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2026-06-09 - 13:42

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 Tue Jun 09, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1786621050,3sleep20-21swapper/220:32:582
306632930,2sleep20-21swapper/223:58:092
306632930,2sleep20-21swapper/223:58:092
223182870,2sleep20-21swapper/223:37:592
223182870,2sleep20-21swapper/223:37:592
223182870,2sleep20-21swapper/223:37:592
4662860,3sleep20-21swapper/222:38:052
4662860,3sleep20-21swapper/222:38:052
94962810,3chrt0-21swapper/223:03:012
94962810,3chrt0-21swapper/223:03:012
94962810,3chrt0-21swapper/223:03:012
102552760,3sleep20-21swapper/221:38:042
102552760,3sleep20-21swapper/221:38:042
208742670,3sleep10-21swapper/122:07:531
208742670,3sleep10-21swapper/122:07:531
58732630,2sleep00-21swapper/019:58:150
171812590,3chrt0-21swapper/120:28:111
171812590,3chrt0-21swapper/120:28:111
224662550,2chrt22467-21/usr/sbin/munin20:43:100
224662550,2chrt22467-21/usr/sbin/munin20:43:100
141932550,2sleep30-21swapper/321:48:053
141932550,2sleep30-21swapper/321:48:053
42912530,3chrt0-21swapper/322:48:073
42912530,3chrt0-21swapper/322:48:073
223992510,2sleep20-21swapper/219:18:012
2041399492,41cyclictest749-21runrttasks00:02:591
2041399492,41cyclictest749-21runrttasks00:02:591
2041399492,41cyclictest749-21runrttasks00:02:591
84492480,2sleep20-21swapper/200:27:522
84492480,2sleep20-21swapper/200:27:522
20412994839,5cyclictest0-21swapper/000:02:530
20412994839,5cyclictest0-21swapper/000:02:530
20412994720,3cyclictest0-21swapper/022:32:480
20412994720,3cyclictest0-21swapper/022:32:480
115032470,2sleep20-21swapper/220:13:132
115032470,2sleep20-21swapper/220:13:132
7702460,4sleep1774-21latency_hist19:47:511
7702460,4sleep1774-21latency_hist19:47:511
46162460,2sleep30-21swapper/300:17:483
46162460,2sleep30-21swapper/300:17:483
46162460,2sleep30-21swapper/300:17:483
156742460,2sleep20-21swapper/221:53:022
156742460,2sleep20-21swapper/221:53:022
7962450,3sleep20-21swapper/219:47:522
7962450,3sleep20-21swapper/219:47:522
20412994422,20cyclictest21135-21cut22:07:590
20412994422,20cyclictest21135-21cut22:07:590
200722440,3sleep30-21swapper/320:38:023
200722440,3sleep30-21swapper/320:38:023
20412994219,2cyclictest0-21swapper/021:38:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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