You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-08-24 - 15:06

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 Mon Aug 24, 2026 00:44:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3029726995249,2cyclictest75-21kswapd000:35:033
3029722994843,3cyclictest75-21kswapd000:35:032
3029726994541,2cyclictest3164992-21apt-get21:20:133
3029713994542,2cyclictest3268890-21apt-get23:00:120
3029722994336,4cyclictest335557-21systemd-journal19:25:142
3029713994338,3cyclictest3347374-21apt-get00:15:120
3029713993936,2cyclictest3019701-21kworker/u8:2+flush-259:019:35:250
3029713993834,3cyclictest3102615-21apt-get20:20:110
3029713993732,4cyclictest3242622-21apt-get22:35:120
3029722993531,3cyclictest3029950-21apt-get19:10:102
3029715993529,4cyclictest3263221-21cat22:55:011
3029713993530,3cyclictest3133447-21gpgv20:50:010
3029726993428,4cyclictest3144113-21latency_hist21:00:003
3029715993429,3cyclictest3237445-21apt-get22:30:101
3029713993431,2cyclictest3242384-21kworker/u8:0+flush-259:023:10:230
3029713993428,4cyclictest3326707-21apt-get23:55:130
3029715993328,3cyclictest3055920-21apt-get19:35:121
3029713993325,5cyclictest3205275-21ntpq21:55:220
3029715993230,1cyclictest75-21kswapd000:35:021
3029713993228,3cyclictest3071295-21kworker/u8:4+flush-259:020:40:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional