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2025-12-17 - 23:05

OSADL QA Farm on Real-time of Mainline Linux

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

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot3s.osadl.org (updated Wed Dec 17, 2025 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
154559321270,3sleep2574-21rs:main2
1299925212051,64sleep30-21swapper/307:08:283
13090842970,2sleep1321rcuc/107:15:151
129987228164,10sleep10-21swapper/107:07:501
130003027953,20sleep00-21swapper/007:09:500
129969427559,10sleep20-21swapper/207:05:352
1300167993226,3cyclictest1598632-21sleep11:50:003
1300167992219,1cyclictest0-21swapper/312:20:243
130016799213,11cyclictest1324105-21taskset07:30:123
1300167992118,1cyclictest0-21swapper/309:32:573
15254902201,8sleep01525751-21kthreadcore10:40:150
130016799202,11cyclictest1482205-21taskset09:58:163
1300167992017,1cyclictest0-21swapper/311:21:573
1300167992017,1cyclictest0-21swapper/308:55:173
1300167992017,1cyclictest0-21swapper/308:45:203
1300167992017,1cyclictest0-21swapper/308:35:153
1300167992017,1cyclictest0-21swapper/307:25:223
1300167992016,2cyclictest0-21swapper/310:05:013
130016799195,12cyclictest0-21swapper/309:07:103
130016799195,10cyclictest1524687-21turbostat10:40:003
130016799194,6cyclictest0-21swapper/309:40:113
130016799193,12cyclictest1493146-21taskset10:10:113
130016799193,10cyclictest1582397-21taskset11:33:443
1300167991916,1cyclictest0-21swapper/312:03:573
1300167991916,1cyclictest0-21swapper/309:53:573
1300167991916,1cyclictest0-21swapper/308:00:163
1300167991916,1cyclictest0-21swapper/307:51:573
1300167991916,1cyclictest0-21swapper/307:40:143
1300167991916,1cyclictest0-21swapper/307:35:573
1300167991915,2cyclictest0-21swapper/308:33:103
130016799191,15cyclictest1624708-21taskset12:10:273
130016799191,13cyclictest0-21swapper/311:15:123
130016799190,12cyclictest1540256-21chrt10:53:323
16101842180,7sleep01611634-21tr12:00:150
130016799185,9cyclictest1361036-21chrt08:05:113
130016799185,2cyclictest0-21swapper/310:08:523
130016799184,10cyclictest1302883-21chrt07:10:163
1300167991815,1cyclictest0-21swapper/311:55:113
1300167991815,1cyclictest0-21swapper/311:35:283
1300167991815,1cyclictest0-21swapper/311:25:153
1300167991815,1cyclictest0-21swapper/310:29:343
1300167991815,1cyclictest0-21swapper/309:26:573
1300167991815,1cyclictest0-21swapper/309:26:573
1300167991815,1cyclictest0-21swapper/308:51:573
1300167991814,2cyclictest0-21swapper/307:20:003
130016799181,14cyclictest0-21swapper/310:30:113
130016799181,14cyclictest0-21swapper/310:30:113
130016799181,13cyclictest1508864-21taskset10:24:503
130016799181,13cyclictest0-21swapper/312:30:183
130016799181,13cyclictest0-21swapper/311:10:103
130016799181,13cyclictest0-21swapper/307:55:203
130016799181,10cyclictest1369402-21taskset08:10:163
130016799180,14cyclictest1555993-21taskset11:09:513
130016799180,14cyclictest1439659-21taskset09:16:133
15549592170,1sleep20-21swapper/211:05:182
130016799176,1cyclictest0-21swapper/310:55:173
130016799174,9cyclictest1344725-21turbostat07:50:003
130016799172,9cyclictest1387146-21taskset08:29:313
1300167991714,1cyclictest0-21swapper/311:50:193
1300167991714,1cyclictest0-21swapper/308:20:183
1300167991714,1cyclictest0-21swapper/308:20:183
1300167991714,1cyclictest0-21swapper/307:20:193
1300167991713,2cyclictest0-21swapper/312:26:303
1300167991713,2cyclictest0-21swapper/310:45:093
1300167991713,1cyclictest0-21swapper/311:00:193
1300167991712,3cyclictest541ktimers/312:15:173
130016799170,13cyclictest0-21swapper/311:40:183
130016799161,9cyclictest1524946-21taskset10:40:053
130016799161,9cyclictest1466892-21taskset09:45:063
130016799161,13cyclictest0-21swapper/309:00:123
130016799161,10cyclictest1618794-21taskset12:05:183
1300167991610,2cyclictest0-21swapper/309:20:123
130016799160,13cyclictest0-21swapper/312:35:173
130016799160,13cyclictest0-21swapper/310:15:133
130016799160,13cyclictest0-21swapper/308:15:183
16404892151,4sleep11640647-21sed12:25:251
15463862151,8sleep01546627-21kthreadcore11:00:150
15149882153,8sleep21515022-21kthreadcore10:30:152
15149882153,8sleep21515022-21kthreadcore10:30:152
130016799151,9cyclictest1433747-21taskset09:10:203
130016799150,12cyclictest0-21swapper/308:40:253
15455822141,9sleep11545591-21cron11:00:001
15077822141,3sleep21507871-21ntpq10:20:172
14603432141,2sleep10-21swapper/109:35:201
14288502141,9sleep21429087-21/usr/sbin/munin09:05:272
13053412141,8sleep21305678-21irqstats07:15:012
1300167991411,2cyclictest0-21swapper/309:35:113
15931312131,8sleep11593578-21apt-get11:45:011
15202142131,7sleep01520482-21kthreadcore10:35:140
15092022131,8sleep21509420-21df_inode10:25:102
14510612130,1sleep00-21swapper/009:30:140
13705292131,8sleep21370576-21sort08:10:242
15833302121,7sleep21584562-21kthreadcore11:35:162
14925352120,1sleep10-21swapper/110:05:541
14302852125,3sleep21430504-21kthreadcore09:10:162
13558882121,5sleep11356011-21diskstats08:00:131
13402892121,3sleep21340788-21cut07:45:152
13288592121,7sleep21328946-21latency_hist07:35:012
13135332121,7sleep01314491-21kthreadcore07:20:160
16469952110,1sleep10-21swapper/112:35:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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