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2026-08-15 - 02:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Sat Aug 15, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14298672260211,18sleep20-21swapper/218:52:012
14297862259218,33sleep30-21swapper/318:50:533
14297882256213,34sleep50-21swapper/518:50:555
14297382255207,17sleep60-21swapper/618:50:146
14276662250227,8sleep10-21swapper/118:49:011
14298152245219,17sleep40-21swapper/418:51:194
14298622243217,17sleep70-21swapper/718:51:577
14297922241217,16sleep00-21swapper/018:50:580
1430329993331,1cyclictest1390-21snmpd22:01:336
1430303993231,1cyclictest0-21swapper/123:37:111
143030399300,1cyclictest0-21swapper/123:00:311
1430320992927,1cyclictest0-21swapper/422:12:094
1430315992924,3cyclictest0-21swapper/300:08:363
1430298992928,1cyclictest0-21swapper/022:48:490
1430320992821,5cyclictest528-21systemd-journal23:58:574
1430320992821,5cyclictest528-21systemd-journal23:21:434
143032099280,25cyclictest0-21swapper/400:38:104
1430315992825,2cyclictest1907017-21gnome-shell23:46:193
1430307992822,2cyclictest0-21swapper/222:16:492
1430320992720,5cyclictest528-21systemd-journal20:43:034
1430320992720,5cyclictest528-21systemd-journal19:28:334
1430320992720,5cyclictest0-21swapper/423:21:124
143029899270,25cyclictest0-21swapper/023:09:210
143029899270,25cyclictest0-21swapper/021:24:270
1430334992620,4cyclictest0-21swapper/719:51:597
1430325992622,3cyclictest1390-21snmpd22:47:495
143032599260,22cyclictest0-21swapper/523:02:055
143032099260,22cyclictest0-21swapper/422:31:134
143032099260,1cyclictest0-21swapper/421:48:464
143030399260,22cyclictest0-21swapper/121:47:311
143029899260,24cyclictest0-21swapper/020:44:510
1430334992521,3cyclictest1390-21snmpd19:45:067
1430329992524,1cyclictest0-21swapper/622:12:096
1430329992521,3cyclictest1390-21snmpd00:34:396
1430329992521,3cyclictest1390-21snmpd00:27:206
143032999250,1cyclictest0-21swapper/620:08:286
1430320992518,5cyclictest528-21systemd-journal20:00:364
143032099250,23cyclictest0-21swapper/423:31:474
143032099250,23cyclictest0-21swapper/423:31:474
143032099250,23cyclictest0-21swapper/422:37:484
143032099250,23cyclictest0-21swapper/420:46:034
143032099250,23cyclictest0-21swapper/419:48:064
143032099250,23cyclictest0-21swapper/419:24:594
143032099250,23cyclictest0-21swapper/400:11:144
143032099250,1cyclictest0-21swapper/421:01:434
1430307992521,3cyclictest1390-21snmpd21:04:052
1430303992524,1cyclictest0-21swapper/122:20:411
1430303992521,3cyclictest1390-21snmpd21:01:401
1430298992518,5cyclictest0-21swapper/019:40:170
1430334992420,3cyclictest1390-21snmpd19:04:457
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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