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2026-06-05 - 07:41

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Fri Jun 05, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2754922510,2sleep027547-21if_eth000:10:140
49121820,3sleep0490-21latency22:25:180
1502621280,3chrt15025-21switchtime23:20:260
1222721250,3chrt12224-21ntp_states23:10:210
1354521190,4chrt13546-21awk21:10:160
2252221030,4sleep022556-21if_err_eth021:45:150
1467021030,4sleep014693-21munin-run19:10:010
281522970,4sleep027741-21/usr/sbin/munin20:00:280
106542940,3sleep010681-21cpu23:05:110
5702926,11sleep0593-21uname20:20:150
187042860,3sleep018722-21cpu19:25:110
43612845,65sleep04364-21df_inode20:35:130
60182830,2sleep06017-21wc22:45:270
30842786,61sleep03086-21memory22:35:190
265042774,58sleep026569-21/usr/sbin/munin00:05:280
14721997218,20cyclictest31646-21df20:15:110
185502640,2sleep018552-21latency23:35:170
14721996134,16cyclictest20594-21/usr/sbin/munin19:30:290
14721996112,16cyclictest25314-21ntp_states21:55:240
1472199609,16cyclictest9226-21munin-run23:00:010
14721996034,16cyclictest24142-21/usr/sbin/munin19:45:190
1472199599,16cyclictest29033-21/usr/sbin/munin20:05:160
1472199599,16cyclictest1-21systemd21:26:270
1472199598,16cyclictest5898-21ntp_states20:40:210
1472199597,16cyclictest9505-21/usr/sbin/munin20:55:130
14721995934,16cyclictest9880-21/usr/sbin/munin23:00:280
14721995925,22cyclictest24362-21runrttasks23:57:110
1472199589,16cyclictest30472-21ntp_states22:15:210
1472199589,14cyclictest32649-21df00:30:100
1472199589,13cyclictest232312sleep019:40:500
1472199587,18cyclictest21273-21grep19:35:110
1472199586,17cyclictest5449-21date22:45:010
14721995833,15cyclictest28780-21/usr/sbin/munin00:15:130
14721995831,16cyclictest1880-21/usr/sbin/munin20:25:150
14721995831,16cyclictest15228-21/usr/sbin/munin19:10:250
14721995829,17cyclictest0-21swapper19:15:100
14721995810,16cyclictest17424-21/usr/sbin/munin19:20:270
1472199579,16cyclictest18578-21/usr/sbin/munin21:30:300
1472199579,14cyclictest26628-21ntp_states22:00:250
1472199578,16cyclictest22821-21/usr/sbin/munin23:50:280
1472199578,15cyclictest17173-21/usr/sbin/munin23:30:120
1472199578,15cyclictest16971-21chrt23:29:570
14721995733,16cyclictest12503-21/usr/sbin/munin21:05:250
14721995733,15cyclictest3340-21/usr/sbin/munin20:30:230
14721995732,15cyclictest25127-21/usr/sbin/munin00:00:190
14721995731,15cyclictest11217-21/usr/sbin/munin21:00:250
14721995711,14cyclictest276-21runrttasks00:20:240
1472199569,16cyclictest21417-21/usr/sbin/munin21:40:200
1472199569,15cyclictest25213-21/usr/sbin/munin19:50:130
1472199568,17cyclictest20988-21/usr/sbin/munin23:45:260
1472199568,14cyclictest31687-21/usr/sbin/munin22:20:170
1472199568,14cyclictest2603-21modprobe00:40:000
1472199567,17cyclictest14688-21/usr/sbin/munin21:15:150
1472199566,16cyclictest16415-21grep21:20:270
14721995633,14cyclictest2331-21runrttasks22:31:250
14721995632,15cyclictest26618-21/usr/sbin/munin19:55:160
14721995622,11cyclictest28110-21switchtime22:05:280
14721995610,17cyclictest7494-21sshd22:51:270
1472199559,17cyclictest28956-21df22:10:120
1472199558,17cyclictest19704-21/usr/sbin/munin23:40:270
1472199558,15cyclictest30312-21/usr/sbin/munin20:10:240
1472199557,15cyclictest23737-21/usr/sbin/munin21:50:150
14721995531,15cyclictest13834-21runrttasks23:15:310
14721995510,15cyclictest8457-21ntpq20:50:200
1472199549,17cyclictest20162-21awk21:35:240
1472199549,15cyclictest31450-21/usr/sbin/munin00:25:170
14721995429,15cyclictest7164-21/usr/sbin/munin20:45:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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