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2026-06-05 - 21:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack3slot6s.osadl.org (updated Fri Jun 05, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19765211896,16sleep30-21swapper/307:09:233
19765211896,16sleep30-21swapper/307:09:233
19633211497,12sleep10-21swapper/107:07:411
19633211497,12sleep10-21swapper/107:07:401
190422114103,6sleep00-21swapper/007:05:270
190422114103,6sleep00-21swapper/007:05:270
191852112100,6sleep20-21swapper/207:06:012
191852112100,6sleep20-21swapper/207:06:012
127802770,0sleep00-21swapper/010:59:570
116012770,2sleep337-21rcuc/310:25:003
3022740,0sleep30-21swapper/310:12:583
43962570,0sleep30-21swapper/312:31:593
1984599220,2cyclictest0-21swapper/309:11:513
171242220,0sleep10-21swapper/109:23:221
1984599211,3cyclictest10342-21ssh09:15:543
1984599211,2cyclictest7007-21ssh09:45:573
1984599210,3cyclictest21847-21cut10:35:153
1984599210,3cyclictest15636-21users09:21:033
1984599210,3cyclictest0-21swapper/311:35:193
1984599210,3cyclictest0-21swapper/311:08:223
1984599210,3cyclictest0-21swapper/310:50:193
1984599210,19cyclictest0-21swapper/311:28:033
197582210,1sleep337-21rcuc/311:40:163
1984599201,3cyclictest0-21swapper/307:55:093
1984599200,3cyclictest8900-21perl10:55:153
1984599200,3cyclictest822-21ssh10:46:313
1984599200,3cyclictest6416-21ssh10:19:433
1984599200,3cyclictest13763-21hddtemp_smartct11:00:153
1984599200,3cyclictest0-21swapper/311:45:153
1984599200,3cyclictest0-21swapper/311:18:273
1984599200,3cyclictest0-21swapper/310:40:153
1984599200,3cyclictest0-21swapper/307:30:113
1984599200,3cyclictest0-21swapper/307:20:153
1984599200,3cyclictest0-21swapper/307:11:033
1984599200,18cyclictest0-21swapper/309:32:023
1984599191,16cyclictest0-21swapper/312:20:373
1984599190,3cyclictest19623-21apt-get10:00:073
1984599190,3cyclictest18619-21seq10:31:113
1984599190,3cyclictest1687-21sh09:40:313
1984599190,3cyclictest10028-21ssh12:38:233
1984599190,3cyclictest0-21swapper/311:13:033
1984599190,3cyclictest0-21swapper/308:45:153
1984599190,3cyclictest0-21swapper/307:25:153
1984599190,2cyclictest9399-21ssh12:03:583
1984599190,2cyclictest27231-21ssh10:06:473
1984599190,2cyclictest0-21swapper/311:51:553
1984599190,2cyclictest0-21swapper/311:30:423
1984599190,2cyclictest0-21swapper/309:57:433
1984599190,2cyclictest0-21swapper/309:25:033
1984599190,18cyclictest0-21swapper/312:18:423
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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