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2026-08-20 - 08:04

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 Aug 20, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
294429659,10sleep30-21swapper/319:09:543
280228876,8sleep00-21swapper/019:08:020
281828359,13sleep10-21swapper/119:08:151
83028168,9sleep20-21swapper/219:05:192
304699300,29cyclictest0-21swapper/223:28:172
304699300,29cyclictest0-21swapper/222:03:422
304699300,23cyclictest1690-21sh22:50:142
304299300,28cyclictest0-21swapper/120:55:191
3039992929,0cyclictest0-21swapper/023:45:340
304699283,24cyclictest0-21swapper/200:10:402
304699280,27cyclictest0-21swapper/223:11:332
304699280,21cyclictest0-21swapper/221:55:142
303999282,2cyclictest22956-21munin-run00:20:000
303999280,0cyclictest0-21swapper/022:35:150
304699271,20cyclictest22954-21perf00:19:592
304699270,26cyclictest0-21swapper/222:31:002
304699270,26cyclictest0-21swapper/200:00:162
303999271,2cyclictest2400-21ssh22:50:170
303999271,16cyclictest0-21swapper/000:20:130
304699260,26cyclictest0-21swapper/222:48:232
304699260,25cyclictest0-21swapper/223:07:212
304699260,25cyclictest0-21swapper/222:25:122
304299260,23cyclictest0-21swapper/121:36:401
303999261,24cyclictest0-21swapper/023:15:150
303999260,25cyclictest0-21swapper/023:35:130
303999260,1cyclictest0-21swapper/022:25:120
303999260,1cyclictest0-21swapper/021:28:570
303999260,1cyclictest0-21swapper/020:00:150
304699255,19cyclictest12170-21tune2fs23:15:152
304699250,22cyclictest0-21swapper/222:35:152
3039992522,2cyclictest0-21swapper/023:41:260
303999251,23cyclictest0-21swapper/022:15:130
303999250,3cyclictest0-21swapper/022:55:140
303999250,3cyclictest0-21swapper/000:10:340
303999250,2cyclictest0-21swapper/000:29:070
304699247,13cyclictest0-21swapper/221:51:032
304699240,23cyclictest0-21swapper/223:57:472
304699240,19cyclictest0-21swapper/219:35:132
304699240,18cyclictest9118-21ssh00:30:222
303999243,19cyclictest28058-21diskmemload22:06:170
303999241,1cyclictest28058-21diskmemload21:51:020
304699231,21cyclictest28058-21diskmemload00:27:452
304699231,21cyclictest0-21swapper/221:25:592
304699231,13cyclictest18484-21apt-get23:00:132
304699230,21cyclictest25411-21latency_hist22:45:002
303999232,18cyclictest23119-21ssh21:45:130
303999230,4cyclictest28058-21diskmemload23:59:570
303999230,2cyclictest0-21swapper/019:40:110
303999230,1cyclictest0-21swapper/023:00:130
303999230,1cyclictest0-21swapper/000:30:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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