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2026-04-14 - 21:14

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 Tue Apr 14, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8343283079,8266sleep21740-21kworker/2:211:46:292
232022265526,2554sleep220096-21kworker/2:007:25:422
464924937,474sleep24694-21ntpq09:51:492
464924937,474sleep24694-21ntpq09:51:492
158442286111,129sleep215981-21unixbench_multi10:26:542
7134226617,198sleep27186-21latency_hist10:01:222
18112226624,222sleep018153-21uniq08:51:410
1905225348,190sleep21926-21sort11:26:222
140752252118,19sleep20-21swapper/210:21:492
12810224842,185sleep212831-21idleruntime-cro08:36:202
595922468,226sleep26074-21cat11:36:562
238102239106,21sleep20-21swapper/207:26:472
25298223116,200sleep225366-21switchtime10:56:502
18246222742,143sleep218320-21awk12:16:502
21155221715,41sleep20-21swapper/209:01:372
21155221715,41sleep20-21swapper/209:01:372
7584220713,181sleep17635-21cat10:01:411
17785220413,151sleep217918-21latency_hist08:51:232
5167219945,91sleep20-21swapper/208:11:412
26391219591,28sleep20-21swapper/211:01:392
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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