You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-19 - 03:46

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 #7, 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.
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 rack7slot4s.osadl.org (updated Sun Apr 19, 2026 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
243299663,54cyclictest28440-21ssh21:50:110
243299556,45cyclictest23355-21ssh23:35:140
243299556,45cyclictest23355-21ssh23:35:130
243299533,38cyclictest12454-21ssh22:35:120
244099482,37cyclictest15808-21ssh00:25:141
243299481,35cyclictest3403-21ssh22:30:110
243299472,37cyclictest26854-21ssh22:25:110
243299471,38cyclictest30078-21ssh21:15:120
243299452,34cyclictest32092-21ssh22:10:110
243299450,40cyclictest14789-21apt-get20:30:130
243299450,40cyclictest1356-21ssh21:35:120
244099441,32cyclictest1346-21ssh21:35:131
2457994224,15cyclictest35966irq/58-eth023:40:123
243299421,36cyclictest21416-21apt-get22:40:100
2449994118,17cyclictest261rcuc/220:35:142
244099411,32cyclictest15658-21ssh21:25:131
243299412,35cyclictest2607-21apt-get19:10:120
243299412,35cyclictest2607-21apt-get19:10:120
243299401,32cyclictest0-21swapper/020:20:120
243299391,34cyclictest0-21swapper/000:00:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional