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2026-08-06 - 08:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Thu Aug 06, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38039492242172,23sleep20-21swapper/219:05:522
38042252238167,22sleep00-21swapper/019:09:530
38041882235170,20sleep10-21swapper/119:09:211
38039532224189,22sleep60-21swapper/619:05:576
38039322223163,18sleep50-21swapper/519:05:405
38040902219181,25sleep40-21swapper/419:07:554
38039902216182,22sleep70-21swapper/719:06:307
38039682211177,22sleep30-21swapper/319:06:093
380447299310,25cyclictest3893677-21sendmail21:40:007
380447299270,22cyclictest0-21swapper/722:20:137
3804472992621,4cyclictest3422186-21systemd-journal23:49:597
380447299260,25cyclictest3953143-21apt-get23:20:117
380447299260,22cyclictest0-21swapper/720:35:117
3804472992523,2cyclictest3911831-21apt-get22:10:127
3804472992520,4cyclictest0-21swapper/700:00:147
380447299250,3cyclictest3876386-21apt-get21:10:127
380447299250,0cyclictest0-21swapper/720:45:127
380447099250,25cyclictest0-21swapper/600:04:596
380447099250,24cyclictest3807448-21latency_hist19:15:016
380446699250,24cyclictest0-21swapper/520:50:125
380446699250,24cyclictest0-21swapper/520:45:195
380445799250,24cyclictest3943885-21awk23:05:003
380445799250,24cyclictest3837662-21idleruntime-cro20:05:003
380445799250,24cyclictest0-21swapper/320:50:113
380445299250,4cyclictest3881843-21dump-pmu-power21:20:011
3804472992422,1cyclictest0-21swapper/721:00:167
3804472992421,2cyclictest3996935-21munin-plugin-st00:34:597
380447299240,23cyclictest3895386-21ntpq21:40:187
3804470992421,3cyclictest0-21swapper/623:10:136
3804470992421,3cyclictest0-21swapper/622:30:126
3804470992421,2cyclictest3879329-21apt-get21:15:136
3804470992417,6cyclictest3905461-21apt-get22:00:046
380447099240,23cyclictest0-21swapper/622:50:006
380446699240,23cyclictest0-21swapper/522:30:125
380446699240,1cyclictest0-21swapper/521:40:015
380446199240,23cyclictest3822845-21idleruntime-cro19:39:594
380445799240,24cyclictest0-21swapper/321:40:013
380445799240,24cyclictest0-21swapper/320:45:183
380445799240,23cyclictest3952709-21perf23:20:013
380445599240,23cyclictest3902953-21apt-get21:55:142
380445599240,23cyclictest0-21swapper/219:40:022
3804450992420,3cyclictest3834621-21cron20:00:030
380445099240,23cyclictest0-21swapper/023:15:100
3804472992320,3cyclictest0-21swapper/720:00:037
380447299230,22cyclictest0-21swapper/721:05:147
380447299230,22cyclictest0-21swapper/721:00:017
380447299230,22cyclictest0-21swapper/719:35:177
380447299230,22cyclictest0-21swapper/719:20:027
380447299230,19cyclictest3845343-21ntpq20:15:207
380447299230,0cyclictest0-21swapper/722:30:127
380447299230,0cyclictest0-21swapper/700:10:107
3804470992321,2cyclictest3979681-21apt-get00:05:176
3804470992321,2cyclictest3820303-21apt-get19:35:116
3804470992321,2cyclictest0-21swapper/623:50:006
3804470992321,1cyclictest3985557-21apt-get00:15:126
3804470992320,3cyclictest0-21swapper/621:25:146
380447099230,23cyclictest3940924-21http23:00:016
380447099230,23cyclictest3893723-21appstreamcli21:40:026
380447099230,22cyclictest0-21swapper/622:10:176
380447099230,22cyclictest0-21swapper/621:35:126
380447099230,1cyclictest3897069-21apt-get21:45:126
380447099230,1cyclictest0-21swapper/600:10:116
3804466992323,0cyclictest0-21swapper/521:15:135
3804466992320,2cyclictest3813991-21grep19:25:015
380446699230,23cyclictest3943879-21perf23:05:005
380446699230,23cyclictest0-21swapper/523:20:015
380446699230,22cyclictest0-21swapper/521:30:125
380446699230,22cyclictest0-21swapper/521:30:125
380446699230,22cyclictest0-21swapper/521:25:145
380446699230,22cyclictest0-21swapper/520:35:115
380446699230,22cyclictest0-21swapper/520:15:135
380446699230,22cyclictest0-21swapper/500:35:125
3804461992323,0cyclictest0-21swapper/421:15:134
3804461992320,3cyclictest3902543-21idleruntime-cro21:55:004
380446199230,22cyclictest3950178-21apt-get23:15:114
380446199230,22cyclictest0-21swapper/421:35:184
380446199230,22cyclictest0-21swapper/419:45:124
380446199230,22cyclictest0-21swapper/400:25:114
3804457992322,1cyclictest3888178-21apt-get21:30:113
3804457992322,1cyclictest3888178-21apt-get21:30:113
380445799230,22cyclictest3855749-21apt-get20:35:133
380445799230,22cyclictest0-21swapper/322:30:113
380445799230,22cyclictest0-21swapper/322:05:113
380445799230,22cyclictest0-21swapper/321:20:153
380445799230,22cyclictest0-21swapper/320:30:123
380445799230,1cyclictest3917268-21cron22:20:013
380445799230,1cyclictest0-21swapper/321:00:003
3804455992321,1cyclictest3945606-21ntp_kernel_pll_23:05:162
3804455992321,1cyclictest3881860-21perf21:20:012
380445599230,23cyclictest0-21swapper/219:20:112
380445599230,22cyclictest0-21swapper/222:40:122
380445599230,22cyclictest0-21swapper/219:45:112
380445599230,1cyclictest3822905-21appstreamcli19:40:002
380445299230,2cyclictest3914342-21apt22:15:001
380445299230,23cyclictest3840601-21basename20:10:001
380445299230,23cyclictest3831706-21grep19:54:591
380445299230,23cyclictest0-21swapper/121:40:131
380445299230,22cyclictest0-21swapper/120:40:121
380445299230,1cyclictest3940868-21apt23:00:011
3804450992322,1cyclictest3842333-21ntpq20:10:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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