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2026-06-13 - 18:21

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Sat Jun 13, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2342622580,2sleep023425-21cat09:50:250
1670622390,3sleep016703-21ps11:30:240
606821280,4chrt6065-21df10:50:120
868221180,5chrt8683-21latency_hist08:55:020
297172990,3sleep029721-21ntp_states10:15:220
285072910,3sleep028550-21ntpq08:05:200
196822910,3sleep019749-21cat07:30:270
156362890,3sleep015662-21/usr/sbin/munin11:25:280
279642870,4sleep028014-21/usr/sbin/munin12:15:130
246662870,2sleep024667-21sort12:00:280
325142770,4sleep032583-21/usr/sbin/munin10:25:290
270122770,3sleep027051-21load10:05:180
155002776,58sleep015503-21irqstats07:15:170
1393727721,32sleep013949-21munin-run07:10:010
321342755,59sleep032138-21ntp_states12:30:220
255862710,2sleep025585-21memory12:05:180
193912680,2sleep019392-21cat09:35:210
190422680,2sleep019043-21latency_hist09:35:010
1397699628,15cyclictest14808-21sshd07:11:330
13976996231,22cyclictest12843-21/usr/sbin/munin09:10:180
1397699618,20cyclictest15259-21/usr/sbin/munin09:20:140
13976996129,21cyclictest23328-21runrttasks11:55:280
13976996126,13cyclictest3660-21missed_timers10:40:190
13976996035,16cyclictest18047-21/usr/sbin/munin11:35:250
13976996034,15cyclictest26824-21/usr/sbin/munin12:10:160
13976995935,15cyclictest2400-21/usr/sbin/munin08:30:150
13976995934,16cyclictest8799-21/usr/sbin/munin11:00:180
1397699588,17cyclictest21509-21/usr/sbin/munin11:50:180
1397699587,15cyclictest17960-21/usr/sbin/munin07:25:190
13976995835,15cyclictest11731-21/usr/sbin/munin11:10:280
13976995833,16cyclictest29347-21/usr/sbin/munin12:20:130
13976995833,14cyclictest8887-21/usr/sbin/munin08:55:160
13976995832,16cyclictest23367-21/usr/sbin/munin07:45:210
13976995811,17cyclictest802-21irqstats12:35:160
13976995811,17cyclictest25656-21/usr/sbin/munin10:00:150
13976995811,16cyclictest16541-21/usr/sbin/munin09:25:180
1397699579,15cyclictest4914-21/usr/sbin/munin08:40:230
1397699579,15cyclictest14206-21/usr/sbin/munin09:15:200
1397699578,18cyclictest3600-21/usr/sbin/munin08:35:290
1397699578,16cyclictest30751-21/usr/sbin/munin10:20:170
1397699578,15cyclictest12465-21/usr/sbin/munin11:15:230
1397699576,18cyclictest30128-21sed08:10:270
13976995734,14cyclictest1146-21/usr/sbin/munin08:25:150
13976995734,13cyclictest22027-21/usr/sbin/munin07:40:190
13976995733,15cyclictest24794-21/usr/sbin/munin09:55:260
13976995733,15cyclictest1138-21/usr/sbin/munin10:30:200
13976995733,15cyclictest10254-21/usr/sbin/munin09:00:160
13976995732,16cyclictest10376-21/usr/sbin/munin11:05:280
1397699569,19cyclictest25791-21if_eth007:55:150
1397699569,17cyclictest18948-21/usr/sbin/munin11:40:270
1397699569,15cyclictest4731-21/usr/sbin/munin10:45:150
1397699569,15cyclictest28145-21/usr/sbin/munin10:10:280
1397699568,15cyclictest983-21latency_hist08:25:010
1397699568,15cyclictest20525-21/usr/sbin/munin07:35:270
1397699568,14cyclictest20416-21/usr/sbin/munin09:40:280
13976995633,15cyclictest13965-21/usr/sbin/munin11:20:170
1397699558,18cyclictest7296-21/usr/sbin/munin10:55:250
1397699558,15cyclictest24904-21ls07:50:260
1397699558,15cyclictest2140-21/usr/sbin/munin10:35:270
1397699557,17cyclictest30562-21/usr/sbin/munin12:25:240
13976995533,14cyclictest7201-21runrttasks08:48:490
13976995533,14cyclictest17491-21runrttasks07:22:130
13976995511,15cyclictest21993-21ntp_states09:45:240
1397699548,16cyclictest11362-21/usr/sbin/munin09:05:200
1397699548,13cyclictest30847-21/usr/sbin/munin08:15:140
1397699547,13cyclictest274592sleep008:00:280
13976995430,15cyclictest20379-21/usr/sbin/munin11:45:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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