You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-12-03 - 15:10

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 Wed Dec 03, 2025 12:43:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2486575212855,68sleep30-21swapper/307:09:403
272189621160,3sleep1321rcuc/110:20:171
248627228861,17sleep10-21swapper/107:05:501
248652828451,9sleep20-21swapper/207:09:062
248629627855,6sleep00-21swapper/007:06:090
2486723992911,13cyclictest2878049-21chrt12:05:263
248672399261,21cyclictest2687723-21chrt09:57:583
248672399261,19cyclictest2546653-21taskset08:01:303
2486723992521,2cyclictest0-21swapper/312:10:593
29165332241,10sleep02615851-21diskmemload12:30:490
2486723992420,2cyclictest0-21swapper/311:05:003
28866702230,4sleep22615851-21diskmemload12:11:552
248672399232,13cyclictest2725726-21taskset10:25:033
248672399231,9cyclictest2901616-21taskset12:21:213
2486723992319,2cyclictest0-21swapper/307:39:343
2486723992317,3cyclictest0-21swapper/311:20:193
248672399230,17cyclictest2746049-21taskset10:36:223
248672399228,12cyclictest0-21swapper/311:40:193
248672399228,12cyclictest0-21swapper/311:40:193
248672399222,14cyclictest2724921-21taskset10:23:513
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional