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2026-01-07 - 15:18

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 100 highest latencies:
System rack1slot6s.osadl.org (updated Wed Jan 07, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28466999231,9cyclictest1287-21snmpd11:48:000
28466999123,61cyclictest0-21swapper/008:26:380
28466998421,12cyclictest0-21swapper/007:41:100
28466998015,10cyclictest0-21swapper/010:04:370
28466998015,10cyclictest0-21swapper/010:04:370
28466997919,21cyclictest0-21swapper/009:31:290
28471996534,8cyclictest5144-21grep11:31:352
2847199633,52cyclictest0-21swapper/207:36:102
19032634,52sleep30-21swapper/310:21:043
28472996118,24cyclictest25376-21timerwakeupswit11:06:343
2847199613,50cyclictest0-21swapper/211:06:182
248599610,4rtkit-daemon2484-21rtkit-daemon11:54:523
2847199603,50cyclictest0-21swapper/211:56:002
28471995918,23cyclictest0-21swapper/211:21:322
28472995837,11cyclictest24647-21crond12:15:593
2847199583,47cyclictest4974-21sendmail_mailqu07:01:412
194222580,4sleep119421-21unixbench_multi12:01:331
2847199573,48cyclictest0-21swapper/212:01:172
28471995728,10cyclictest8279-21telnet09:26:172
28469995739,13cyclictest0-21swapper/108:41:421
28469995739,13cyclictest0-21swapper/108:41:421
248599570,6rtkit-daemon2484-21rtkit-daemon11:41:153
2847299565,34cyclictest0-21swapper/306:55:263
2847299565,31cyclictest0-21swapper/308:41:383
2847299565,31cyclictest0-21swapper/308:41:383
2847299565,29cyclictest0-21swapper/311:31:343
2847299564,32cyclictest0-21swapper/309:21:223
2847299564,32cyclictest0-21swapper/309:21:223
28472995620,15cyclictest0-21swapper/309:56:363
28472995613,23cyclictest26264-21head07:46:353
28471995640,9cyclictest28295-21grep07:51:312
28471995616,12cyclictest0-21swapper/210:41:042
2846999565,44cyclictest0-21swapper/110:11:191
2846999564,44cyclictest0-21swapper/107:21:121
2846999564,44cyclictest0-21swapper/107:21:121
2846999564,30cyclictest0-21swapper/111:26:191
2846999564,30cyclictest0-21swapper/111:26:191
28469995624,14cyclictest0-21swapper/111:46:011
248599560,5rtkit-daemon2484-21rtkit-daemon10:26:473
44672553,7sleep24471-21idleruntime-cro08:11:092
2847299554,30cyclictest0-21swapper/308:36:273
28472995522,13cyclictest0-21swapper/308:01:453
28472995517,22cyclictest1419-21runrttasks10:11:173
2847199553,46cyclictest31995-21munin-run08:01:092
2847199553,46cyclictest31995-21munin-run08:01:092
28469995520,12cyclictest0-21swapper/111:16:271
28469995517,15cyclictest0-21swapper/108:56:191
2847299546,28cyclictest0-21swapper/308:26:193
2847299545,28cyclictest0-21swapper/310:31:173
2847299545,28cyclictest0-21swapper/309:51:243
2847299544,30cyclictest0-21swapper/311:11:123
2847299544,28cyclictest0-21swapper/311:56:243
2847299544,27cyclictest0-21swapper/307:26:123
28472995435,10cyclictest21974-21unixbench_multi07:36:443
28472995423,13cyclictest0-21swapper/307:31:323
28472995422,12cyclictest0-21swapper/306:46:273
28472995420,14cyclictest0-21swapper/311:51:003
28472995420,14cyclictest0-21swapper/311:01:223
2847199543,45cyclictest0-21swapper/207:21:272
28469995424,12cyclictest0-21swapper/111:06:201
28469995424,10cyclictest2025-21cat08:06:101
28469995421,13cyclictest0-21swapper/111:56:291
248599540,5rtkit-daemon2484-21rtkit-daemon10:01:183
248599540,5rtkit-daemon2484-21rtkit-daemon10:01:183
2847299536,27cyclictest0-21swapper/307:11:233
2847299536,27cyclictest0-21swapper/307:11:233
2847299535,28cyclictest0-21swapper/310:21:313
2847299535,28cyclictest0-21swapper/309:04:123
2847299535,28cyclictest0-21swapper/308:31:363
2847299535,27cyclictest0-21swapper/310:41:093
2847299535,27cyclictest0-21swapper/310:41:093
2847299535,27cyclictest0-21swapper/308:11:383
2847299535,26cyclictest0-21swapper/311:26:113
2847299535,26cyclictest0-21swapper/311:26:113
2847299534,29cyclictest0-21swapper/310:56:163
2847299534,28cyclictest0-21swapper/311:36:173
28472995320,13cyclictest0-21swapper/308:56:333
28472995320,13cyclictest0-21swapper/307:56:393
28472995320,13cyclictest0-21swapper/307:56:393
28471995319,13cyclictest0-21swapper/208:16:442
28469995327,8cyclictest6731-21head09:21:241
28469995327,8cyclictest6731-21head09:21:241
28469995323,13cyclictest0-21swapper/109:40:531
28469995321,11cyclictest24977-21munin-node10:01:191
28469995321,11cyclictest24977-21munin-node10:01:191
248599530,5rtkit-daemon2484-21rtkit-daemon07:41:312
220142532,9sleep20-21swapper/209:51:452
307902522,9sleep20-21swapper/206:50:402
2847299525,28cyclictest0-21swapper/307:01:383
2847299525,27cyclictest0-21swapper/309:11:333
2847299525,27cyclictest0-21swapper/308:46:443
2847299525,27cyclictest0-21swapper/307:41:293
2847299525,27cyclictest0-21swapper/307:16:233
2847299525,27cyclictest0-21swapper/307:16:233
2847299525,26cyclictest0-21swapper/312:06:103
2847299525,26cyclictest0-21swapper/312:06:103
2847299524,28cyclictest0-21swapper/311:16:203
2847299524,27cyclictest0-21swapper/312:01:313
2847299524,26cyclictest0-21swapper/308:56:093
28472995221,13cyclictest0-21swapper/309:41:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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