You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-08-02 - 20:21

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 #1, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot3s.osadl.org (updated Sun Aug 02, 2026 12:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27398409919592,1949cyclictest1-21systemd08:08:535
57799211143,33mali-event-hand0-21swapper/207:09:092
273983599511,46cyclictest2822996-21sendmail10:20:180
273983599501,11cyclictest2892879-21latency_hist12:20:190
2739835994938,8cyclictest2901553-21cron12:35:180
2739835994924,12cyclictest2843383-21munin-run10:55:180
2739835994826,8cyclictest2837580-21munin-run10:45:180
273983599482,26cyclictest2787723-21apt-get09:20:190
2739835994721,12cyclictest2787723-21apt-get09:20:200
2739835994712,31cyclictest2773144-21cut08:45:190
2739836994636,8cyclictest2843362-21ssh10:55:181
2739835994633,10cyclictest2757372-21cut08:00:180
2739835994622,12cyclictest2767933-21cut08:30:190
2739835994622,12cyclictest2767933-21cut08:30:190
2739835994538,5cyclictest2808465-21munin-plugin-st09:55:180
2739839994435,7cyclictest2739834-21cyclictest12:39:464
2739839994433,9cyclictest2799736-21munin-run09:40:184
2739837994435,7cyclictest575-21rs:main2
2739837994435,7cyclictest575-21rs:main2
2739836994435,7cyclictest423-21systemd-timesyn11:15:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional