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2024-04-26 - 06:05

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 50 highest latencies:
System rackeslot5s.osadl.org (updated Fri Apr 26, 2024 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3272992819,8cyclictest31985-21apache200:00:003
326699280,22cyclictest12482-21munin-plugin-st21:25:000
326699280,1cyclictest15076-21perl23:42:450
326899275,4cyclictest28991-21diskmemload23:04:582
326699270,1cyclictest21862-21awk23:15:000
3267992623,2cyclictest4873-21sh21:48:381
3272992523,1cyclictest13685-21ssh00:15:083
327299250,24cyclictest0-21swapper/300:34:563
327299250,24cyclictest0-21swapper/300:03:253
327299250,1cyclictest0-21swapper/300:35:133
327299250,0cyclictest0-21swapper/321:50:413
3268992523,1cyclictest24416-21rm21:37:312
3266992523,2cyclictest0-21swapper/023:46:090
3266992523,1cyclictest597-21dbus-daemon19:34:590
3266992521,0cyclictest28991-21diskmemload00:00:190
3266992520,1cyclictest0-21swapper/023:37:570
326699251,23cyclictest597-21dbus-daemon21:35:000
326699250,24cyclictest30504-21ssh21:11:580
326699250,21cyclictest28991-21diskmemload23:07:070
3272992422,2cyclictest0-21swapper/323:38:163
3272992422,1cyclictest0-21swapper/321:48:013
327299240,24cyclictest0-21swapper/323:50:393
327299240,24cyclictest0-21swapper/322:18:493
327299240,24cyclictest0-21swapper/322:10:283
327299240,23cyclictest28991-21diskmemload21:31:573
327299240,23cyclictest0-21swapper/323:15:543
327299240,21cyclictest0-21swapper/323:33:263
327299240,21cyclictest0-21swapper/321:20:393
327299240,20cyclictest0-21swapper/322:05:253
327299240,0cyclictest0-21swapper/300:08:153
3268992423,1cyclictest28991-21diskmemload23:59:112
3268992423,1cyclictest0-21swapper/223:17:472
326899240,23cyclictest28991-21diskmemload21:18:462
326899240,23cyclictest23773-21apt-get23:52:422
326899240,21cyclictest0-21swapper/221:13:052
3267992424,0cyclictest0-21swapper/122:31:301
3267992423,1cyclictest0-21swapper/119:52:411
326799240,23cyclictest7148-21ssh21:51:481
326799240,23cyclictest6955-21rm21:19:581
326799240,23cyclictest28991-21diskmemload21:56:421
326799240,23cyclictest19156-21apt-get23:47:431
326799240,23cyclictest0-21swapper/123:01:291
326799240,23cyclictest0-21swapper/121:40:561
326799240,1cyclictest29074-21apt-get00:32:411
326799240,0cyclictest0-21swapper/100:20:191
326699243,21cyclictest62150irq/126-eno122:28:400
3266992422,2cyclictest0-21swapper/023:02:370
3266992422,2cyclictest0-21swapper/022:45:140
3266992421,0cyclictest28991-21diskmemload00:07:380
326699240,24cyclictest0-21swapper/021:27:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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