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2025-11-08 - 22:42

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
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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 Sat Nov 08, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2230991060,6rtkit-daemon0-21swapper/105:46:141
2230991010,5rtkit-daemon18-21rcuc/105:32:221
223099970,6rtkit-daemon27465-21if_eth005:55:061
223099970,6rtkit-daemon0-21swapper/107:07:401
223099970,6rtkit-daemon0-21swapper/106:21:571
2035199974,27cyclictest0-21swapper/005:25:150
2035199974,27cyclictest0-21swapper/005:25:150
223099960,5rtkit-daemon8281-21smartctl05:15:071
223099950,6rtkit-daemon0-21swapper/108:32:151
223099950,6rtkit-daemon0-21swapper/105:41:211
223099940,6rtkit-daemon0-21swapper/108:01:081
223099940,6rtkit-daemon0-21swapper/107:25:471
223099940,6rtkit-daemon0-21swapper/106:12:281
223099940,6rtkit-daemon0-21swapper/106:12:281
223099940,6rtkit-daemon0-21swapper/105:53:131
223099940,6rtkit-daemon0-21swapper/105:22:451
223099940,6rtkit-daemon0-21swapper/104:54:161
223099930,6rtkit-daemon0-21swapper/108:39:591
223099930,6rtkit-daemon0-21swapper/107:48:311
223099930,6rtkit-daemon0-21swapper/107:16:031
223099930,6rtkit-daemon0-21swapper/107:04:411
223099930,6rtkit-daemon0-21swapper/106:44:111
223099930,6rtkit-daemon0-21swapper/105:07:151
223099930,5rtkit-daemon20603-21ps07:55:091
223099930,5rtkit-daemon20346-21cyclictest05:13:221
2035199934,28cyclictest0-21swapper/007:55:040
223099920,6rtkit-daemon0-21swapper/105:35:141
2035199894,35cyclictest0-21swapper/009:58:300
2035199894,26cyclictest0-21swapper/006:00:100
20351998921,12cyclictest0-21swapper/006:09:420
223099880,31rtkit-daemon20346-21cyclictest06:24:571
2035199884,26cyclictest0-21swapper/007:23:030
20351998819,13cyclictest0-21swapper/007:24:540
2035199875,27cyclictest0-21swapper/009:00:050
2035199874,25cyclictest0-21swapper/005:52:480
2035199864,27cyclictest0-21swapper/006:55:060
2035199844,27cyclictest0-21swapper/006:44:550
2035199844,12cyclictest0-21swapper/005:20:100
223099830,28rtkit-daemon0-21swapper/007:29:551
223099830,28rtkit-daemon0-21swapper/007:29:551
20354998331,45cyclictest0-21swapper/206:00:052
2035199834,27cyclictest0-21swapper/006:42:560
2035199834,14cyclictest0-21swapper/006:50:040
2035199834,14cyclictest0-21swapper/006:50:040
2035199834,11cyclictest0-21swapper/010:03:310
2035199833,24cyclictest27051-21grep04:45:190
2035199833,24cyclictest27051-21grep04:45:190
223099820,27rtkit-daemon0-21swapper/008:45:071
20354998237,37cyclictest28653-21fschecks_time08:14:562
20354998237,37cyclictest28653-21fschecks_time08:14:562
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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