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2025-06-21 - 22:56

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 50 highest latencies:
System rack4slot6s.osadl.org (updated Sat Jun 21, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
86722490,3sleep0868-21cat08:30:300
11084214718,30sleep011082-21ntp_states07:05:260
2089721290,4chrt20895-21irqstats11:55:180
1454321270,3sleep014545-21idleruntime-cro07:20:010
2876521150,4sleep028714-21/usr/sbin/munin10:20:140
1071021150,4sleep010708-21ntp_states11:15:250
184772960,3sleep018479-21ntpq11:45:240
51162930,3sleep05122-21modprobe10:54:590
318712910,4sleep031873-21who10:30:330
261602840,3sleep026176-21munin-plugin-st08:05:010
151612830,3sleep015226-21timerandwakeup07:20:290
11988996729,14cyclictest8662-21users09:00:500
11988996332,21cyclictest24683-21/usr/sbin/munin12:10:130
11988996330,20cyclictest19727-21/usr/sbin/munin09:45:160
11988996313,20cyclictest27850-21ntpq08:10:230
11988996220,15cyclictest29134-21/usr/sbin/munin08:15:210
11988996131,20cyclictest4656-21/usr/sbin/munin08:45:300
106972610,2sleep010698-21/usr/sbin/munin09:10:150
1198899609,17cyclictest9325-21/usr/sbin/munin09:05:280
1198899599,16cyclictest2877-21/usr/sbin/munin08:40:270
1198899598,18cyclictest2871-21grep10:45:250
1198899598,18cyclictest22417-21/usr/sbin/munin07:50:170
1198899589,15cyclictest17259-21/usr/sbin/munin07:30:210
1198899588,17cyclictest31462-21/usr/sbin/munin08:25:210
1198899588,17cyclictest18541-21/usr/sbin/munin07:35:300
1198899588,16cyclictest15591-21/usr/sbin/munin11:35:150
11988995835,14cyclictest5834-21/usr/sbin/munin08:50:270
11988995832,16cyclictest24357-21runrttasks10:02:130
11988995824,20cyclictest30087-21/usr/sbin/munin12:30:230
11988995810,16cyclictest25266-21snmpd11:20:130
11988995810,16cyclictest17051-21irqstats11:40:180
1198899579,18cyclictest5445-21memory10:55:210
1198899579,18cyclictest13490-21ntpq09:20:210
1198899579,16cyclictest29779-21date12:30:020
1198899579,16cyclictest23368-21/usr/sbin/munin12:05:370
1198899578,16cyclictest32565-21/usr/sbin/munin10:35:300
1198899578,16cyclictest27243-21/usr/sbin/munin12:20:160
1198899578,16cyclictest13083-21df11:25:150
1198899577,17cyclictest26300-21/usr/sbin/munin08:05:170
1198899577,16cyclictest17753-21seq09:36:070
11988995732,15cyclictest1709-21/usr/sbin/munin08:35:180
11988995711,16cyclictest20036-21/usr/sbin/munin11:50:290
1198899569,16cyclictest16262-21ntpq07:25:250
1198899569,15cyclictest7048-21/usr/sbin/munin11:00:280
1198899569,15cyclictest31089-21/usr/sbin/munin12:35:130
1198899568,17cyclictest18384-21/usr/sbin/munin09:40:320
1198899568,16cyclictest24834-21/usr/sbin/munin10:05:200
1198899568,15cyclictest19829-21modprobe07:40:010
1198899568,14cyclictest14301-21chrt11:30:070
1198899566,17cyclictest9427-21ntp_states11:10:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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