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2026-01-05 - 09:27

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 Mon Jan 05, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40435402245177,55sleep00-21swapper/019:07:440
40434892228173,17sleep50-21swapper/519:07:005
40435202221168,41sleep70-21swapper/719:07:277
40436342219162,19sleep20-21swapper/219:09:072
40434512215177,24sleep30-21swapper/319:06:263
40434852212166,15sleep10-21swapper/119:06:561
40434322209180,18sleep40-21swapper/419:06:114
40433952206177,18sleep60-21swapper/619:05:416
404392699270,22cyclictest0-21swapper/623:55:006
4043917992726,1cyclictest4056220-21sh19:30:004
404393099250,23cyclictest0-21swapper/719:25:167
4043926992520,4cyclictest0-21swapper/600:25:016
404392699250,25cyclictest3076-21latency_hist23:35:006
404392699250,21cyclictest4165053-21turbostat22:39:596
404392699250,0cyclictest4065225-21apt-get19:45:106
404392199250,4cyclictest0-21swapper/520:40:135
404391599254,21cyclictest0-21swapper/319:15:003
4043915992523,1cyclictest40763-21cron00:40:003
404391299250,0cyclictest0-21swapper/221:10:122
404391099250,22cyclictest4156519-21awk22:25:001
4043926992420,4cyclictest0-21swapper/622:45:136
404392199240,23cyclictest4056231-21munin-run19:30:005
4043912992423,1cyclictest0-21swapper/220:05:122
4043912992421,3cyclictest0-21swapper/220:20:142
404391299240,24cyclictest32116-21apt-key00:25:012
404391299240,24cyclictest0-21swapper/222:50:112
404391299240,23cyclictest0-21swapper/200:35:142
404391299240,0cyclictest0-21swapper/222:45:122
404391099240,23cyclictest4159333-21cron22:29:591
4043906992423,1cyclictest0-21swapper/023:25:140
404390699240,23cyclictest0-21swapper/022:55:100
4043926992321,1cyclictest4134063-21apt-get21:45:126
4043921992321,1cyclictest4122635-21apt-get21:25:125
404392199230,22cyclictest0-21swapper/521:59:595
404392199230,22cyclictest0-21swapper/521:15:125
404392199230,22cyclictest0-21swapper/519:20:015
4043917992322,1cyclictest4056652-21apt-get19:30:134
4043917992321,1cyclictest0-21swapper/422:35:144
4043917992321,1cyclictest0-21swapper/419:35:134
404391599230,22cyclictest4111212-21apt-get21:05:173
404391599230,22cyclictest3083-21turbostat23:35:003
404391599230,1cyclictest4087662-21munin-run20:25:003
4043912992320,3cyclictest0-21swapper/221:45:112
404391299230,22cyclictest0-21swapper/222:10:142
404391299230,0cyclictest0-21swapper/219:20:132
4043910992321,2cyclictest0-21swapper/121:50:131
4043910992319,3cyclictest0-21swapper/122:50:111
404391099230,22cyclictest4107835-21grep21:00:001
404391099230,22cyclictest0-21swapper/123:55:001
404391099230,22cyclictest0-21swapper/123:25:131
404391099230,1cyclictest0-21swapper/122:55:091
404391099230,0cyclictest0-21swapper/119:20:131
4043906992322,1cyclictest0-21swapper/021:00:010
404390699230,22cyclictest0-21swapper/020:30:130
4043930992221,1cyclictest4096662-21apt-get20:40:137
4043930992221,1cyclictest0-21swapper/723:35:007
404393099220,2cyclictest4142641-21apt-get22:00:137
404393099220,21cyclictest0-21swapper/722:10:147
404393099220,21cyclictest0-21swapper/721:45:127
404393099220,21cyclictest0-21swapper/721:35:137
404393099220,21cyclictest0-21swapper/721:00:137
404393099220,21cyclictest0-21swapper/720:15:167
404393099220,21cyclictest0-21swapper/719:30:127
404393099220,21cyclictest0-21swapper/700:10:117
404393099220,1cyclictest4061944-21perf19:40:017
404393099220,0cyclictest0-21swapper/722:20:127
4043926992221,1cyclictest4093788-21apt-get20:35:126
4043926992221,1cyclictest0-21swapper/619:20:016
4043926992220,2cyclictest0-21swapper/620:00:146
4043926992220,2cyclictest0-21swapper/620:00:136
4043926992220,1cyclictest78-21ksoftirqd/600:10:016
4043926992220,1cyclictest4107832-21awk21:00:006
4043926992219,2cyclictest4156501-21munin-run22:24:596
4043926992219,2cyclictest4139367-21awk21:55:006
4043926992217,4cyclictest26233-21perf00:15:006
404392699220,22cyclictest4070516-21perf19:55:006
404392699220,1cyclictest4059503-21apt-get19:35:146
404392699220,0cyclictest0-21swapper/623:05:016
4043921992220,1cyclictest4131212-21apt-get21:40:135
404392199220,21cyclictest0-21swapper/523:35:125
404392199220,21cyclictest0-21swapper/523:25:145
404392199220,21cyclictest0-21swapper/522:05:125
404392199220,21cyclictest0-21swapper/520:25:015
404392199220,21cyclictest0-21swapper/519:20:145
404392199220,1cyclictest6380-21apt-get23:40:135
404392199220,1cyclictest0-21swapper/521:05:005
4043917992221,1cyclictest0-21swapper/422:04:594
4043917992221,1cyclictest0-21swapper/400:20:124
4043917992220,1cyclictest0-21swapper/423:20:144
4043917992220,1cyclictest0-21swapper/421:15:134
404391799220,21cyclictest4085233-21apt-get20:20:144
404391799220,21cyclictest0-21swapper/423:35:124
404391799220,21cyclictest0-21swapper/422:15:114
404391799220,21cyclictest0-21swapper/421:00:004
404391799220,21cyclictest0-21swapper/400:35:154
404391799220,21cyclictest0-21swapper/400:05:124
404391799220,1cyclictest4088081-21apt-get20:25:134
404391799220,1cyclictest0-21swapper/421:35:124
4043915992222,0cyclictest0-21swapper/322:10:153
4043915992221,1cyclictest4191044-21turbostat23:25:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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