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2026-06-28 - 20:55

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 Sun Jun 28, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591620,30ptp4l0-21swapper/007:07:050
119591620,29ptp4l0-21swapper/107:07:071
1044625448,4sleep20-21swapper/207:06:072
9822520,0sleep20-21swapper/209:50:162
1042225046,2sleep30-21swapper/307:05:483
77642490,0sleep30-21swapper/308:00:203
265552450,0sleep10-21swapper/108:35:251
1075023027,1sleep30-21swapper/307:10:013
119591220,1ptp4l13025-21ls09:10:230
78492200,0sleep10-21swapper/111:05:141
119591190,0ptp4l0-21swapper/007:30:160
119591170,0ptp4l0-21swapper/111:20:201
119591170,0ptp4l0-21swapper/110:50:151
119591170,0ptp4l0-21swapper/012:25:140
119591170,0ptp4l0-21swapper/009:00:180
119591170,0ptp4l0-21swapper/009:00:180
1101099171,9cyclictest0-21swapper/208:10:132
119591160,2ptp4l12359-21snmp_o5powerctl10:10:220
119591160,1ptp4l25115-21ls12:35:241
119591160,1ptp4l18859-21apt-get10:25:140
119591160,0ptp4l0-21swapper/109:30:191
288772150,1sleep125-21ksoftirqd/111:45:011
119591150,2ptp4l33-21ksoftirqd/209:00:162
119591150,2ptp4l33-21ksoftirqd/209:00:162
119591150,1ptp4l7323-21apt-get12:05:130
119591150,1ptp4l7043-21snmp_o5powerctl10:00:220
119591150,1ptp4l4160-21ls10:55:211
119591150,1ptp4l31050-21df07:45:131
119591150,1ptp4l30424-21apt-get08:45:131
119591150,1ptp4l29605-21snmp_o5powerctl07:40:211
119591150,1ptp4l28466-21hddtemp_smartct08:40:160
119591150,1ptp4l27778-21apt-get08:40:131
119591150,1ptp4l25483-21snmp_o5powerctl11:35:210
119591150,1ptp4l2322-21snmp_o5powerctl08:50:191
119591150,1ptp4l22247-21snmp_o5powerctl12:30:201
119591150,1ptp4l19519-21ls11:25:180
119591150,1ptp4l0-21swapper/010:35:260
119591150,0ptp4l0-21swapper/207:25:222
119591150,0ptp4l0-21swapper/112:12:271
119591150,0ptp4l0-21swapper/112:12:271
119591150,0ptp4l0-21swapper/107:30:231
119591150,0ptp4l0-21swapper/010:30:130
119591150,0ptp4l0-21swapper/009:15:170
119591150,0ptp4l0-21swapper/008:00:110
119591150,0ptp4l0-21swapper/007:10:130
119591140,2ptp4l17649-21phc2sys-jitter10:20:201
119591140,1ptp4l7794-21snmp_o5powerctl08:00:201
119591140,1ptp4l5784-21irqstats12:00:180
119591140,1ptp4l31289-21timerwakeupswit10:45:231
119591140,1ptp4l27512-21cstates09:40:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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