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2025-11-21 - 19:27

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 Nov 21, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
948522190,3sleep09488-21latency_hist08:05:020
2817321580,3sleep028176-21grep09:15:270
46121550,2sleep0462-21date07:30:010
164421450,4chrt1645-21/usr/sbin/munin11:45:160
1204821380,3chrt12046-21irqstats12:25:150
704721190,2sleep07046-21netstat10:00:180
2526421020,2sleep025266-21grep11:10:240
2471421000,3sleep024716-21sshd09:03:200
226432990,4sleep022708-21/usr/sbin/munin08:55:210
41152900,4sleep04178-21ls09:50:020
19602814,8sleep01958-21ntp_states09:40:250
162042800,3sleep016205-21/usr/sbin/munin10:35:250
158592794,60sleep015890-21sort08:30:010
2646827218,30sleep026521-21df07:05:120
315222664,51sleep031538-21munin-run07:25:000
2767199619,19cyclictest30239-21/usr/sbin/munin09:25:130
2767199618,20cyclictest4228-21/usr/sbin/munin09:50:150
2767199618,20cyclictest1767-21/usr/sbin/munin07:35:160
192632613,5sleep00-21swapper08:41:010
27671995936,15cyclictest4549-21/usr/sbin/munin07:45:170
27671995917,13cyclictest10696-21latency_hist08:10:020
27671995911,17cyclictest9355-21df12:15:130
27671995910,20cyclictest15667-21sendmail-msp12:40:010
2767199589,16cyclictest16203-21/usr/sbin/munin08:30:200
2767199588,18cyclictest17180-21/usr/sbin/munin10:40:170
2767199587,18cyclictest7066-21/usr/sbin/munin12:05:270
2767199587,17cyclictest5512-21/usr/sbin/munin12:00:150
27671995833,14cyclictest13608-21/usr/sbin/munin08:20:190
27671995811,18cyclictest29549-21users09:20:290
27671995811,14cyclictest9398-21/usr/sbin/munin10:10:300
27671995810,17cyclictest7215-21ntp_states07:55:210
2767199579,19cyclictest3228-21irqstats07:40:190
2767199579,19cyclictest14577-21/usr/sbin/munin10:30:170
2767199579,18cyclictest12008-21/usr/sbin/munin10:20:160
2767199579,16cyclictest4123-21/usr/sbin/munin11:55:190
2767199577,14cyclictest5512-21/usr/sbin/munin09:55:180
27671995732,17cyclictest31919-21/usr/sbin/munin07:25:180
27671995732,15cyclictest29455-21/usr/sbin/munin11:25:300
27671995710,19cyclictest550-21/usr/sbin/munin11:40:210
27671995710,19cyclictest22393-21df11:00:140
2767199569,17cyclictest21351-21memory08:50:170
2767199569,15cyclictest8016-21/usr/sbin/munin12:10:200
2767199569,15cyclictest10942-21/usr/sbin/munin12:20:260
2767199568,17cyclictest5647-21/usr/sbin/munin07:50:210
2767199568,14cyclictest2843-21/usr/sbin/munin11:50:280
2767199567,17cyclictest30352-21date07:20:030
2767199566,13cyclictest19410-21sshd10:48:210
27671995625,22cyclictest0-21swapper11:39:510
27671995610,18cyclictest27427-21munin-run11:20:010
27671995610,15cyclictest30431-21ntp_states11:30:230
2767199559,14cyclictest8532-21/usr/sbin/munin10:05:280
2767199558,16cyclictest19881-21/usr/sbin/munin08:45:260
2767199558,15cyclictest407-21/usr/sbin/munin09:35:130
2767199558,14cyclictest31523-21/usr/sbin/munin09:30:300
27671995532,15cyclictest21212-21/usr/sbin/munin10:55:180
27671995531,16cyclictest13377-21latency_hist08:20:010
27671995515,10cyclictest25191-21interrupts09:05:190
27671995513,14cyclictest279-21sshd10:51:210
27671995511,16cyclictest26533-21memory09:10:170
2767199549,14cyclictest27567-21/usr/sbin/munin11:20:130
2767199547,15cyclictest13288-21/usr/sbin/munin10:25:200
2767199547,14cyclictest242302sleep011:05:310
2767199546,15cyclictest27770-21/usr/sbin/munin07:10:160
2767199546,14cyclictest10817-21/usr/sbin/munin08:10:140
27671995410,13cyclictest17282-21/usr/sbin/munin08:35:250
2767199539,16cyclictest10672-21sshd10:15:050
2767199537,15cyclictest13195-21grep12:30:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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