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2025-10-28 - 07:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Tue Oct 28, 2025 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19043729910025,35cyclictest0-21swapper/1921:36:1611
21844162690,0sleep180-21swapper/1800:24:5710
1904343996926,42cyclictest0-21swapper/1020:46:562
301432520670,65data-loop.00-21swapper/1619:05:198
301432520660,63data-loop.00-21swapper/819:07:1418
301432520660,63data-loop.00-21swapper/1819:05:3510
301432520660,63data-loop.00-21swapper/1419:08:516
301433720650,62data-loop.00-21swapper/919:05:4219
301432520650,62data-loop.00-21swapper/1019:09:552
1904343996529,34cyclictest0-21swapper/1020:13:392
301433720640,61data-loop.00-21swapper/1919:07:1411
301432520640,62data-loop.00-21swapper/019:09:090
301432520630,61data-loop.00-21swapper/319:09:2713
1904313996324,5cyclictest1690023-21CPU1
301432520620,60data-loop.00-21swapper/1519:07:427
301432520610,59data-loop.00-21swapper/719:09:4417
301432520610,59data-loop.00-21swapper/619:09:4316
301432520610,59data-loop.00-21swapper/519:06:4615
301432520610,59data-loop.00-21swapper/119:06:221
301432520600,58data-loop.00-21swapper/1319:09:295
301432520600,56data-loop.00-21swapper/419:05:0314
301432520580,56data-loop.00-21swapper/1719:06:559
301432520580,56data-loop.00-21swapper/1219:09:584
301432520580,54data-loop.00-21swapper/1119:06:243
1904343995613,42cyclictest3013491-21Xorg23:36:042
1904343995426,27cyclictest0-21swapper/1019:21:182
1904343995126,24cyclictest1141rcuc/1000:19:212
1904343995111,6cyclictest0-21swapper/1022:23:412
301432520500,48data-loop.00-21swapper/219:06:2612
190434399505,43cyclictest1690024-21CPU2
1904343995023,1cyclictest0-21swapper/1022:11:022
1904343995019,29cyclictest1690024-21CPU2
19893162490,0sleep111251rcuc/1120:44:103
1904343994912,36cyclictest0-21swapper/1023:00:542
1904317994949,0cyclictest0-21swapper/223:53:5112
190431399499,1cyclictest1690023-21CPU1
1904365994810,27cyclictest1690024-21CPU9
190436399481,45cyclictest1690023-21CPU8
190435999489,39cyclictest0-21swapper/1520:46:577
1904317994811,37cyclictest0-21swapper/220:46:5712
190431799480,47cyclictest1690024-21CPU12
190437299470,0cyclictest0-21swapper/1900:17:2411
190436599478,28cyclictest2074767-40tracker-miner-f22:20:229
1904343994717,28cyclictest0-21swapper/1022:35:372
301432520460,40data-loop.03014302-10pipewire-pulse22:42:1519
301432520460,37data-loop.02378297-21thunderbird23:34:3119
190437299460,45cyclictest2078116-40tracker-miner-f22:23:4211
190437299460,0cyclictest0-21swapper/1923:59:2911
190435399460,1cyclictest2378297-21thunderbird19:37:195
1904347994610,2cyclictest0-21swapper/1120:46:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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