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2026-05-24 - 15:03

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Sun May 24, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2414621210,3chrt24144-21users09:50:290
118921210,5chrt1190-21latency_hist12:35:010
327542970,4sleep0329-21memory10:25:170
170802960,3sleep017100-21idleruntime-cro07:20:000
260352940,3sleep026123-21cat10:00:030
170562940,3sleep017053-21cat09:25:010
40642930,3sleep04062-21grep08:35:020
109422920,4sleep010974-21/usr/sbin/munin09:00:260
314662900,4sleep031472-21/usr/sbin/munin10:20:170
288492880,4sleep028880-21cpu08:05:110
147862866,10sleep014828-21memory07:10:160
94462850,3sleep09465-21grep11:00:230
278592830,3sleep027901-21proc_pri08:00:240
195952820,2sleep019639-21if_eth011:40:150
176572820,3sleep017655-21sendmail_mailst07:20:250
236812780,3sleep023683-21cpu07:45:100
323152778,14sleep0307-21munin-node08:17:290
1385427220,30sleep013926-21users07:05:250
228462660,3sleep022848-21awk07:40:260
14540996136,16cyclictest17194-21/usr/sbin/munin09:25:140
1454099609,17cyclictest22264-21munin-run07:40:010
14540996033,17cyclictest9521-21/usr/sbin/munin08:55:190
1454099599,19cyclictest2412-21munin-run12:40:010
1454099597,18cyclictest22270-21/usr/sbin/munin09:45:140
14540995934,16cyclictest4612-21/usr/sbin/munin08:35:260
14540995934,16cyclictest13526-21/usr/sbin/munin09:10:230
14540995933,16cyclictest17121-21/usr/sbin/munin11:30:190
14540995921,14cyclictest27654-21processes12:10:280
14540995911,18cyclictest1682-21ntpq10:30:190
14540995911,16cyclictest27096-21sshd10:03:170
14540995910,18cyclictest27437-21/usr/sbin/munin10:05:190
14540995910,16cyclictest30192-21memory10:15:170
1454099589,17cyclictest26442-21memory07:55:190
1454099589,16cyclictest20054-21/usr/sbin/munin07:30:190
14540995834,16cyclictest16055-21/usr/sbin/munin11:25:260
14540995834,15cyclictest29949-21/usr/sbin/munin12:20:140
14540995810,17cyclictest25409-21/usr/sbin/munin07:50:270
14540995810,17cyclictest15692-21munin-run09:20:010
287272573,5sleep00-21swapper12:15:200
1454099579,15cyclictest1605-21/usr/sbin/munin08:25:180
1454099578,16cyclictest1487-21modprobe08:25:010
1454099578,15cyclictest11931-21/usr/sbin/munin09:05:240
1454099577,18cyclictest23367-21/usr/sbin/munin11:55:280
14540995732,16cyclictest26025-21runrttasks12:05:120
14540995732,16cyclictest10665-21/usr/sbin/munin11:05:190
14540995731,16cyclictest14438-21/usr/sbin/munin11:20:150
1454099568,17cyclictest11751-21/usr/sbin/munin11:10:140
1454099567,16cyclictest6906-21irqstats08:45:160
1454099566,16cyclictest20989-21/usr/sbin/munin09:40:130
14540995632,16cyclictest18966-21/usr/sbin/munin07:25:270
14540995630,17cyclictest8606-21runrttasks10:56:330
14540995630,16cyclictest30743-21runrttasks08:10:310
14540995630,16cyclictest25370-21runrttasks12:01:070
14540995610,17cyclictest8188-21irqstats08:50:150
1454099559,15cyclictest22167-21/usr/sbin/munin11:50:150
14540995531,16cyclictest7491-21runrttasks10:52:570
14540995531,16cyclictest13654-21runrttasks11:15:330
14540995531,15cyclictest3539-21runrttasks10:37:190
14540995531,15cyclictest29779-21sshd10:14:170
14540995530,16cyclictest5567-21/usr/sbin/munin10:45:210
14540995510,16cyclictest18989-21users09:30:290
14540995510,15cyclictest18533-21/usr/sbin/munin11:35:230
1454099548,14cyclictest20802-21/usr/sbin/munin11:45:200
14540995432,15cyclictest31818-21runrttasks12:26:070
1454099539,15cyclictest5736-21ntpq08:40:190
14540995310,19cyclictest19733-21df09:35:120
1454099528,17cyclictest4021-21/usr/sbin/munin10:40:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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