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2026-08-02 - 21:19

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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 rack1slot6s.osadl.org (updated Sun Aug 02, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14019910751,14cyclictest0-21swapper/011:04:470
2228921010,8chrt22291-21cat10:28:160
140499985,78cyclictest0-21swapper/311:19:213
140499973,67cyclictest0-21swapper/310:22:513
140499925,64cyclictest7767-21timerwakeupswit10:03:503
140499924,68cyclictest0-21swapper/308:48:453
140499924,13cyclictest0-21swapper/310:18:163
1404999218,49cyclictest14727-21sendmail_mailst11:03:433
1404999214,55cyclictest0-21swapper/310:02:533
1404999210,60cyclictest9706-21cpuspeed_turbos10:08:313
140499904,66cyclictest0-21swapper/309:22:183
140499904,62cyclictest0-21swapper/311:02:083
140499904,62cyclictest0-21swapper/308:17:243
1404999018,48cyclictest0-21swapper/310:51:373
140499897,58cyclictest15314-21munin-node09:28:503
140499894,60cyclictest0-21swapper/307:48:553
140499894,58cyclictest26233-21iostat_ios09:43:403
140499894,12cyclictest0-21swapper/308:58:403
140499884,61cyclictest0-21swapper/309:41:343
140499884,61cyclictest0-21swapper/308:34:323
140499884,61cyclictest0-21swapper/308:34:323
140499884,60cyclictest0-21swapper/310:30:123
140499884,60cyclictest0-21swapper/309:07:153
140499884,59cyclictest0-21swapper/309:51:453
140499884,59cyclictest0-21swapper/309:51:453
140499884,12cyclictest0-21swapper/310:33:503
140499884,12cyclictest0-21swapper/310:33:503
140499884,12cyclictest0-21swapper/308:28:383
140499884,10cyclictest0-21swapper/307:21:593
140499883,10cyclictest2429-21sed08:18:473
140499874,60cyclictest0-21swapper/309:55:193
140499874,59cyclictest0-21swapper/308:44:503
140499874,59cyclictest0-21swapper/306:38:343
140499874,11cyclictest0-21swapper/310:53:473
140499873,13cyclictest0-21swapper/309:08:343
140499873,10cyclictest5711-21cat08:23:443
140499864,58cyclictest0-21swapper/306:43:353
140499864,13cyclictest0-21swapper/308:56:573
140499864,12cyclictest0-21swapper/306:18:503
140499864,11cyclictest0-21swapper/311:38:053
140499863,9cyclictest24678-21seq06:53:573
140499863,9cyclictest20130-21http_loadtime10:23:363
140499863,56cyclictest32270-21taskset11:31:213
140499863,12cyclictest0-21swapper/308:08:413
140499854,66cyclictest0-21swapper/310:39:043
140499854,65cyclictest0-21swapper/309:15:053
140499854,58cyclictest0-21swapper/311:14:033
140499853,9cyclictest12555-21sed09:23:343
140499853,58cyclictest20494-21ssh09:33:563
140499853,58cyclictest14827-21munin-node07:43:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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