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2026-09-17 - 13:00

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 Sep 17, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33687702270219,18sleep40-21swapper/418:56:164
33689452263216,39sleep30-21swapper/318:58:383
33687922259218,32sleep20-21swapper/218:56:322
33689222257214,33sleep70-21swapper/718:58:257
33688372256209,37sleep10-21swapper/118:57:111
33689032249224,16sleep60-21swapper/618:58:066
33687662248220,19sleep00-21swapper/018:56:120
33688742245219,17sleep50-21swapper/518:57:415
3369347993428,4cyclictest0-21swapper/520:12:055
336933099340,33cyclictest0-21swapper/220:12:052
3369334993029,1cyclictest0-21swapper/322:46:423
3369356992827,1cyclictest0-21swapper/722:46:427
336934799270,25cyclictest0-21swapper/521:44:235
336933099271,2cyclictest1907017-21gnome-shell22:32:002
336932599270,25cyclictest0-21swapper/123:14:111
3369356992622,3cyclictest1390-21snmpd21:06:367
336935299260,24cyclictest0-21swapper/620:25:236
336935299260,22cyclictest0-21swapper/621:24:276
336934799260,22cyclictest0-21swapper/523:20:165
336933099260,1cyclictest1907017-21gnome-shell19:58:232
336933099260,1cyclictest0-21swapper/222:51:532
336932599260,24cyclictest0-21swapper/121:57:461
336932299260,22cyclictest0-21swapper/022:46:430
3369356992521,3cyclictest3473162-21cat22:10:437
3369352992521,3cyclictest1390-21snmpd20:54:106
3369352992510,14cyclictest3519935-21cat23:38:166
3369347992524,1cyclictest0-21swapper/522:32:005
3369347992521,3cyclictest1390-21snmpd22:40:395
3369334992521,3cyclictest1390-21snmpd23:59:223
3369334992521,3cyclictest1390-21snmpd19:57:573
3369334992521,3cyclictest1390-21snmpd19:55:163
3369330992524,1cyclictest0-21swapper/220:39:382
3369330992518,5cyclictest0-21swapper/219:18:552
336933099250,25cyclictest0-21swapper/222:02:242
336933099250,1cyclictest0-21swapper/223:53:292
336933099250,1cyclictest0-21swapper/223:53:292
3369325992521,3cyclictest1390-21snmpd00:15:361
3369325992521,3cyclictest1390-21snmpd00:12:461
336932599250,22cyclictest0-21swapper/120:24:021
336932599250,22cyclictest0-21swapper/119:19:381
336932599250,22cyclictest0-21swapper/100:39:041
336932299250,1cyclictest0-21swapper/021:36:200
3369356992422,1cyclictest1390-21snmpd19:05:187
3369352992421,2cyclictest1390-21snmpd21:36:026
3369352992420,3cyclictest1390-21snmpd22:02:146
3369352992420,3cyclictest1390-21snmpd19:00:396
3369347992421,2cyclictest2622271-21kworker/5:0+events22:43:515
3369347992421,2cyclictest2622271-21kworker/5:0+events21:05:385
3369347992421,2cyclictest2622271-21kworker/5:0+events20:51:335
3369347992421,2cyclictest2622271-21kworker/5:0+events20:19:285
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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