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2026-05-13 - 00:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Tue May 12, 2026 00:46:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21260602413406,4sleep130-21swapper/1319:08:555
21260672409388,14sleep30-21swapper/319:09:019
21258262366348,12sleep100-21swapper/1019:06:112
21261222363343,13sleep150-21swapper/1519:09:457
21260642361326,12sleep00-21swapper/019:08:580
21250692360352,5sleep140-21swapper/1419:05:276
21259712358339,12sleep90-21swapper/919:07:4615
21226202353332,13sleep60-21swapper/619:05:0212
21257552352342,6sleep20-21swapper/219:05:318
21224962350330,13sleep50-21swapper/519:05:0111
21257882348327,14sleep80-21swapper/819:05:5314
21261142347328,12sleep70-21swapper/719:09:3713
21258932346327,12sleep10-21swapper/119:06:501
21260682345326,13sleep40-21swapper/419:09:0210
21261372344325,12sleep110-21swapper/1119:09:573
21261192343322,14sleep120-21swapper/1219:09:424
212659399457,25cyclictest0-21swapper/1400:10:216
2126569994239,3cyclictest2412404-21kworker/u32:3+events_unbound00:35:1513
212659399413,25cyclictest0-21swapper/1421:25:366
212659399413,25cyclictest0-21swapper/1421:25:366
2126588994040,0cyclictest0-21swapper/1322:45:065
2126585994039,1cyclictest2405889-21kworker/u32:2+flush-259:023:30:194
212659399360,25cyclictest0-21swapper/1423:15:266
212659399360,11cyclictest0-21swapper/1423:37:246
2126554993626,10cyclictest1774-21snmpd23:38:178
2126593993535,0cyclictest0-21swapper/1421:19:206
2126593993535,0cyclictest0-21swapper/1421:19:206
212659399350,10cyclictest0-21swapper/1423:59:226
212659399350,10cyclictest0-21swapper/1422:31:306
212659399350,10cyclictest0-21swapper/1419:46:456
212659399350,10cyclictest0-21swapper/1419:13:486
212659599340,33cyclictest0-21swapper/1500:32:497
212659599340,33cyclictest0-21swapper/1500:32:497
212659399340,9cyclictest0-21swapper/1422:20:316
2126585993433,1cyclictest0-21swapper/1220:50:184
2126567993431,2cyclictest2314605-21kworker/u32:4+flush-259:022:25:1812
212658599330,30cyclictest0-21swapper/1200:00:144
2126569993333,0cyclictest0-21swapper/722:58:1713
2126554993324,9cyclictest1774-21snmpd21:44:028
2126593993232,0cyclictest0-21swapper/1422:50:426
2126593993232,0cyclictest0-21swapper/1400:33:066
2126593993232,0cyclictest0-21swapper/1400:33:066
2126569993232,0cyclictest0-21swapper/722:18:2613
2126569993232,0cyclictest0-21swapper/721:57:0613
212656799320,29cyclictest0-21swapper/623:10:1612
212655799322,30cyclictest0-21swapper/319:50:159
212655499320,31cyclictest0-21swapper/220:59:268
212655499320,30cyclictest0-21swapper/222:33:578
212655299320,29cyclictest0-21swapper/119:15:141
212659599310,30cyclictest0-21swapper/1521:30:467
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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