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2025-12-23 - 19:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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 rackeslot8s.osadl.org (updated Tue Dec 23, 2025 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12287489912970,1293cyclictest12503772sleep307:25:013
12287489911410,1137cyclictest14243072sleep309:39:573
122874899227,6cyclictest0-21swapper/309:50:163
1228748992118,1cyclictest0-21swapper/312:25:003
1228748992118,1cyclictest0-21swapper/309:25:163
301798190,5rtkit-daemon0-21swapper/007:20:260
122874899199,2cyclictest1353496-21turbostat08:44:593
1228748991916,1cyclictest0-21swapper/311:55:013
1228748991913,2cyclictest1347078-21sleep08:40:003
1228748991810,6cyclictest0-21swapper/312:25:243
1228748991810,5cyclictest1604362-21sleep12:00:003
1228748991810,5cyclictest1372708-21sleep09:00:003
1228748991810,4cyclictest1430743-21turbostat09:45:003
122874899177,7cyclictest1320874-21sleep08:20:003
122874899176,8cyclictest1288776-21turbostat07:55:003
122874899175,9cyclictest1462866-21turbostat10:10:003
122874899173,10cyclictest13537342sleep308:45:133
1228748991711,3cyclictest1398647-21sleep09:20:013
122874899168,5cyclictest1565870-21sleep11:29:593
122874899165,8cyclictest1578984-21taskset11:40:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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