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2026-05-10 - 04:08

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Sun May 10, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39575322259178,25sleep30-21swapper/319:07:203
39575322259178,25sleep30-21swapper/319:07:203
39575382254176,63sleep00-21swapper/019:07:250
39575382254176,63sleep00-21swapper/019:07:250
39575512238167,22sleep20-21swapper/219:07:362
39575512238167,22sleep20-21swapper/219:07:362
39574382237171,18sleep40-21swapper/419:06:014
39574382237171,18sleep40-21swapper/419:06:004
39575052228172,45sleep60-21swapper/619:06:596
39575052228172,45sleep60-21swapper/619:06:586
39575002224172,20sleep10-21swapper/119:06:541
39575002224172,20sleep10-21swapper/119:06:541
39574592223162,19sleep70-21swapper/719:06:207
39574592223162,19sleep70-21swapper/719:06:207
39574862221185,24sleep50-21swapper/519:06:415
39574862221185,24sleep50-21swapper/519:06:415
395792499270,26cyclictest4076593-21dump-pmu-power22:30:000
395793899260,25cyclictest3988032-21cron20:00:006
395793899260,14cyclictest0-21swapper/600:15:016
395794299250,24cyclictest4007478-21ntpq20:30:197
3957938992520,4cyclictest4094259-21apt-get23:00:006
395793899250,24cyclictest0-21swapper/620:30:116
395793699250,24cyclictest4032746-21apt-get21:15:125
395794299240,24cyclictest0-21swapper/720:40:197
395794299240,23cyclictest0-21swapper/721:50:117
395793899240,24cyclictest4135615-21cron00:10:016
3957936992422,1cyclictest366-21systemd-journal23:25:005
3957936992422,1cyclictest366-21systemd-journal23:24:595
395793699240,23cyclictest4129746-21tar00:00:015
3957933992420,3cyclictest4026854-21apt-get21:05:124
3957929992421,3cyclictest0-21swapper/221:35:112
395792999240,23cyclictest0-21swapper/220:10:012
395792999240,23cyclictest0-21swapper/219:50:122
395792999240,23cyclictest0-21swapper/200:25:012
395792599242,21cyclictest4104685-21/usr/sbin/munin23:15:171
3957942992323,0cyclictest0-21swapper/723:00:177
3957942992322,1cyclictest4138995-21apt-get00:15:117
3957942992321,1cyclictest4070636-21munin-run22:19:597
395794299230,23cyclictest4038226-21munin-run21:25:007
395794299230,22cyclictest4020503-21idleruntime-cro20:55:017
395794299230,22cyclictest3967870-21apt-get19:25:137
395794299230,22cyclictest0-21swapper/723:15:137
395794299230,22cyclictest0-21swapper/722:55:137
395794299230,22cyclictest0-21swapper/722:25:117
395794299230,22cyclictest0-21swapper/700:30:127
395794299230,1cyclictest0-21swapper/723:10:127
395793899230,22cyclictest4020951-21apt-get20:55:146
395793899230,22cyclictest0-21swapper/623:15:136
395793899230,22cyclictest0-21swapper/623:00:126
395793699230,23cyclictest4094340-21923:00:005
395793699230,22cyclictest4138590-21idleruntime-cro00:15:015
395793699230,22cyclictest4100207-21perf23:09:595
395793699230,22cyclictest4035710-21apt-get21:20:135
395793699230,22cyclictest0-21swapper/520:50:135
395793699230,22cyclictest0-21swapper/520:45:135
395793699230,22cyclictest0-21swapper/520:20:115
3957933992322,1cyclictest4015022-21apt-get20:45:124
395793399230,22cyclictest3988500-21apt-get20:00:104
395793399230,22cyclictest3970811-21apt-get19:30:124
395793399230,22cyclictest0-21swapper/419:40:124
395793399230,22cyclictest0-21swapper/419:10:214
395793399230,1cyclictest4023914-21apt-get21:00:134
3957931992321,1cyclictest0-21swapper/300:40:003
395793199230,22cyclictest4082474-21apt22:40:003
395793199230,22cyclictest0-21swapper/323:40:103
395793199230,22cyclictest0-21swapper/323:05:123
395793199230,22cyclictest0-21swapper/321:35:123
395793199230,22cyclictest0-21swapper/321:05:133
395793199230,22cyclictest0-21swapper/319:45:123
395793199230,1cyclictest0-21swapper/321:25:093
3957929992322,1cyclictest4079532-21apt22:35:002
3957929992321,1cyclictest4135630-21grep00:10:002
3957929992321,1cyclictest0-21swapper/223:10:172
3957929992321,1cyclictest0-21swapper/219:45:182
395792999230,22cyclictest4028240-21ntpq21:05:202
395792999230,22cyclictest3973755-21apt-get19:35:132
395792999230,22cyclictest0-21swapper/222:10:112
395792999230,22cyclictest0-21swapper/221:20:002
395792999230,22cyclictest0-21swapper/220:45:202
395792999230,22cyclictest0-21swapper/220:35:122
395792999230,22cyclictest0-21swapper/220:10:122
395792999230,22cyclictest0-21swapper/219:20:012
395792999230,22cyclictest0-21swapper/219:20:002
395792999230,1cyclictest3972197-21ntpq19:30:192
395792999230,1cyclictest0-21swapper/220:05:012
395792999230,0cyclictest0-21swapper/219:10:222
3957925992323,0cyclictest0-21swapper/121:15:131
395792599230,22cyclictest4003233-21apt-get20:25:121
395792599230,22cyclictest0-21swapper/121:20:131
395792599230,22cyclictest0-21swapper/120:05:111
395792599230,0cyclictest0-21swapper/122:55:121
3957924992322,1cyclictest4014593-21turbostat20:45:010
3957924992322,1cyclictest0-21swapper/023:15:000
3957924992322,1cyclictest0-21swapper/022:50:160
395792499230,23cyclictest0-21swapper/020:55:040
3957942992221,1cyclictest0-21swapper/700:25:147
3957942992217,4cyclictest4023478-21systemctl21:00:007
395794299220,22cyclictest3959632-21ntp_states19:10:297
395794299220,22cyclictest0-21swapper/723:45:187
395794299220,22cyclictest0-21swapper/722:00:137
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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