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2026-09-20 - 17:55

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 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 100 highest latencies:
System rack3slot6s.osadl.org (updated Sun Sep 20, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177892111100,6sleep30-21swapper/307:06:203
18032211087,18sleep00-21swapper/007:09:250
16285210998,6sleep20-21swapper/207:05:062
17354210683,17sleep10-21swapper/107:05:541
124182850,0sleep00-21swapper/009:54:580
278852800,0sleep20-21swapper/208:51:032
144532760,0sleep00-21swapper/011:39:070
245672750,1sleep30-21swapper/311:50:013
165552720,0sleep30-21swapper/309:25:073
325552710,0sleep30-21swapper/311:57:503
205442700,1sleep1221ktimersoftd/112:20:011
186472700,0sleep10-21swapper/108:30:151
31312610,1sleep20-21swapper/209:45:102
18104993128,2cyclictest14845-21kworker/u8:110:08:042
18102992926,2cyclictest27817-21kworker/u8:011:53:040
18102992825,2cyclictest14845-21kworker/u8:110:10:040
18104992724,2cyclictest21163-21kworker/u8:210:44:012
18104992623,2cyclictest8269-21kworker/u8:012:09:042
18104992623,2cyclictest4466-21kworker/u8:209:19:042
18104992623,2cyclictest26280-21kworker/u8:009:42:052
18104992623,2cyclictest15242-21kworker/u8:112:16:042
18104992623,2cyclictest14845-21kworker/u8:110:02:042
18104992623,2cyclictest14845-21kworker/u8:109:50:052
18104992620,5cyclictest28597-21munin-node2
18104992522,2cyclictest8269-21kworker/u8:012:10:042
18104992522,2cyclictest26280-21kworker/u8:009:39:042
18104992421,2cyclictest7156-21kworker/u8:110:36:012
18104992421,2cyclictest6861-21kworker/u8:211:41:042
18104992421,2cyclictest4466-21kworker/u8:209:28:052
18104992421,2cyclictest32112-21kworker/u8:011:27:042
18104992421,2cyclictest13404-21kworker/u8:010:32:012
18102992421,2cyclictest21163-21kworker/u8:210:47:040
18104992320,2cyclictest28516-21kworker/u8:007:54:012
18104992320,2cyclictest22184-21kworker/u8:311:58:012
18104992320,2cyclictest22184-21kworker/u8:311:49:042
18104992319,2cyclictest30271-21kworker/u8:112:31:042
1810499230,18cyclictest0-21swapper/210:47:042
18102992320,2cyclictest26280-21kworker/u8:009:43:040
18102992320,2cyclictest22184-21kworker/u8:311:47:040
62482220,1sleep2301ktimersoftd/210:55:402
18104992219,2cyclictest7156-21kworker/u8:110:25:042
18104992219,2cyclictest7156-21kworker/u8:110:24:042
18104992219,2cyclictest31777-21kworker/u8:011:00:042
18104992219,2cyclictest26059-21kworker/u8:111:14:042
18104992219,2cyclictest26059-21kworker/u8:111:05:042
18104992219,2cyclictest15242-21kworker/u8:112:20:052
18102992219,2cyclictest24012-21kworker/u8:207:34:040
18102992219,2cyclictest14845-21kworker/u8:109:38:010
1810299220,18cyclictest0-21swapper/010:08:040
18104992118,2cyclictest32112-21kworker/u8:011:30:042
18104992118,2cyclictest29557-21kworker/u8:107:44:042
18104992118,2cyclictest26059-21kworker/u8:110:53:042
18104992118,2cyclictest12520-21kworker/u8:108:17:042
1810499210,18cyclictest0-21swapper/207:34:042
18102992118,2cyclictest6861-21kworker/u8:211:34:040
18102992118,2cyclictest4466-21kworker/u8:209:27:040
18102992118,2cyclictest13404-21kworker/u8:010:32:050
18104992017,2cyclictest28760-21kworker/u8:109:09:042
18104992017,2cyclictest17558-21kworker/u8:210:11:042
18102992017,2cyclictest8269-21kworker/u8:012:08:050
18102992017,2cyclictest26059-21kworker/u8:111:20:040
18102992017,2cyclictest22184-21kworker/u8:312:27:040
18102992017,2cyclictest17558-21kworker/u8:210:29:040
18104991916,2cyclictest26500-21kworker/u8:007:16:042
1810499190,2cyclictest0-21swapper/212:27:042
1810499190,2cyclictest0-21swapper/211:20:042
18102991916,2cyclictest23859-21kworker/u8:012:37:040
18102991916,2cyclictest15242-21kworker/u8:112:19:040
18102991916,2cyclictest14845-21kworker/u8:110:01:040
18102991916,2cyclictest13318-21kworker/u8:011:40:040
18104991815,2cyclictest8502-21kworker/u8:208:25:042
18104991815,2cyclictest28516-21kworker/u8:007:39:042
18104991815,2cyclictest26059-21kworker/u8:111:35:042
18104991815,2cyclictest22611-21kworker/u8:208:47:042
1810499180,5cyclictest0-21swapper/212:35:042
1810499180,2cyclictest0-21swapper/208:36:052
18102991815,2cyclictest22184-21kworker/u8:311:56:040
18102991815,2cyclictest18070-21kworker/u8:008:36:050
18102991815,2cyclictest14845-21kworker/u8:109:49:040
18102991815,2cyclictest12520-21kworker/u8:108:41:040
18104991714,2cyclictest5894-21kworker/u8:107:58:042
18104991714,2cyclictest29557-21kworker/u8:107:20:042
18102991714,2cyclictest8502-21kworker/u8:208:21:040
1810299170,16cyclictest0-21swapper/012:10:040
1810499160,13cyclictest0-21swapper/211:53:042
1810399161,3cyclictest2293-21munin-node1
1810399161,3cyclictest0-21swapper/108:40:161
1810399161,13cyclictest292062sleep109:37:551
1810399160,14cyclictest791-21awk09:05:151
18102991613,2cyclictest26059-21kworker/u8:110:54:050
18102991613,2cyclictest23859-21kworker/u8:012:24:040
18102991613,2cyclictest11219-21kworker/u8:211:06:040
1810299160,2cyclictest0-21swapper/009:19:040
1810299160,15cyclictest0-21swapper/011:27:040
18105991511,2cyclictest0-21swapper/311:14:073
1810599150,13cyclictest1994-21diskmemload11:35:153
18104991512,2cyclictest26106-21kworker/u8:009:01:042
1810399151,2cyclictest0-21swapper/109:41:351
1810399151,12cyclictest8248-21munin-node1
1810399151,12cyclictest4985-21ssh10:20:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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