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2025-12-06 - 22:52

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 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 50 highest latencies:
System rackeslot5s.osadl.org (updated Sat Dec 06, 2025 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2219299250,24cyclictest12322-21idleruntime-cro12:20:000
22195992422,1cyclictest9855-21cron07:50:003
22195992321,1cyclictest27442-21cron11:45:003
2219499230,22cyclictest0-21swapper/209:23:282
22193992321,1cyclictest21944-21perf12:40:001
22193992320,2cyclictest22652-21apt11:35:001
22195992221,1cyclictest20454-21apt-get08:13:233
22195992220,1cyclictest12850-21apt-get07:58:233
22195992219,2cyclictest19953-21munin-plugin-st08:10:003
2219599220,21cyclictest7277-21apt-get08:53:243
2219599220,21cyclictest5725-21turbostat11:00:003
2219599220,21cyclictest4881-21apt-get08:48:253
2219599220,21cyclictest30539-21perf10:45:003
2219599220,21cyclictest24751-21sendmail08:20:003
2219599220,21cyclictest0-21swapper/312:33:263
2219599220,21cyclictest0-21swapper/312:08:263
22194992220,1cyclictest23165-21apt-get11:38:252
22194992220,1cyclictest0-21swapper/209:38:262
2219499220,2cyclictest14769-21dpkg08:00:012
2219499220,21cyclictest593-21dbus-daemon11:00:002
2219499220,21cyclictest461-21apt-get10:50:012
2219499220,21cyclictest19344-21apt-get09:18:262
2219499220,1cyclictest6302-21apt-get11:03:262
2219499220,1cyclictest18816-21latency_hist09:15:002
22193992221,0cyclictest0-21swapper/107:33:231
22193992220,1cyclictest29876-21perf11:49:591
22193992220,1cyclictest2219-21cron12:00:011
2219399220,21cyclictest6161-21apt-get09:58:241
2219399220,21cyclictest27175-21perf08:25:001
2219399220,21cyclictest20454-21apt-get08:13:231
2219399220,21cyclictest0-21swapper/112:28:251
2219399220,21cyclictest0-21swapper/107:58:221
2219399220,1cyclictest313-21systemd-journal08:10:001
22192992221,1cyclictest11372-21apt-get10:08:260
22192992220,1cyclictest2168-21apt-get07:35:000
22192992220,1cyclictest18793-21cron09:15:000
22192992220,1cyclictest0-21swapper/010:43:250
2219299220,21cyclictest2277-21munin-run12:00:010
2219299220,21cyclictest18365-21apt-get11:28:270
2219299220,21cyclictest0-21swapper/011:18:240
2219299220,21cyclictest0-21swapper/009:48:250
2219299220,21cyclictest0-21swapper/009:33:250
2219299220,21cyclictest0-21swapper/009:18:260
2219299220,21cyclictest0-21swapper/008:28:260
2219299220,1cyclictest24773-21grep08:20:000
22195992121,0cyclictest0-21swapper/308:03:253
22195992119,2cyclictest27679-21apt-get08:28:253
22195992119,1cyclictest30857-21turbostat09:40:013
2219599210,20cyclictest8180-21perf11:05:003
2219599210,20cyclictest31379-21apt-get09:43:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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