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2026-08-01 - 01:50

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 Fri Jul 31, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2460022550,3sleep024604-21timerwakeupswit10:50:280
1397122220,2sleep013969-21grep12:15:260
655921230,3sleep06561-21grep09:40:270
731421220,4chrt7313-21/usr/sbin/munin09:45:120
3234221120,3sleep032344-21memory07:10:190
200821110,4sleep01923-21/usr/sbin/munin11:30:140
102702990,4sleep010299-21ntpq07:50:240
125462960,4sleep012246-21/usr/sbin/munin12:10:240
264742925,9sleep026490-21cron11:00:000
204102850,2sleep020411-21df08:30:140
292712840,4sleep029317-21latency_hist09:05:020
166872793,5sleep00-21swapper10:20:270
3199927821,32sleep032022-21munin-run07:10:000
164302700,2sleep016431-21ntp_states12:25:230
226572670,3sleep022656-21sort10:45:010
89842630,2sleep08985-21/usr/sbin/munin07:45:200
32052996219,13cyclictest29807-21users11:10:300
3205299619,17cyclictest21340-21munin-run10:40:010
3205299619,15cyclictest4528-21/usr/sbin/munin11:40:230
3205299618,15cyclictest21632-21/usr/sbin/munin08:35:280
3205299618,13cyclictest9566-21wc12:00:010
32052996111,20cyclictest12488-21df10:05:120
32052996111,17cyclictest10891-21sshd09:59:150
32052996110,15cyclictest19657-21users08:25:290
32052996033,16cyclictest11177-21/usr/sbin/munin12:05:190
32052996030,18cyclictest0-21swapper10:10:100
32052996011,16cyclictest25794-21ntp_states08:50:220
89702590,2sleep08968-21mailstats09:50:260
32052995934,16cyclictest28373-21/usr/sbin/munin11:05:260
32052995934,15cyclictest29600-21/usr/sbin/munin09:05:190
32052995933,16cyclictest31945-21/usr/sbin/munin11:20:160
32052995933,15cyclictest1079-21/usr/sbin/munin07:15:150
32052995933,14cyclictest24813-21/usr/sbin/munin08:45:290
32052995910,16cyclictest30497-21/usr/sbin/munin11:15:270
32052995910,16cyclictest19219-21grep12:35:290
3205299589,14cyclictest5799-21/usr/sbin/munin11:45:100
3205299588,17cyclictest3707-21seq07:25:160
3205299588,17cyclictest14846-21/usr/sbin/munin12:20:290
3205299588,15cyclictest18885-21/usr/sbin/munin10:30:170
3205299587,16cyclictest636-21/usr/sbin/munin11:25:150
32052995834,15cyclictest3449-21/usr/sbin/munin09:30:130
32052995834,14cyclictest2627-21/usr/sbin/munin09:25:270
3205299578,15cyclictest17414-21/usr/sbin/munin12:30:170
3205299577,19cyclictest4678-21/usr/sbin/munin09:35:120
3205299577,17cyclictest28061-21date09:00:020
32052995732,17cyclictest9760-21/usr/sbin/munin12:00:140
32052995732,15cyclictest3876-21runrttasks11:36:000
32052995731,16cyclictest0-21swapper10:15:100
32052995730,17cyclictest14034-21/usr/sbin/munin08:05:190
32052995729,17cyclictest32100-21/usr/sbin/munin09:15:150
32052995710,19cyclictest1108-21ntpq09:20:210
32052995710,16cyclictest11888-21/usr/sbin/munin07:55:290
3205299569,18cyclictest11146-21/usr/sbin/munin10:00:290
3205299568,16cyclictest17843-21df_inode08:20:140
3205299567,15cyclictest4859-21/usr/sbin/munin07:30:250
32052995632,16cyclictest16797-21/usr/sbin/munin08:15:260
32052995632,15cyclictest8042-21/usr/sbin/munin07:40:300
32052995631,15cyclictest7292-21/usr/sbin/munin11:50:190
32052995630,16cyclictest23128-21/usr/sbin/munin08:40:180
32052995628,16cyclictest18044-21/usr/sbin/munin10:25:260
32052995616,13cyclictest0-21swapper10:45:300
3205299557,22cyclictest15182-21/usr/sbin/munin08:10:150
3205299557,15cyclictest26641-21/usr/sbin/munin11:00:140
32052995532,16cyclictest7107-21runrttasks07:38:290
32052995531,15cyclictest31037-21/usr/sbin/munin09:10:250
32052995530,16cyclictest2592-21runrttasks07:20:240
32052995529,16cyclictest12599-21runrttasks08:00:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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