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2026-01-08 - 02:46

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 Thu Jan 08, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25429202223184,26sleep50-21swapper/519:05:375
25431512222162,21sleep30-21swapper/319:08:573
25429892216172,32sleep00-21swapper/019:06:360
25431252215174,26sleep60-21swapper/619:08:356
25431032214177,24sleep20-21swapper/219:08:162
25430992212179,21sleep70-21swapper/719:08:127
25429482209176,21sleep40-21swapper/419:06:004
25431022206179,17sleep10-21swapper/119:08:141
2543479993225,3cyclictest0-21swapper/500:05:005
254347899270,26cyclictest2549767-21idleruntime-cro19:20:004
2543468992725,1cyclictest0-21swapper/119:20:001
254348699264,4cyclictest0-21swapper/720:57:537
2543479992622,3cyclictest2698075-21apt-get23:35:125
254348699253,4cyclictest0-21swapper/719:41:007
2543486992523,1cyclictest2576187-21apt-get20:05:117
2543479992519,5cyclictest0-21swapper/523:55:005
254347999250,24cyclictest0-21swapper/523:00:135
2543465992522,3cyclictest2572920-21awk20:00:000
254348699243,4cyclictest0-21swapper/722:03:477
254348499240,23cyclictest2703382-21awk23:45:016
254348499240,1cyclictest0-21swapper/619:45:016
2543479992420,3cyclictest0-21swapper/522:00:115
2543479992418,5cyclictest2665995-21sendmail-msp22:39:595
254347999240,23cyclictest2607883-21apt-get21:00:145
254347999240,21cyclictest0-21swapper/520:45:125
254347999240,20cyclictest0-21swapper/520:40:015
254347899240,23cyclictest0-21swapper/422:00:124
254347899240,0cyclictest0-21swapper/423:40:124
2543475992422,1cyclictest0-21swapper/319:45:003
254347599240,24cyclictest0-21swapper/322:39:593
2543468992418,5cyclictest0-21swapper/120:30:121
2543468992418,5cyclictest0-21swapper/120:30:121
2543486992323,0cyclictest0-21swapper/722:45:127
2543484992320,2cyclictest2671669-21apt-get22:49:596
254348499230,22cyclictest2581471-21munin-run20:15:006
254348499230,22cyclictest0-21swapper/619:35:126
254348499230,1cyclictest0-21swapper/621:05:006
2543479992320,2cyclictest2590471-21apt-get20:30:135
2543479992320,2cyclictest2590471-21apt-get20:30:125
2543479992319,4cyclictest0-21swapper/523:40:195
2543479992319,3cyclictest2555485-21sh19:30:005
254347999230,21cyclictest2579039-21apt-get20:10:125
2543478992320,2cyclictest2564355-21basename19:45:004
2543475992321,1cyclictest2610322-21turbostat21:05:003
254347599230,22cyclictest0-21swapper/321:40:113
2543473992323,0cyclictest0-21swapper/200:35:112
2543473992320,2cyclictest2662836-21ls22:35:002
2543473992320,2cyclictest2654268-21run-parts22:20:002
2543468992321,1cyclictest2706651-21apt-get23:50:111
2543468992321,1cyclictest0-21swapper/121:30:001
254346899230,22cyclictest0-21swapper/121:55:121
254346899230,1cyclictest2627993-21sleep21:35:001
254346899230,1cyclictest2581494-21basename20:15:001
254346899230,1cyclictest2566002-21ntpq19:45:161
2543465992322,1cyclictest0-21swapper/022:00:000
2543465992321,1cyclictest2546456-21sed19:15:000
254348699225,0cyclictest0-21swapper/700:26:347
254348699224,0cyclictest0-21swapper/723:53:377
254348699224,0cyclictest0-21swapper/722:36:447
254348699224,0cyclictest0-21swapper/700:04:377
2543486992221,1cyclictest0-21swapper/700:15:117
254348699220,21cyclictest0-21swapper/723:15:117
254348699220,21cyclictest0-21swapper/722:15:127
254348699220,21cyclictest0-21swapper/721:40:117
254348699220,21cyclictest0-21swapper/721:20:127
254348699220,21cyclictest0-21swapper/719:20:107
254348699220,21cyclictest0-21swapper/700:05:127
254348499220,21cyclictest2678087-21apt-get23:00:126
254348499220,21cyclictest0-21swapper/623:25:126
254348499220,21cyclictest0-21swapper/600:20:116
254348499220,1cyclictest0-21swapper/623:45:106
2543479992221,1cyclictest2651823-21apt-get22:15:115
2543479992219,3cyclictest0-21swapper/500:35:125
254347999220,21cyclictest0-21swapper/523:15:115
254347999220,21cyclictest0-21swapper/522:25:115
254347999220,21cyclictest0-21swapper/522:10:105
254347999220,21cyclictest0-21swapper/521:25:125
254347999220,21cyclictest0-21swapper/520:55:145
254347999220,21cyclictest0-21swapper/500:10:135
254347999220,14cyclictest0-21swapper/523:45:115
2543478992220,1cyclictest2610734-21apt-get21:05:124
2543478992220,1cyclictest0-21swapper/421:30:024
2543478992220,1cyclictest0-21swapper/420:50:114
254347899220,22cyclictest0-21swapper/423:40:004
254347899220,1cyclictest0-21swapper/419:25:134
2543475992221,1cyclictest2599309-21apt-get20:45:123
2543475992221,1cyclictest0-21swapper/322:50:013
2543475992221,1cyclictest0-21swapper/319:45:103
2543475992220,1cyclictest2703373-21turbostat23:45:003
2543475992220,1cyclictest2581476-21perf20:15:003
254347599220,21cyclictest0-21swapper/320:00:133
254347599220,1cyclictest0-21swapper/300:35:003
2543473992222,0cyclictest0-21swapper/220:55:122
2543473992221,1cyclictest0-21swapper/223:40:122
2543473992220,1cyclictest0-21swapper/223:25:002
254347399220,22cyclictest0-21swapper/222:20:122
254347399220,21cyclictest0-21swapper/220:50:112
254347399220,21cyclictest0-21swapper/220:40:102
254347399220,21cyclictest0-21swapper/219:55:132
254347399220,21cyclictest0-21swapper/219:15:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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