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2026-01-04 - 02:34

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 Sun Jan 04, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31446922249174,24sleep30-21swapper/319:09:113
31446442223164,20sleep20-21swapper/219:08:302
31445432218185,21sleep50-21swapper/519:07:035
31446582215160,18sleep70-21swapper/719:08:427
31444792214181,21sleep60-21swapper/619:06:086
31444552212181,20sleep00-21swapper/019:05:460
31445512211177,22sleep40-21swapper/419:07:104
31445012210176,21sleep10-21swapper/119:06:271
3144988992927,1cyclictest0-21swapper/521:00:015
3144984992823,5cyclictest0-21swapper/419:30:014
3144978992719,7cyclictest3226108-21cron21:30:002
3144969992721,5cyclictest363-21systemd-journal21:50:010
3144978992621,4cyclictest0-21swapper/223:55:002
314497899260,25cyclictest0-21swapper/223:35:102
314498999250,25cyclictest3162972-21cron19:40:006
314497899250,24cyclictest0-21swapper/220:05:142
314497899250,1cyclictest3273103-21apt-get22:50:132
314497899250,0cyclictest0-21swapper/223:40:132
314496999250,1cyclictest3226124-21turbostat21:30:000
3144994992421,2cyclictest3332714-21munin-run00:35:007
3144984992423,0cyclictest0-21swapper/419:10:124
3144984992420,3cyclictest3217276-21idleruntime-cro21:15:004
314498499240,2cyclictest363-21systemd-journal23:20:004
314498499240,24cyclictest0-21swapper/420:50:004
3144982992423,1cyclictest0-21swapper/323:55:003
314498299240,23cyclictest3151307-21perf19:20:003
3144978992420,4cyclictest0-21swapper/219:50:122
3144978992420,4cyclictest0-21swapper/219:35:002
314497899240,21cyclictest0-21swapper/220:10:132
314497899240,1cyclictest0-21swapper/220:40:152
3144969992419,4cyclictest0-21swapper/021:10:130
314499499230,22cyclictest0-21swapper/723:30:137
314499499230,22cyclictest0-21swapper/722:45:127
3144989992321,1cyclictest3278826-21apt-get23:00:146
314498999230,22cyclictest3313152-21http00:00:126
314498999230,22cyclictest0-21swapper/622:55:126
314498499230,22cyclictest0-21swapper/420:40:164
3144982992321,1cyclictest3180562-21apt-get20:10:133
314498299230,22cyclictest3194851-21apt-get20:35:173
314498299230,22cyclictest0-21swapper/320:20:003
3144978992321,1cyclictest3223004-21turbostat.cron21:25:002
314497899230,23cyclictest3147866-21sed19:15:012
314497899230,22cyclictest3327014-21awk00:25:002
314497899230,22cyclictest3200573-21apt-get20:45:132
3144974992321,1cyclictest3246867-21apt-get22:05:141
314497499230,22cyclictest0-21swapper/122:10:141
3144969992321,2cyclictest3333134-21apt-get00:35:130
3144969992321,1cyclictest3211999-21apt-get21:05:110
3144969992321,1cyclictest0-21swapper/021:00:120
3144969992320,2cyclictest0-21swapper/019:10:130
314496999230,1cyclictest3223003-21idleruntime-cro21:25:010
3144994992220,1cyclictest0-21swapper/700:05:127
314499499220,22cyclictest0-21swapper/722:30:147
314499499220,21cyclictest0-21swapper/722:35:137
314499499220,21cyclictest0-21swapper/720:40:157
3144989992220,1cyclictest3267137-21apt-get22:40:126
314498999220,21cyclictest0-21swapper/623:55:136
314498999220,21cyclictest0-21swapper/623:40:126
314498999220,21cyclictest0-21swapper/622:30:006
314498999220,21cyclictest0-21swapper/621:30:136
314498999220,21cyclictest0-21swapper/621:20:126
314498999220,21cyclictest0-21swapper/600:15:006
314498999220,1cyclictest3304539-21apt-get23:45:136
314498999220,1cyclictest3240739-21idleruntime-cro21:55:006
3144988992221,0cyclictest0-21swapper/523:45:135
314498899220,21cyclictest0-21swapper/523:20:135
314498899220,21cyclictest0-21swapper/522:10:135
314498899220,21cyclictest0-21swapper/521:05:115
314498899220,21cyclictest0-21swapper/520:05:145
314498899220,1cyclictest0-21swapper/522:34:595
314498899220,1cyclictest0-21swapper/522:29:595
314498499220,21cyclictest0-21swapper/423:10:134
314498499220,21cyclictest0-21swapper/421:00:134
314498499220,1cyclictest3313147-21apt-get00:00:134
314498499220,1cyclictest3191575-21munin-run20:30:004
314498499220,1cyclictest3191575-21munin-run20:30:004
314498499220,1cyclictest0-21swapper/421:55:014
314498499220,1cyclictest0-21swapper/420:55:004
3144982992222,0cyclictest0-21swapper/300:00:133
314498299220,21cyclictest0-21swapper/322:35:123
314498299220,21cyclictest0-21swapper/321:30:143
314498299220,21cyclictest0-21swapper/321:05:123
314498299220,21cyclictest0-21swapper/319:20:133
314498299220,0cyclictest0-21swapper/323:20:133
314498299220,0cyclictest0-21swapper/320:45:123
3144978992222,0cyclictest0-21swapper/223:05:122
3144978992221,1cyclictest0-21swapper/220:35:172
3144978992220,1cyclictest3324161-21plymouth00:20:002
3144978992218,3cyclictest0-21swapper/221:35:162
3144978992215,6cyclictest3237850-21cron21:50:002
314497899220,22cyclictest3289840-21sendmail23:20:012
314497899220,21cyclictest0-21swapper/221:30:132
314497899220,21cyclictest0-21swapper/220:55:132
314497899220,1cyclictest0-21swapper/219:15:132
3144974992222,0cyclictest0-21swapper/100:15:121
3144974992221,1cyclictest3260731-21awk22:29:591
3144974992221,0cyclictest0-21swapper/119:35:121
3144974992220,1cyclictest3315582-21munin-run00:05:001
3144974992220,1cyclictest3252569-21apt-get22:15:121
314497499220,21cyclictest0-21swapper/123:00:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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