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2025-09-17 - 02:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 50 highest latencies:
System rack0slot8s.osadl.org (updated Wed Sep 17, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991980,89ptp4l0-21swapper/119:10:001
94980960,91rtkit-daemon0-21swapper/1019:09:512
159472680,0sleep40-21swapper/419:05:186
1765226554,9sleep00-21swapper/019:09:160
1740526556,7sleep50-21swapper/519:05:447
1750326352,9sleep110-21swapper/1119:07:013
1749926250,10sleep70-21swapper/719:06:589
1749826253,7sleep60-21swapper/619:06:578
217152610,0sleep50-21swapper/519:55:017
74702590,0sleep10-21swapper/121:40:191
70512580,0sleep100-21swapper/1022:25:222
240392540,0sleep10-21swapper/123:30:201
1804499212,14cyclictest0-21swapper/420:44:596
18072992017,2cyclictest25894-21awk23:35:002
1804499191,17cyclictest0-21swapper/419:45:176
1805399182,10cyclictest0-21swapper/619:25:008
1803499184,9cyclictest0-21swapper/220:20:004
1803499183,10cyclictest0-21swapper/223:10:014
1803499183,10cyclictest0-21swapper/223:10:004
1802599185,8cyclictest0-21swapper/119:30:001
124062180,0sleep20-21swapper/219:40:194
275991170,0ptp4l0-21swapper/122:10:161
1805799173,9cyclictest0-21swapper/721:45:009
1805799171,12cyclictest10332-21kworker/u24:121:55:019
1804899173,9cyclictest0-21swapper/522:05:017
275991160,1ptp4l21-21ksoftirqd/123:25:211
275991160,0ptp4l0-21swapper/122:47:351
191591160,0getstats0-21swapper/221:00:314
1805399162,12cyclictest10332-21kworker/u24:120:45:008
275991150,1ptp4l21-21ksoftirqd/119:45:151
275991150,0ptp4l0-21swapper/123:55:231
275991150,0ptp4l0-21swapper/122:25:251
275991150,0ptp4l0-21swapper/121:50:191
1805399153,7cyclictest0-21swapper/623:25:008
1805399153,7cyclictest0-21swapper/623:25:008
1805399152,7cyclictest0-21swapper/620:10:018
1804899153,8cyclictest0-21swapper/521:30:007
1804899152,8cyclictest0-21swapper/521:05:007
1803499153,8cyclictest0-21swapper/220:15:014
1803499150,3cyclictest0-21swapper/223:45:144
1802599153,7cyclictest0-21swapper/100:15:001
275991140,0ptp4l0-21swapper/120:45:131
1806299143,7cyclictest0-21swapper/800:05:0110
1806299142,8cyclictest0-21swapper/823:15:0110
1806299142,8cyclictest0-21swapper/823:15:0010
1805799143,7cyclictest0-21swapper/700:22:569
1805799142,7cyclictest0-21swapper/700:40:009
1805799141,8cyclictest0-21swapper/722:35:009
1805399142,7cyclictest0-21swapper/621:00:018
1805399142,7cyclictest0-21swapper/600:15:008
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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