You are here: Home / Technical Services / OSADL QA Farm Real-time / 
2026-04-23 - 23:39

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 #c, slot #7

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 rackcslot7s.osadl.org (updated Thu Apr 23, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
353896521120,3sleep13056-21PK-Backend07:25:121
360170021090,5sleep13601696-21munin-run10:25:011
355203921020,3sleep10-21swapper/108:00:201
139099920,73rtkit-daemon0-21swapper/007:05:050
353252427340,26sleep30-21swapper/307:08:153
353159427144,19sleep20-21swapper/207:05:162
353169926745,14sleep10-21swapper/107:05:181
35508912390,4sleep03550875-21munin-run08:00:000
35930822350,2sleep30-21swapper/310:00:003
35930822350,2sleep30-21swapper/310:00:003
36117212280,4chrt0-21swapper/110:50:191
35579452270,7sleep0131ksoftirqd/008:20:010
3532809992714,5cyclictest26-21ksoftirqd/110:00:301
139099250,3rtkit-daemon1389-21rtkit-daemon07:36:560
3532817992410,4cyclictest34-21ksoftirqd/209:21:422
353281799238,13cyclictest3545399-21cron07:45:012
353281799237,4cyclictest34-21ksoftirqd/208:20:552
3532817992321,1cyclictest0-21swapper/210:04:082
3532817992321,1cyclictest0-21swapper/208:43:042
3532817992312,3cyclictest141rcu_preempt08:35:032
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional