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2026-01-03 - 07:28

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 Sat Jan 03, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
532529381,8sleep00-21swapper/019:09:430
518829166,9sleep20-21swapper/219:07:562
469429167,18sleep30-21swapper/319:05:283
510428265,13sleep10-21swapper/119:06:511
543599254,18cyclictest5746-21aten2_r7power_e19:10:151
543299198,8cyclictest537-21snmpd00:39:400
543599171,14cyclictest18479-21cat00:05:211
543899162,12cyclictest0-21swapper/223:15:142
543899161,1cyclictest0-21swapper/220:05:142
5435991615,0cyclictest0-21swapper/121:35:141
5432991612,3cyclictest13231-21cut23:55:150
544199152,5cyclictest0-21swapper/320:50:153
543299151,7cyclictest28057-21munin-run23:20:000
5432991511,3cyclictest30954-21wc20:00:250
543299150,7cyclictest0-21swapper/020:05:140
5438991410,2cyclictest20165-21sed20:45:262
543599147,6cyclictest27857-21head19:55:171
5435991411,2cyclictest13494-21cron20:35:001
5435991410,3cyclictest21226-21uname21:55:211
5435991410,2cyclictest19689-21munin-plugin-st19:40:001
543299145,6cyclictest161rcuc/020:25:160
543299142,6cyclictest31617-21turbostat.cron00:35:000
543299141,7cyclictest1613-21awk22:25:000
544199139,3cyclictest7173-21taskset21:25:263
544199139,3cyclictest10425-21tr23:50:143
544199139,2cyclictest24641-21wc22:05:013
5441991310,2cyclictest595-21cron21:15:003
5441991310,2cyclictest22162-21cat22:00:003
5441991310,2cyclictest19641-21grep20:45:203
5441991310,2cyclictest16276-21grep21:45:203
5441991310,2cyclictest14917-21latency_hist21:45:003
543899139,3cyclictest10222-21ls20:25:242
543899139,2cyclictest19947-21cat23:00:262
543899139,2cyclictest11471-21grep20:30:162
543899135,4cyclictest225-21systemd-journal00:35:002
5438991310,2cyclictest8597-21grep19:15:182
5438991310,2cyclictest31955-21wc21:10:192
5438991310,2cyclictest21585-21grep19:40:262
5438991310,2cyclictest21130-21grep00:10:222
5438991310,2cyclictest20688-21sed21:55:162
5438991310,2cyclictest17831-21tr19:35:152
5438991310,2cyclictest12617-21cat19:25:002
543599139,3cyclictest5229-21cat23:40:011
543599139,3cyclictest29991-21grep23:20:271
543599139,3cyclictest2759-21cron23:35:001
543599139,2cyclictest14504-21grep21:40:251
543599138,4cyclictest31154-21grep22:15:251
543599137,5cyclictest24639-21cat22:05:011
543599133,7cyclictest4873-21cut20:15:201
5435991310,2cyclictest32653-21head20:05:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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