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2025-12-07 - 00:58

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 Sat Dec 06, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6924722171117,50sleep30-21swapper/307:07:103
69234428651,10sleep20-21swapper/207:05:332
68772127962,10sleep10-21swapper/107:05:041
69266027563,6sleep00-21swapper/007:09:360
11356062291,3sleep20-21swapper/212:29:262
9067442271,5sleep10-21swapper/110:05:131
692812992614,4cyclictest8675952sleep309:40:013
69281299261,3cyclictest0-21swapper/309:47:543
69281299261,2cyclictest0-21swapper/311:47:583
69281299261,2cyclictest0-21swapper/309:51:323
69281299260,2cyclictest0-21swapper/312:09:483
69281299260,2cyclictest0-21swapper/312:09:483
69281299251,2cyclictest0-21swapper/311:40:553
69281299251,2cyclictest0-21swapper/311:28:593
69281299251,19cyclictest1116904-21taskset12:16:513
69281299251,15cyclictest66550irq/131-enp1s0-TxRx-310:18:273
69281299250,2cyclictest0-21swapper/309:35:493
69281299241,3cyclictest0-21swapper/309:12:573
69281299241,11cyclictest0-21swapper/310:35:133
69281299240,2cyclictest0-21swapper/312:28:223
9752732231,8sleep1975282-21ssh10:50:111
9146962231,18sleep2914906-21hddtemp_smartct10:10:152
69281299235,15cyclictest15950irq/132-ahci[0000:00:17.0]08:36:473
69281299231,2cyclictest0-21swapper/309:59:223
9583562221,15sleep0958369-21sshd10:36:430
8503062221,3sleep1821854-21diskmemload09:26:201
8503062221,3sleep1821854-21diskmemload09:26:201
69281299229,8cyclictest898729-21sleep10:04:553
692812992219,1cyclictest0-21swapper/312:25:003
69281299221,16cyclictest816599-21sleep09:05:013
69281299221,11cyclictest0-21swapper/310:20:123
69281299221,10cyclictest920352-21taskset10:12:433
11510272221,3sleep00-21swapper/012:37:190
10771812221,4sleep00-21swapper/011:55:120
8990212211,3sleep20-21swapper/210:00:092
8899522211,2sleep20-21swapper/209:53:272
69281299219,3cyclictest0-21swapper/311:24:323
69281299212,14cyclictest996915-21taskset11:02:423
69281299212,14cyclictest988114-21taskset10:55:493
69281299212,13cyclictest951079-21taskset10:31:483
692812992118,1cyclictest0-21swapper/307:39:233
692812992115,3cyclictest0-21swapper/311:58:403
692812992111,8cyclictest0-21swapper/311:51:323
69281299211,16cyclictest800770-21turbostat08:50:003
69281299211,16cyclictest0-21swapper/312:30:143
69281299211,16cyclictest0-21swapper/312:00:163
69281299211,16cyclictest0-21swapper/310:45:113
69281299211,16cyclictest0-21swapper/309:10:003
69281299211,15cyclictest795268-21taskset08:41:363
69281299211,15cyclictest0-21swapper/311:15:123
69281299211,15cyclictest0-21swapper/311:15:123
69281299211,14cyclictest1041729-21taskset11:30:253
69281299211,13cyclictest937584-21taskset10:25:063
9881052201,3sleep20-21swapper/210:55:492
69281299205,12cyclictest774169-21turbostat08:29:553
69281299202,13cyclictest857093-21taskset09:30:343
69281299201,3cyclictest0-21swapper/311:13:013
69281299201,3cyclictest0-21swapper/309:28:223
69281299201,3cyclictest0-21swapper/309:28:223
692812992012,5cyclictest1006049-21turbostat11:10:003
69281299201,15cyclictest0-21swapper/312:10:113
69281299201,15cyclictest0-21swapper/309:15:133
69281299201,13cyclictest735818-21chrt07:45:173
69281299201,13cyclictest1152891-21taskset12:39:563
69281299200,1cyclictest0-21swapper/310:52:343
9826322191,5sleep0821854-21diskmemload10:54:510
9439292191,2sleep20-21swapper/210:27:592
9288972191,4sleep1821854-21diskmemload10:19:241
69281299191,15cyclictest0-21swapper/310:40:143
69281299191,15cyclictest0-21swapper/309:20:123
69281299191,14cyclictest0-21swapper/310:05:133
69281299191,12cyclictest705101-21taskset07:15:313
69281299191,12cyclictest1049240-21taskset11:35:263
69281299191,11cyclictest767568-21taskset08:15:193
11333612191,5sleep1821854-21diskmemload12:26:121
8739822181,3sleep10-21swapper/109:42:401
692812991815,1cyclictest0-21swapper/308:55:183
69281299181,4cyclictest742587-21sleep07:55:003
69281299180,11cyclictest692983-21taskset07:10:063
11195082182,10sleep11119534-21apt-get12:20:111
11008622181,2sleep00-21swapper/012:08:070
11008622181,2sleep00-21swapper/012:08:070
10192042180,7sleep20-21swapper/211:15:582
10192042180,7sleep20-21swapper/211:15:572
9881352171,3sleep10-21swapper/110:55:521
8993562171,7sleep0899410-21tune2fs10:00:150
8578192170,3sleep20-21swapper/209:31:502
8276192171,4sleep1821854-21diskmemload09:11:291
69281299171,12cyclictest753641-21chrt08:05:133
69281299171,12cyclictest710821-21sleep07:25:003
69281299171,11cyclictest779955-21chrt08:30:023
69281299171,11cyclictest718952-21taskset07:30:183
69281299170,13cyclictest0-21swapper/308:20:203
11189972171,2sleep1821854-21diskmemload12:19:521
10597902171,4sleep1821854-21diskmemload11:43:591
10501742171,4sleep2821854-21diskmemload11:36:342
100573021710,3sleep1821854-21diskmemload11:09:311
10043712171,3sleep20-21swapper/211:07:032
9970022161,10sleep0821854-21diskmemload11:02:530
9654062161,10sleep0965419-21rm10:40:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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