-run21:04:594
1632945992323,0cyclictest0-21swapper/300:00:123
1632945992322,1cyclictest0-21swapper/321:15:113
1632945992321,1cyclictest1751722-21apt-get22:30:093
1632945992318,4cyclictest0-21swapper/321:25:003
163294599230,22cyclictest1679290-21apt-get20:25:123
163294599230,22cyclictest0-21swapper/320:50:113
163294599230,1cyclictest1731253-21munin-run21:55:003
1632941992323,0cyclictest0-21swapper/221:35:112
1632941992322,0cyclictest0-21swapper/200:10:112
163294199230,22cyclictest1702780-21apt-get21:05:142
163294199230,22cyclictest0-21swapper/222:59:592
1632936992323,0cyclictest0-21swapper/123:20:121
1632936992323,0cyclictest0-21swapper/122:55:131
1632936992321,1cyclictest1777491-21apt-get23:15:121
163293699230,22cyclictest650-21dbus-daemon19:20:111
163293699230,22cyclictest1693453-21munin-run20:50:011
163293699230,22cyclictest0-21swapper/122:30:171
163293299230,23cyclictest1642904-21awk19:25:010
163293299230,22cyclictest0-21swapper/021:30:120
1632957992221,1cyclictest1768922-21apt-get23:00:157
1632957992221,1cyclictest1658458-21apt-get19:50:117
1632957992220,2cyclictest1710980-21awk21:19:597
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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