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2026-05-14 - 12:28

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 Thu May 14, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1300917731,43phc2sys0-21swapper/119:07:021
119591660,45ptp4l0-21swapper/019:08:540
1253325145,4sleep20-21swapper/219:05:352
1265125046,2sleep30-21swapper/319:07:043
1300913927,1phc2sys0-21swapper/119:10:011
119591220,0ptp4l0-21swapper/123:42:451
119591180,0ptp4l0-21swapper/022:30:230
119591170,2ptp4l0-21swapper/019:35:010
119591170,0ptp4l0-21swapper/100:20:181
119591160,1ptp4l7347-21apt-get23:00:131
119591160,1ptp4l4171-21apt-get21:55:021
119591160,1ptp4l31611-21apt-get23:45:020
119591160,1ptp4l21010-21apt-get00:25:130
119591160,0ptp4l33-21ksoftirqd/221:30:142
119591160,0ptp4l0-21swapper/022:55:220
119591160,0ptp4l0-21swapper/019:45:180
119591160,0ptp4l0-21swapper/019:30:180
119591150,1ptp4l9994-21apt-get23:05:120
119591150,1ptp4l9432-21ls00:00:220
119591150,1ptp4l9013-21snmp_o5powerctl23:00:220
119591150,1ptp4l772-21snmp_o5powerctl21:45:220
119591150,1ptp4l742-21irqstats23:45:191
119591150,1ptp4l6294-21snmp_o5powerctl21:55:210
119591150,1ptp4l5592-21fw_packets20:55:141
119591150,1ptp4l3708-21snmp_o5powerctl22:50:211
119591150,1ptp4l30171-21irqrtprio22:40:170
119591150,1ptp4l28696-21ls20:35:242
119591150,1ptp4l28508-21users22:35:251
119591150,1ptp4l28477-21snmp_o5powerctl20:35:221
119591150,1ptp4l27876-21smartctl19:35:151
119591150,1ptp4l27688-21ntp_states00:35:190
119591150,1ptp4l25249-21snmp_o5powerctl21:30:211
119591150,1ptp4l23185-21snmp_o5powerctl20:25:211
119591150,1ptp4l22684-21snmp_o5powerctl00:25:231
119591150,1ptp4l22581-21hddtemp_smartct19:25:150
119591150,1ptp4l19724-21/usr/sbin/munin19:20:140
119591150,1ptp4l17288-21snmp_o5powerctl21:15:240
119591150,1ptp4l16466-21memory22:15:180
119591150,1ptp4l14722-21snmp_o5powerctl00:10:220
119591150,1ptp4l12589-21apt-get22:10:120
119591150,0ptp4l0-21swapper/123:55:121
119591150,0ptp4l0-21swapper/123:50:131
119591150,0ptp4l0-21swapper/123:30:161
119591150,0ptp4l0-21swapper/122:00:121
119591150,0ptp4l0-21swapper/121:25:121
119591150,0ptp4l0-21swapper/120:10:121
119591150,0ptp4l0-21swapper/100:35:121
119591150,0ptp4l0-21swapper/100:30:121
119591150,0ptp4l0-21swapper/100:05:221
119591150,0ptp4l0-21swapper/023:57:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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