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2026-07-06 - 22:40

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 rack9slot4s (updated Mon Jul 06, 2026 12:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23349912181207,7cyclictest13143-21df07:50:131
23349911011092,6cyclictest0-21swapper/107:25:061
18492578531,32sleep00-21swapper/007:20:410
18562577531,30sleep10-21swapper/107:20:461
233399238206,22cyclictest0-21swapper/007:25:060
233399143118,8cyclictest0-21swapper/007:50:140
114382970,7sleep1233499cyclictest09:10:241
58062730,4sleep028501-21kworker/0:008:55:250
323282640,4sleep1211ktimersoftd/110:05:271
31282620,4sleep03133-21needreboot11:40:210
233499576,18cyclictest2695-21snmpd11:54:331
233499566,15cyclictest8298-21sh11:55:151
233499557,16cyclictest19101-21iostat08:05:191
233499555,17cyclictest14987-21taskset12:11:001
233499546,15cyclictest8915-21taskset07:39:561
233499544,15cyclictest14508-21fschecks_time10:45:161
233499543,17cyclictest24887-21cat12:40:001
233499535,15cyclictest13299-21taskset12:07:561
233499526,7cyclictest0-21swapper/108:20:301
233499526,16cyclictest5664-21cat07:30:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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