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2025-12-14 - 19:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 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 rackeslot5s.osadl.org (updated Sun Dec 14, 2025 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28857992622,3cyclictest18567-21apt-get12:24:212
2885899240,23cyclictest11357-21apt-get12:09:213
28857992422,1cyclictest11107-21idleruntime-cro11:00:012
2885799240,2cyclictest31515-21idleruntime-cro10:35:002
2885799240,23cyclictest4505-21apt-get10:49:212
28856992421,2cyclictest23179-21awk12:30:011
2885599240,23cyclictest0-21swapper/007:45:020
2885899230,22cyclictest29865-21turbostat.cron09:25:013
2885899230,22cyclictest20951-21awk08:00:003
2885899230,22cyclictest10585-21awk08:45:003
28857992321,1cyclictest606-21dbus-daemon09:00:012
28857992321,1cyclictest19028-21cron10:10:012
28857992319,3cyclictest8797-21apt-get08:44:212
2885799230,22cyclictest4226-21apt-get07:29:192
2885799230,22cyclictest10971-21runrttasks07:40:012
28856992321,1cyclictest30774-21apt-get11:40:011
2885699231,21cyclictest0-21swapper/107:49:191
2885699230,22cyclictest15530-21cron12:15:011
2885699230,22cyclictest0-21swapper/111:35:011
28855992323,0cyclictest0-21swapper/010:09:210
28855992321,1cyclictest3986-21apt-get08:34:220
28855992321,1cyclictest0-21swapper/007:15:000
28855992320,2cyclictest606-21dbus-daemon09:20:010
28855992320,2cyclictest15556-21grep12:15:010
2885599230,1cyclictest31016-21perf08:20:010
2885899220,21cyclictest8705-21turbostat10:55:013
2885899220,21cyclictest21543-21apt-get08:04:213
2885899220,1cyclictest30454-21apt-get09:29:223
2885899220,1cyclictest20787-21apt-get09:09:213
28857992221,0cyclictest31601-21apt-get08:24:212
28857992220,1cyclictest606-21dbus-daemon12:30:012
28857992220,1cyclictest20691-21tr11:20:002
28857992220,1cyclictest20181-21awk09:05:012
28857992220,1cyclictest10761-21turbostat.cron12:05:002
2885799220,21cyclictest5801-21munin-run08:35:012
2885799220,21cyclictest2113-21apt-get10:44:212
2885799220,21cyclictest1757-21apt-get11:49:232
2885799220,21cyclictest11543-21apt-get07:44:192
2885799220,1cyclictest0-21swapper/211:55:002
28856992220,1cyclictest25582-21apt-get09:19:221
2885699220,21cyclictest6549-21apt-get11:59:221
2885699220,21cyclictest0-21swapper/112:39:211
2885699220,21cyclictest0-21swapper/111:40:021
2885699220,21cyclictest0-21swapper/110:25:001
2885699220,21cyclictest0-21swapper/107:39:201
28855992221,0cyclictest0-21swapper/007:19:200
28855992220,1cyclictest26329-21apt-get08:14:200
2885599220,21cyclictest0-21swapper/007:24:200
2885599220,1cyclictest31772-21apt-get11:44:210
2885599220,1cyclictest17985-21munin-run12:20:010
28858992121,0cyclictest0-21swapper/311:24:223
28858992121,0cyclictest0-21swapper/308:15:023
28858992120,1cyclictest6627-21apt-get07:34:203
28858992120,1cyclictest388-21apt-get09:34:213
28858992119,1cyclictest18315-21perf11:15:003
28858992118,2cyclictest17765-21sendmail09:00:013
2885899210,20cyclictest18397-21apt-get09:04:213
2885899210,1cyclictest17964-21sendmail-msp12:20:013
28857992120,1cyclictest28957-21apt-get11:39:202
28857992120,1cyclictest24852-21apt-get10:24:192
28857992120,0cyclictest0-21swapper/212:19:222
28857992120,0cyclictest0-21swapper/207:34:202
28857992119,2cyclictest0-21swapper/212:35:032
2885799210,20cyclictest11862-21perf09:55:012
2885799210,20cyclictest0-21swapper/211:25:032
2885799210,20cyclictest0-21swapper/208:49:212
2885799210,20cyclictest0-21swapper/208:39:212
2885799210,20cyclictest0-21swapper/208:09:212
2885799210,1cyclictest9447-21turbostat09:50:012
2885799210,1cyclictest29430-21apt-get07:14:212
28856992121,0cyclictest0-21swapper/110:54:211
28856992120,1cyclictest0-21swapper/109:54:201
2885699210,21cyclictest0-21swapper/109:59:211
2885699210,21cyclictest0-21swapper/109:14:201
2885699210,20cyclictest0-21swapper/107:44:191
2885699210,0cyclictest0-21swapper/112:09:201
2885699210,0cyclictest0-21swapper/109:04:211
2885699210,0cyclictest0-21swapper/108:59:211
2885699210,0cyclictest0-21swapper/107:19:201
28855992121,0cyclictest0-21swapper/012:09:210
28855992120,1cyclictest26598-21apt-get12:39:210
28855992120,1cyclictest11712-21apt-get11:04:220
28855992120,1cyclictest0-21swapper/011:54:220
28855992120,1cyclictest0-21swapper/008:24:210
28855992120,0cyclictest0-21swapper/012:04:210
28855992120,0cyclictest0-21swapper/010:54:210
28855992119,1cyclictest0-21swapper/008:39:200
2885599210,20cyclictest0-21swapper/010:49:210
2885599210,20cyclictest0-21swapper/007:59:210
2885599210,0cyclictest0-21swapper/009:49:210
2885599210,0cyclictest0-21swapper/009:29:220
2885599210,0cyclictest0-21swapper/009:24:210
2885599210,0cyclictest0-21swapper/009:04:210
28858992020,0cyclictest0-21swapper/311:39:213
28858992020,0cyclictest0-21swapper/311:04:223
28858992020,0cyclictest0-21swapper/309:49:213
28858992020,0cyclictest0-21swapper/309:19:213
28858992020,0cyclictest0-21swapper/307:29:193
28858992020,0cyclictest0-21swapper/307:24:213
28858992019,1cyclictest5257-21apt-get09:44:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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