You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-20 - 08:55

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 Apr 20, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3047091995146,3cyclictest3248696-21gpgv22:25:012
3047086994844,3cyclictest3166159-21kworker/u8:2+flush-259:022:10:001
3047083994541,3cyclictest3331544-21kworker/u8:1+flush-259:000:15:170
3047083994541,3cyclictest3331544-21kworker/u8:1+flush-259:000:15:160
3047091994337,4cyclictest3367790-21latency_hist00:20:012
3047091994337,4cyclictest3367790-21latency_hist00:20:002
3047083994339,3cyclictest3062484-21kworker/u8:3+flush-259:020:40:170
3047083994135,4cyclictest3316299-21diskstats23:30:130
3047096994035,4cyclictest3099155-21/usr/sbin/munin20:00:163
3047083993831,5cyclictest3248487-21apt-get22:25:010
3047086993732,3cyclictest3161287-21apt-get21:00:141
304708399370,35cyclictest1-21systemd19:24:530
3047083993630,4cyclictest3098915-21latency_hist20:00:000
3047083993530,3cyclictest3197041-21kworker/u8:0+flush-259:022:30:180
3047091993429,4cyclictest3274696-21latency_hist22:50:022
3047086993429,4cyclictest3176487-21kworker/u8:3+flush-259:021:40:171
3047083993430,3cyclictest3166159-21kworker/u8:2+flush-259:021:45:180
3047083993429,3cyclictest252-21systemd-journal19:54:530
3047091993330,2cyclictest3166159-21kworker/u8:2+flush-259:023:05:172
3047086993327,4cyclictest3140442-21latency_hist20:40:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional