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2026-07-02 - 03:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot8s.osadl.org (updated Thu Jul 02, 2026 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
302282700,1sleep41068-21runrttasks22:05:164
111391640,31ptp4l0-21swapper/019:06:060
111391640,31ptp4l0-21swapper/019:06:060
111391640,2ptp4l0-21swapper/519:06:295
111391640,2ptp4l0-21swapper/519:06:285
111391620,5ptp4l0-21swapper/419:05:314
111391620,5ptp4l0-21swapper/419:05:314
36052610,1sleep449-21ksoftirqd/400:30:004
36052610,1sleep449-21ksoftirqd/400:30:004
111391600,29ptp4l0-21swapper/119:06:081
111391600,29ptp4l0-21swapper/119:06:081
111391570,5ptp4l0-21swapper/619:05:586
111391570,5ptp4l0-21swapper/619:05:576
111391550,5ptp4l0-21swapper/219:06:022
111391550,5ptp4l0-21swapper/219:06:022
2752825343,6sleep70-21swapper/719:05:067
2752825343,6sleep70-21swapper/719:05:067
2920024736,7sleep30-21swapper/319:06:553
2920024736,7sleep30-21swapper/319:06:543
111391340,0ptp4l0-21swapper/423:39:554
111391340,0ptp4l0-21swapper/422:40:134
111391340,0ptp4l0-21swapper/421:20:174
111391340,0ptp4l0-21swapper/420:05:184
111391340,0ptp4l0-21swapper/400:30:224
111391340,0ptp4l0-21swapper/400:30:224
111391340,0ptp4l0-21swapper/023:20:160
111391330,0ptp4l0-21swapper/422:31:374
111391330,0ptp4l0-21swapper/000:04:090
111391320,0ptp4l20468-21diskmemload00:17:454
111391320,0ptp4l0-21swapper/421:39:454
111391320,0ptp4l0-21swapper/420:25:204
111391320,0ptp4l0-21swapper/122:19:181
111391320,0ptp4l0-21swapper/121:00:151
111391320,0ptp4l0-21swapper/100:05:581
111391320,0ptp4l0-21swapper/023:17:000
111391320,0ptp4l0-21swapper/022:17:120
111391310,3ptp4l0-21swapper/023:59:270
111391310,0ptp4l0-21swapper/500:15:005
111391310,0ptp4l0-21swapper/423:49:034
111391310,0ptp4l0-21swapper/400:36:374
111391310,0ptp4l0-21swapper/122:28:151
111391310,0ptp4l0-21swapper/000:25:210
111391310,0ptp4l0-21swapper/000:25:210
111391300,0ptp4l0-21swapper/423:41:024
111391300,0ptp4l0-21swapper/423:31:364
111391300,0ptp4l0-21swapper/423:15:344
111391300,0ptp4l0-21swapper/422:23:134
111391300,0ptp4l0-21swapper/421:32:424
111391300,0ptp4l0-21swapper/022:41:230
111391300,0ptp4l0-21swapper/022:13:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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