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2026-04-13 - 06:11

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 Apr 13, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29095082246174,57sleep30-21swapper/319:07:033
29095442237174,21sleep10-21swapper/119:07:331
29094572215177,25sleep00-21swapper/019:06:200
29095492212182,19sleep60-21swapper/619:07:386
29095932211173,25sleep50-21swapper/519:08:185
29094032208159,39sleep20-21swapper/219:05:322
29095412206176,19sleep70-21swapper/719:07:317
29094502206173,22sleep40-21swapper/419:06:164
290996499302,2cyclictest2976554-21awk21:04:594
290997399286,4cyclictest0-21swapper/719:44:037
290997399275,4cyclictest0-21swapper/723:45:417
290997399265,4cyclictest0-21swapper/700:07:397
290996899260,1cyclictest3008008-21sendmail-msp22:00:015
2909968992521,3cyclictest3028653-21apt-get22:35:115
290996899250,24cyclictest0-21swapper/520:20:135
2909970992421,2cyclictest2916272-21turbostat19:19:596
290997099240,23cyclictest2968118-21apt-get20:50:146
290997099240,23cyclictest0-21swapper/621:00:016
290997099240,23cyclictest0-21swapper/621:00:006
290997099240,1cyclictest3080217-21apt00:05:006
2909968992418,5cyclictest3065377-21munin-run23:40:005
290996899240,0cyclictest0-21swapper/519:30:115
2909964992420,3cyclictest2979404-21idleruntime-cro21:10:014
2909964992420,3cyclictest2979404-21idleruntime-cro21:10:014
290996499240,22cyclictest3031527-21apt-get22:40:124
290995799240,23cyclictest0-21swapper/119:10:121
2909973992323,0cyclictest0-21swapper/723:10:127
290997399230,22cyclictest2956270-21munin-run20:30:007
290997399230,22cyclictest0-21swapper/723:35:007
2909970992321,1cyclictest3059658-21apt23:30:006
290997099230,22cyclictest0-21swapper/620:30:146
290997099230,22cyclictest0-21swapper/620:20:006
290997099230,22cyclictest0-21swapper/600:00:006
2909968992321,2cyclictest0-21swapper/500:10:175
2909968992321,1cyclictest2996964-21apt-get21:40:125
2909968992320,2cyclictest0-21swapper/500:05:015
290996899230,2cyclictest3097627-21perf00:35:005
290996899230,23cyclictest3022274-21perf22:25:015
290996899230,22cyclictest0-21swapper/521:20:005
290996899230,0cyclictest0-21swapper/519:40:115
2909964992321,1cyclictest0-21swapper/420:30:134
290996499230,22cyclictest0-21swapper/422:15:114
290996499230,22cyclictest0-21swapper/419:35:124
290996499230,1cyclictest3091920-21munin-run00:24:594
2909962992321,1cyclictest3056830-21idleruntime-cro23:25:003
290996299230,22cyclictest0-21swapper/322:35:123
2909959992321,1cyclictest2922399-21apt-get19:30:102
2909959992320,2cyclictest2973390-21sh21:00:002
2909959992320,2cyclictest2973390-21sh21:00:002
290995999230,23cyclictest3007957-21idleruntime-cro22:00:002
290995999230,22cyclictest0-21swapper/222:45:112
290995999230,22cyclictest0-21swapper/219:50:142
290995999230,1cyclictest0-21swapper/222:05:122
290995999230,0cyclictest0-21swapper/221:50:012
290995799230,22cyclictest3083758-21apt-get00:10:121
290995799230,22cyclictest0-21swapper/119:45:141
290995799230,1cyclictest2985533-21apt-get21:20:131
290995799230,1cyclictest0-21swapper/100:25:001
2909952992321,1cyclictest3040080-21apt-get22:55:110
290995299230,23cyclictest0-21swapper/019:55:120
290995299230,22cyclictest0-21swapper/020:10:130
290997399225,0cyclictest0-21swapper/723:01:467
2909973992222,0cyclictest0-21swapper/722:40:137
2909973992220,1cyclictest2922399-21apt-get19:30:127
290997399220,21cyclictest0-21swapper/722:15:117
290997399220,21cyclictest0-21swapper/722:10:127
290997399220,21cyclictest0-21swapper/721:55:127
290997399220,21cyclictest0-21swapper/720:00:127
2909970992220,1cyclictest0-21swapper/621:40:116
2909970992220,1cyclictest0-21swapper/621:05:136
2909970992220,1cyclictest0-21swapper/621:05:136
290997099220,21cyclictest2950985-21apt-get20:20:136
290997099220,21cyclictest0-21swapper/621:20:196
290997099220,21cyclictest0-21swapper/620:35:126
2909968992222,0cyclictest0-21swapper/523:10:125
2909968992222,0cyclictest0-21swapper/520:35:125
2909968992217,4cyclictest0-21swapper/520:19:595
290996899220,22cyclictest0-21swapper/523:40:015
290996899220,21cyclictest3051511-21apt-get23:15:155
290996899220,21cyclictest3013684-21dump-pmu-power22:10:015
290996899220,21cyclictest0-21swapper/521:35:135
290996899220,1cyclictest3089488-21apt-get00:20:145
2909964992220,1cyclictest3007970-21munin-run22:00:014
2909964992220,1cyclictest2996525-21sendmail21:40:014
2909964992220,1cyclictest0-21swapper/420:50:144
290996499220,21cyclictest0-21swapper/423:45:124
290996499220,21cyclictest0-21swapper/422:45:124
290996499220,21cyclictest0-21swapper/420:35:134
290996499220,21cyclictest0-21swapper/420:00:134
290996499220,21cyclictest0-21swapper/419:55:124
290996499220,21cyclictest0-21swapper/400:05:124
290996499220,1cyclictest3022270-21awk22:25:014
290996499220,1cyclictest0-21swapper/419:20:004
2909962992221,1cyclictest0-21swapper/319:40:003
2909962992219,2cyclictest3053934-21apt23:20:003
290996299220,22cyclictest2996561-21basename21:40:013
290996299220,22cyclictest2987962-21turbostat21:25:003
290996299220,22cyclictest0-21swapper/319:45:003
290996299220,22cyclictest0-21swapper/300:24:593
290996299220,21cyclictest0-21swapper/323:10:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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