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2024-12-10 - 13:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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 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.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Tue Dec 10, 2024 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5661224472207,96sleep00-21swapper19:09:260
57699916213,104cyclictest5103-21cron22:25:010
57699915941,25cyclictest17558-21/usr/sbin/munin23:40:470
57699915920,24cyclictest23848-21munin-run00:20:020
57699915919,114cyclictest2408-21apt-get22:10:380
57699915914,121cyclictest24002-21apt-get00:20:250
57699915818,116cyclictest22805-21munin-run00:15:020
57699915815,118cyclictest18624-21df_inode20:25:310
57699915814,25cyclictest8709-21wc19:25:230
57699915811,123cyclictest11940-21apt-get19:45:160
5769991579,26cyclictest7359-21grep22:36:030
57699915718,115cyclictest10083-21users19:31:070
57699915718,111cyclictest5866-21apt-get19:10:170
57699915716,97cyclictest20113-21apt-get20:35:220
57699915715,119cyclictest28069-21apt-get21:25:380
57699915618,115cyclictest17599-21munin-run20:20:040
57699915617,110cyclictest26558-21apt-get00:35:160
57699915616,114cyclictest25079-21diskstats00:25:400
57699915615,22cyclictest8327-21systemd-journal21:55:010
57699915518,22cyclictest10739-21munin-run23:00:030
57699915517,28cyclictest11748-21munin-run19:45:020
57699915517,114cyclictest21416-21df_inode00:05:290
57699915414,25cyclictest14377-21munin-run20:00:010
57699915414,24cyclictest18966-21cstates23:50:260
57699915414,116cyclictest13964-21munin-run23:20:020
57699915413,100cyclictest13561-21cron19:55:010
57699915412,116cyclictest32542-21apt-get21:55:080
57699915411,26cyclictest5230-21wc22:25:210
57699915410,119cyclictest21159-21grep20:40:430
57699915332,22cyclictest19617-21ntpq20:30:530
57699915322,106cyclictest18415-21munin-run20:25:000
57699915318,107cyclictest24153-21apt-get21:00:180
57699915317,114cyclictest7707-21apt19:20:010
57699915317,112cyclictest14813-21ntp_states20:00:540
57699915316,114cyclictest29898-21munin-run21:35:000
57699915314,115cyclictest30423-21find21:35:580
57699915312,26cyclictest1891-21uname22:05:410
57699915222,110cyclictest4004-21mailstats22:16:040
57699915217,36cyclictest27257-21munin-run21:20:030
57699915216,23cyclictest24033-21munin-run21:00:020
57699915216,23cyclictest18751-21users23:46:080
57699915215,23cyclictest19801-21diskstats23:55:320
57699915214,113cyclictest6783-21sort22:35:040
5769991519,121cyclictest15294-21apt-get20:05:190
57699915117,29cyclictest9238-21apt-get22:50:200
57699915115,113cyclictest21210-21apt00:05:010
57699915114,40cyclictest11768-21diskstats23:05:310
57699915114,113cyclictest31621-21apt-get21:45:210
57699915112,42cyclictest31131-21grep21:40:480
57699915076,53cyclictest7749-21df_inode22:40:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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