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2026-11-05 - 15:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack4slot6s.osadl.org (updated Thu Nov 05, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2492421500,3sleep024923-21grep07:50:240
140409912735,15cyclictest13895-21/usr/sbin/munin11:20:120
140409912532,15cyclictest16944-21/usr/sbin/munin07:20:160
2842521220,3chrt28423-21sendmail_mailst12:15:250
140409912231,16cyclictest20837-21/usr/sbin/munin07:35:200
140409911511,17cyclictest29835-21sshd10:15:240
14040991139,17cyclictest11315-21date09:05:010
118921090,3sleep01188-21grep12:35:270
2772621080,2sleep027727-21modprobe08:01:000
191672970,4sleep019168-21/usr/sbin/munin09:35:110
258262950,3sleep025857-21missed_timers10:00:190
181842920,3sleep018217-21proc_pri09:30:250
322932830,3sleep032291-21grep10:25:190
91228211,60sleep0929-21/usr/sbin/munin08:25:000
216472820,3sleep021694-21cat09:45:010
296342760,3sleep029682-21proc_pri12:20:240
1304027419,31sleep013100-21/usr/sbin/munin07:05:180
287592660,3sleep028755-21find08:05:270
14040996534,23cyclictest15232-21/usr/sbin/munin11:25:150
14040996533,23cyclictest5443-21/usr/sbin/munin08:40:270
14040996220,14cyclictest21094-21seq11:47:100
1730026112,41sleep0288-21snmpd11:32:510
1404099617,22cyclictest8331-21sshd08:52:230
14040996034,16cyclictest24225-21/usr/sbin/munin12:00:150
1404099599,19cyclictest17691-21/usr/sbin/munin11:35:160
1404099597,17cyclictest22844-21/usr/sbin/munin11:55:110
14040995935,16cyclictest26836-21/usr/sbin/munin12:10:150
14040995934,16cyclictest9310-21/usr/sbin/munin08:55:280
14040995910,14cyclictest8661-21/usr/sbin/munin11:00:190
1404099589,16cyclictest31986-21sort10:25:010
1404099589,16cyclictest29773-21/usr/sbin/munin08:10:170
1404099589,14cyclictest26927-21/usr/sbin/munin10:05:160
1404099588,17cyclictest30617-21/usr/sbin/munin12:25:150
1404099588,17cyclictest12524-21/usr/sbin/munin11:15:280
1404099588,16cyclictest19304-21/usr/sbin/munin07:30:230
1404099588,15cyclictest16602-21/usr/sbin/munin09:25:260
14040995834,16cyclictest11704-21/usr/sbin/munin09:05:240
14040995812,18cyclictest4790-21/usr/sbin/munin10:45:310
14040995811,16cyclictest3680-21df_inode08:35:140
14040995810,15cyclictest28257-21df10:10:110
14040995810,13cyclictest6456-21awk08:45:190
1404099578,15cyclictest24389-21/usr/sbin/munin09:55:140
1404099578,14cyclictest11238-21/usr/sbin/munin11:10:130
14040995734,15cyclictest2591-21/usr/sbin/munin08:30:180
14040995734,15cyclictest19063-21/usr/sbin/munin11:40:110
14040995732,16cyclictest10489-21/usr/sbin/munin11:05:270
14040995731,16cyclictest32045-21/usr/sbin/munin12:30:160
1404099569,17cyclictest30914-21/usr/sbin/munin08:15:300
1404099569,16cyclictest22199-21sshd07:40:230
1404099568,19cyclictest16263-21sshd07:17:230
1404099568,15cyclictest25454-21/usr/sbin/munin12:05:170
1404099567,17cyclictest7651-21sshd10:55:230
1404099567,16cyclictest19183-21ls07:30:000
14040995631,16cyclictest6474-21/usr/sbin/munin10:50:270
14040995631,16cyclictest1199-21runrttasks10:30:210
14040995610,14cyclictest15275-21/usr/sbin/munin09:20:160
1404099559,14cyclictest240272sleep009:53:370
1404099557,17cyclictest23181-21/usr/sbin/munin07:45:190
1404099557,16cyclictest13949-21/usr/sbin/munin09:15:160
1404099557,15cyclictest12670-21/usr/sbin/munin09:10:190
1404099549,14cyclictest26939-21sendmail-msp08:00:010
1404099548,15cyclictest2195-21/usr/sbin/munin10:35:170
14040995434,13cyclictest1681-21runrttasks08:25:390
14040995432,15cyclictest21975-21runrttasks11:50:250
14040995429,17cyclictest14362-21/usr/sbin/munin07:10:180
1404099539,14cyclictest21899-21irqstats09:45:150
1404099538,15cyclictest3788-21ntpq10:40:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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