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2025-11-06 - 20:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 20 highest latencies:
System rack9slot4s (updated Thu Nov 06, 2025 12:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
274139911931169,21cyclictest0-21swapper/007:25:040
274149911421111,25cyclictest31850-21apt-get07:35:001
261312587508,64sleep10-21swapper/107:20:201
266622583537,31sleep00-21swapper/007:20:300
2741499203194,6cyclictest0-21swapper/107:25:041
83821230,7sleep02741399cyclictest09:40:250
274139910986,19cyclictest31889-21latency_hist07:35:010
2202121040,3sleep022020-21sh08:32:000
184992860,3sleep041ktimersoftd/009:25:290
112372760,7sleep12741499cyclictest10:25:141
303662750,3sleep041ktimersoftd/009:37:300
121472550,6sleep02741399cyclictest11:00:000
305492460,3sleep041ktimersoftd/010:10:480
236642440,4sleep1211ktimersoftd/110:04:481
223372431,4sleep122351-21ssh12:16:551
27413994224,6cyclictest3-21ksoftirqd/010:44:370
2741499413,6cyclictest21488-21fschecks_time12:50:161
2741499407,5cyclictest81rcu_preempt09:29:161
27414994020,15cyclictest1253-21wget10:15:121
27414994020,15cyclictest1253-21wget10:15:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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