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2026-05-29 - 18:18

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 Fri May 29, 2026 12:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6181612274192,24sleep50-21swapper/507:09:505
6181612274192,24sleep50-21swapper/507:09:505
6178852229192,25sleep10-21swapper/107:05:511
6178852229192,25sleep10-21swapper/107:05:511
6179782227166,19sleep00-21swapper/007:07:120
6179782227166,19sleep00-21swapper/007:07:120
6181672225186,26sleep20-21swapper/207:09:552
6181672225186,26sleep20-21swapper/207:09:552
6180502225187,25sleep70-21swapper/707:08:167
6180502225187,25sleep70-21swapper/707:08:167
6179732225174,19sleep40-21swapper/407:07:074
6179732225174,19sleep40-21swapper/407:07:074
6180672224187,24sleep60-21swapper/607:08:306
6180672224187,24sleep60-21swapper/607:08:306
6179522219190,19sleep30-21swapper/307:06:503
6179522219190,19sleep30-21swapper/307:06:503
61839599260,24cyclictest648037-21munin-plugin-st08:25:004
61838499260,25cyclictest628295-21ntpq07:30:180
618404992523,1cyclictest0-21swapper/609:25:126
61840099250,24cyclictest637609-21sh08:00:005
61839599250,24cyclictest621413-21latency_hist07:15:004
61839599250,24cyclictest621413-21latency_hist07:15:004
61839199250,4cyclictest661784-21taskset08:55:123
61839199250,24cyclictest0-21swapper/307:20:143
61838999250,24cyclictest0-21swapper/208:35:112
61838999250,1cyclictest657193-21ntpq08:45:142
61838699250,24cyclictest741151-21latency_hist11:10:001
61838499250,4cyclictest643517-21turbostat08:10:000
618406992423,1cyclictest762538-21ntpq11:40:177
618406992423,1cyclictest759614-21sh11:35:187
618406992423,1cyclictest676085-21grep09:20:007
618404992423,1cyclictest0-21swapper/611:15:116
61840499240,1cyclictest650972-21cron08:30:016
61840099240,23cyclictest775962-21apt-get12:05:125
61840099240,23cyclictest682024-21ls09:30:005
618395992417,7cyclictest0-21swapper/411:12:184
618395992417,7cyclictest0-21swapper/411:12:184
618391992423,1cyclictest0-21swapper/311:12:183
618391992423,1cyclictest0-21swapper/311:12:183
618391992422,1cyclictest0-21swapper/312:39:343
61839199240,23cyclictest0-21swapper/309:25:113
618386992420,4cyclictest664320-21awk09:00:001
61838699240,24cyclictest795331-21grep12:35:171
61838499240,23cyclictest784844-21apt-get12:20:110
61840699230,22cyclictest685397-21apt-get09:35:117
61840699230,22cyclictest634343-21apt-get07:50:087
61840699230,0cyclictest790820-21apt-get12:30:147
618404992321,1cyclictest717551-21cron10:30:006
618404992321,1cyclictest633165-21munin-run07:45:006
618404992321,1cyclictest0-21swapper/612:25:006
618404992321,1cyclictest0-21swapper/612:00:126
618404992321,1cyclictest0-21swapper/610:20:006
61840499230,22cyclictest0-21swapper/612:35:186
61840499230,22cyclictest0-21swapper/612:34:546
61840499230,22cyclictest0-21swapper/607:20:196
61840499230,1cyclictest684968-21turbostat09:35:006
61840499230,1cyclictest0-21swapper/608:05:116
618400992321,1cyclictest778902-21apt-get12:10:105
618400992321,1cyclictest676093-21perf09:20:005
61840099230,22cyclictest0-21swapper/511:40:025
61840099230,22cyclictest0-21swapper/511:10:105
61840099230,22cyclictest0-21swapper/511:10:105
618395992322,1cyclictest673562-21apt-get09:15:114
618395992322,1cyclictest0-21swapper/409:45:004
618395992321,1cyclictest0-21swapper/407:50:004
61839599230,22cyclictest1-21systemd12:39:344
61839599230,22cyclictest0-21swapper/412:20:114
61839599230,22cyclictest0-21swapper/412:05:104
618391992323,0cyclictest0-21swapper/309:45:163
618391992322,1cyclictest664742-21apt-get09:00:113
618391992321,1cyclictest0-21swapper/310:55:123
61839199230,22cyclictest0-21swapper/311:45:113
61839199230,22cyclictest0-21swapper/311:40:173
61839199230,22cyclictest0-21swapper/308:50:113
61839199230,22cyclictest0-21swapper/308:25:123
618389992321,2cyclictest743933-21systemctl11:12:182
618389992321,2cyclictest743933-21systemctl11:12:172
61838999230,23cyclictest651001-21idleruntime-cro08:30:002
61838999230,22cyclictest660112-21ntpq08:50:172
61838999230,22cyclictest0-21swapper/212:05:002
61838999230,22cyclictest0-21swapper/211:35:122
61838999230,22cyclictest0-21swapper/210:00:102
618386992323,0cyclictest0-21swapper/111:12:181
618386992323,0cyclictest0-21swapper/111:12:181
618386992322,1cyclictest0-21swapper/111:45:121
618386992322,1cyclictest0-21swapper/110:30:181
618386992322,1cyclictest0-21swapper/108:00:001
61838699230,23cyclictest0-21swapper/109:20:121
61838699230,23cyclictest0-21swapper/107:30:121
61838699230,22cyclictest0-21swapper/108:20:031
61838699230,1cyclictest653501-21ntpq08:35:171
61838699230,1cyclictest630205-21munin-run07:40:011
61838499230,22cyclictest0-21swapper/010:35:130
61838499230,22cyclictest0-21swapper/010:30:100
61838499230,22cyclictest0-21swapper/009:45:150
61838499230,22cyclictest0-21swapper/008:50:120
61838499230,1cyclictest0-21swapper/010:50:110
618406992222,0cyclictest0-21swapper/708:15:177
618406992221,1cyclictest711650-21cron10:20:007
618406992221,1cyclictest676564-21apt-get09:20:117
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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