You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-01-09 - 07:30

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 Fri Jan 09, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
351780,0ktimersoftd/31709-21perf19:07:193
801323524,0sleep00-21swapper/019:03:070
830823425,0sleep20-21swapper/219:06:292
809023424,0sleep10-21swapper/119:04:001
84669965,0cyclictest8243-21sed21:07:432
84669960,0cyclictest0-21swapper/222:50:222
84659960,0cyclictest0-21swapper/121:32:431
35160,0ktimersoftd/30-21swapper/322:55:593
35160,0ktimersoftd/30-21swapper/300:32:573
339960,0migration/35506-21sh23:22:053
339960,0migration/34763-21sh23:38:033
339960,0migration/323846-21sh21:34:163
339960,0migration/322466-21sh23:50:433
339960,0migration/322037-21switchtime19:37:503
339960,0migration/320690-21sh23:28:313
339960,0migration/314108-21sh21:10:333
339960,0migration/312225-21fschecks_time22:27:423
29715060,0irq/26-eth0-rx-24653-21cut19:17:453
29715060,0irq/26-eth0-rx-20353-21cut21:52:453
29715060,0irq/26-eth0-rx-17081-21grep21:12:453
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional