You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-05-16 - 13:57

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 #3, 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
  TQ-Systems
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 rack3slot3s.osadl.org (updated Sat May 16, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
307310021230,5sleep03069523-21kworker/u16:1-writeback0
307310021230,5sleep03069523-21kworker/u16:1-writeback0
2846909212152,62sleep30-21swapper/33
284726528872,10sleep20-21swapper/22
284723928664,12sleep10-21swapper/11
284724328458,6sleep00-21swapper/00
284773499249,9cyclictest3004217-21taskset3
2847734992317,4cyclictest0-21swapper/33
33049342222,8sleep23305033-21ntpq2
2847734992118,2cyclictest0-21swapper/33
2847734992111,6cyclictest66950irq/132-enp1s0-TxRx-33
284773499211,16cyclictest3232960-21taskset3
284773499211,14cyclictest0-21swapper/33
31312252201,8sleep03131236-21ssh0
2847734992017,1cyclictest0-21swapper/33
284773499201,15cyclictest0-21swapper/33
284773499201,13cyclictest0-21swapper/33
32206712191,6sleep03220732-21ntpq0
284773499199,6cyclictest2881841-21turbostat3
284773499191,7cyclictest3209764-21taskset3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional