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2026-07-21 - 08:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 here to display the system's profile data or here to proceed to next system.
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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot7s.osadl.org (updated Tue Jul 21, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4627210087,9sleep00-21swapper/019:07:500
355929043,42sleep30-21swapper/319:05:213
452928676,5sleep10-21swapper/119:06:341
466728471,9sleep20-21swapper/219:08:212
488699270,24cyclictest0-21swapper/223:43:272
4886992625,1cyclictest0-21swapper/222:27:432
4883992524,1cyclictest0-21swapper/121:19:171
488899242,20cyclictest31288-21kworker/3:223:27:423
488899241,22cyclictest0-21swapper/319:35:133
488899232,19cyclictest31288-21kworker/3:223:23:073
488699230,22cyclictest0-21swapper/200:22:222
488399230,23cyclictest0-21swapper/122:34:271
488399230,1cyclictest0-21swapper/100:16:101
488199231,5cyclictest12661-21df_inode22:35:160
488899221,19cyclictest9027-21kworker/3:000:39:153
488699223,11cyclictest31954-21apt-get21:30:132
488699210,17cyclictest0-21swapper/200:35:082
488899200,18cyclictest0-21swapper/321:43:323
488399200,1cyclictest0-21swapper/120:15:151
488199206,6cyclictest9617-21munin-run19:19:590
488699190,1cyclictest0-21swapper/223:47:122
488699190,1cyclictest0-21swapper/223:02:042
488699190,19cyclictest0-21swapper/222:55:002
488399190,19cyclictest0-21swapper/122:27:401
488199190,17cyclictest0-21swapper/021:22:300
4886991816,1cyclictest0-21swapper/221:54:302
488699180,18cyclictest0-21swapper/223:26:572
4883991814,3cyclictest38150irq/131-snd_hda23:05:281
488399180,18cyclictest0-21swapper/121:40:551
488399180,16cyclictest0-21swapper/121:28:091
488199186,7cyclictest401-21ssh23:45:140
488199180,2cyclictest0-21swapper/023:23:360
488199180,1cyclictest0-21swapper/023:16:410
4888991714,2cyclictest0-21swapper/300:16:483
488699173,10cyclictest9770-21forks23:50:182
488699170,1cyclictest141rcu_preempt21:19:482
488699170,17cyclictest0-21swapper/200:09:172
488699170,15cyclictest0-21swapper/222:05:102
488399175,10cyclictest0-21swapper/122:20:141
488399172,1cyclictest30102-21diskmemload22:42:171
4888991612,3cyclictest7960-21sshd21:35:143
4888991610,5cyclictest19699-21apache223:12:283
488199160,1cyclictest0-21swapper/000:22:210
4888991510,4cyclictest12838-21apache200:20:413
488699159,5cyclictest32-21ksoftirqd/220:50:132
488699153,11cyclictest30102-21diskmemload21:56:162
4886991513,1cyclictest0-21swapper/223:59:092
488699151,13cyclictest0-21swapper/221:13:502
488699151,13cyclictest0-21swapper/219:39:332
4886991511,2cyclictest0-21swapper/222:11:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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