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2026-07-02 - 10:06

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 Thu Jul 02, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279229552,39sleep20-21swapper/219:07:232
287429380,9sleep00-21swapper/019:08:260
267629063,9sleep30-21swapper/319:05:523
85728464,16sleep10-21swapper/119:05:101
238902580,0sleep30-21swapper/323:02:253
308999270,27cyclictest0-21swapper/221:28:222
308999260,26cyclictest0-21swapper/221:24:362
308499251,2cyclictest0-21swapper/022:42:270
3089992423,1cyclictest0-21swapper/223:23:432
308999240,24cyclictest0-21swapper/200:08:472
3089992322,1cyclictest0-21swapper/221:11:042
308999230,22cyclictest0-21swapper/221:46:222
308699231,3cyclictest0-21swapper/100:34:061
308499221,3cyclictest0-21swapper/020:10:130
308999211,20cyclictest0-21swapper/200:19:202
308999210,21cyclictest0-21swapper/200:25:542
308699210,2cyclictest0-21swapper/121:55:241
308499211,15cyclictest24291-21taskset21:45:200
308499210,1cyclictest0-21swapper/021:20:320
112112210,1sleep111215-21tr22:55:141
308999200,19cyclictest0-21swapper/222:28:122
308999200,19cyclictest0-21swapper/220:10:232
308999200,17cyclictest0-21swapper/219:10:132
3086992016,3cyclictest0-21swapper/121:20:411
308699201,1cyclictest28307-21diskmemload22:02:251
3089991912,6cyclictest24209-21apache_volume22:05:112
308999190,19cyclictest0-21swapper/222:00:332
308999180,18cyclictest0-21swapper/223:27:082
308999180,17cyclictest0-21swapper/222:36:382
3086991816,1cyclictest38150irq/131-snd_hda00:10:091
308699180,1cyclictest0-21swapper/123:05:491
308699180,18cyclictest0-21swapper/100:35:231
308499185,10cyclictest5213-21apt-get23:30:130
3084991817,1cyclictest0-21swapper/019:52:330
3084991815,2cyclictest13-21ksoftirqd/000:18:020
3091991712,4cyclictest6798-21grep21:15:273
308999171,15cyclictest27045-21irqstats21:05:172
308999170,17cyclictest0-21swapper/223:00:352
308999170,17cyclictest0-21swapper/222:17:122
308999170,16cyclictest0-21swapper/222:53:492
308699177,9cyclictest0-21swapper/123:15:121
308699170,1cyclictest0-21swapper/122:46:271
308699170,1cyclictest0-21swapper/121:48:461
308499177,9cyclictest27477-21apache222:45:230
3084991715,2cyclictest13-21ksoftirqd/023:04:380
3084991710,4cyclictest13-21ksoftirqd/022:55:010
308499170,11cyclictest0-21swapper/019:15:140
308499170,0cyclictest0-21swapper/023:18:380
309199160,3cyclictest0-21swapper/322:00:253
308999160,15cyclictest0-21swapper/222:42:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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