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2025-12-01 - 13:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Mon Dec 01, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16185402231169,21sleep10-21swapper/119:09:241
16185082222166,44sleep70-21swapper/719:08:597
16184562219185,22sleep30-21swapper/319:08:153
16182872218163,18sleep50-21swapper/519:05:525
16184082216164,17sleep00-21swapper/019:07:320
16183292214158,18sleep60-21swapper/619:06:256
16183522208175,21sleep20-21swapper/219:06:452
16161362206160,17sleep40-21swapper/419:05:114
161882599287,4cyclictest0-21swapper/723:15:227
161882599286,4cyclictest0-21swapper/720:41:367
161882599276,4cyclictest0-21swapper/722:42:257
161882599275,4cyclictest0-21swapper/719:13:447
161882599275,4cyclictest0-21swapper/700:21:167
1618825992719,8cyclictest0-21swapper/723:04:237
1618823992719,7cyclictest1717125-21grep22:00:016
161882399270,22cyclictest0-21swapper/619:25:006
1618805992722,4cyclictest1774294-21basename23:40:000
1618823992623,2cyclictest0-21swapper/620:55:146
1618818992624,1cyclictest0-21swapper/420:05:004
161881499260,25cyclictest1621539-21latency_hist19:15:003
1618805992622,3cyclictest1665418-21munin-run20:30:000
161882599250,24cyclictest2970800-21systemd-journal20:40:007
1618823992520,4cyclictest0-21swapper/600:00:006
161882399250,24cyclictest1694031-21awk21:20:016
161881899250,24cyclictest1790053-21apt00:10:094
161880599250,24cyclictest0-21swapper/020:45:140
161882599247,4cyclictest0-21swapper/722:09:287
161882599246,0cyclictest0-21swapper/721:25:327
1618823992421,2cyclictest1642277-21apt-get19:50:006
161882399240,23cyclictest0-21swapper/620:40:146
161882099240,22cyclictest1763294-21apt-get23:20:125
1618818992422,1cyclictest1804354-21apt-get00:35:154
161881899240,24cyclictest0-21swapper/420:55:144
1618814992424,0cyclictest0-21swapper/321:25:133
1618814992421,2cyclictest1774289-21munin-run23:39:593
1618811992423,1cyclictest0-21swapper/219:45:122
161880999240,23cyclictest1625131-21munin-run19:20:001
161880599241,23cyclictest1694030-21sendmail-msp21:20:010
161880599240,23cyclictest0-21swapper/022:00:130
161882599236,0cyclictest0-21swapper/723:59:187
161882599236,0cyclictest0-21swapper/723:48:187
161882599236,0cyclictest0-21swapper/723:26:217
161882599236,0cyclictest0-21swapper/722:31:267
161882599236,0cyclictest0-21swapper/722:20:277
161882599236,0cyclictest0-21swapper/720:19:387
161882599236,0cyclictest0-21swapper/720:19:377
161882599235,0cyclictest0-21swapper/719:24:437
1618825992323,0cyclictest0-21swapper/719:45:127
1618823992318,4cyclictest0-21swapper/622:05:016
161882399230,22cyclictest1795352-21munin-run00:20:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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