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2026-09-01 - 15:30

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 Tue Sep 01, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1793621960,2sleep017934-21grep11:45:270
1132821120,4sleep011025-21/usr/sbin/munin11:20:240
2003221070,4sleep020033-21munin-node11:55:100
2707721020,4sleep027146-21uptime12:20:270
1506821010,4sleep015092-21grep11:35:200
1393121010,4sleep013935-21latency09:25:180
278302915,11sleep027857-21munin-run10:20:000
115882870,3sleep011585-21find09:15:260
284422840,3sleep028452-21vmstat12:25:300
190882774,60sleep018946-21/usr/sbin/munin09:45:180
1019027619,33sleep010205-21irqstats07:05:160
283872740,3sleep028434-21cat10:20:240
35302700,2sleep03531-21/usr/sbin/munin08:45:130
50012650,2sleep05004-21grep08:50:210
11259996235,19cyclictest12450-21/usr/sbin/munin11:25:150
11259996121,14cyclictest23990-21latency_hist10:05:010
11259996110,19cyclictest21981-21ntp_states07:50:240
11259996110,16cyclictest25853-21ntp_states08:05:220
1125999609,17cyclictest17883-21/usr/sbin/munin09:40:170
1125999608,20cyclictest194492chrt07:40:240
11259996032,17cyclictest15120-21/usr/sbin/munin09:30:110
1125999597,19cyclictest24193-21tr12:10:210
11259995935,16cyclictest24626-21/usr/sbin/munin10:05:280
11259995930,16cyclictest5931-21/usr/sbin/munin11:00:150
11259995910,18cyclictest24281-21/usr/sbin/munin08:00:170
1125999589,18cyclictest11489-21/usr/sbin/munin07:10:150
1125999589,16cyclictest16189-21/usr/sbin/munin11:40:180
11259995834,16cyclictest18941-21/usr/sbin/munin11:50:180
11259995810,16cyclictest29524-21/usr/sbin/munin10:25:190
1125999579,16cyclictest27070-21sort08:10:180
1125999579,15cyclictest7451-21irqstats09:00:150
1125999579,15cyclictest22966-21/usr/sbin/munin07:55:290
1125999578,17cyclictest22937-21ntpq12:05:240
1125999578,15cyclictest4538-21/usr/sbin/munin10:55:110
1125999577,18cyclictest31901-21df10:35:150
11259995733,16cyclictest32326-21runrttasks08:30:240
11259995733,15cyclictest29594-21/usr/sbin/munin08:20:160
11259995733,15cyclictest2399-21/usr/sbin/munin08:40:190
11259995732,16cyclictest29723-21/usr/sbin/munin12:30:290
11259995732,15cyclictest9899-21/usr/sbin/munin11:15:190
11259995732,15cyclictest28222-21/usr/sbin/munin08:15:170
11259995731,16cyclictest30493-21/usr/sbin/munin12:35:150
11259995725,21cyclictest22250-21runrttasks12:02:550
11259995711,16cyclictest8474-21df11:10:130
1125999568,16cyclictest20405-21/usr/sbin/munin07:45:290
1125999567,17cyclictest6001-21/usr/sbin/munin08:55:270
11259995634,15cyclictest20544-21/usr/sbin/munin09:50:250
11259995632,17cyclictest25234-21runrttasks12:15:060
11259995619,14cyclictest276-21runrttasks09:38:390
11259995610,15cyclictest13823-21/usr/sbin/munin11:30:200
1125999559,16cyclictest18406-21users07:35:300
1125999558,16cyclictest30557-21/usr/sbin/munin10:30:250
1125999558,16cyclictest264452chrt10:14:130
1125999558,16cyclictest16580-21df07:30:130
1125999557,17cyclictest31065-21chrt08:25:240
1125999557,16cyclictest975-21ntp_states10:40:220
1125999557,15cyclictest9895-21/usr/sbin/munin09:10:150
1125999557,13cyclictest2364-21/usr/sbin/munin10:45:240
11259995530,16cyclictest21648-21/usr/sbin/munin09:55:150
11259995510,14cyclictest8607-21/usr/sbin/munin09:05:210
1125999548,14cyclictest12644-21/usr/sbin/munin07:15:100
1125999547,15cyclictest14108-21/usr/sbin/munin07:20:170
1125999547,14cyclictest3259-21grep10:50:110
1125999547,14cyclictest158912chrt07:25:470
11259995431,14cyclictest952-21/usr/sbin/munin08:35:170
11259995430,16cyclictest7323-21/usr/sbin/munin11:05:190
11259995428,15cyclictest12669-21/usr/sbin/munin09:20:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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