You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-08 - 13:55

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 Wed Apr 08, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2242086997369,2cyclictest75-21kswapd019:50:020
2242092994738,3cyclictest2182904-21kworker/u8:1+events_unbound19:35:222
2242096993832,4cyclictest2182904-21kworker/u8:1+flush-259:021:05:013
2242092993834,3cyclictest2247255-21kworker/u8:0+events_unbound19:20:152
2242088993833,3cyclictest252-21systemd-journal19:55:501
2242096993630,4cyclictest2475042-21kworker/u8:3+flush-259:023:05:183
2242092993632,3cyclictest2433986-21kworker/u8:2+events_unbound22:35:242
2242092993532,2cyclictest2371721-21kworker/u8:3+flush-259:022:05:242
2242092993532,2cyclictest2371721-21kworker/u8:3+flush-259:021:35:242
2242092993531,3cyclictest2182904-21kworker/u8:1+events_unbound20:25:252
2242092993430,3cyclictest2465500-21kworker/u8:2+events_unbound22:45:212
2242092993330,2cyclictest2443994-21kworker/u8:1+events_unbound22:55:202
2242092993329,3cyclictest2443994-21kworker/u8:1+flush-259:022:30:142
2242092993329,3cyclictest2443994-21kworker/u8:1+flush-259:022:30:142
2242092993328,4cyclictest2305099-21apt-get20:10:112
2242092993328,4cyclictest2305099-21apt-get20:10:112
2242092993228,3cyclictest2485519-21kworker/u8:2+flush-259:023:15:162
2242092993228,3cyclictest2444536-21apt-get22:25:132
2242096993127,3cyclictest2521603-21kworker/u8:0+flush-259:000:35:253
2242088993125,4cyclictest2584019-21latency_hist00:40:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional