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2026-07-18 - 13:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 50 highest latencies:
System rack9slot3s.osadl.org (updated Sat Jul 18, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591670,40ptp4l0-21swapper/119:05:141
119591580,40ptp4l0-21swapper/019:09:530
2808325447,4sleep20-21swapper/219:09:452
2777725046,2sleep30-21swapper/319:05:493
293752450,0sleep30-21swapper/323:10:173
85192430,0sleep20-21swapper/200:30:232
239762420,0sleep30-21swapper/322:00:153
119591340,1ptp4l14477-21snmp_o5powerctl21:40:221
119591310,0ptp4l0-21swapper/019:40:140
119591210,0ptp4l0-21swapper/000:05:120
119591190,0ptp4l11097-21grep23:35:221
119591190,0ptp4l0-21swapper/120:10:211
119591190,0ptp4l0-21swapper/023:35:210
119591190,0ptp4l0-21swapper/023:30:220
119591180,0ptp4l0-21swapper/122:30:221
119591180,0ptp4l0-21swapper/121:10:161
119591180,0ptp4l0-21swapper/121:00:221
119591170,0ptp4l0-21swapper/123:30:141
119591170,0ptp4l0-21swapper/121:25:151
119591170,0ptp4l0-21swapper/023:12:120
119591170,0ptp4l0-21swapper/021:50:210
119591170,0ptp4l0-21swapper/019:35:220
119591160,2ptp4l6142-21snmp_o5powerctl22:25:220
119591160,1ptp4l7357-21apt-get19:30:121
119591160,1ptp4l27565-21snmp_o5powerctl23:05:220
119591160,1ptp4l19392-21snmp_o5powerctl22:50:222
119591160,1ptp4l1828-21apt-get22:20:122
119591160,1ptp4l1348-21apt-get22:20:021
119591160,0ptp4l0-21swapper/120:20:121
119591160,0ptp4l0-21swapper/100:20:231
119591160,0ptp4l0-21swapper/022:45:150
119591150,1ptp4l8724-21expr21:30:180
119591150,1ptp4l807-21grep21:15:191
119591150,1ptp4l8070-21awk00:30:181
119591150,1ptp4l7738-21cstates20:30:130
119591150,1ptp4l6473-21snmp_o5powerctl20:25:231
119591150,1ptp4l616-21uname21:15:180
119591150,1ptp4l5769-21snmp_o5powerctl23:25:221
119591150,1ptp4l5486-21ntp_states23:25:200
119591150,1ptp4l412-21snmp_o5powerctl23:15:210
119591150,1ptp4l409-21snmp_o5powerctl23:15:201
119591150,1ptp4l3361-21ls20:20:170
119591150,1ptp4l31679-21snmp_o5powerctl19:15:021
119591150,1ptp4l28407-21apt-get19:10:110
119591150,1ptp4l27725-21snmp_o5powerctl22:05:200
119591150,1ptp4l27459-21ls00:05:241
119591150,1ptp4l22767-21apt-get23:00:020
119591150,1ptp4l22413-21snmp_o5powerctl21:55:231
119591150,1ptp4l21874-21snmp_o5powerctl23:55:210
119591150,1ptp4l20232-21aten2.4-expect23:55:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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