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2025-12-21 - 07:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 20 highest latencies:
System rack7slot7s.osadl.org (updated Sun Dec 21, 2025 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1303529064,8sleep00-21swapper/019:09:460
1299229077,9sleep20-21swapper/219:09:132
1301628366,13sleep10-21swapper/119:09:321
1295627966,9sleep30-21swapper/319:08:463
1314499260,1cyclictest0-21swapper/323:40:143
1314099250,20cyclictest0-21swapper/220:35:142
1313799245,10cyclictest0-21swapper/121:10:121
1313799245,10cyclictest0-21swapper/121:10:111
13137991919,0cyclictest0-21swapper/119:10:151
13137991917,1cyclictest11962-21ls20:14:591
1313099197,6cyclictest30765-21munin-run23:10:010
13140991813,4cyclictest14295-21systemctl20:20:002
13140991716,1cyclictest0-21swapper/221:35:142
1314099171,13cyclictest0-21swapper/221:25:182
1313099164,6cyclictest22687-21perf21:45:010
1314499152,3cyclictest225-21systemd-journal00:00:003
13144991511,2cyclictest11650-21cron22:29:593
13144991510,3cyclictest6882-21cron22:19:593
1313799152,7cyclictest225-21systemd-journal00:19:591
13137991511,3cyclictest23382-21tune2fs00:00:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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