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2024-04-25 - 10:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot4s.osadl.org (updated Thu Apr 25, 2024 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2976399370,19cyclictest31234-21ntp_states21:00:212
2976499351,31cyclictest3551-40apt-check22:55:053
2976499350,32cyclictest5650-21sh23:00:143
2976499340,32cyclictest0-21swapper/319:15:003
2976499340,31cyclictest29129-21fschecks_time20:55:153
2976399340,19cyclictest24925-21sshd23:58:032
2976399340,18cyclictest31576-21ntp_states22:40:212
29763993310,20cyclictest11881-21latency21:40:212
2976499322,27cyclictest20106-21grep20:25:273
2976499320,29cyclictest17049-21apt-key20:20:003
2976499320,17cyclictest7009-21awk19:49:593
29763993212,17cyclictest24398-21tr22:20:102
2976399321,15cyclictest26819-21apt-get00:05:112
2976499312,22cyclictest3091-21python322:54:593
2976499311,28cyclictest14371-21lsb_release21:50:003
2976499311,27cyclictest24397-21grep22:20:093
29764993111,18cyclictest20708-21awk22:05:293
29764993111,17cyclictest4645-21dpkg21:20:013
29764993110,19cyclictest28328-21sed00:10:003
2976499310,29cyclictest0-21swapper/300:35:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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