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2026-03-26 - 14:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Thu Mar 26, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3938592267229,29sleep50-21swapper/519:06:255
3938512264216,17sleep60-21swapper/619:06:186
3940762262215,15sleep10-21swapper/119:09:181
3938752260211,17sleep30-21swapper/319:06:383
3938612257215,33sleep70-21swapper/719:06:267
3939452252210,32sleep20-21swapper/219:07:342
3940152247220,17sleep00-21swapper/019:08:280
3939922247222,17sleep40-21swapper/419:08:094
394434993430,3cyclictest1385-21snmpd21:55:126
394434993430,3cyclictest1385-21snmpd21:55:116
394434993023,5cyclictest466104-21pgrep21:16:136
394425992820,4cyclictest1385-21snmpd21:40:124
394425992721,3cyclictest1385-21snmpd23:33:454
394425992721,2cyclictest1385-21snmpd21:20:264
394425992721,1cyclictest1385-21snmpd22:54:134
39442599271,22cyclictest0-21swapper/420:30:094
39441599270,25cyclictest0-21swapper/200:15:562
394437992622,3cyclictest1385-21snmpd22:56:297
394437992622,3cyclictest1385-21snmpd22:06:017
39443799260,24cyclictest0-21swapper/721:48:057
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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