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2026-04-23 - 20:48

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 Apr 23, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3834612283274,6sleep00-21swapper/019:08:490
3834612283274,6sleep00-21swapper/019:08:490
3832092266219,16sleep10-21swapper/119:06:001
3832092266219,16sleep10-21swapper/119:06:001
3834562265218,16sleep40-21swapper/419:08:464
3834562265218,16sleep40-21swapper/419:08:464
3834792262214,16sleep20-21swapper/219:09:002
3834792262214,16sleep20-21swapper/219:08:592
3832902247221,17sleep70-21swapper/719:06:477
3832902247221,17sleep70-21swapper/719:06:477
3831722245219,17sleep50-21swapper/519:05:415
3831722245219,17sleep50-21swapper/519:05:405
3832042244219,17sleep60-21swapper/619:05:586
3832042244219,17sleep60-21swapper/619:05:576
3831992244217,18sleep30-21swapper/319:05:553
3831992244217,18sleep30-21swapper/319:05:543
42532321030,0sleep00-21swapper/020:21:550
383824993533,1cyclictest0-21swapper/120:55:121
383846993332,1cyclictest1391-21snmpd00:05:216
383842993331,1cyclictest0-21swapper/520:55:115
383846993130,1cyclictest0-21swapper/620:30:216
383838993023,5cyclictest523-21systemd-journal20:47:304
38383899302,24cyclictest581ktimers/422:33:254
38383899294,23cyclictest581ktimers/400:30:454
38383899293,24cyclictest581ktimers/419:12:124
383838992922,5cyclictest523-21systemd-journal22:48:224
383838992922,5cyclictest523-21systemd-journal21:31:344
38383899284,22cyclictest581ktimers/423:55:134
38383899284,22cyclictest581ktimers/423:55:134
38383899283,22cyclictest581ktimers/422:09:164
38383899282,24cyclictest581ktimers/419:15:464
38383899281,25cyclictest581ktimers/419:31:234
38383899280,1cyclictest0-21swapper/420:04:584
383853992726,1cyclictest495921-21ntpq22:30:207
38383899274,22cyclictest581ktimers/420:25:254
38383899273,22cyclictest581ktimers/423:17:324
38383899273,22cyclictest581ktimers/421:54:194
38383899271,24cyclictest537100-21ntp_kernel_pll_23:45:204
38383899270,2cyclictest0-21swapper/423:21:084
38383899270,1cyclictest0-21swapper/400:11:124
38383399270,25cyclictest0-21swapper/320:03:013
383853992622,3cyclictest1391-21snmpd21:37:437
38383899263,22cyclictest523-21systemd-journal21:12:224
38383899262,23cyclictest0-21swapper/421:08:194
38383899262,22cyclictest581ktimers/423:43:074
38383899262,22cyclictest581ktimers/422:25:374
38383899262,22cyclictest581ktimers/421:18:464
38383899261,24cyclictest581ktimers/400:05:534
38383899261,22cyclictest581ktimers/423:53:134
38383899261,22cyclictest581ktimers/423:53:124
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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