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2026-06-12 - 13:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 
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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Fri Jun 12, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
324852640,2sleep131810-21/usr/sbin/munin23:33:081
324852640,2sleep131810-21/usr/sbin/munin23:33:081
228312620,3chrt0-21swapper/000:33:120
228312620,3chrt0-21swapper/000:33:120
228312620,3chrt0-21swapper/000:33:120
6182550,8sleep0621-21needreboot22:08:080
6182550,8sleep0621-21needreboot22:08:080
6182550,8sleep0621-21needreboot22:08:080
32115995549,3cyclictest31264-21kworker/u10:1-nfsiod00:02:550
32115995549,3cyclictest31264-21kworker/u10:1-nfsiod00:02:550
32115995549,3cyclictest31264-21kworker/u10:1-nfsiod00:02:550
32123995140,5cyclictest0-21swapper/100:02:581
32123995140,5cyclictest0-21swapper/100:02:581
32123995140,5cyclictest0-21swapper/100:02:581
57612500,2sleep05764-21fschecks_count22:23:030
57612500,2sleep05764-21fschecks_count22:23:030
181282470,3sleep00-21swapper/000:22:590
181282470,3sleep00-21swapper/000:22:590
255872460,2chrt0-21swapper/021:48:060
255872460,2chrt0-21swapper/021:48:060
255872460,2chrt0-21swapper/021:48:060
244892460,2chrt0-21swapper/323:13:033
244892460,2chrt0-21swapper/323:13:033
32115994440,2cyclictest0-21swapper/000:03:110
32115994440,2cyclictest0-21swapper/000:03:110
32115994013,5cyclictest201rcuc/000:24:460
32115994013,5cyclictest201rcuc/000:24:460
246052380,2sleep024606-21switchtime20:18:130
246052380,2sleep024606-21switchtime20:18:130
153432380,2sleep115373-21readlink21:22:511
153432380,2sleep115373-21readlink21:22:511
32123993731,4cyclictest32091-21cyclictest20:43:051
32123993731,4cyclictest32091-21cyclictest20:43:051
3212399372,27cyclictest11677-21sed00:03:151
3212399372,27cyclictest11677-21sed00:03:151
201062370,3sleep00-21swapper/020:08:040
201062370,3sleep00-21swapper/020:08:040
201062370,3sleep00-21swapper/020:08:040
39282360,3sleep20-21swapper/223:43:132
39282360,3sleep20-21swapper/223:43:132
32115993630,4cyclictest572-21cups-browsed21:08:100
32115993630,4cyclictest572-21cups-browsed21:08:100
32115993630,4cyclictest201rcuc/023:36:340
32115993630,4cyclictest201rcuc/023:36:340
32115993620,4cyclictest90-1pr/ttyS023:12:160
32115993620,4cyclictest90-1pr/ttyS023:12:160
32115993617,5cyclictest201rcuc/023:54:030
32115993617,5cyclictest201rcuc/023:54:030
32115993617,5cyclictest201rcuc/023:54:030
38892350,2sleep13925-21proc_pri23:43:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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