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2026-04-15 - 18:49

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 Wed Apr 15, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1862621320,3chrt18623-21grep11:47:211
1862621320,3chrt18623-21grep11:47:211
2492521030,9sleep1281ktimers/109:12:161
2492521030,9sleep1281ktimers/109:12:161
260122910,2chrt25857-21latency_hist09:17:050
260122910,2chrt25857-21latency_hist09:17:050
8812890,3sleep30-21swapper/311:02:123
8812890,3sleep30-21swapper/311:02:123
212682830,1sleep10-21swapper/111:57:091
212682830,1sleep10-21swapper/111:57:091
285622810,3sleep10-21swapper/109:22:131
285622810,3sleep10-21swapper/109:22:131
285622810,3sleep10-21swapper/109:22:131
119572800,4sleep20-21swapper/211:32:102
119572800,4sleep20-21swapper/211:32:102
52962760,3sleep30-21swapper/309:47:113
11362720,3sleep30-21swapper/308:07:213
11362720,3sleep30-21swapper/308:07:213
204682620,2sleep30-21swapper/311:52:213
204682620,2sleep30-21swapper/311:52:213
277622610,3sleep30-21swapper/309:21:583
277622610,3sleep30-21swapper/309:21:583
176202600,2sleep10-21swapper/108:52:191
176202600,2sleep10-21swapper/108:52:191
261932550,4chrt0-21swapper/109:17:101
261932550,4chrt0-21swapper/109:17:101
302862530,1chrt0-21swapper/112:21:581
302862530,1chrt0-21swapper/112:21:581
302862530,1chrt0-21swapper/112:21:581
230442530,3chrt23048-21ntp_kernel_pll_09:07:160
312792480,3chrt0-21swapper/112:22:181
312792480,3chrt0-21swapper/112:22:181
213612480,4sleep20-21swapper/211:57:112
213612480,4sleep20-21swapper/211:57:112
205682430,2sleep00-21swapper/010:27:160
205682430,2sleep00-21swapper/010:27:160
174932430,2sleep117377-21/usr/sbin/munin11:47:101
174932430,2sleep117377-21/usr/sbin/munin11:47:101
49822410,3sleep00-21swapper/012:37:200
49822410,3sleep00-21swapper/012:37:200
49822410,3sleep00-21swapper/012:37:200
274272410,2chrt27422-21needreboot12:12:131
143942400,2sleep10-21swapper/111:37:161
143942400,2sleep10-21swapper/111:37:161
124922400,3sleep30-21swapper/310:07:093
124922400,3sleep30-21swapper/310:07:093
117662400,1sleep111827-21awk08:37:151
117662400,1sleep111827-21awk08:37:151
168112390,3sleep30-21swapper/310:17:143
168112390,3sleep30-21swapper/310:17:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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