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2025-08-30 - 01:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Fri Aug 29, 2025 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
227152119108,6sleep10-21swapper/107:08:091
22556210897,6sleep20-21swapper/207:06:052
22083210883,18sleep00-21swapper/007:05:230
22795210796,6sleep30-21swapper/307:09:113
440621050,1sleep24405-21ssh11:50:572
120152750,0sleep00-21swapper/009:47:060
158142700,0sleep00-21swapper/010:56:400
301762690,0sleep00-21swapper/012:17:420
228862650,1sleep30-21swapper/311:37:043
22894995417,19cyclictest0-21swapper/312:35:143
22892993415,2cyclictest0-21swapper/110:30:121
22892993015,13cyclictest0-21swapper/112:00:121
2289399288,18cyclictest29-21rcuc/210:40:112
2289399241,18cyclictest0-21swapper/207:38:042
306222220,1sleep30-21swapper/308:45:243
2289299220,20cyclictest0-21swapper/109:45:131
2289399212,2cyclictest0-21swapper/211:18:052
2289399212,17cyclictest29-21rcuc/211:24:022
22893992118,2cyclictest5210-21kworker/u8:209:07:052
22893992118,2cyclictest31814-21kworker/u8:007:33:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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