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2025-10-18 - 16:51

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 Sat Oct 18, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
900722140,3sleep09005-21cat11:30:020
2715721510,2sleep027158-21ls10:35:010
1754721380,3sleep017546-21timerandwakeup07:50:290
517321280,3chrt5174-21cat09:10:020
3097621090,3sleep022189-21snmpd08:43:590
1091121040,4sleep010967-21/usr/sbin/munin09:30:320
2872321020,4sleep028767-21/usr/sbin/munin08:35:160
1192021020,4sleep011924-21ntp_states11:40:250
218092990,3sleep021830-21cat12:20:000
166782920,3sleep016642-21latency_hist12:00:030
315662890,3sleep031238-21/usr/sbin/munin08:45:270
158842887,66sleep015909-21memory07:45:200
135392876,67sleep0108-21systemd-journal11:45:420
76902860,2sleep07695-21modprobe09:20:010
270062850,2sleep027007-21modprobe12:40:000
39992817,61sleep04001-21irqstats11:10:200
52382805,62sleep05240-21/usr/sbin/munin09:10:110
225672787,59sleep022635-21sed10:15:280
597327318,32sleep05365-21/usr/sbin/munin07:05:310
248002710,3sleep024801-21/usr/sbin/munin10:25:160
656899628,17cyclictest32432-21/usr/sbin/munin10:55:360
656899618,19cyclictest20805-21/usr/sbin/munin10:10:130
6568996115,21cyclictest6309-21latency_hist11:20:020
6568996110,18cyclictest13058-21/usr/sbin/munin09:40:320
656899599,18cyclictest28577-21/usr/sbin/munin10:40:200
656899599,17cyclictest30407-21/usr/sbin/munin10:45:270
656899599,16cyclictest14199-21/usr/sbin/munin11:50:330
656899598,19cyclictest12147-21awk07:30:250
6568995933,15cyclictest15753-21/usr/sbin/munin09:50:160
656899589,17cyclictest21974-21/usr/sbin/munin12:20:190
656899588,13cyclictest18094-21/usr/sbin/munin12:05:310
6568995835,15cyclictest2768-21/usr/sbin/munin09:00:190
6568995834,15cyclictest7950-21munin-node07:15:110
6568995833,16cyclictest19668-21/usr/sbin/munin10:05:190
6568995820,13cyclictest27568-21sort08:30:240
656899579,15cyclictest20898-21/usr/sbin/munin08:05:140
656899579,15cyclictest19374-21/usr/sbin/munin12:10:290
656899578,18cyclictest19383-21cron10:05:010
656899578,17cyclictest9571-21ntp_states07:20:250
656899577,19cyclictest23267-21/usr/sbin/munin12:25:190
656899577,16cyclictest28132-21seq10:37:420
656899577,16cyclictest1543-21ntpq11:00:240
6568995710,18cyclictest23792-21ntp_states08:15:410
6568995710,15cyclictest31144-21/usr/sbin/munin10:50:160
656899569,16cyclictest10323-21/usr/sbin/munin11:35:320
656899569,14cyclictest2857-21ntp_states11:05:250
656899569,14cyclictest24545-21/usr/sbin/munin12:30:180
656899568,16cyclictest9138-21/usr/sbin/munin09:25:150
656899568,15cyclictest27236-21idleruntime-cro08:30:000
656899568,15cyclictest24844-21df08:20:150
656899567,17cyclictest17080-21ntp_states12:00:240
656899567,16cyclictest14516-21chrt07:40:180
6568995631,15cyclictest17417-21/usr/sbin/munin09:55:310
6568995621,14cyclictest14822-21switchtime09:45:260
6568995610,14cyclictest18649-21/usr/sbin/munin07:55:270
656899559,19cyclictest23464-21df10:20:150
656899559,18cyclictest13126-21/usr/sbin/munin07:35:160
656899559,17cyclictest1932-21/usr/sbin/munin08:55:300
656899559,15cyclictest10833-21ntpq07:25:210
656899558,15cyclictest7055-21/usr/sbin/munin11:20:310
656899558,15cyclictest11834-21ls09:35:150
656899557,16cyclictest7852-21/usr/sbin/munin09:20:160
6568995531,15cyclictest19651-21/usr/sbin/munin08:00:100
6568995530,16cyclictest22701-21/usr/sbin/munin08:10:290
656899548,15cyclictest7777-21sshd07:14:420
6568995430,15cyclictest10136-21runrttasks11:34:390
6568995410,17cyclictest474-21awk08:50:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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