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2026-06-09 - 07:07

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 here to display the system's profile data or here to proceed to next system.
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 20 highest latencies:
System rack4slot6s.osadl.org (updated Tue Jun 09, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39022590,3sleep0389-21tr23:30:180
832122560,2sleep08322-21mailstats00:00:260
1253821370,2sleep012539-21cut20:05:290
1895821260,3chrt18959-21uptime22:35:270
949521180,3chrt9493-21irqstats22:00:160
2785521170,4chrt27853-21sendmail_mailtr23:10:270
1811721150,4chrt18114-21cat00:40:010
3076421140,3chrt30762-21users21:15:280
846521100,2sleep08468-21ntp_kernel_err19:50:200
2249221000,5sleep022517-21idleruntime20:45:150
1609021000,3sleep016091-21cat20:20:130
160062800,3sleep016004-21grep22:25:180
2954327720,30sleep029629-21/usr/sbin/munin19:05:270
280392760,4sleep028106-21/usr/sbin/munin21:05:270
30246997034,26cyclictest25469-21/usr/sbin/munin20:55:260
3024699618,17cyclictest2718-21/usr/sbin/munin23:40:270
30246996136,15cyclictest9975-21/usr/sbin/munin19:55:310
30246996034,16cyclictest9396-21/usr/sbin/munin00:05:210
30246996021,11cyclictest0-21swapper22:10:300
30246996010,18cyclictest28691-21/usr/sbin/munin23:15:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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