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2026-08-27 - 06:33

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 Thu Aug 27, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40391992278231,15sleep70-21swapper/718:55:247
40390852262220,15sleep50-21swapper/518:53:495
40389972260215,35sleep10-21swapper/118:52:391
40389872259235,16sleep20-21swapper/218:52:322
40390312258210,17sleep60-21swapper/618:53:016
40390272258213,16sleep30-21swapper/318:52:573
40390482257217,31sleep40-21swapper/418:53:154
40391312241216,17sleep00-21swapper/018:54:270
4039570993430,2cyclictest0-21swapper/200:08:082
403957099294,23cyclictest528-21systemd-journal23:19:502
403957499270,1cyclictest0-21swapper/319:57:453
403957099271,22cyclictest0-21swapper/218:56:572
4039585992625,1cyclictest0-21swapper/520:17:565
403957499260,22cyclictest0-21swapper/322:30:063
403957099263,22cyclictest528-21systemd-journal23:02:482
4039561992625,1cyclictest0-21swapper/023:13:290
403956199260,26cyclictest0-21swapper/019:30:590
403956199260,24cyclictest0-21swapper/022:50:550
4039596992521,3cyclictest1390-21snmpd22:10:547
4039596992521,3cyclictest1390-21snmpd21:14:407
4039596992521,3cyclictest1390-21snmpd00:28:097
4039596992521,3cyclictest1390-21snmpd00:15:127
4039596992520,4cyclictest1390-21snmpd20:55:277
4039592992521,3cyclictest1390-21snmpd20:46:486
4039592992518,5cyclictest0-21swapper/623:36:346
403959299250,22cyclictest0-21swapper/623:02:146
4039578992521,3cyclictest1390-21snmpd21:39:234
4039578992521,3cyclictest1390-21snmpd20:50:214
4039578992518,3cyclictest0-21swapper/423:40:384
403957899250,23cyclictest0-21swapper/421:23:164
4039570992521,3cyclictest1390-21snmpd22:46:292
4039570992521,2cyclictest0-21swapper/219:17:532
4039570992519,4cyclictest16180-21/usr/sbin/munin00:14:102
4039570992518,5cyclictest528-21systemd-journal00:27:502
4039570992516,5cyclictest0-21swapper/219:47:092
403957099250,23cyclictest4193318-21ntpq23:42:592
403957099250,23cyclictest4181578-21diskstats23:22:032
403957099250,23cyclictest0-21swapper/220:37:262
403957099250,22cyclictest0-21swapper/219:56:342
4039565992521,3cyclictest1390-21snmpd18:58:331
403959699240,2cyclictest0-21swapper/722:28:117
4039592992421,3cyclictest1390-21snmpd00:09:396
403958599240,22cyclictest0-21swapper/521:53:255
403958599240,14cyclictest0-21swapper/500:12:455
4039578992422,1cyclictest1390-21snmpd20:27:124
4039578992421,2cyclictest1907017-21gnome-shell00:27:184
4039578992420,3cyclictest1390-21snmpd23:55:494
4039578992418,3cyclictest0-21swapper/421:06:564
403957899240,22cyclictest0-21swapper/420:17:094
4039574992421,3cyclictest1390-21snmpd20:02:173
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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