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2025-07-12 - 12:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.

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 20 highest latencies:
System rackbslot7s.osadl.org (updated Sat Jul 12, 2025 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2345222607,2238sleep01405-21/usr/sbin/munin22:29:320
2345222607,2238sleep01405-21/usr/sbin/munin22:29:320
4810210555,1039sleep031061-1kworker/0:1H22:39:460
1178276919,735sleep31210-21/usr/sbin/munin20:44:283
17610241315,377sleep017761-21unixbench_singl19:54:340
199812371227,23sleep00-21swapper/021:44:220
18575232512,234sleep018643-21ls21:39:250
2133523046,29sleep00-21swapper/020:06:500
258722303134,150sleep025811-21latency_hist22:04:000
18041228718,257sleep118113-21wc23:19:331
28048226611,239sleep228158-21cat20:29:012
28048226611,239sleep228158-21cat20:29:012
11314225882,30sleep00-21swapper/021:18:580
32242224038,187sleep032373-21timerwakeupswit20:39:290
9450223521,172sleep00-21swapper/022:54:160
1562222744,165sleep21637-21perl22:29:182
1562222744,165sleep21637-21perl22:29:182
28344221713,153sleep028444-21fschecks_time20:29:190
4400220135,49sleep24419-21apt-get19:14:102
2666922017,175sleep031061-1kworker/0:1H20:24:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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