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2026-06-27 - 04:46

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 Sat Jun 27, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20501211694,16sleep30-21swapper/319:09:393
19604211486,20sleep20-21swapper/219:05:172
20509211189,16sleep10-21swapper/119:09:451
20488210786,16sleep00-21swapper/019:09:280
151832740,0sleep10-21swapper/123:43:271
327092730,0sleep10-21swapper/121:40:131
276292660,1sleep10-21swapper/122:10:141
2055699360,34cyclictest0-21swapper/022:55:100
2055999221,2cyclictest1125-21hwlatdetect21:00:143
2055999220,2cyclictest0-21swapper/321:25:153
2055999210,12cyclictest0-21swapper/320:00:143
2055799211,3cyclictest0-21swapper/123:52:201
2055799210,3cyclictest29946-21ssh23:24:071
2055799210,3cyclictest26369-21hwlatdetect23:55:151
2055799210,3cyclictest0-21swapper/123:35:571
2055799210,3cyclictest0-21swapper/122:40:151
2055799210,2cyclictest0-21swapper/121:52:071
2055799210,2cyclictest0-21swapper/121:05:131
2055799210,2cyclictest0-21swapper/100:28:221
20559992010,8cyclictest31048-21aten2.4_r3power20:55:123
2055999200,3cyclictest9188-21basename21:50:113
2055999200,3cyclictest8667-21munin-node3
2055999200,3cyclictest15497-21rm00:19:153
2055999200,3cyclictest0-21swapper/323:56:033
2055999200,3cyclictest0-21swapper/322:06:073
2055999200,3cyclictest0-21swapper/300:25:143
2055999200,3cyclictest0-21swapper/300:20:153
2055999200,2cyclictest0-21swapper/322:00:113
2055999200,18cyclictest0-21swapper/323:48:103
2055999200,18cyclictest0-21swapper/323:40:063
2055999200,18cyclictest0-21swapper/323:29:513
2055999200,12cyclictest0-21swapper/322:20:063
2055799201,3cyclictest0-21swapper/119:55:141
2055799200,3cyclictest7713-21ssh22:23:591
2055799200,3cyclictest5545-21ntp_states21:45:181
2055799200,3cyclictest3728-21runrttasks23:29:341
2055799200,3cyclictest3728-21runrttasks23:05:231
2055799200,3cyclictest3449-21sh22:19:511
2055799200,3cyclictest30646-21iostat00:35:151
2055799200,3cyclictest23176-21munin-node1
2055799200,3cyclictest18120-21ssh00:21:031
2055799200,3cyclictest15356-21smartctl20:15:151
2055799200,3cyclictest12368-21sh23:04:501
2055799200,3cyclictest0-21swapper/123:34:231
2055799200,3cyclictest0-21swapper/122:46:191
2055799200,3cyclictest0-21swapper/122:01:551
2055799200,2cyclictest0-21swapper/120:20:171
2055799200,18cyclictest29948-21cut20:50:171
171332200,0sleep00-21swapper/021:58:400
2055999190,3cyclictest8683-21rm23:35:543
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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