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2025-11-26 - 14:46

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 Nov 26, 2025 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16602210982,9sleep30-21swapper/307:09:313
16605210692,9sleep10-21swapper/107:09:321
1640028169,8sleep00-21swapper/007:06:540
1652527867,6sleep20-21swapper/207:08:322
1672899290,2cyclictest0-21swapper/011:06:090
1673599260,3cyclictest0-21swapper/210:28:052
1673799240,1cyclictest0-21swapper/310:06:133
1672899244,2cyclictest141rcu_preempt10:12:280
16735992322,1cyclictest0-21swapper/211:23:052
16731992320,2cyclictest10779-21cstates11:50:161
16737992219,2cyclictest252782sleep310:18:233
16737992219,2cyclictest15068-21cpuspeed_turbos10:10:163
1673599221,2cyclictest10219-21diskmemload10:30:572
16731992219,2cyclictest7632-21grep12:35:161
16731992219,2cyclictest6318-21sort12:10:251
16737992118,2cyclictest5931-21needreboot11:45:203
16737992118,2cyclictest21874-21vmstat10:40:313
16737992118,2cyclictest11770-21pmu-power11:50:233
16731992119,1cyclictest500-21in:imuxsock11:29:261
16731992119,1cyclictest27917-21switchtime10:45:261
1672899210,20cyclictest0-21swapper/012:33:090
16735992018,2cyclictest0-21swapper/210:48:102
1673599200,1cyclictest0-21swapper/209:42:122
16731992018,1cyclictest26203-21cstates12:25:141
1672899201,16cyclictest0-21swapper/011:15:130
1672899200,19cyclictest0-21swapper/010:17:010
1673599192,17cyclictest0-21swapper/212:25:322
16731991917,1cyclictest6535-21tr10:55:141
16731991916,2cyclictest25-21ksoftirqd/108:25:001
16731991916,2cyclictest25134-21missed_timers11:35:201
16731991915,3cyclictest19766-21grep09:45:231
1672899190,1cyclictest0-21swapper/011:31:510
16737991816,1cyclictest472-21avahi-daemon10:26:043
16737991815,2cyclictest25830-21df_abs11:10:163
1673599187,8cyclictest0-21swapper/210:10:182
1673599180,2cyclictest0-21swapper/212:34:292
1673599180,1cyclictest0-21swapper/211:55:142
1673599180,15cyclictest0-21swapper/211:31:512
16731991816,1cyclictest7744-21snmpd09:19:001
16731991815,2cyclictest1074-21needreboot12:30:191
1672899180,16cyclictest0-21swapper/011:20:130
1673799172,2cyclictest0-21swapper/312:29:133
16737991714,2cyclictest26691-21cat10:45:153
1673599172,15cyclictest0-21swapper/212:35:042
1673599170,17cyclictest0-21swapper/211:50:062
16731991715,1cyclictest7994-21idleruntime10:30:191
16731991715,1cyclictest496-21dbus-daemon10:05:221
16731991710,3cyclictest6344-21cat11:45:261
1673799160,2cyclictest0-21swapper/309:46:353
16735991616,0cyclictest0-21swapper/211:48:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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