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2026-06-24 - 22:47

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 Wed Jun 24, 2026 12:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31959732263182,24sleep50-21swapper/507:07:175
31961102237165,22sleep00-21swapper/007:09:130
31936412237199,25sleep40-21swapper/407:05:074
31959782232166,53sleep10-21swapper/107:07:211
31960692223186,24sleep60-21swapper/607:08:396
31960852222189,22sleep20-21swapper/207:08:512
31959012221182,25sleep70-21swapper/707:06:167
31959622214179,23sleep30-21swapper/307:07:073
3196384992625,1cyclictest0-21swapper/609:10:176
319638499260,24cyclictest3199216-21grep07:15:016
319637399260,25cyclictest3306681-21apt-get10:15:112
3196384992524,1cyclictest0-21swapper/609:15:126
319638499252,22cyclictest0-21swapper/610:40:006
319638499250,24cyclictest3256070-21idleruntime-cro08:50:016
3196379992522,3cyclictest3299133-21ntpq10:00:174
3196379992520,4cyclictest3291524-21turbostat09:50:004
3196375992521,4cyclictest0-21swapper/312:30:003
319637599250,25cyclictest0-21swapper/309:10:113
319637599250,21cyclictest0-21swapper/311:15:133
319637599250,21cyclictest0-21swapper/310:55:113
3196373992521,3cyclictest3247239-21munin-plugin-st08:35:012
319637099250,1cyclictest3335784-21munin-run11:05:011
319637099250,1cyclictest3335784-21munin-run11:05:001
319638599240,24cyclictest0-21swapper/710:15:117
319638499241,22cyclictest3260777-21awk08:55:176
319638499240,3cyclictest81-21ksoftirqd/612:35:166
319638499240,23cyclictest3371156-21munin-run12:05:006
319638499240,23cyclictest3315108-21munin-run10:30:006
319638199240,1cyclictest3368187-21turbostat.cron12:00:005
319638199240,1cyclictest0-21swapper/511:25:115
319637999240,23cyclictest3308056-21ntp_states10:15:184
3196375992421,3cyclictest0-21swapper/311:10:123
3196375992420,3cyclictest3327358-21apt-get10:50:123
319637599240,23cyclictest3312589-21apt-get10:25:113
319637599240,21cyclictest0-21swapper/311:40:113
319637399240,23cyclictest3330304-21apt-get10:55:102
319637399240,23cyclictest0-21swapper/211:50:102
319637399240,23cyclictest0-21swapper/209:05:032
319637399240,0cyclictest0-21swapper/207:15:032
319637099240,24cyclictest3390544-21ntpq12:35:161
319637099240,1cyclictest3224071-21apt-get07:55:091
319636899240,24cyclictest3324415-21apt-get10:45:110
319638599230,23cyclictest0-21swapper/712:25:007
319638599230,22cyclictest789-21dbus-daemon10:00:007
319638599230,22cyclictest3368639-21apt-get12:00:127
319638599230,22cyclictest3206373-21apt-get07:25:117
319638599230,22cyclictest0-21swapper/709:35:147
319638599230,1cyclictest0-21swapper/707:55:157
3196384992322,1cyclictest0-21swapper/608:00:126
319638499230,2cyclictest3262405-21apt-get09:00:106
319638499230,22cyclictest3353471-21awk11:35:006
319638499230,22cyclictest3288556-21awk09:45:006
319638499230,22cyclictest3247243-21perf08:35:016
319638499230,22cyclictest0-21swapper/612:10:116
319638499230,22cyclictest0-21swapper/611:40:126
319638499230,22cyclictest0-21swapper/611:15:136
319638499230,22cyclictest0-21swapper/610:55:106
319638499230,22cyclictest0-21swapper/610:45:116
319638499230,22cyclictest0-21swapper/609:25:166
319638199230,23cyclictest3319858-21ntp_states10:35:195
319638199230,22cyclictest0-21swapper/511:10:125
3196379992322,1cyclictest0-21swapper/411:55:124
3196379992319,3cyclictest3279683-21cron09:30:004
319637999230,23cyclictest0-21swapper/410:35:004
319637999230,22cyclictest0-21swapper/407:25:114
319637999230,1cyclictest0-21swapper/408:50:114
3196375992323,0cyclictest0-21swapper/310:45:113
3196375992322,1cyclictest3362727-21apt-get11:50:103
3196375992320,2cyclictest3347571-21ls11:25:003
3196375992319,4cyclictest0-21swapper/307:35:003
319637599230,22cyclictest3288546-21apt-get09:45:043
319637599230,22cyclictest0-21swapper/307:55:093
319637599230,22cyclictest0-21swapper/307:20:023
319637599230,1cyclictest3278548-21ntpq09:25:173
319637599230,0cyclictest0-21swapper/309:15:123
3196373992322,1cyclictest3278454-21ntpq09:25:152
319637399230,22cyclictest3271268-21apt-get09:15:122
319637399230,22cyclictest0-21swapper/209:45:122
3196370992322,1cyclictest3355254-21ntp_states11:35:211
3196370992310,13cyclictest0-21swapper/110:10:171
319637099230,22cyclictest3347994-21apt-get11:25:111
319637099230,22cyclictest3257778-21ntpq08:50:171
319637099230,22cyclictest0-21swapper/109:35:151
319637099230,22cyclictest0-21swapper/109:30:121
319637099230,22cyclictest0-21swapper/109:25:101
3196368992321,1cyclictest3332827-21munin-run11:00:000
319636899230,23cyclictest3219509-21ntpq07:45:170
319636899230,22cyclictest0-21swapper/011:05:120
319636899230,22cyclictest0-21swapper/011:05:120
319636899230,22cyclictest0-21swapper/007:20:120
319636899230,1cyclictest3381810-21ntpq12:20:180
3196385992222,0cyclictest0-21swapper/709:40:127
3196385992221,1cyclictest0-21swapper/707:15:027
3196385992220,1cyclictest0-21swapper/712:05:137
319638599220,21cyclictest0-21swapper/710:10:117
319638599220,21cyclictest0-21swapper/709:20:137
319638599220,21cyclictest0-21swapper/709:15:127
319638599220,21cyclictest0-21swapper/709:10:117
319638599220,21cyclictest0-21swapper/708:30:117
319638599220,21cyclictest0-21swapper/708:15:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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