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2026-06-08 - 00:57

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 Sun Jun 07, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1048922510,2sleep010488-21sort11:20:280
1986522370,3sleep019863-21grep07:45:270
1404521070,2sleep014046-21cpu09:30:100
2032621030,3sleep020316-21latency_hist09:55:010
881221000,3sleep08810-21ls11:15:180
239852990,4sleep024037-21cat12:10:010
284372970,2sleep028439-21tr12:25:270
308452920,3sleep030920-21wc08:30:020
1058528910,67sleep010643-21ls09:15:280
155282880,2sleep015552-21idleruntime07:30:140
90002860,2sleep08997-21cat09:10:170
50102830,3sleep05053-21if_eth008:55:150
915327822,32sleep09186-21memory07:05:170
171942760,3sleep017261-21threads07:35:270
257952744,57sleep025382-21/usr/sbin/munin12:15:270
162202680,2sleep016221-21sh11:40:000
10196996234,18cyclictest0-21swapper10:00:110
10196996135,16cyclictest30842-21/usr/sbin/munin10:35:140
10196996135,16cyclictest16654-21/usr/sbin/munin11:40:200
1019699609,18cyclictest6075-21/usr/sbin/munin11:05:290
1019699608,18cyclictest3656-21/usr/sbin/munin08:50:140
10196996038,13cyclictest18653-21users07:40:300
10196996029,19cyclictest11838-21/usr/sbin/munin11:25:290
1019699598,16cyclictest20438-21/usr/sbin/munin09:55:170
10196995933,17cyclictest32507-21/usr/sbin/munin08:35:190
10196995922,13cyclictest25784-21latency10:15:170
10196995910,20cyclictest27117-21seq10:20:190
10196995910,18cyclictest26049-21/usr/sbin/munin08:10:200
1019699589,17cyclictest12761-21munin-run07:20:000
1019699589,15cyclictest7403-21df11:10:120
1019699588,18cyclictest30955-21/usr/sbin/munin08:30:270
10196995833,16cyclictest15389-21/usr/sbin/munin09:35:150
1019699579,15cyclictest28207-21/usr/sbin/munin10:25:140
1019699579,14cyclictest30008-21sshd12:31:370
1019699578,14cyclictest30546-21/usr/sbin/munin12:35:150
10196995734,15cyclictest17653-21/usr/sbin/munin11:45:110
10196995734,14cyclictest1349-21/usr/sbin/munin08:40:190
10196995732,17cyclictest32342-21/usr/sbin/munin10:40:190
10196995731,15cyclictest20733-21/usr/sbin/munin11:55:270
10196995730,16cyclictest13043-21/usr/sbin/munin07:20:160
10196995726,22cyclictest14277-21runrttasks07:25:140
10196995714,15cyclictest4786-21grep11:00:100
10196995711,33cyclictest27863-21munin-run12:25:000
1019699569,16cyclictest23393-21sed08:00:170
1019699569,14cyclictest14062-21ntp_states11:30:220
1019699568,18cyclictest24398-21sh12:10:240
1019699568,14cyclictest2704-21/usr/sbin/munin10:50:270
1019699567,17cyclictest16855-21awk09:40:190
1019699567,14cyclictest6246-21/usr/sbin/munin09:00:180
10196995634,13cyclictest27334-21/usr/sbin/munin08:15:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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