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2026-07-21 - 16:12

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 Tue Jul 21, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40174952275266,6sleep00-21swapper/018:39:140
40177662269231,29sleep30-21swapper/318:42:463
40176402264219,37sleep20-21swapper/218:41:092
40175382254213,31sleep40-21swapper/418:39:434
40175272244219,17sleep60-21swapper/618:39:376
40176302243218,17sleep10-21swapper/118:41:001
40174612242217,17sleep70-21swapper/718:38:557
40174892239213,18sleep50-21swapper/518:39:105
4018078993433,1cyclictest0-21swapper/320:07:073
4018092993326,3cyclictest0-21swapper/518:48:555
401807899330,1cyclictest1384-21arpwatch21:36:183
4018070993331,1cyclictest1390-21snmpd19:54:271
4018070993331,1cyclictest1390-21snmpd19:54:271
401807599290,25cyclictest0-21swapper/221:42:482
4018101992827,1cyclictest0-21swapper/721:36:197
4018070992826,1cyclictest0-21swapper/122:42:031
401807099280,24cyclictest0-21swapper/123:27:311
401807099270,25cyclictest0-21swapper/120:49:221
401807099270,1cyclictest0-21swapper/118:47:121
401806699270,25cyclictest0-21swapper/000:32:020
401810199260,22cyclictest0-21swapper/723:01:417
401809299260,22cyclictest0-21swapper/520:09:495
401807599260,24cyclictest0-21swapper/200:18:192
401807599260,22cyclictest0-21swapper/220:19:392
401807099260,25cyclictest4143211-21cstates22:46:281
401807099260,22cyclictest0-21swapper/119:34:481
401806699267,5cyclictest0-21swapper/000:34:300
4018101992524,1cyclictest0-21swapper/720:07:067
4018097992521,3cyclictest1390-21snmpd23:48:286
4018097992518,3cyclictest0-21swapper/621:23:396
401809799250,23cyclictest0-21swapper/619:40:446
401809799250,1cyclictest0-21swapper/620:53:046
4018092992521,3cyclictest1390-21snmpd00:35:335
4018092992521,3cyclictest1225-21ntpd00:14:185
4018087992521,3cyclictest1390-21snmpd23:10:424
4018087992521,3cyclictest1390-21snmpd22:27:124
4018087992521,3cyclictest1390-21snmpd22:17:104
4018087992521,3cyclictest1390-21snmpd21:04:454
4018087992521,3cyclictest1390-21snmpd00:00:034
4018087992518,5cyclictest0-21swapper/420:42:334
401807899259,15cyclictest0-21swapper/318:59:423
4018078992521,3cyclictest1390-21snmpd22:03:583
4018078992521,3cyclictest1390-21snmpd19:14:413
4018075992521,3cyclictest1390-21snmpd23:34:322
401807599250,23cyclictest4188323-21ntpq00:12:572
401807599250,1cyclictest0-21swapper/223:01:052
401807599250,1cyclictest0-21swapper/222:38:102
401807599250,1cyclictest0-21swapper/222:38:102
4018070992524,1cyclictest0-21swapper/100:18:441
4018070992523,1cyclictest0-21swapper/123:08:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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