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2025-05-05 - 01:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 rack7slot4s.osadl.org (updated Sun May 04, 2025 12:45:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11839996125,24cyclictest27-21ksoftirqd/209:50:162
11816996029,23cyclictest7520-21sendmail-msp12:00:170
1183999566,34cyclictest27-21ksoftirqd/208:00:172
1183999542,41cyclictest0-21swapper/208:50:152
11839994932,11cyclictest27-21ksoftirqd/208:40:142
1181699481,31cyclictest20339-21sendmail-msp09:00:140
1182899472,38cyclictest14220-21sendmail-msp08:20:141
1183999461,38cyclictest0-21swapper/210:25:142
1182899432,11cyclictest131rcu_preempt10:50:131
11839994226,10cyclictest261rcuc/211:50:142
11839994222,16cyclictest27-21ksoftirqd/211:40:142
11839994216,22cyclictest27-21ksoftirqd/212:05:142
11839994216,22cyclictest27-21ksoftirqd/212:05:142
1182899423,35cyclictest12356-21sendmail-msp09:20:171
1183999411,12cyclictest601-21rngd09:00:142
1182899413,35cyclictest4141-21sendmail-msp10:40:161
1182899411,37cyclictest2141-21sendmail-msp11:00:161
1182899411,37cyclictest2141-21sendmail-msp11:00:161
1184899402,34cyclictest0-21swapper/307:15:153
1183999401,34cyclictest4783-21apt-get08:10:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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