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2026-09-05 - 17:08

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 Sat Sep 05, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
940922510,3sleep09410-21/usr/sbin/munin10:25:160
2274822400,2sleep022747-21cut09:10:260
920121400,4chrt9202-21latency_hist10:25:020
539321330,3chrt5395-21cpu10:10:150
561821310,3chrt5206-21/usr/sbin/munin12:15:270
2763221300,3chrt27627-21ntp_states11:35:220
3190421230,2sleep031905-21cat09:45:290
158921190,3chrt1590-21latency_hist07:50:020
2980321160,3chrt29805-21modprobe11:45:000
579021130,3sleep05789-21tr08:05:220
2277821120,2sleep022777-21awk11:15:310
3027521020,3sleep030278-21df07:35:120
135482960,4sleep013553-21ntp_states08:35:230
52192910,3sleep05221-21sh10:09:590
79312886,10sleep07948-21irqstats12:25:150
281602850,4sleep028234-21grep07:25:290
28082850,4sleep02880-21date07:55:010
251732774,60sleep025227-21mailstats11:25:250
2247827720,31sleep022530-21df07:05:130
203762697,52sleep0288-21snmpd11:07:150
262272670,2sleep026230-21latency11:30:180
2367199637,22cyclictest2271-21sshd12:03:030
23671996217,13cyclictest5500-21latency_hist08:05:010
23671996135,17cyclictest31530-21/usr/sbin/munin11:50:240
2367199597,17cyclictest12169-21memory08:30:210
23671995935,16cyclictest30415-21/usr/sbin/munin11:45:270
23671995935,15cyclictest21262-21/usr/sbin/munin09:05:190
23671995915,13cyclictest15680-21/usr/sbin/munin10:50:200
41362580,2sleep04137-21/usr/sbin/munin12:10:220
2367199589,17cyclictest26202-21/usr/sbin/munin09:25:280
2367199589,15cyclictest25351-21ntp_states07:15:230
2367199588,16cyclictest26374-21/usr/sbin/munin07:20:240
23671995834,15cyclictest23684-21/usr/sbin/munin11:20:180
23671995834,15cyclictest12445-21runrttasks10:35:510
23671995833,16cyclictest2861-21/usr/sbin/munin10:00:160
23671995833,16cyclictest25190-21/usr/sbin/munin09:20:190
23671995815,14cyclictest111702chrt10:30:540
23671995811,14cyclictest10515-21awk12:35:170
23671995810,15cyclictest29391-21systemctl07:30:270
2367199579,16cyclictest15849-21/usr/sbin/munin08:45:260
2367199578,15cyclictest1524-21df09:55:140
2367199577,17cyclictest18415-21/usr/sbin/munin08:55:120
2367199577,16cyclictest28763-21/usr/sbin/munin09:35:270
2367199576,17cyclictest2643-21/usr/sbin/munin12:05:280
23671995734,15cyclictest7071-21/usr/sbin/munin10:15:260
23671995733,15cyclictest27570-21/usr/sbin/munin09:30:160
23671995732,17cyclictest24425-21runrttasks09:17:160
23671995732,16cyclictest7053-21/usr/sbin/munin08:10:180
2367199569,15cyclictest2926-21/usr/sbin/munin07:55:250
2367199568,16cyclictest19793-21seq09:00:150
2367199568,15cyclictest288-21snmpd10:58:250
2367199567,15cyclictest479-21ntp_states09:50:280
23671995633,15cyclictest9754-21/usr/sbin/munin08:20:250
23671995633,15cyclictest11710-21runrttasks08:28:550
23671995632,16cyclictest17421-21/usr/sbin/munin08:50:220
23671995632,15cyclictest336-21/usr/sbin/munin11:55:230
23671995619,15cyclictest13108-21/usr/sbin/munin10:40:160
23671995612,15cyclictest14441-21df10:45:130
2367199556,17cyclictest9279-21tr08:20:000
23671995533,14cyclictest20888-21/usr/sbin/munin11:10:120
23671995532,15cyclictest30300-21/usr/sbin/munin09:40:190
23671995530,16cyclictest7443-21runrttasks12:23:040
23671995530,16cyclictest23852-21/usr/sbin/munin07:10:160
23671995530,15cyclictest31679-21/usr/sbin/munin07:40:170
2367199548,16cyclictest14570-21/usr/sbin/munin08:40:210
23671995428,17cyclictest18267-21/usr/sbin/munin11:00:090
2367199538,15cyclictest10249-21munin-run12:35:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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