You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-05-19 - 20:33

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 #1, slot #2

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 rack1slot2s.osadl.org (updated Tue May 19, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
749623626,0sleep30-21swapper/306:52:353
745423425,0sleep10-21swapper/106:52:051
736923423,0sleep00-21swapper/006:51:030
760323228,0sleep20-21swapper/206:53:462
35170,0ktimersoftd/30-21swapper/309:13:273
77959966,0cyclictest0-21swapper/109:10:281
4160,0ktimersoftd/00-21swapper/009:13:270
35160,0ktimersoftd/30-21swapper/311:10:593
339960,0migration/331960-21munin-node09:50:253
339960,0migration/329698-21sh09:07:503
339960,0migration/329043-21sh10:27:213
339960,0migration/328356-21taskset10:46:363
339960,0migration/311765-21sh12:19:583
29725060,0irq/27-eth0-tx-10914-21munin-node08:10:310
29715060,0irq/26-eth0-rx-9977-21aten2.4-expect07:45:223
29715060,0irq/26-eth0-rx-11305-21tr09:55:263
29715060,0irq/26-eth0-rx-0-21swapper/311:46:373
27160,0ktimersoftd/20-21swapper/209:13:272
149960,0migration/027937-21sh11:48:250
8215050,0irq/24-0000:00:18337-21latency_hist08:40:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional