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2026-05-22 - 03:44

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 May 22, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230392990,3sleep30-21swapper/321:07:333
230392990,3sleep30-21swapper/321:07:333
206682970,4chrt0-21swapper/322:27:363
206682970,4chrt0-21swapper/322:27:363
212642940,4chrt21268-21unixbench_multi19:32:550
57422920,2sleep20-21swapper/223:12:462
57422920,2sleep20-21swapper/223:12:462
253012660,2sleep30-21swapper/300:03:403
253012660,2sleep30-21swapper/300:03:403
253012660,2sleep30-21swapper/300:03:403
110432630,3sleep20-21swapper/223:27:452
110432630,3sleep20-21swapper/223:27:452
30612610,3sleep30-21swapper/321:37:563
30612610,3sleep30-21swapper/321:37:563
30612610,3sleep30-21swapper/321:37:563
95082600,3sleep09507-21cat21:57:420
95082600,3sleep09507-21cat21:57:420
95082600,3sleep09507-21cat21:57:420
182202590,3sleep2351rcuc/222:17:552
182202590,3sleep2351rcuc/222:17:552
182202590,3sleep2351rcuc/222:17:552
161632580,3chrt0-21swapper/322:12:533
161632580,3chrt0-21swapper/322:12:533
69932540,3sleep30-21swapper/320:22:463
69932540,3sleep30-21swapper/320:22:463
202372510,3sleep016118-21kworker/u9:3+xprtiod23:52:440
6122470,3sleep20-21swapper/220:07:382
6122470,3sleep20-21swapper/220:07:382
156832470,3sleep20-21swapper/223:37:542
156832470,3sleep20-21swapper/223:37:542
156832470,3sleep20-21swapper/223:37:542
156832470,3sleep20-21swapper/223:37:542
12682994742,3cyclictest0-21swapper/000:02:400
12682994742,3cyclictest0-21swapper/000:02:400
12682994742,3cyclictest0-21swapper/000:02:400
12682994742,3cyclictest0-21swapper/000:02:400
238962460,3sleep20-21swapper/200:02:432
238962460,3sleep20-21swapper/200:02:432
238962460,3sleep20-21swapper/200:02:432
238962460,3sleep20-21swapper/200:02:432
12682994131,7cyclictest0-21swapper/000:03:050
12682994131,7cyclictest0-21swapper/000:03:050
12682994131,7cyclictest0-21swapper/000:03:050
44212400,2chrt4423-21basename00:37:340
44212400,2chrt4423-21basename00:37:340
12683994035,3cyclictest28004-21kworker/u9:2-nfsiod00:02:341
12683994035,3cyclictest28004-21kworker/u9:2-nfsiod00:02:341
12683994035,3cyclictest28004-21kworker/u9:2-nfsiod00:02:341
12683994035,3cyclictest28004-21kworker/u9:2-nfsiod00:02:341
274592380,2sleep20-21swapper/200:12:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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