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2025-12-12 - 08:28

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 Fri Dec 12, 2025 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2811382212264,54sleep30-21swapper/319:06:213
281134128956,10sleep20-21swapper/219:05:482
281165628554,10sleep10-21swapper/119:09:481
281162227552,6sleep00-21swapper/019:09:220
281180899279,13cyclictest0-21swapper/322:35:123
2811808992519,3cyclictest0-21swapper/321:10:283
2811808992420,2cyclictest0-21swapper/322:10:193
2811808992414,7cyclictest3222247-21turbostat00:05:003
32201092231,3sleep20-21swapper/200:01:462
30356312231,3sleep20-21swapper/222:07:292
281180899237,11cyclictest2997499-21chrt21:45:003
2811808992319,2cyclictest0-21swapper/320:05:003
32657132221,3sleep00-21swapper/000:30:270
281180899227,10cyclictest3003579-21taskset21:47:043
281180899226,13cyclictest0-21swapper/323:43:053
281180899225,11cyclictest3172661-21taskset23:33:523
281180899224,12cyclictest3141695-21taskset23:15:123
2811808992216,3cyclictest0-21swapper/323:24:523
2811808992215,2cyclictest0-21swapper/300:07:583
281180899221,15cyclictest2877816-21chrt20:10:123
281180899221,10cyclictest2980733-21chrt21:33:493
281180899220,15cyclictest3205214-21taskset23:53:523
281180899214,13cyclictest0-21swapper/321:15:213
281180899212,16cyclictest2817575-21chrt19:15:023
281180899212,12cyclictest3065826-21taskset22:25:253
2811808992118,1cyclictest0-21swapper/322:06:373
2811808992118,1cyclictest0-21swapper/300:32:323
2811808992117,2cyclictest0-21swapper/323:11:013
2811808992113,6cyclictest15950irq/132-ahci[0000:00:17.0]21:00:193
281180899211,15cyclictest0-21swapper/323:55:143
281180899211,12cyclictest31299882sleep323:05:223
30690222201,4sleep22941487-21diskmemload22:30:022
29801792201,6sleep10-21swapper/121:32:521
281180899208,1cyclictest0-21swapper/319:35:143
281180899207,9cyclictest3089699-21chrt22:40:203
281180899206,12cyclictest0-21swapper/323:46:583
281180899204,12cyclictest0-21swapper/320:50:173
281180899202,12cyclictest2981809-21taskset21:35:103
281180899202,11cyclictest2898852-21chrt20:28:363
2811808992017,1cyclictest0-21swapper/322:56:433
2811808992017,1cyclictest0-21swapper/322:52:533
2811808992016,2cyclictest0-21swapper/322:24:353
2811808992016,2cyclictest0-21swapper/321:05:243
2811808992016,2cyclictest0-21swapper/320:35:003
2811808992015,4cyclictest0-21swapper/323:00:213
2811808992015,3cyclictest0-21swapper/322:17:323
2811808992015,3cyclictest0-21swapper/300:38:303
281180899201,15cyclictest3230600-21chrt00:10:123
281180899201,14cyclictest2829968-21chrt19:25:123
281180899201,12cyclictest3258459-21taskset00:25:313
281180899194,13cyclictest0-21swapper/300:22:233
2811808991916,2cyclictest0-21swapper/321:22:423
2811808991916,1cyclictest0-21swapper/322:31:483
2811808991916,1cyclictest0-21swapper/319:50:133
2811808991915,2cyclictest0-21swapper/322:03:013
2811808991914,2cyclictest0-21swapper/321:52:283
2811808991912,4cyclictest31629072sleep323:26:033
281180899191,15cyclictest0-21swapper/323:35:183
281180899191,14cyclictest0-21swapper/300:16:423
32226102183,9sleep13222630-21apt-get00:05:141
31653402181,3sleep23165354-21ssh23:29:592
30507892181,8sleep13050795-21ssh22:16:061
281180899185,1cyclictest0-21swapper/319:20:243
281180899184,10cyclictest3013601-21chrt21:55:103
281180899182,10cyclictest2850423-21taskset19:40:313
2811808991815,1cyclictest0-21swapper/320:20:293
2811808991815,1cyclictest0-21swapper/320:16:453
2811808991814,2cyclictest0-21swapper/320:35:033
281180899181,13cyclictest2965925-21chrt21:25:073
281180899181,13cyclictest0-21swapper/319:45:113
281180899181,11cyclictest3100030-21taskset22:47:463
281180899180,14cyclictest0-21swapper/320:40:113
281180899180,13cyclictest0-21swapper/319:55:123
32118832171,4sleep12941487-21diskmemload23:56:361
30847902172,9sleep0802-21snmpd22:39:500
29574492171,3sleep20-21swapper/221:19:502
29417922171,4sleep22941487-21diskmemload21:10:082
28873842171,10sleep12887432-21ntpq20:15:201
281180899176,8cyclictest2837416-21chrt19:30:173
281180899176,2cyclictest0-21swapper/320:46:533
281180899171,4cyclictest0-21swapper/320:05:133
2811808991713,2cyclictest2816650-21taskset19:10:293
32674942161,3sleep12941487-21diskmemload00:32:351
31985212161,9sleep23198736-21hddtemp_smartct23:50:152
31723432161,10sleep03172356-21ssh23:33:220
31571632161,9sleep12941487-21diskmemload23:24:371
31389702160,10sleep12941487-21diskmemload23:11:141
30295312161,9sleep02941487-21diskmemload22:05:060
30007942161,8sleep13001701-21memory21:45:191
29554982161,2sleep10-21swapper/121:16:411
281180899168,4cyclictest2926153-21taskset20:55:133
31960102151,9sleep12941487-21diskmemload23:47:061
31236542151,9sleep22941487-21diskmemload23:02:092
31139352151,9sleep03113988-21gcc22:55:220
30758332151,7sleep12941487-21diskmemload22:33:091
30659962151,4sleep23066245-21users22:25:292
30656362151,10sleep03065697-21ssh22:25:230
29957762151,3sleep02995783-21ssh21:42:210
29744672151,9sleep22974699-21cat21:30:172
29645352152,5sleep02964547-21pool-udisksd21:23:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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