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2026-07-28 - 04:31

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 Tue Jul 28, 2026 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2834911130,59ptp4l0-21swapper/119:07:451
94080890,84rtkit-daemon0-21swapper/419:06:116
1380026856,9sleep110-21swapper/1119:05:283
1479326755,10sleep00-21swapper/019:08:290
1468026654,10sleep70-21swapper/719:06:489
1370326654,9sleep100-21swapper/1019:05:272
1160826654,10sleep60-21swapper/619:05:118
1469226352,9sleep50-21swapper/519:06:587
263492530,0sleep50-21swapper/500:15:177
319922500,0sleep90-21swapper/923:00:1311
153472480,0sleep70-21swapper/723:20:139
253832190,0sleep00-21swapper/020:45:140
283491170,0ptp4l0-21swapper/123:10:231
1529499173,9cyclictest0-21swapper/1121:30:013
1524999173,9cyclictest0-21swapper/121:05:001
283491150,1ptp4l21-21ksoftirqd/122:15:251
283491150,0ptp4l0-21swapper/122:25:231
283491150,0ptp4l0-21swapper/121:05:171
283491150,0ptp4l0-21swapper/100:20:131
277842150,0sleep100-21swapper/1022:55:132
1529499152,8cyclictest0-21swapper/1120:25:003
1529499152,2cyclictest0-21swapper/1121:40:163
1529499152,2cyclictest0-21swapper/1121:40:163
1528599153,8cyclictest0-21swapper/923:55:0111
1528599153,7cyclictest0-21swapper/923:15:0111
1528599153,7cyclictest0-21swapper/919:40:0011
1525899153,7cyclictest0-21swapper/321:15:005
283491140,1ptp4l21-21ksoftirqd/121:41:221
283491140,1ptp4l21-21ksoftirqd/121:41:221
283491140,1ptp4l21-21ksoftirqd/120:56:421
283491140,0ptp4l0-21swapper/123:05:151
283491140,0ptp4l0-21swapper/120:05:151
283491140,0ptp4l0-21swapper/119:40:191
1529499142,7cyclictest0-21swapper/1122:50:013
1529499142,7cyclictest0-21swapper/1100:15:013
1526799142,8cyclictest0-21swapper/523:50:017
15267991411,2cyclictest0-21swapper/519:15:477
323222130,0sleep100-21swapper/1021:35:172
323222130,0sleep100-21swapper/1021:35:172
283491130,1ptp4l21-21ksoftirqd/122:06:001
283491130,1ptp4l21-21ksoftirqd/100:15:221
283491130,0ptp4l0-21swapper/121:20:231
283491130,0ptp4l0-21swapper/120:11:511
1529499132,7cyclictest0-21swapper/1122:15:013
1528599133,6cyclictest0-21swapper/900:20:0111
1528599132,6cyclictest0-21swapper/922:40:0111
1527699132,10cyclictest15969-21kworker/u24:021:20:009
1526799132,7cyclictest0-21swapper/522:25:017
1526799132,6cyclictest0-21swapper/522:10:017
1526799132,6cyclictest0-21swapper/500:40:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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