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2025-01-22 - 12:43

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Wed Jan 22, 2025 00:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6175210188,9sleep10-21swapper/119:09:521
5965210082,10sleep30-21swapper/319:07:103
600628363,16sleep20-21swapper/219:07:402
600428166,9sleep00-21swapper/019:07:380
229732340,1chrt224-21systemd-journal19:45:010
628199300,29cyclictest0-21swapper/300:32:343
628199263,2cyclictest21279-21grep20:50:133
628199250,1cyclictest0-21swapper/323:28:083
628199250,1cyclictest0-21swapper/300:01:043
627399250,23cyclictest0-21swapper/021:33:080
6281992423,1cyclictest0-21swapper/321:18:593
628199240,1cyclictest141rcu_preempt22:15:123
628199234,10cyclictest0-21swapper/323:30:093
628199231,4cyclictest224-21systemd-journal23:15:003
628199212,1cyclictest0-21swapper/300:06:103
628199210,7cyclictest21400-21grep22:20:203
628199210,21cyclictest0-21swapper/322:02:523
627899210,20cyclictest0-21swapper/221:30:222
628199200,3cyclictest0-21swapper/320:30:183
628199200,0cyclictest0-21swapper/321:39:273
628199192,7cyclictest29782-21diskmemload21:30:103
6278991916,1cyclictest0-21swapper/200:05:002
627899190,4cyclictest0-21swapper/221:26:422
627899190,16cyclictest0-21swapper/223:34:452
627599199,9cyclictest9271-21apache222:02:411
628199184,2cyclictest21106-21latency_hist00:25:003
628199182,15cyclictest12673-21sh21:46:573
627899180,16cyclictest0-21swapper/223:15:562
627899180,14cyclictest0-21swapper/223:10:202
627399184,8cyclictest31190-21awk22:55:000
6273991813,4cyclictest14312-21ssh00:19:450
628199175,3cyclictest224-21systemd-journal20:00:203
628199172,7cyclictest13981-21chrt00:19:243
628199171,2cyclictest0-21swapper/323:04:513
6281991710,6cyclictest20628-21taskset23:59:553
627899179,6cyclictest6441-21/usr/sbin/munin21:40:272
6278991716,1cyclictest0-21swapper/221:35:402
627899170,17cyclictest0-21swapper/222:59:512
628199169,7cyclictest0-21swapper/323:09:513
628199169,6cyclictest17922-21turbostat21:25:013
628199169,6cyclictest15883-21head20:35:183
628199169,2cyclictest39-21ksoftirqd/323:18:503
628199162,12cyclictest16105-21apt-get19:30:163
6281991610,5cyclictest1017-21sed22:55:253
6278991610,5cyclictest25368-21basename19:50:012
6275991615,1cyclictest0-21swapper/123:03:041
6273991616,0cyclictest0-21swapper/019:35:140
628199159,5cyclictest23573-21grep20:55:143
628199159,5cyclictest11142-21cut20:25:173
628199158,2cyclictest5392-21grep21:40:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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