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2026-08-07 - 23:27

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 Fri Aug 07, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303329178,9sleep20-21swapper/207:05:382
303128969,9sleep00-21swapper/007:05:370
326628471,9sleep30-21swapper/307:08:403
308928366,13sleep10-21swapper/107:06:211
93152770,0sleep20-21swapper/209:17:132
301332600,0sleep00-21swapper/010:47:070
345599301,14cyclictest0-21swapper/009:55:120
346199280,27cyclictest0-21swapper/212:03:492
346399278,14cyclictest39-21ksoftirqd/307:35:143
346199260,26cyclictest0-21swapper/210:22:392
3463992421,3cyclictest39-21ksoftirqd/311:25:363
346199241,22cyclictest0-21swapper/209:10:142
346199240,20cyclictest0-21swapper/210:11:582
346199240,20cyclictest0-21swapper/210:11:572
3463992322,1cyclictest0-21swapper/309:24:013
3463992311,12cyclictest39-21ksoftirqd/309:55:143
3457992320,2cyclictest24228-21chrt10:24:561
345599234,15cyclictest6147-21munin-run12:10:010
3463992221,1cyclictest39-21ksoftirqd/310:30:183
3463992220,1cyclictest319272sleep311:45:493
3463992220,1cyclictest24103-21taskset12:39:553
3461992220,1cyclictest300372sleep211:25:242
3461992219,2cyclictest30630-21wc11:45:202
346199220,21cyclictest0-21swapper/209:34:472
3457992219,2cyclictest17348-21chrt09:21:571
345799220,22cyclictest0-21swapper/111:58:091
345799220,20cyclictest0-21swapper/110:45:561
345599224,17cyclictest0-21swapper/008:45:130
3463992119,1cyclictest17861-21head10:20:203
3463992118,2cyclictest6153-21basename12:10:003
3457992118,2cyclictest30336-21chrt10:09:011
3455992119,1cyclictest3406-21cut11:10:120
3455992119,1cyclictest276902sleep012:22:130
3455992118,2cyclictest20815-21chrt10:22:160
3463992018,1cyclictest31598-21apt10:10:003
346399201,18cyclictest14018-21ssh11:55:153
346199200,19cyclictest0-21swapper/212:10:022
345799202,18cyclictest17458-21ssh11:18:231
3457992019,1cyclictest0-21swapper/110:43:491
345799200,19cyclictest0-21swapper/110:34:421
3455992018,1cyclictest26701-21chrt11:04:540
3455992017,2cyclictest16046-21dnf10:00:170
346399196,11cyclictest0-21swapper/309:53:413
3463991917,1cyclictest0-21swapper/309:30:173
3463991913,5cyclictest28665-21diskmemload11:09:483
3463991911,5cyclictest0-21swapper/310:35:153
3461991918,1cyclictest0-21swapper/212:38:062
346199190,17cyclictest0-21swapper/209:59:442
345799192,16cyclictest19418-21apt-get08:50:131
345799190,18cyclictest0-21swapper/111:40:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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