You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-06-19 - 01:12

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

Default latency plot of shadow in rack #e, slot #4

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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  
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: 100 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 rackeslot4s.osadl.org (updated Thu Jun 18, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2724936994641,4cyclictest2947699-21kworker/u8:3+flush-259:012:35:000
2724936994540,3cyclictest2989713-21apt-get11:25:100
2724936994538,5cyclictest2911236-21latency_hist10:10:010
2724936994338,3cyclictest3057586-21kworker/u8:2+flush-259:012:40:000
2724940994235,4cyclictest2797493-21latency_hist08:20:001
2724940993831,5cyclictest3015667-21ntpq11:45:211
2724936993834,3cyclictest3021975-21apt-get11:55:100
2724949993631,3cyclictest2777143-21apt-get08:00:113
2724936993528,5cyclictest2782057-21latency_hist08:05:000
2724940993430,2cyclictest3032118-21kworker/u8:0+flush-259:012:15:141
2724936993429,3cyclictest2719990-21kworker/u8:2+flush-259:007:20:010
2724940993328,3cyclictest335557-21systemd-journal08:59:051
2724936993329,3cyclictest2761618-21apt-get07:45:110
2724940993227,3cyclictest2854817-21kworker/u8:6+flush-259:009:40:171
2724940993226,4cyclictest2771935-21/usr/sbin/munin07:55:151
2724936993224,6cyclictest3046761-21ntpq12:15:230
2724940993026,3cyclictest2854279-21gpgv09:15:001
2724936993027,2cyclictest2761377-21kworker/u8:2+flush-259:008:05:240
2724936993026,2cyclictest2906305-21kworker/u8:1+flush-259:010:55:200
2724949992921,6cyclictest335557-21systemd-journal10:20:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional