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2026-08-30 - 11:15

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 Sun Aug 30, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
892821530,3chrt0-21swapper/220:19:212
892821530,3chrt0-21swapper/220:19:212
2670721170,2sleep126710-21cut23:59:251
2670721170,2sleep126710-21cut23:59:251
248762970,3sleep20-21swapper/221:04:032
248762970,3sleep20-21swapper/221:04:032
183132670,2sleep118316-21awk22:09:271
183132670,2sleep118316-21awk22:09:271
163952640,2chrt0-21swapper/123:34:091
18602560,3sleep10-21swapper/122:54:171
18602560,3sleep10-21swapper/122:54:171
16796995324,23cyclictest27600-21cut00:04:090
16796995324,23cyclictest27600-21cut00:04:090
283192500,3sleep10-21swapper/119:44:221
256132500,3sleep10-21swapper/119:39:081
256132500,3sleep10-21swapper/119:39:081
166482490,3sleep20-21swapper/223:34:142
166482490,3sleep20-21swapper/223:34:142
186092450,2sleep00-21swapper/020:44:230
186092450,2sleep00-21swapper/020:44:230
16796994535,9cyclictest16794-21cyclictest21:04:030
16796994535,9cyclictest16794-21cyclictest21:04:030
282242440,2chrt28227-21sed22:39:091
306392410,2sleep10-21swapper/121:19:091
306392410,2sleep10-21swapper/121:19:091
33912400,2sleep20-21swapper/220:04:212
33912400,2sleep20-21swapper/220:04:212
16796993933,4cyclictest1346-21avahi-daemon20:24:020
16796993933,4cyclictest1346-21avahi-daemon20:24:020
237272380,2sleep1281ktimers/123:54:031
1680099381,26cyclictest27593-21chrt00:04:092
1680099381,26cyclictest27593-21chrt00:04:092
1679699382,27cyclictest27979-21fw_packets00:04:170
1679699382,27cyclictest27979-21fw_packets00:04:170
16799993730,5cyclictest572-21cups-browsed21:39:241
16799993730,5cyclictest572-21cups-browsed21:39:241
16796993629,5cyclictest8718-21latency_hist23:14:030
16799993529,4cyclictest31623-21cut19:54:161
88772340,3sleep10-21swapper/120:19:211
88772340,3sleep10-21swapper/120:19:211
279982340,3sleep00-21swapper/019:44:170
242462340,2sleep124247-21grep23:54:151
242462340,2sleep124247-21grep23:54:151
16799993427,5cyclictest4316-21threads22:59:251
16799993427,5cyclictest4316-21threads22:59:251
16796993424,7cyclictest3478-21fschecks_count22:59:160
16796993424,7cyclictest3478-21fschecks_count22:59:160
16799993328,3cyclictest623-21latency_hist00:19:021
16799993328,3cyclictest623-21latency_hist00:19:021
16799993326,5cyclictest3426-21needreboot00:24:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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